CMAKE_SYSTEM_PROCESSOR is not guaranteed to be defined (per
http://www.cmake.org/Wiki/CMake_Cross_Compiling), and when cross
compiling where it happens to be undefined, this module was broken.
Reviewed-by: Rolf Eike Beer <eike@sf-mail.de>
Previously only the CMAKE_{C,CXX}_FLAGS_<CONFIG> flags were inspected
for relevant flags when compiling the intermediate link file. We need
to also consider the configuration agnostic flags, CMAKE_{C,CXX}_FLAGS
as well.
AppleClang does not support the cxx_thread_local feature, even
though it is based on a Clang version which does support the
feature.
http://stackoverflow.com/a/23850891/2428389
A possible reason for that is that thread_local might be used as
a variable in existing Apple SDK headers.
Extend the WriteCompilerDetectionHeader module to generate a define
for that feature with portability fallbacks. For the avoidance of
making it easy to write code which looks correct but which has odd
runtime behavior, don't set the define symbol at all if no
equivalent keyword is known.
The SunPro Fortran compiler uses "-F" instead of "-E" to request
preprocessing. The output does not go to stdout so use "-o" to
specify the output file.
This fixes the guess originally made by commit b6b37e30 (Makefile: Add
assembly and preprocessed targets for Fortran, 2014-11-05).
bb83cdaa Help: Add notes for topic 'AppleClang-5.1-features'
bd6b42c1 Features: Record for AppleClang 5.1
b341799e Tests: Fix RunCMake.CompileFeatures test NonValidTarget2 case
Fix capitalization of Qt4_FOUND variable when setting it to false in
this case. This caused find_package(Qt4) to appear successful when it
was not. Note that the legacy QT4_FOUND variable is unconditionally
overwritten at the end of the file with the value of Qt4_FOUND.
If this option is enabled, the test step is created with the
EXCLUDE_FROM_MAIN option, and if TEST_BEFORE_INSTALL is enabled, the
install step does not depend on the test step.
This means that the test step is never executed, unless the test target
is explicitly created by calling ExternalProject_Add_StepTarget, or by
passing it with the STEP_TARGETS option, or with the EP_STEP_TARGETS
directory property.
The FindXerces module was added in commit v3.1.0-rc1~155^2 (FindXerces:
New module to find Apache Xerces-C++, 2014-08-17). However, there are
two implementations of Xerces, one in C++:
http://xerces.apache.org/xerces-c/
and one in Java:
http://xerces.apache.org/xerces-j/
Rename FindXerces to FindXercesC to clarify that it is about the C++
implementation.
While at it, add the missing CMake 3.1 release note about this module.
Suggested-by: Erik Sjölund <erik.sjolund@gmail.com>
When compiling the ABI detection test project, do not override
CMAKE_EXE_LINKER_FLAGS completely. The normally selected value of this
variable may influence how the link is done and may be needed to be
representative of how the calling project will be built. Instead pass a
variable that try_compile will reference as additional flags. Leave
this behavior of try_compile undocumented for now.
Revert the feature added by commit v3.1.0-rc1~420^2~2 (FindOpenGL:
Provide imported targets for GL and GLU, 2014-05-31). Unfortunately it
does not work on Windows because the full path to each library file is
not actually known. The IMPORTED_LOCATION of an imported target must be
a full path, but OPENGL_gl_LIBRARY is just 'opengl32' on Windows because
the actual library file is in some implicit link directory that we may
know know.
More infrastructure will be needed in CMake to allow a name-only
imported library. Until that exists, we will not be able to provide
imported targets in FindOpenGL.
In commit v3.1.0-rc1~640^2~5 (Clean up usage of if(... MATCHES regex)
followed string(REGEX REPLACE regex), 2014-04-06) we accidentally broke
logging of the implicit library detection. Restore use of the
intermediate 'lib' variable so that the log message is constructed
properly.
Reported-by: Bill Somerville <bill@classdesign.com>
In commit 079e8469ab (... OpenGL always needs X11 on Unix, 2002-09-05)
the FindOpenGL module was taught to search for X11 as a dependency of
the OpenGL library. This was done without a detailed explanation, and
the dependency should not be explicitly needed because OpenGL headers
should not expose applications to X11 APIs directly.
Unfortunately the only way to know if anything legitimately depends on
this behavior (perhaps in static library cases) is to simply remove it
and wait for issues to be reported. If so, then we can add some kind of
compatibility setting for this later. Add a release note to draw
attention to this change.
Reported-by: Dainius "GreatEmerald" Masiliūnas <pastas4@gmail.com>
Some applications only need the OpenSSL crypto library and want to avoid
linking against the SSL library. Set OPENSSL_CRYPTO_LIBRARY and
OPENSSL_SSL_LIBRARY in the code paths that do not need to find them
separately, and document them publicly. This allows applications to be
more specific when linking against OpenSSL.
f327a9fd Merge branch 'default-lang-dialect' into step2
36bb100e Fix the test for running the CxxDialog unit test.
a3d0ae17 Features: Fix the default C dialect for Clang and GNU.
49e2b689 Features: Fix references to CXX compiler version in Clang-C.cmake.
7565ab2c Features: Test the CXX compiler only if it has features.
These all test the same variable for different values, so only one of them can
ever be true. This also allows to completely remove one variable that only
flagged if one of the conditions matched.
The __STDC_VERSION__ macro may be defined or not depending on the
implementation dialect of C. Test that it is defined before testing
its value.
The CXX tests do not need such a change because they define __cplusplus
in all dialects.
Extend the write_compiler_detection_header interface to allow
specifying a location for supplementary files, and getting the
list of resulting files as a variable.
Clang 3.4 uses C99 by default, and Clang 3.6 uses C11 by default:
http://thread.gmane.org/gmane.comp.compilers.clang.devel/39379
GNU 4.9 uses C90 by default, and GNU 5.0 uses C11 by default:
https://gcc.gnu.org/gcc-5/changes.html
Test that the default compiler settings result in the expected dialect
macros being defined for both C and CXX. Remove the unused main.c
file from the CompileFeatures unit test.
fa1a066a Merge branch 'backport-fix-CMP0054-MSVC' into fix-CMP0054-MSVC
4d52cd36 Avoid if() quoted auto-dereference when checking for "MSVC"
543c4304 Avoid if() quoted auto-dereference when checking for "MSVC"
OS X provides a stub 'java' to inform callers that Java is not present.
When checking the 'java -version' output, look for such a message and if
found pretend 'java' was not found.
Suggested-by: Sean McBride <sean@rogue-research.com>
Improve the fix from commit v2.8.9~136^2 (CPackRPM: avoid leakage of RPM
directive from one component to another, 2012-06-05) to clean up more
temporary variables.
Reviewed-by: Domen Vrankar <domen.vrankar@gmail.com>
Since commit b22e2de8 (HPUX support, 2001-11-05) the FindCurses
module searches for a 'cur_colr' library, but that is not needed
anymore. AFAICT, the cur_colr package was introduced in HP-UX 10.00 and
marked as deprecated in 10.30 by X/OPEN curses (which replaced the even
older HP curses in 10.10).
In order to use cur_colr after 10.10 you should use the
/usr/include/curses_colr when compiling. Since FindCurses doesn't even
search that path the headers cannot possibly match out of the box. If
users want cur_colr they can set the cache entries by hand.
There is no 64-bit version of cur_colr in 11.11PA and it will be gone
completely in 11.31PA:
http://h21007.www2.hp.com/portal/download/files/unprot/STK/HPUX_STK/impacts/i964.html
It is simplest to drop cur_colr support from FindCurses since it was
only partially implemented anyway.
The external project's build process may generate byproducts on which
other rules in the driving project's build later depend. Provide a way
for the driving project to specify what byproducts it expects to be made
available by the custom commands that drive the external project.
32b91b9e Features: Run GNU feature tests with std=c++14 when available.
82c283f9 Features: Use the correct dialect flag when recording features.
b18155b7 Features: Reorder the GNU C dialect feature tests
e68d5c60 Features: Split the Clang testable features to a separate file.
3c497f11 Help: Add notes for topic 'ExternalProject_UPDATE_DISCONNECTED'
aba5cec6 ExternalProject: Add unit tests for UPDATE_DISCONNECTED
3f606fa7 ExternalProject: Add UPDATE_DISCONNECTED option
c0b749cf ExternalProject: Always add a command to a step
Features are currently recorded accidentally for all versions of
AppleClang > 3.4 (I have no idea how that relates to upstream
Clang). Presumably that version has the features which are
accidentally recorded, but in the future features will be
recorded initially for only AppleClang >= 5.1, which would
appear as a feature regression.
Commit v3.1.0-rc1~635^2~11 (Don't load Clang-CXX from
AppleClang-CXX., 2013-11-11) ajusted the logic for the CXX
language. Make a similar change for the C language.
Add support for Sun/Uniforum/GNU gettext libintl. This belongs in CMake
rather than upstream because:
* There are multiple upstreams (Sun, GNU).
* It may or may not be in the glibc C library depending
upon the platform and build options used.
Although we already have a FindGettext module, that is for the tools.
This module is for the library, and is independent because it's
perfectly OK to use libintl without the gettext tools (and vice versa),
and they might not all be found. Add cross references between the two
modules in notes to make the relationship clearer.
The change in commit v3.1.0-rc1~85^2 (ExternalProject: Fix download
retry logic, 2014-09-13) dropped the file(DOWNLOAD) EXPECTED_HASH
argument. This prevents file(DOWNLOAD) from skipping the download if
the output file already exists with the proper hash. Restore this check
with explicit code in the download script.
Reported-by: Ruslan Baratov <ruslan_baratov@yahoo.com>
b6b37e30 Makefile: Add assembly and preprocessed targets for Fortran
0842b084 Makefile: Refactor checks for lang-specific targets and export compile cmds
Since commit v3.1.0-rc1~1^2~1 (Xcode: Fix compiler id detection for iOS
tools, 2014-10-22) our compiler id detection project sets the product
type to 'com.apple.product-type.bundle.unit-test'. This causes the Ld
command line on which we match the path to the compiler to have a
'CompilerIdC.xctest/' component. The commit updated our regex to match
this, but placed it before the extra './' component that Xcode 5.0 and
below produce. Xcode <= 5.0 prints '/./CompilerIdC.xctest/', so switch
the order of the two components in the regex to match it.
If UPDATE_DISCONNECTED is set, the update step is not executed
automatically when building the main target. The update step can still
be added as a step target and called manually. This is useful if you
want to allow to build the project when you are disconnected from the
network (you might still need the network for the download step).
This is disabled by default.
The directory property EP_UPDATE_DISCONNECTED can be used to change
the default value for all the external projects in the current
directory and its subdirectories.
Some generators (i.e. Xcode) will not generate a file level target if
no command is set, and therefore the dependencies on this target will
be broken.
This patch sets an empty echo command that does nothing to avoid this
issue.
The ExternalProject_Add_StepDependencies function add some dependencies
for some external project step.
The syntax is:
ExternalProject_Add_Step_Dependencies(<name> <step> [target1 [target2 [...]]])
This function takes care to set both target and file level dependencies,
and will ensure that parallel builds will not break.
It should be used instead of add_dependencies() when adding a dependency
for some of the step targets generated by ExternalProject. See also:
http://thread.gmane.org/gmane.comp.programming.tools.cmake.devel/8680/focus=8926
When adding step targets using ExternalProject_Add_StepTargets, the
STEP_TARGETS argument or the EP_STEP_TARGETS property, ExternalProject
sets all the dependencies for the main project to that target. Due to
this, the update target cannot be used without downloading and building
all the dependencies.
In order to be able to add step targets that do not depend on other
external projects, this patch adds:
* An optional "NO_DEPENDS" argument to the
ExternalProject_Add_StepTargets function. If this argument is set,
then no dependencies are set for the target (file dependencies will
still be set).
* A new argument INDEPENDENT_STEP_TARGETS to the ExternalProject_Add
function and a new directory property EP_INDEPENDENT_STEP_TARGETS that
behave like STEP_TARGETS and EP_STEP_TARGETS, but cause the
ExternalProject_Add_StepTargets to be called with the NO_DEPENDS
argument.
1531df2b configure_file: Warn about unknown arguments
4abbb140 Qt4: Fix configure_file call to use COPYONLY, not COPY_ONLY
bd7ba8e2 KWSys: Fix configure_file call to use COPYONLY, not COPY_ONLY
e9282782 Help: Fix configure_file call to use COPYONLY, not COPY_ONLY
Cleanup of Windows-wcl386.cmake in commit v3.1.0-rc1~693^2 (Watcom:
Cleanup Windows-wcl386 configuration, 2014-04-01) also introduced use of
the 'symfile' link option but did not mention it in the commit message.
There is no way to set the symbol file name of a target, so it is better
to revert that change. It is easy to run 'wstrip *' if the symbols need
to be stripped, but it is very difficult to get the right names for the
.sym files to install with debug/rel_with_deb_info configurations.
609037f4 ExternalProject: Add unit tests for CMAKE_CACHE_DEFAULT_ARGS
98cdb658 ExternalProject: Add CMAKE_CACHE_DEFAULT_ARGS arguments
36cf8a1e Tests/Tutorial: Fix when USE_MYMATH is OFF
This argument allows to set default arguments that are written in the
initial cache file, but that are not forced, and therefore allows the
user to change these values later (CMAKE_ARGS and CMAKE_CACHE_ARGS
always overwrite the values).
Also add some documentation to explain the differences between these 3
arguments.
Extend ExternalProjectLocal test to cover CMAKE_CACHE_DEFAULT_ARGS.
With CMAKE_C_COMPILER=clang and CMAKE_C_FLAGS='-Wall -Werror', this test
breaks with -Werror,-Wuninitialized. Fix this by getting rid of the
temporary variable.
Convert ExternalProject module documentation to use explicit markup
blocks for each command. Enumerate command options with definition
lists instead of a literal block. This will allow more detail to be
added later. Also fix the logic that parses options out of the
documentation to be aware of the new layout.
Use a bracket comment to hold the documentation instead of a block of
line comments. This will make further updates easier. Also fix the
logic that parses options out of the documentation to be aware of the
new layout.
6e1c359f QtAutogen: Regenerate qrc files if their input changes (#15074)
a2995318 QtAutogen: Expand rccfiles into a vector early in the autogen process.
506151af QtAutogen: Extract a GetRccExecutable method.
When using CMAKE_FIND_ROOT_PATH, FindBoost is able to find the first
component and cache the full path of the directory in Boost_LIBRARY_DIR
so that all components are looked for in same directory. The issue was
that, when looking for the other components, Boost_LIBRARY_DIR was
re-rooted against CMAKE_FIND_ROOT_PATH even though it was already a path
on the host. This change fixes this by disabling the re-rooting in the
find_library call when using Boost_LIBRARY_DIR as a hint.
See http://www.cmake.org/pipermail/cmake-developers/2014-October/011670.html
These variables can be dereferenced by if() alone so do not do it here, avoiding
the risk of their content being treated as a variable name and dereferenced
again.
Get dependencies from the output of ``rcc --list`` if using
Qt 5. Otherwise process the file in the same way as the
qt4_add_resources macro.
This does not work for RCC files which are generated.
The cmake_autogen build step is implemented as a PRE_BUILD step
of the target currently if possible, rather than a standalone
custom target. This is to keep the number of (synthesized)
custom targets that appear in the UI low, but in some cases
it is necessary to fall back to a full custom target.
Fall back to a full custom target for the VS builds if autorcc
is used.
80b19a71 Help/manual: Avoid long lines in code blocks
4fdacedc Help: Clarify formatting of CPACK_WIX_ACL documentation
35ca4863 Help: Wrap long ctest_submit signature line
58b2d760 Modules: Format documentation to avoid over-long preformatted lines
Convert several preformatted code block literals that enumerate lists of
options or variables to use reST definition lists instead. Manually
wrap other long lines in code blocks.
The iOS product type 'com.apple.package-type.bundle.unit-test' requires
code signing on Xcode 6. Other iOS target types do too. Until CMake
learns to add the CODE_SIGN_IDENTITY build attribute itself, toolchain
files can set CMAKE_XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY to tell the Xcode
generator to add the attribute. Teach CMakeDetermineCompilerId to
recognize this variable and add the CODE_SIGN_IDENTITY build attribute
to the compiler id project.
Since commit 0cce556b (Xcode: Use sysroot and deployment target to
identify compiler, 2014-04-29) our compiler id detection project uses
the target platform SDK in case Xcode selects a different compiler based
on it. Now the compiler id project actually compiles with the target
compiler and SDK when cross-compiling.
The iOS tools do not support the 'com.apple.product-type.tool' product
type we use in our compiler id detection project. When targeting
iPhone, use product type 'com.apple.product-type.bundle.unit-test'
instead.
This restores Qt SDK 4.8 and OS X >= 10.6.5 codesign compatibility
improving embedding frameworks using correct bundle layout described at:
https://developer.apple.com/library/mac/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html
1. If Versions/VERSION/Resources/Info.plist is missing, well known
incorrect locations are checked for Info.plist and Info.plist is
copied from there, otherwise codesign will fail.
2. Root framework symlinks to binary and Resources are restored to
point inside Versions/Current, otherwise Qt 4.8 looking for
Resources/ in framework root will fail.
Enable per-component description and summary setting through
CPACK_RPM_<component>_PACKAGE_DESCRIPTION,
CPACK_COMPONENT_<compName>_DESCRIPTION and
CPACK_RPM_<component>_PACKAGE_SUMMARY variables.
Extend the CPackComponentsForAll test to cover these.
When testing CMAKE_<LANG>_COMPILER_ID values, do not explicitly
dereference or quote the variable. We want if() to auto-dereference the
variable and not its value. Also replace MATCHES with STREQUAL where
equivalent.
The condition to use ";" as classpath separator includes a check for the
switch "WIN32" which is a target switch. When cross-compiling for a
non-windows target, this switch is not present and the separator
defaults to ":". It should check for "CMAKE_HOST_WIN32" instead.
631fadea Help: Add notes for topic 'fix-OSX-bundle-rpaths-and-Qt5'
50e261dd OSX: Warn when attempting to change runtime paths on OS X 10.5
9b98fd52 cmake-gui: Make sure we bundle Qt5 Cocoa platform plugin
83a06bb4 BundleUtilities: Framework codesign Resources/Info.plist & Current
f7df82ac BundleUtilities: Resolve & replace @rpath placeholders
14bc686f GetPrerequisites: Make sure dyld placeholders are prefixes
6c313797 BundleUtilities: Use find on UNIX for fast executable lookup
This is done by gathering LC_RPATH commands for main bundle executable and
using it for @rpath lookup in dependent frameworks.
All functions that need to carry rpaths to now take optional <rpaths> argument.
This enabled apps using @rpath to be bundled correctly, which will be necessary
for upcoming Qt 5.4 that will use @rpath for all frameworks.
Check that install_name_tool has -delete_rpath before using it.
Otherwise it will fail with Xcode 3.x on 10.5 which has no -delete_rpath
option for install_name_tool command, that was first introduced in 10.6
SDK, even that 10.5 supports LC_RPATH and @rpath.
It makes whole executable process quicker on UNIX, especially for large bundles
containing many files, since using find narrows results to only files having
executable flags then all further tests follow.
Since find ... -perm +0111 is not clearly POSIX compliant and some Linux
versions refuse it, it is better to use longer but portable:
find ... -perm \( -perm -0100 -o -perm -0010 -o -perm -0001 \)
b7e5c5a2 FindThreads: introduce THREADS_PREFER_PTHREAD_FLAG (#14767)
bcb0e387 FindThreads: introduce an imported target to link to
46368edd FindThreads: move checking of the -pthread compiler flag into a macro
This not only holds the library, but can also hold compiler flags needed, e.g.
the -pthread flag preferred by gcc on some platforms. There was no clean way
to get that compiler flag from the module until now.
ba907f7d FPHSA: fix when requested or found version is exactly 0
4f9bf446 FPHSA: when EXACT version match is requested only compare the components given
Given that you have a foobar that identifies itself as 1.2.3 from now on a
find_package(foobar 1.2 EXACT)
will succeed, as 1.2.3 will now be considered as being 1.2. Until now this was
only the case for version 1.2.0.
f25e431d tests: set sanitizer options properly
f0661bf3 tests: fix copy/paste from tsan -> asan comments
ca9cc25c ctest: add support for additional sanitizer options
0b9ffffc ctest: update documentation for CTEST_MEMORYCHECK_TYPE
This allows a following commit to introduce a switch to prefer that check over
searching for the explicit library names without breaking backward
compatibility.
When testing CMAKE_CXX_COMPILER[_ID] values with if(MATCHES) or
if(STREQUAL), do not explicitly dereference or quote the variable.
We want if() to auto-dereference the variable and not its value.
The FindVTK module only existed to help find_package(VTK) calls work in
old projects written to use "USE_VTK_FILE" instead of "VTK_USE_FILE".
Drop it to allow find_package(VTK) calls to search for VTKConfig.cmake
directly.
The FindITK module only existed to help find_package(ITK) calls work in
old projects written to use "USE_ITK_FILE" instead of "ITK_USE_FILE".
Drop it to allow find_package(ITK) calls to search for ITKConfig.cmake
directly.
df84281d Help: Add notes for topic 'vs-nsight-tegra-generator'
69e198dc VS: Generate Nsight Tegra project revision number
5365c9ac VS: Map Nsight Tegra file types in .vcxproj files
178f56a5 VS: Fix Tegra-Android platform linking of libraries by name
7115702f Tests: Add test for VS Nsight Tegra generator support
a6289499 VS: Generate ANDROID_GUI executables as app packages
c12e4699 Add 'ANDROID_API' target property to set Android Target API
9a4df52a Add 'ANDROID_GUI' target property to mark Android applications
16569abf cmTarget: Track internally whether platform is Android
ef0fd4f0 VS: Teach vcxproj generation about the Tegra-Android platform
d09b60f5 VS: Detect compiler id of Nsight Tegra-Android toolchains
2f071466 VS: Teach VS >= 10 to recognize CMAKE_SYSTEM_NAME 'Android'
Nsight Tegra Visual Studio Edition handles prefixing of library names
with '-l' automatically, so teach the generator not to do so.
Reported-by: Mourad Boufarguine <mourad@boufarguine.name>
Teach CMakeDetermineCompilerId to recognize the Tegra-Android platform
and generate a test project for Nsight Tegra tools. Locate the full
path to CMAKE_<LANG>_COMPILER by computing it within the test project
build environment.
Also teach CMakeFindBinUtils that this variant of the Visual Studio
generator uses UNIX-like instead of MS-like archiving and linking tools.
When testing CMAKE_CXX_COMPILER_ID values with if(MATCHES),
do not explicitly dereference or quote CMAKE_CXX_COMPILER_ID.
We want if() to auto-dereference the variable and not its value.
After updating from Protocol Buffers 2.5.0 to 2.6.0 compilation of the
generated source failed: "This file was generated by an older version of
protoc which is incompatible with your Protocol Buffer headers. Please
regenerate this file with a newer version of protoc.".
Turns out the source and headers generated by way of
FindProtobuf.cmake:PROTOBUF_GENERATE_CPP aren't updated. Adding a
dependency on the compiler executable fixes this issue.
Fix the CMP0054 warning:
CMake Warning (dev) at .../Modules/ExternalProject.cmake:242 (if):
Policy CMP0054 is not set: Only interpret if() arguments as variables or
keywords when unquoted. Run "cmake --help-policy CMP0054" for policy
details. Use the cmake_policy command to set the policy and suppress this
warning.
Quoted keywords like "COMMAND" will no longer be interpreted as keywords
when the policy is set to NEW. Since the policy is not set the OLD
behavior will be used.
Call Stack (most recent call first):
.../Modules/ExternalProject.cmake:1938 (_ep_parse_arguments)
CMakeLists.txt:5 (ExternalProject_Add)
by avoiding a reference to "${key}" or "COMMAND" in quotes.
be6a555d Tests: Test setting a generator platform in a toolchain file
d506fee8 Tests: Use -A option to pass generator platform selection
11c9ddd6 ExternalProject: Use -A option to pass generator platform
29bd843e CTest: Use -A option to pass generator platform selection
eb7d8156 cmake: Add -A option to specify a generator platform
858d5a0b Fix if() checks of CMAKE_SYSTEM_NAME on Cygwin
e177e7af FPHSA: Avoid if() dereferencing of quoted variable
425acc52 cmcurl: Use if(DEFINED) to simplify conditions
cede5cbd libarchive: Avoid depending on if() to dereference a quoted variable
2d97178b FindGTK2: Avoid depending on if() to dereference a quoted variable
0b12815d Modules/Test*.cmake: Use if(DEFINED) to simplify conditions
188a1f23 If: Introduce policy CMP0054 - don't dereference quoted variables in if()
b900c1cc If: Extract cmConditionEvaluator from if() implementation
Do not check file's hash in download script. If hash will not match
command ``file(DOWNLOAD ...)`` will fail with FATAL_ERROR, ``cmake -P``
will exit with unsuccessful code, and the build will stop. Leave hash
checking to the existing implementation in the verify step.
Legacy invocations may pass a variable name where "DEFAULT_MSG" belongs.
When comparing FPHSA_FAIL_MESSAGE to "DEFAULT_MSG", use a leading "x" on
both sides to avoid mistaking the value of the message for a variable
name.