While at it, also add a branch using CheckIncludeFileCXX. Also give a better
error message if no supported language is enabled. C++ support isn't working
yet, but it has never worked.
Commit 7235334a (Project: Determine default language dialect for the
compiler., 2015-09-15) introduced a mechanism to determine the default
dialect used for the running compiler. If conditions in
the <CompilerId>-<Lang>.cmake file are such that compile features for
that version of the compiler should be supported, the _DEFAULT_STANDARD
is set to the computed value.
However, the CMakeForceCompiler module allows users to bypass execution of the
compiler by CMake. In that case, do not set the _DEFAULT_STANDARD variable at
all, which effectively disables the compile-features where the module is used.
No compile features have ever been recorded where the module is used so no
functionality is lost.
If variable is set to TRUE, values of all variables prefixed with CPACK_
will be escaped so special characters such as dolar sign, quotes or
foreward slash will not be lost. By default variable is treated as set
to FALSE for back compatibility.
The cpack_encode_variables macro is changed into a function to remove
scope pollution. There should be no other effects.
Move detection over to the compiler id logic where we have already
constructed the list of compiler flags from ARG1 and CMAKE_<LANG>_FLAGS.
Pass the flags when we execute "cl" with "/showIncludes". Also pass "/c"
because we only need to compile, not link. Check the compiler process
exit code before trusting its output.
19934b67 FindPythonLibs: unset temporary _PREFIX variable
f8bc4e11 FindPythonLibs: Use python executable prefix as a hint
a9d32dff FindPythonLibs: Match include dir to library version
e134e53b Add support for *.manifest source files with MSVC tools
da00be63 MSVC: Rewrite manifest file handling with Makefile and Ninja
d488b5c9 Ninja: Always add OBJECT_DIR variable to link rules
6d620f5a VS: Add manifest tool settings to VS 8 and 9 project files
7c5b6ed5 ExternalProject: Use "git stash save --all" only if supported (#15722)
b04c3815 ExternalProject: Use GIT_VERSION_STRING instead of custom method
becb14c9 CPack/DEB: test preserve extra config file permissions
7044e8ee CPackDeb: use of libarchive and removal of fakeroot
415405a3 cmArchiveWrite: control user/group, permissions and recursive file adding
4f2ff601 Tests: Make RunCMake.CPack error messages more readable
81b748ae cmGeneratedFileStream: Fix spelling in comment
If PYTHON_EXECUTABLE is set, then we should look for the libs in the
same prefix, e.g. /usr/local/python -> /usr/local/lib, and on Win32
/Python34/python.exe -> /Python34/libs.
This commit ensures that FindPythonLibs has found the library before
before the search for the include dir begins. The library prefix and
version can then be used to find the matching include dir.
ea2db3bb FindPythonLibs: Fix OS X framework include directory search path
c57334fa FindPythonLibs: Remove PYTHON_INCLUDE_PATH as input
2db092b1 FindPython{Interp,Libs}: Add versions 3.5 and 3.6
Classify .manifest sources separately, add dependencies on them, and
pass them to the MS manifest tool to merge with linker-generated
manifest files.
Inspired-by: Gilles Khouzam <gillesk@microsoft.com>
Add a helper class private to "cmcmd.cxx" to contain the implementation.
Update the link logic to use the intermediate files directory for each
target to hold manifest and resource files before embedding into the
binary. Preserve the old behavior of placing the .manifest file next
to the binary when not linking incrementally even though it will be
embedded.
We use PATH_SUFFIXES to append "python<v>" to each candidate path. Do
not append it to the constructed list of python framework include
directories. Otherwise the combined path will never exist. Note that
the code doesn't yet try to match the suffixes "m" and "u" between the
executable, library, and include directory.
This cmake variable has been deprecated for over a decade, and using it
as an input could potentially cause unexpected results. We still need
to keep it as an output variable for compatibility though.
The calls to find_program now use NAMES_PER_DIR so that the first executable
(e.g. h5pcc) appearing on their PATH will get chosen. The HDF5_PREFER_PARALLEL
variable swaps the search order when it is set to true in the event that a
directory being search contains both h5cc and h5pcc.
When compiling with
LDFLAGS='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld'
the compiler output includes a line like
COLLECT_GCC_OPTIONS='-specs=/usr/lib/rpm/redhat/redhat-hardened-ld' ...
that our link line regex matches due to an argument ending in "-ld".
Since it is not really the link line no implicit link information is
dectected. Exclude "VAR=..." lines from consideration as link lines to
fix this.
Since commit v3.1.0-rc1~635^2~7 (project: Add infrastructure for
recording CXX compiler features, 2013-10-17) we compile a test source to
a binary and then extract "<LANG>_FEATURES:..." strings from the binary
with the file(STRINGS) command. Add a newline at the beginning of the
string literal to be sure file(STRINGS) can extract the first entry as a
string independent of whatever else the compiler may put before the
storage it allocates for the literal within the binary.
04de9007 GHS: Fix generated file path slashes and quoting for 6.1.6
fbe0de92 GHS: Tell MULTI to delete .elf.ael file
63591b94 GHS: Find latest 'int' directory
Mangling is prevented by using a function instead of a macro for setting
default value of some CPack variables. Function is meant for internal use
in CPack.cmake only.
Old macro is deprecated but kept for backwards compatibility - was
intended for internal use only as it can't be used for CPack after
CPack.cmake script is included.
Patch removes local workarounds that were required by old macro,
fixes default setting of variables that by default inherit value from
another variable that already went through old default setting macro
(e.g. value of CPACK_PACKAGE_INSTALL_REGISTRY_KEY caused error for
wrong escapes if CPACK_PACKAGE_INSTALL_DIRECTORY contained escaped
back slashes) and provides a test for correct escaping of characters.
9cdf6ef4 Swift: Add proper Swift compiler test
1aa29f0d Swift: Remove positive Swift language tests
d778a1c2 Swift: Require Xcode 6.1 and for MacOS X at least SDK 10.10
4da60024 Swift: Fix Compiler-Id detection for Swift 2
874a265c Swift: Make SwiftMix compatible with Swift 2
The documetnation of binutils:
https://sourceware.org/binutils/docs/binutils/ar-cmdline.html
suggests to use the parameters "q" and "c" in this order ("q" is
operation, and "c" is the modifier).
Suggested-by: Дилян Палаузов <dilyan.palauzov@aegee.org>
Generally for a module foo, SWIG generates (in Python mode)
an extension module _foo.so and a proxy Python module foo.py.
However, if -noproxy is specified, instead it builds only foo.so
(without the leading underscore). The custom command generated
by CMake correctly handles the removal of this underscore when
-noproxy is given; however, it still adds foo.py to the expected
outputs. This upsets build tools that expect foo.py to be generated
(for example, 'make' will run the SWIG command twice). Fix this
by removing foo.py from the set of extra generated files when
-noproxy is specified.
Add an OPENSSL_USE_STATIC_LIBS option to enable it. Adjust
CMAKE_FIND_LIBRARY_SUFFIXES to only look for .a and .lib files. Also
adjust the search paths on Windows for installer locations of static
libraries.
Provide each variant in ZLIB_LIBRARIES and ZLIB::ZLIB imported location
properties when one is found, while maintaining support for manually
setting the library via ZLIB_LIBRARY.
When the Fortran_HL component is specified, the hdf5_hl library is not included
in HDF5_LIBRARIES which causes a bunch of undefined references at link
time. This commit adds hdf5_hl to the list of libraries to search for when the
Fortran_HL component is specified.
Define HDF5_{Fortran_,}HL_COMPILE_LINE so that HDF5_{Fortran_,}HL_INCLUDE_DIR
and HDF5_{Fortran_,}HL_LIBRARIES are found when the macro is invoked for HL and
Fortran_HL components. (Use patch from debian cmake-data package.)
Starting with Xcode 7 the OSX and iOS SDKs contain only stub
files for dynamic system libraries. These stub files contain
some meta data and a list of exported sysbols in plain text.
They are handled by the toolchain like regular dylibs.
The handling of multilevel dependencies has been fixed in Visual Studio 2013.
The work around used for VS 2010 and VS 2012 does not work for VS 2013 any more.
Switch to normal object build rules for VS 2013 and newer.
Exposed by a CMP0054 warning with code like:
cmake_minimum_required(VERSION 2.8.9 FATAL_ERROR)
project(MyProj NONE)
enable_language(C)
enable_language(CXX)
While at it, use STREQUAL for testing the compiler id against "GNU".
Suggested-by: Rolf Eike Beer <eike@sf-mail.de>
If CMAKE_MINIMUM_REQUIRED_VERSION is not set because no
cmake_minimum_required() call is present this line can lead to an error as that
string is empty so too few arguments are passed to if():
See also "/var/tmp/paludis/build/kde-krdc-15.08.0/work/build/CMakeFiles/CMakeOutput.log".
See also "/var/tmp/paludis/build/kde-krdc-15.08.0/work/build/CMakeFiles/CMakeError.log".
CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:112 (elseif):
given arguments:
"VERSION_LESS" "3.1"
Unknown arguments specified
Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPkgConfig.cmake:501 (_pkgconfig_parse_options)
/usr/share/cmake/Modules/FindOpenSSL.cmake:43 (pkg_check_modules)
This version is generated by the Windows Visual Studio
project files for unknown reasons, but is required to
pick up the debug version of the library created by
current versions of Xerces-C.
Since commit v2.8.7~31^2 (HP: Drive shared library linking with compiler
front end, 2011-12-12) the C compiler is used to link shared libraries
instead of calling the linker directly, so linker options need to be
wrapped as -Wl,-foo instead of -foo.
The compiler version reported since commit v2.8.2~1018 (CTest-side
support for compiler name and compiler version, 2009-10-12) only
reported the version of the compiler used to build CMake, and only
if it defined "_COMPILER_VERSION". Instead use the version of
the compiler used to build the project CTest is testing.
By default Mercurial command "clone" will implicitly call "update" with
the "default" branch after downloading the cloned repository. However
ExternalProject_Add() always generates a second "update" command after
cloning with a tag which is either specified or "tip" (equivalent to
"default" by default). Therefore ExternalProject will first clone then
update to default branch then update to another specified branch if
provided. This leads to potentially very long clone operation (in
particular when the repository default branch contain subrepos) which
can lead to transaction abort triggered by the server.
Simply use "hg clone -U" to avoid the implicit update during clone.
Our following call to "hg update" will take care of updating anyway.
Protobuf 2.6.x and lower do not use CMake (cmake is usable in Protobuf
3.x) but provide legacy Visual Studio projects files. Search their
output directories in 64-bit builds.
The Fortran compiler version detection infrastructure added by commit
v3.3.0-rc1~436^2~9 (Fortran: Add infrastructure to detect compiler
version, 2015-02-17) forgot to update CMakeFortranCompiler.cmake.in to
save the compiler version persistently as we do already in
"CMake{C,CXX}Compiler.cmake.in". Add the missing line now.
As dumpbin.exe is no longer reliable for gcc libraries on MinGW because
it crashes on many common libraries like libgcc_s and libgfortran it is
now necessary too resort to using objdump for DLL dependency walking.
Using objdump has a secondary problem in that it generates a lot of
output for large libraries and causes fixup_bundle() to take many
minutes to process what took fractions of a second with
"dumpbin.exe /dependents".
Add a 'grep' pre-filter in the execute_process() command pipeline to
reduce this output to a minimum for a several orders of magnitude speed
up. If grep is not available just use the full output.
As there does not seem to be a reliable way of detecting MinGW, callers
of fixup_bundle() may have to set the variable gp_tool to "objdump" if
dumpbin.exe is installed on the build machine to stop it using the
broken MS dumpbin.exe for library dependency walking.
Since commit v2.8.5~121^2~2 (FindMPI: Handle multiple languages,
2010-12-29) we called the GetPrerequisites is_file_executable function
but passed the name of a CMake variable instead of its value. Therefore
the function has always failed and caused the search for the compiler
name to run even with an absolute path. Switch to using if(IS_ABSOLUTE)
instead and drop use of GetPrerequisites.
Since commit v2.4.0~4325 (...use gcc -shared, even for C++ libraries,
2003-03-13) we use the C compiler "gcc" to link C++ shared libraries
compiled with "g++". At the time "g++" did not know how to link shared
libraries correctly. This has long since been fixed so simply drop the
special case.
Since commit v3.1.0-rc1~564^2 (OS X: Use -iframework for system
framework directories, 2014-05-05) we test the version of Clang to see
if it supports -iframework. Fix the version test used for AppleClang
since it uses a different version scheme than upstream Clang.
Run our check for the '_' prefix using a bzip2 API function as declared
with a prototype in the real header file. This is needed in case the
function is provided in a DLL import library where the symbol name may
not match without proper markup from the header.
If someone in KDE wants to port away from OLD policies, they might want to do
so one policy at a time. This patch will allow them to use
find_package(KDE4 NO_POLICY_SCOPE)
in callers to get around the CMP0011 warning, while still getting the policy
settings contained within.
The module is not needed anymore for try_compile or try_run. It cannot
be used with CMP0022 NEW behavior due to generator expressions in
INTERFACE_LINK_LIBRARIES, so document it as deprecated. Whatever
problems other than try_compile and try_run anyone tried to solve with
this module will have to be addressed another way.
3e6b2ab6 CPack/DEB: component version of PACKAGE_CONTROL_EXTRA
506f6bc0 CPack/DEB: Remove duplicate string(TOUPPER) calls
32e9276a Tests/RunCMake/CPack/DEB: add verifyDebControl
47d1f118 Tests/RunCMake/CPack: found files should be preserved
Add a TARGET_MESSAGES property to control whether Makefile targets print
the "Built target " completion messages. Default to ON to preserve
existing behavior.
Teach the Makefile and Ninja generators to substitute for an <INCLUDES>
placeholder instead of putting -I in <FLAGS>. Update our values for
CMAKE_<LANG>_COMPILE_OBJECT,
CMAKE_<LANG>_CREATE_ASSEMBLY_SOURCE, and
CMAKE_<LANG>_CREATE_PREPROCESSED_SOURCE
to place <INCLUDES> just before <FLAGS>.
Update our values for
CMAKE_<LANG>_COMPILE_OBJECT,
CMAKE_<LANG>_CREATE_ASSEMBLY_SOURCE, and
CMAKE_<LANG>_CREATE_PREPROCESSED_SOURCE
to place <DEFINES> before <FLAGS> consistently across supported
compilers. We already do this for most compilers, so update the rest
for consistency.
Extend the workaround added by commit v3.2.0-rc1~278^2 (FindMPI:
Workaround Intel MPI 5.0.1 exit code problem, 2014-12-04) with an
additional/alternate keyword to recognize the case with recent GCCs.
The Apple Clang 6.1 compiler that comes with Xcode 6.3 is aware of the
modern -std=c++14 and -std=gnu++14 flags, so use them instead of the
"1y" flags.
Suggested-by: darkapostle@rule506.net
Since commit v3.3.0-rc1~397^2 (Check*CompilerFlag: Refactor method used
to pass flags, 2015-02-24) these check modules pass the flags to the
compiler front-end during linking as well as during compilation. This
breaks checks for flags like '-x c++' that are meant only for the
compilation step. Revert the change and add a test covering a
compiler-only flag.
8f86407c Windows: Optionally generate DLL module definition files automatically
069aa93b bindexplib: Add support for "/bigobj" format objects
61bbbdcf bindexplib: Fix treatment of some symbols
de70c922 bindexplib: Teach DumpFile to return errors
8ea69dfe bindexplib: Build source as part of CMakeLib
2963cb2a bindexplib: Wrap long lines
4ff09893 bindexplib: Drop code that CMake does not need
7de8276c bindexplib: Add copyright/license notice block
65086ad7 bindexplib: Import original implementation from CERN
Allow the `Swift` language to be enabled with the Xcode generator for
Xcode >= 6.1. Reject it on other generators and with older Xcode
versions. Since Apple is the only vendor implementing the language
right now, the compiler id can be just `Apple`.
Added new USES_TERMINAL option to the ExternalProject_Add_Step
function. This option passes USES_TERMINAL to the underlying
add_custom_command call so that the Ninja console pool is used.
Also, corresponding new USES_TERMINAL_<step> options were added
to the ExternalProject_Add function.
Justification: if using Ninja with a CMake superbuild, it's often
desirable to limit the superbuild to ONE sub-Ninja process at a
time to avoid oversubscribing the CPU. Using the console pool also
makes it easy to monitor the progress of the sub-Ninja process.
Independent USES_TERMINAL_<step> arguments are passed to
ExternalProject_Add instead of one USES_TERMINAL argument that
controls everything. Users may wish to run some steps in parallel
but not others (e.g. parallelize configure but not build).
Address the test case
cmake_minimum_required(VERSION 2.8)
set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6)
find_package(PythonLibs 3 REQUIRED)
with a Python 3.4.x .pkg installed from python.org on OSX.
Temporarily set CMAKE_FIND_FRAMEWORK to LAST to avoid finding the
system Python.h prematurely.
Add directories inside the frameworks to the search list for the library
as is done for the header.
Create target property WINDOWS_EXPORT_ALL_SYMBOLS to automatically
generate a module definition file from MS-compatible .obj files and give
it to the linker in order to export all symbols from the .dll part of a
SHARED library.
This was added without explanation by commit v2.8.2~1138 (Add initial XL
C compiler flags for safer builds, 2009-09-30). It is not consistent
with our default C++ flags for XL and disables several optimizations, so
drop it from our default flags for C.
Suggested-by: Todd Gamblin <tgamblin@llnl.gov>
Add a TestLoad setting to CTest that can be set via a new --test-load
command-line option, CTEST_TEST_LOAD variable, or TEST_LOAD option to
the ctest_test command. Teach cmCTestMultiProcessHandler to measure
the CPU load and avoid starting tests that may take more than the
spare load currently available. The expression
<current_load> + <test_processors> <= <max-load>
must be true to start a new test.
Co-Author: Zack Galbreath <zack.galbreath@kitware.com>
Move the Ld invocation match expression from CMakeDetermineCompilerId
into CMakeDetermine{C,CXX,Fortran}Compiler so that it can be specified
on a per-language basis.
Replace caret-headers with double-quote-headers and replace dash-headers
with caret-headers. This makes the headers match their level of nesting
according to our documentation style guide in cmake-developers(7).
If a Windows resource (.rc) source file is included in a STATIC library,
the VS "link" tool will process the compiled ".res" file and needs to know
the target architecture. Without it, we may get a LNK4068 warning and
possibly a LNK1112 error. Add /machine: to the default static library
flags to give the link tool the information it needs.
When constructing the "id_src" value for substitution into VS or Xcode
compiler id projects, the input "src" variable already contains the file
name with no path so we do not need get_filename_component. We know
this because CMAKE_DETERMINE_COMPILER_ID_WRITE already references
"${src}" with this assumption.
8bcec4d2 Help: Add notes for topic 'GNUInstallDirs-special-prefixes'
c8bd37ec GNUInstallDirs: Add special cases for certain prefixes
5f30f175 GNUInstallDirs: Add test cases
54676a0e Help: Add notes for topic 'ConcurrentFortran-compiler-id'
7cd539b1 Add support for Concurrent Fortran 77 Compiler
0d204c1c CMakeDetermineCompilerId: Try matching compiler output to detect id
5f0dad75 CMakeDetermineCompilerId: Refactor id build/check loop logic
c65a060e CMakeDetermineCompilerId: Optionally try some flags before no flags
At least some versions (e.g. C++ Builder 5) of the bcc32 linker are known to
write temporary files with a constant name to the current directory (e.g.
"turboc.$ln"). (This can be verified by using Process Monitor to watch the
file writes that bcc32 / ilink32 / implib make). This causes problems with
some generators that keep a constant current directory and run concurrent
linkers.
For example, the Ninja generator, by default, always has the current directory
set to the top of the build tree - resulting in conflicts between the linkers
that are simultaneously trying to write to "turboc.$ln". Symptoms include
direct errors regarding the "turboc.$ln" file, or later build steps failing due
to corrupted output from previous links that happened to link "successfully."
This is not a problem for the Borland Makefiles generator which does not
run jobs in parallel. For the Ninja generator, work around this problem
by using a link job pool of size 1.
The Concurrent Fortran compiler (ccur.com) is available on Linux and can
be used much like the GNU Fortran compiler. Currently it has no
preprocessor symbols to identify it so we need to detect it by matching
compiler output.
Suggested-by: Anthony Ette <Anthony.R.Ette@controlsdata.com>
Some compilers can only be distinguished by their compilation output
rather than preprocessor symbols or special flags. Add infrastructure
to determine the compiler id by matching output.
Callers of CMAKE_DETERMINE_COMPILER_ID initialize the
CMAKE_${lang}_COMPILER_ID to unset so we can check it at the end of each
loop iteration instead of the beginning. This approach allows us to
break out of the loop as soon as we succeed. It will also allow checks
to be added in more places within the loop later.
Teach CMAKE_DETERMINE_COMPILER_ID to optionally try detecting the
compiler id using some given flags before trying to detect it with no
special flags. This will be useful for Fortran detection to distinguish
some compilers that use the preprocessors of others but have no macro of
their own by getting verbose output.
Teach the module to handle SYSCONFDIR and LOCALSTATEDIR properly if
CMAKE_INSTALL_PREFIX is set to `/` or `/usr` -- i.e. as expected by GNU
Coding Standard (i.e. set SYSCONFDIR to `/etc` and `LOCALSTATEDIR` to
`/var`). Also if CMAKE_INSTALL_PREFIX is set to /opt/pkg, `SYSCONFDIR`
must be set to `/etc/opt/pkg` and `LOCALSTATEDIR` to `/var/opt/pkg`
according to FHS.
Otherwise using a "cc -> ccache" or similar symlink as the compiler
causes FindCUDA to select ccache as the host compiler. Update the logic
added by commit v3.1.0-rc1~354^2 (FindCUDA: Fix OSX Clang & no C
language enabled, 2014-06-12) to apply only in the specific case it is
needed.
Revert commit v3.3.0-rc1~435^2 (Windows-GNU: Do not tell find_library to
treat '.dll' as linkable, 2015-02-18). MinGW tools support linking to
'.dll' files directly and many non-CMake build systems still do not
provide a separate '.dll.a' file.
In commit v3.3.0-rc1~132^2 (FindwxWidgets: Search for wx-config-3.0 in
addition to wx-config, 2015-04-29) we added a second (versioned) name to
the find_program call. Specifying multiple names requires use of the
NAMES option. Add it now. While at it, also add versioned names for
2.9 and 2.8.
Check for this flag explicitly in the --help output before using it. It
turns out there are some versions of the tool that support --version but
not --ignore-missing-info.
Honor the GIT_SUBMODULES option added by commit v3.0.0-rc1~92^2
(ExternalProject: Add option GIT_SUBMODULES, 2014-01-09) during the
'git submodule init' step to avoid initalizing all modules since we
are only going to update the specified subset anyway. This will
be useful for project repositories that have many submodules
(e.g. https://github.com/boostorg/boost).
Reviewed-by: Daniele E. Domenichelli <daniele.domenichelli@iit.it>
d4fd30d8 FindPostgreSQL: Search some more common packaging locations
8bd95059 FindPostgreSQL: Add help text for PostgreSQL_LIBRARY cache entry
a68e9b7c FindPostgreSQL: Document PostgreSQL_LIBRARY_DIRS result variable
cc3aee04 FindPostgreSQL: Search for versions 9.2, 9.3, and 9.4
6a2851a1 FindPostgreSQL: Remove extra whitespace after command open parens
b7ca6f90 FindPostgreSQL: Remove unused lines
Use PATH_SUFFIXES to search more common packaging locations.
On Windows, we can use suffixes to search in the standard Program Files
locations without hard-coding the C:/ path.
On Ubuntu/Debian, starting with PostgreSQL 9.3 the header file pg_type.h
is moved to a separate package (from libpq-dev to postgresql-server-dev)
and consequently the file pg_type.h is moved to a new location:
/usr/include/postgresql/<version>/server/catalog/pg_type.h
While at it, use separate PATH_SUFFIXES variables for library, type and
include (this is merely an optimization).
These cache entries introduced by commit 892b854f (FindBoost: Search for
debug and release libraries separately, 2015-01-26) should be marked as
advanced just as Boost_LIBRARY_DIR was. Also their _LAST values should
be tracked so changes can be detected reliably. Both of these are
handled by code looking in _Boost_VARS_LIB for a list of relevant
variables. Fix construction of this list that was broken by the above
commit.
Reported-by: Sylvain Joubert <joubert.sy@gmail.com>
The CMAKE_FRAMEWORK_PATH and CMAKE_APPBUNDLE_PATH cache variables are
supposed to be used to generate the extra paths passed to pkg-config,
but instead the CMAKE_PREFIX_PATH variable is used.
This bug was introduced by the refactor in commit v3.1.0-rc1~747^2~1.
Add an ExternalData_NO_SYMLINKS to enable use of copies instead of
symlinks to populate the real data files behind a DATA{} reference.
This will be useful on UNIX-like systems when the underlying filesystem
does not actually support symbolic links.
Suggested-by: Matt McCormick <matt.mccormick@kitware.com>
Do not force a specific policy version in the module because it prevents
projects from setting newer policies to NEW. In particular, projects
may want to set CMP0056 to NEW to affect any try_compile calls in this
module.
Use of this was added in commit v2.8.2~714 (FortranCInterface: Use CMake
2.8.0 behavior, 2009-11-17) in order to set CMP0007 to NEW. Simply set
this policy explicitly instead.
Do not force a specific policy version in the module because it prevents
projects from setting newer policies to NEW. In particular, projects
may want to set CMP0056 to NEW to affect any try_compile calls in this
module.
Use of this was added in commit v2.8.2~539 (New CheckTypeSize for OS X
Universal Binaries, 2009-12-17) and updated in commit v3.1.0-rc1~511^2~1
(Do not change minimum required version in modules, 2014-05-07). The
history does not clearly explain why a specific policy version was
introduced. If specific policies need to be NEW then we can add
explicit settings for them.
Fix Squish4RunTestCase.sh to be POSIX compliant by exiting with 255
explicitly instead of depending on bash to translate -1 to 255. This
script is used by the SQUISH_V3_ADD_TEST and SQUISH_V4_ADD_TEST macros
provided by FindSquish.
The openjdk-8 (8u45-b14-2) package on Debian unstable has extra
text after the version number components. Match this and add it
to the reported version string.
CPack DEB and RPM generators were not used for some tests because
CPACK_BINARY_DEB and CPACK_BINARY_RPM variable were not set. Fix this,
simplify generator selection in CTEST_RUN_CPackComponentsForAll, and fix
bugs that were detected after tests were run.
Update logic added in commit 957c2aac (RC: Simplify selection of
resource compiler based on C/C++ toolchain, 2015-05-07) to avoid
overriding CMAKE_GENERATOR_RC. The MinGW and MSYS Makefiles
generators use it to select a windres next to the compiler even
if it is not in the PATH.
20560e8d Ninja: Do not use newlines in response files with Windows GNU tools (#15439)
b3de0dfe Ninja: Use forward slashes for any GCC on Windows (#15439)
378c2a0e Ninja: Refactor detection of MinGW tools on Windows
957c2aac RC: Simplify selection of resource compiler based on C/C++ toolchain
Revert the refactoring by commit v2.8.11~105^2~1 (Ninja: use MinGW
generator code in EnableLanguage, 2013-03-09) and move the MinGW-
specific logic back to the "MinGW Makefiles" generator. Instead teach
the platform information modules for GNU and MSVC on Windows to set the
preferred RC compiler just before enabling the RC language. This way
we choose the RC compiler based on the C/C++ toolchain that is actually
enabled.
This reverts commit 242c3966 (add_custom_command: Diagnose
MAIN_DEPENDENCY limitation, 2015-03-09) and the follow up commit
b372a99a (UseSWIG: Do not use MAIN_DEPENDENCY on custom commands,
2015-03-26).
I misdiagnosed the underlying issue that prompted creation of policy CMP0057.
The actual issue surfaces when a single custom command's MAIN_DEPENDENCY
is listed in more than one target; this issue will have to be addressed
independently.
The documentation of this variable in the CTest module is outdated
and has been superseded by the ctest(1) manual. In particular, the
latter mentions that it works with the Ninja generator as well as
makefile generators. Remove the documentation from the CTest module
and replace it with a link to the main variable documentation (which
already references the ctest(1) manual).
Fix the logic added by commit v3.0.0-rc5~9^2
(InstallRequiredSystemLibraries: MBCS MFC is optional on VS 12,
2014-05-06). Do not test content of MSVC${v}_MFC_DIR until after the
variable is set.
Use file(GENERATE) to write the logging wrapper scripts to evaluate
generator expressions. Use a per-config script names in case the
content varies by configuration.
Use file(GENERATE) to write the initial cache file so that we can
evaluate generator expressions. Use a per-config initial cache file
name in case the content varies by configuration.
Preparation for per component variables.
Patch makes sure we know which variables
will be set for per component generator
and also prevents accidental overflows
of variable values between components.
During compilation of the intermediate link file, the output directory
may not be present in Visual Studio builds. This fix makes sure the
output directory exists before generating the output file.
Suggested-by: Irwin Zaid
66b641f4 Help: Add notes for topic 'add-GreenHills-MULTI-generator'
48004d9d Add a 'Green Hills MULTI' generator on Windows
051d8be1 cmLocalGenerator: Constify some cmTarget and cmGeneratorTarget arguments
Green Hills MULTI is an IDE for embedded real-time systems. The IDE's
product page can be found here:
http://www.ghs.com/products/MULTI_IDE.html
It supports cross compiling on ARM, Intel x86, and other architectures
with various operating systems. The IDE exists on Linux and Windows
host systems, but CMake will currently only generate the project files
on Windows host systems.
Refactoring of content list that removes
use of find and sed to make listing algorithm
more clear and remove external dependencies.
Patch also limits man pages handling to
locations listed in brp-compress rpm script
by default - fixes bug report #14660.
The UPPERCASE name was inconsistent with config-packages, the
find_dependency macro, and even FPHSA itself, which expects
components to be specified with names matching ExactCase.
The FOUND_VAR was only permitted to have two possible values, and
now both are set for compatibility. Document it as obsolete, and
adjust the code for the same. Users of the variable should just
remove it.
When SWIG_GET_EXTRA_OUTPUT_FILES checks to see if a source file exists
for use in reading the module name, it must pass an absolute path to
the if(EXISTS) command. Teach SWIG_ADD_SOURCE_TO_MODULE to give it
the absolute path it already knows.
I was previously appending to nvcc_flags inside the file loop. This
caused the flag to be appended multiple times which freaks out nvcc.
Now the flag is specifically handled per file.
A previously undocumented feature allowed overriding the format
specified to CUDA_WRAP_SRCS with a source file property called
CUDA_SOURCE_PROPERTY_FORMAT. I added documentation for this feature as
well as added the ability to let nvcc compile any file regardless of
type if this property was found.
In addition, I also fixed a couple of bugs with the calls to
_cuda_get_important_host_flags that weren't garding the arguments with
"" to prevent empty values from causing errors.
If the host flags contain a c++11 flag (at least for gcc), then we can't
automatically propagate to nvcc it using -Xcompiler. This is because
nvcc can't use any C++ only flags. Instead we find this flag and add it
to nvcc's flags (it has a special flag for dealing with c++11 code) and
remove it from the host flags.
Co-Author: Guillermo Marcus <gmarcus@nvidia.com>
VS 2013 originally claimed to support initializer lists but a bug was
found in which it generated bad code silently. For this reason we
previously considered support to not be present. However, Update 3 adds
a hard error on cases that previously generated bad code, so it is now
safe to use initializer lists with VS 2013 Update 3 or greater. At
worst a compiler error will be issued in the cases that do not work, but
that is no different from any other compiler-specific workaround a
project code may need.
Beginning in CUDA 5.5 a static version of the cuda runtime library
became available. Since nvcc defaults to using this library over the
shared version, FindCUDA will also default to using this version. There
are many advantages to using the static version (most importantly to
avoid conflicts with multiple versions when building a CUDA based
library). Offer a CUDA_USE_STATIC_CUDA_RUNTIME option to control
this behavior.
RPM packages can contain symbolic links to relative paths - including
support for multiple relocation paths through generation of post install
relocation scripts. Add basic support with limitations described in
documentation.
Add the dependency on the main swig input source file as a normal
DEPENDS option. We cannot use MAIN_DEPENDENCY because if there are
multiple target languages then multiple custom commands would want to
use the same MAIN_DEPENDENCY, but at most one custom command may specify
a given source file as its MAIN_DEPENDENCY. Exposed by a CMP0057
warning.
Extend the ``DATA{Dir/,...}`` syntax with a new ``RECURSE:`` option
to enable recursive matching of associated files. This will allow
an entire directory tree of data to be referenced at once.
Extend the _ExternalData_arg_find_files signature with an option to
specify the kind of file(GLOB) operation to be performed. Set
CMP0009 to NEW so that GLOB_RECURSE does not follow symlinks.
Teach the Xcode generator that ONLY_ACTIVE_ARCH=YES means to use ARCHS,
and that the default of ONLY_ACTIVE_ARCH=NO means to use NATIVE_ARCH and
ignore ARCHS. In the latter case there is no reason to generate ARCHS.
The `binary_dir` variable is never set, so this is invalid. Instead, use
"." which all the other build commands use anyways. Also only set the
--config option if it is meaningful.
The compiler documents that USE statements search for ".mod" files
in directories specified with -I, but not -isystem.
Reported-by: Hugh Sorby <h.sorby@auckland.ac.nz>
Replace an old hack of the form 'if("${VAR}" MATCHES "^${VAR}$")'
with the much simpler 'if(NOT DEFINED ${VAR})'. This was exposed
by a CMP0054 warning.
The Xcode 5 platform specific framework locations differ from the Xcode
6 ones. Look first for the Xcode 6 ones, then for iOS Xcode 5 ones and
last for the Xcode 5 OS X ones.
For reference, the XCTest.framework is located as follows:
Xcode511.app/Contents/Developer/Library/Frameworks/XCTest.framework
Xcode511.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/Developer/Library/Frameworks/XCTest.framework
Xcode511.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/Developer/Library/Frameworks/XCTest.framework
Xcode601.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks/XCTest.framework
Xcode601.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks/XCTest.framework
Xcode601.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks/XCTest.framework
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>
4178cd88 Help: Add notes for topic 'xcode-xctest'
87a4b858 Tests: Add XCTest example to test Frameworks and Cocoa App Bundles
ba14510b OS X: Add FindXCTest module
3714955b OS X: Add handling for XCTest bundles
54a5cdbb Tests: Compute Xcode version for any generator on OS X
Add a module to lookup XCTest Framework and xctest utility.
It also provides APIs for creating 'xctest' targets.
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>
The PGI compilers on Linux do not have the -fPIE flag. Remove the table
entry added by commit v2.8.9~125^2~2 (Add platform variables for
position independent code flags, 2012-05-05), which likely included it
only as part of a sweeping introduction of such flags.
Since commit v2.8.11~63^2 (UseJava.cmake: require explicit request to
include jars, 2013-03-26) the argument parsing always overrides the
variable settings even if the corresponding arguments are not passed.
Re-order logic to fix this.
Fixes mantis bug report with id 15169. Some
component specific attributes were leaking
to next component. Leakage handling was
implemented in different locations but there
were still attributes that leaked. Patch
encapsulates generator into function so all
current leaks are fixed and no future leaks
can occur.
Implement a brand new FindMatlab module:
- Add support for versions and components.
- Find Matlab and its version in a more precise and multiplatform way.
- Add API to create a new mex extension with documentation.
- Add API to add matlab unit tests (with or without the unit test framework).
- Find as much as possible based on a single Matlab_ROOT_DIR cache entry
and allow the user to change it to re-find everything.
Protect against variables named "CSHARP", "PERL", "PYTHON", or "UNKNOWN"
when CMP0054 is not set to NEW.
Reported-by: Tuukka Pasanen <tuukka@iocaste.ilmi.fi>
Previously the module did not support projects using installation
components because install(PROGRAMS) was never called with COMPONENT.
Add an option to specify the COMPONENT so that projects doing this do
not have to resort to using CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP and
writing the install rule by hand.
In commit 3ec02547 (CPackRPM: Allow multiple path relocation prefixes
for one package, 2015-01-21) a regression was introduced that causes
parent directories of relocation paths to be incorrectly included in
the rpm. Fix this and make the test case more strict to cover it.
In Platform/Windows-MSVC the C and CXX flags are initialized to
contain preprocessor definitions describing the platform. On
WinCE platforms this may not be just -DWIN32. This information
may be important to RC sources too, so add such preprocessor
definitions to the default RC flags.
Suggested-by: Gunnar Roth <gunnar.roth@gmx.de>
The RC language is special in that it is automatically enabled
on Windows-based platforms when another primary language is
enabled. Move enablement of RC from early in the enablement
of the other language to late. This will allow it to use
information detected as part of enabling C, CXX, or Fortran.
3d612c73 MSVC: Compile with arch-specific flags on ARM platforms (#14552)
886dcaa7 MSVC: Distinguish among ARM architectures more precisely (#14552)
ea986676 MSVC: Define /DWINCE when building for WinCE platforms (#14552)
Allow URL templates to contain a %(algo:<key>) placeholder that is
replaced by mapping the canonical hash algorithm name through a map
defined by the <key>.
Extend the Module.ExternalData test to cover the behavior.
Extend the RunCMake.ExternalData test to cover error cases.
Refactor the Check*CompilerFlag modules to pass the flags to
Check*SourceCompiles using CMAKE_REQUIRED_FLAGS instead of
CMAKE_REQUIRED_DEFINITIONS. Both end up being used, but the variable
for "FLAGS" is more precise.
The change in commit v2.8.12~218^2 (CPackRPM protect '@' character in
filename processed in the spec file, 2013-07-05) was not necessary after
commit v2.8.12~439^2 (Add support for componentized USER spec file,
2013-04-01). The latter replaced ${VAR} references in the spec file
template string with \@VAR\@ references, thus protecting '@' symbols
automatically. This caused CPackRPM to break paths with @ symbols.
Revert the change to fix the behavior, and add a test case.
Otherwise find_library is unable to lookup the XCTest framework which
is not located in the SDK serach path:
In the 10.10 SDK the SDK frameworks are located here:
$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks
whereas the Platform SDKs are located here:
$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/Library/Frameworks
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>
If a feature is added multiple times via ADD_FEATURE_INFO it should
appear only once in FEATURE_SUMMARY.
Signed-off-by: Gregor Jasny <gjasny@googlemail.com>
CPACK_RPM_<component>_PACKAGE_ARCHITECTURE variable allows
the same project to support packages of different architectures
including noarch, native and foreign architectures.
BuildArch must only be added to a spec file for a "noarch" package or
rpmbuild will fail. For all others, the --target argument sets the
package architecture. In the process of Fixing rpm architecture, we
make it mandatory, adding a default value of native architecture (the
same as if no --target argument is present). Update the documentation
at the top of the file to make it mandatory.
Clang Static Analyzer is so smart that it reports a defect when this
intended null-deref is encountered. Use sizeof instead which has no
runtime effects.
This check was first added by commit v3.0.0-rc5~6^2 (FindCurses: Detect
and satisfy ncurses dependency on tinfo, 2014-01-17), but it is not
correctly conditioned on existence of the tinfo library and fails if the
code path is taken but tinfo is not found. However, since commit
v3.2.0-rc1~369^2 (FindCurses: Drop search for deprecated HP-UX cur_colr
library, 2014-11-17) the result of the check is not used, so simply drop
it.
Since jsoncpp 0.7.0 (2014-11-20) the upstream may provide a CMake
package configuration file such that find_package(jsoncpp) will find a
jsoncppConfig.cmake file. In order to avoid conflicting with this
(especially on case-insensitive filesystems), and since we always prefer
projects to provide package config files (that they maintain), it is
better to not provide FindJsonCpp publicly.
Move FindJsonCpp into a private source directory that is not installed
so that we can still use it for building CMake itself.
Reported-by: Ryan Pavlik <ryan.pavlik@gmail.com>
4cf3589e Help: Add notes for topic 'compiler-version-Fortran'
f611406f Fortran: Test that CMAKE_Fortran_COMPILER_VERSION is set (#15372)
c6e1f464 Fortran: Detect G95 compiler version
0033faac Fortran: Detect PGI compiler version
302d47b1 Fortran: Detect XL and VisualAge compiler versions
8c8b77a5 Fortran: Detect GNU compiler version
49562a77 Fortran: Detect PathScale compiler version
aa77b631 Fortran: Detect SunPro compiler version
2e09c423 Fortran: Detect Intel compiler version
e6ebc814 Fortran: Add infrastructure to detect compiler version (#15372)
Fortran does not offer syntax to compose a string literal at
preprocessing time from numeric compuations. Instead encode each digit
of each component as a separate INFO string and compose them in CMake
code after extraction. Support MAJOR, MINOR, PATCH, and TWEAK
components with up to 8 digits each.
When matching implicit library names, use a sentinel "x" to avoid
ever expanding the library name as a variable. This was detected
by a CMP0054 warning.
The project has moved from <http://www.coin3d.org/> to
<https://bitbucket.org/Coin3D/coin/wiki/Home>. Simply drop the
out-dated link. Few find modules have links to the project sites.
Anyone looking to use a given find module likely already knows about the
project it finds and can use a search engine to find its homepage.
The file(GLOB_RECURSE) call added by commit 3ec02547 (CPackRPM: Allow
multiple path relocation prefixes for one package, 2015-01-21) should
not follow directory symlinks, so make sure CMP0009 is set to NEW.
1814cf74 Help: Add notes for topic 'add-CheckFortranCompilerFlag'
54e900ab CheckFortranCompilerFlag: Add test case
393a45e2 CheckFortranCompilerFlag: Add module to check Fortran flag existence
This bug caused c_function_prototypes to not be recorded at configure
time when compiling with -std=gnu99 or similar. In the case of feature
recording, that was not a problem, because the logic in
CMakeDetermineCompileFeatures.cmake currently assumes that a feature
present for an earlier standard is present for a later standard.
However, the detection strings are also used in WriteCompilerDetectionHeader,
so the feature macro has been defined to '0' when using a later language
dialect.
Fix that by not checking the existence of the __STDC_VERSION__ macro at
all when detecting C90 features.
If no compiler feature information is known for a given compiler
version, do not set a language standard default either. The two
settings must be recorded consistently.
When targeting Windows with a 64-bit architecture, use "$PROGRAMFILES64"
to get the Program Files folder. Use CMAKE_SIZEOF_VOID_P to check for
the architecture size instead of CMAKE_CL_64 because the latter is not
defined for all compilers.
Inspired-by: Hugh Sorby <h.sorby@auckland.ac.nz>
Inspired-by: İsmail Dönmez <ismail@donmez.ws>
809a5a5e Help: Add notes for topic 'CTestCoverageCollectGCOV-refinements'
03c0812c CTestCoverageCollectGCOV: Fix handling of international characters
8caa4e72 CTestCoverageCollectGCOV: Add test case
5c828cc8 CTestCoverageCollectGCOV: Allow custom flags to gcov
30cb628e CTestCoverageCollectGCOV: Fix handling of large file counts
Initialize CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO_INIT from the value
of CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO_INIT rather than the one for
the DEBUG configuration. This typo has been present since the logic was
first added in commit 36db45082e (ENH: fix up several problems with new
stuff, 2002-11-11).
Reported-by: Gunnar Roth <gunnar.roth@gmx.de>
When loading the list of target support directories, read the file
with UTF-8 encoding since that is what CMake writes into the file.
This allows us to support international characters in the path to
the build tree containing the target support directories.
Add a GCOV_OPTIONS option to allow specification of custom flags. In
ctest_coverage gcov support, if you set CTEST_COVERAGE_EXTRA_FLAGS, they
get put on the command line before the -o. In this case we remove the
-b and replace it with GCOV_OPTIONS. All other arguments remain the
same.
The "cmakexbuild" wrapper is not needed for Xcode 4 and above, and the
path to it may change when CMake moves. Avoid storing a specific path
to a build program in CMakeCache.txt and instead compute the value for
CMAKE_MAKE_PROGRAM on demand. However, if a user does set the value
explicitly then honor it.
This does for Xcode what commit v3.0.0-rc1~260^2~4 (VS: Switch to
internal CMAKE_MAKE_PROGRAM lookup by generators, 2013-11-15) did for
Visual Studio generators.
This will make them use the 'console' pool with the Ninja generator.
Impacted targets are:
- Built-in targets: install, install/local, install/strip, tests,
package, package_source, rebuild_cache
- Targets provided by the CTestTargets module: Nightly, Continuous,
Experimental,
and all their variants (*Start, *Configure, ...)
Within an existing build tree, if the stamp for a step already exists
when one activates the ALWAYS option, we still want it to always build.
Remove the step stamp file during CMake configuration to ensure it does
not exist when the ALWAYS option is enabled.
f3e0b6f1 CTestCoverageCollectGCOV: Add module to run gcov
6dd980e0 ctest_submit: Make CDASH_UPLOAD mode arguments more strict
5dc33f89 ctest_submit: Add CDASH_UPLOAD mode to upload files to CDash
Provide a function to run gcov and create a tarball of results.
Since CDash tracks the md5sum of the files uploaded, use the
--mtime option with "cmake -E tar" so that tar files could be
created that would have the same md5sum with the same content.
965a50dc Features: Fix GNU 4.4 and 4.5 C standard level flags
7f4154a4 Features: Fix CompileFeatures non-feature tests for space in path
f40c19b5 Features: Fix CompileFeatures test for C non-features
004e1540 Features: Record for GNU 4.4.
2a5ca650 Features: Wrap failure-test in UNIX condition.
1ae2c6b2 Features: Blacklist cxx_constexpr test for GNU 4.5.
c66e3317 Features: Use a more-common feature in cycle-test.
c43a6dc5 Features: Update comment in test to match the code.
78259135 Features: Test presence of cxx_auto_type with genex.
7b9fc88b Features: Remove outdated comment.
00194ea7 Help: Add notes for topic 'SolarisStudio-compile-features'
bcb04783 Features: Record for SolarisStudio 12.4.
536c535c Features: Adjust cxx_variadic_templates unit test for SolarisStudio.
5d57970d Features: Use variable in cxx_inheriting_constructors test.
69182ce4 Features: Ensure that the cxx_auto_type test is correct.
59e6e15c Help: Add notes for topic 'WriteCompilerDetectionHeader-multi-file-lang'
54156d72 WCDH: Generate per-language files in multi-file mode.
d84d6ed4 WCDH: Allow compilers to specify features for one language but not the other.
7dcdfec9 WCDH: Find a language-specific DetermineCompiler.cmake if present.
In commit v2.8.6~102^2~18 (Better support for lib64 and Debian
multiarch, 2011-07-14) variable names "..._LANGUAGE_ARCHITECTURE" were
set instead of the correct "..._LIBRARY_ARCHITECTURE". Fix this typo
and also set the language-independent variable
CMAKE_LIBRARY_ARCHITECTURE.
b937f753 FindQt: explicitely mention that it cannot Qt5 or later
6af8cbf2 FindQt: fix variable name in error message
49d05a47 FindQt: fix setting DESIRED_QT_VERSION if "find_package(Qt VVV)" was called
In case the given version was not only "3" or "4", but something like "4.8"
DESIRED_QT_VERSION was set to an unsupported value. While at it also check
that the version passed in is really in the range of 3.x and 4.x. Also
suggest switching to the more specific find modules if possible.
770ba876 Help: Add notes for topic 'GNU-4.6-compile-features'
b15c008f Features: Record for GNU 4.6.
f13a2eb1 Features: Adjust the RunCMake test to use more-common features.
1f19ac4d Features: Adjust cxx_variadic_templates unit test for GNU < 4.7.
0798d1e5 Features: Extend the generalized_initializers test for GNU < 4.7.
938bd94e Features: Test __GXX_EXPERIMENTAL_CXX0X__ macro for GNU < 4.7 compatibility.
462c630b Features: Don't test __cplusplus value for CXX98 on GNU.
222ec86f Features: Test an old value of __STDC_VERSION__ for GNU < 4.7 compatibility.
6e909035 Features: Record C/CXX dialect flags for GNU 4.6.
bfc995cc Features: Remove wrong content from else() condition.
1532b921 Features: Make cxx_noexcept available from GNU 4.6.
1f4649e6 Features: Update the default_dialect test for old GNU-like compilers.
a60027a6 Features: Ensure appropriate return value from feature test macros.
The macro is defined to 1 for GNU 4.6, and such a test is only
useful for features in language dialects newer than the
default (CXX98 for GNU currently).
Test only that it has a truthy value.
As this is not elseif(), the content has no effect.
Rather than changing it to an elseif(), remove the conditional content.
All versions of GNU prior to 5.0 default to C90/89.
Clang-C.cmake has a similar code block which correctly uses
elseif() for setting the default C dialect to C99. That may have
been updated from a C90 default at some point, so leave the
version condition there in place for now.
GNU-CXX already has complex logic and sets the _result to 0 before
tests which may set it to something else.
Change the other modules to be consistent with that.
Add support for a special URL template to map the fetch operation
to a project-specified .cmake script insead of using file(DOWNLOAD).
Extend the Module.ExternalData test to cover the behavior.
Extend the RunCMake.ExternalData test to cover error cases.
Move the basic DATA{} description to a section just before the
file series description. Move all sections on referencing files
into subsections of a common "Referencing Files" section.
Subsume example usage into the introduction since it gives a
high-level starting point to understand the rest of the docs.