Commit Graph

26 Commits

Author SHA1 Message Date
Brad King 7195aca54f Make platform information files specific to the CMake version
At the top of a build tree we configure inside the CMakeFiles directory
files such as "CMakeSystem.cmake" and "CMake<lang>Compiler.cmake" to
save information detected about the system and compilers in use.  The
method of detection and the exact results store varies across CMake
versions as things improve.  This leads to problems when loading files
configured by a different version of CMake.  Previously we ignored such
existing files only if the major.minor part of the CMake version
component changed, and depended on the CMakeCache.txt to tell us the
last version of CMake that wrote the files.  This led to problems if the
user deletes the CMakeCache.txt or we add required information to the
files in a patch-level release of CMake (still a "feature point" release
by modern CMake versioning convention).

Ensure that we always have version-consistent platform information files
by storing them in a subdirectory named with the CMake version.  Every
version of CMake will do its own system and compiler identification
checks even when a build tree has already been configured by another
version of CMake.  Stored results will not clobber those from other
versions of CMake which may be run again on the same tree in the future.
Loaded results will match what the system and language modules expect.

Rename the undocumented variable CMAKE_PLATFORM_ROOT_BIN to
CMAKE_PLATFORM_INFO_DIR to clarify its purpose.  The new variable points
at the version-specific directory while the old variable did not.
2012-08-24 10:52:23 -04:00
Kitware Robot 9db3116226 Remove CMake-language block-end command arguments
Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block.  This is no longer the preferred style.

Run the following shell code:

for c in else endif endforeach endfunction endmacro endwhile; do
    echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
2012-08-13 14:19:16 -04:00
Kitware Robot 77543bde41 Convert CMake-language commands to lower case
Ancient CMake versions required upper-case commands.  Later command
names became case-insensitive.  Now the preferred style is lower-case.

Run the following shell code:

cmake --help-command-list |
grep -v "cmake version" |
while read c; do
    echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
2012-08-13 14:19:16 -04:00
Brad King 7e58e5bb68 Prefer generic system compilers by default for C, C++, and Fortran
Teach CMake to prefer the system default compiler automatically when no
compiler is specified.  By default use "cc" for C, "CC" for C++, and
"f95" for Fortran.  Load a new Platform/<os>-<lang>.cmake module to
allow each platform to specify for each language its system compiler
name(s) and/or exclude certain names.

Create Platform/(CYGWIN|Darwin|Linux|Windows)-CXX.cmake modules to
specify "c++" as the system C++ compiler name for these platforms.  On
systems that use case-insensitive filesystems exclude C++ compiler names
that are distinguished from C compiler names only by case.

This will change the default compiler selection for existing build
scripts that do not specify a compiler when run on machines with
separate system and GNU compilers both installed in the PATH.  We do not
make this change in default behavior lightly.  However:

(1) If a given build really needs specific compilers one should specify
    them explicitly e.g. by setting CC, CXX, and FC in the environment.

(2) The motivating case is to prefer the system Clang on newer OS X
    systems over the older GNU compilers typically also installed.  On
    such systems the names "cc" and "c++" link to Clang.  This is the
    first platform known to CMake on which "c++" is not a GNU compiler.
    The old behavior selected "gcc" for C and "c++" C++ and therefore
    chooses GNU for C and Clang for C++ by default.  The new behavior
    selects GNU or Clang consistently for both languages on older or
    newer OS X systems, respectively.

(3) Other than the motivating OS X case the conditions under which the
    behavior changes do not tend to exist in default OS installations.
    They typically occur only on non-GNU systems with manually-installed
    GNU compilers.

(4) The consequences of the new behavior are not dire.  At worst the
    project fails to compile with the system compiler when it previously
    worked with the non-system GNU compiler.  Such failure is easy to
    work around (see #1).

In short this change creates a more sensible default behavior everywhere
and fixes poor default behavior on a widely-used platform at the cost of
a modest change in behavior in less-common conditions.
2012-08-02 13:26:01 -04:00
Brad King 796e33734d Factor common code out of CMakeDetermine(ASM|C|CXX|Fortran)Compiler
The compiler candidate list selection and search code for C, C++, ASM,
and Fortran languages was duplicated across four modules.  To look for
compilers adjacent to already-enabled languages the C and CXX modules
each used _CMAKE_USER_(C|CXX)_COMPILER_PATH and the ASM module used
_CMAKE_TOOLCHAIN_LOCATION.  Since commit 4debb7ac (Bias Fortran compiler
search with C/C++ compilers, 2009-09-09) CMake prefers Fortran compilers
matching the vendor and directory of an enabled C or C++ compiler.

Factor out the common functionality among the four languages into a new
CMakeDetermineCompiler module.  Generalize the Fortran implementation so
that all languages may each use the vendor and directory of the other
languages that have already been enabled.  For now do not list any
vendor-specific names for C, C++, or ASM so that only the directory
preference is used for these languages (existing behavior).
2012-08-02 11:33:18 -04:00
Alex Neundorf cf93d63c0a fix #12465: detect the masm compiler ID ("MSVC")
Alex
2011-10-06 17:57:32 +02:00
Alex Neundorf 4258b24134 Add more regex for gcc, always print the ASM compiler ID
Now gcc is also recognized via "Free Software Foundation"

Alex
2011-03-01 22:58:26 +01:00
Alex Neundorf 48f7199df0 It's ELSEIF(), not ELSIF()
Alex
2011-03-01 21:39:19 +01:00
Alex Neundorf d103c751fa Fix bad comparison in the detect assembler-code
(there was a if("${CMAKE_C_COMPILER}") instead of if(CMAKE_C_COMPILER) )

Alex
2011-03-01 21:28:54 +01:00
Alex Neundorf f745220a32 Add support for ASm for the HP compiler.
Alex
2011-02-23 21:16:44 +01:00
Alex Neundorf 00735d4055 Add suport for ASM for the IBM XL compiler
Alex
2011-02-23 21:16:22 +01:00
Alex Neundorf d3e9e8a078 Add support for ASM for the SunPro compiler
Alex
2011-02-23 21:16:00 +01:00
Alex Neundorf 38f92bfbe1 Add ASM support for the Intel compiler
Alex
2011-02-23 21:15:18 +01:00
Alex Neundorf 4b40d4297a Rework the way assembler is handled, use the C/CXX compiler by default
This commit changes the way how the assembler support works in cmake.
The language "ASM" now always uses the C/Cxx compiler instead
of the assembler directly. This fixes #8392, assembler files are
not preprocessed.
If one wants to use the assembler directly, the specific
assembler "dialect" has to be enabled. I.e. to get as/gas,
you have to use now ASM-ATT, the same way for ASM_MASM and ASM_NASM.

Implemented this now for gcc.
SunStudio, IBM, HP and Intel still todo.

Alex
2011-01-30 21:03:37 +01:00
Alex Neundorf 5883c5191e Fix parsing of compiler name with a version number
This fixes #11679, the toolchain prefix was not correctly detected
for arm-eabi-gcc-4.5.2

Alex
2011-01-26 20:52:34 +01:00
Wojciech Migda f1392dc90b Recognize the Texas Instruments DSP compiler (#11645)
The TI DSP compiler predefines "__TI_COMPILER_VERSION__".  Use this to
identify the C and C++ compilers.  For assembler language the C compiler
executable is used:

  $ cl6x -h
  TMS320C6x C/C++ Compiler v6.1.11
  Tools Copyright (c) 1996-2009 Texas Instruments Incorporated

Use this command-line option and output to recognize the assembler.
2010-12-28 12:22:38 -05:00
Alex Neundorf e3dfbf62fc Include CMakeDetermineCompilerId in CMakeDetermineASMCompiler.cmake (#11467)
CMakeDetermineASMCompiler.cmake relied on that somebody else (usually
during enabling C or CXX) already included that file, and broke if that
was not the case.
Thanks to Louis for the patch

Alex
2010-11-17 23:01:36 +01:00
Alex Neundorf b333779e34 Detect a COMPILER_ID also for ASM.
For assembler, the "compiler ID" cannot be detected by "compiling" a
source file, since there is not source file all assemblers understand.
Instead the function CMAKE_DETERMINE_COMPILER_ID_VENDOR() is used to
run the assembler and check its output.
For this the CMAKE_DETERMINE_COMPILER_ID_VENDOR() function had to be
extended so that it creates the run directory if it doesn't exist yet.

In CMakeASMInformation.cmake now also CMAKE_ASM_COMPILER_ID is used
(but there are no such files yet, will come with the support for the
IAR toolchain).

Alex
2010-08-15 16:36:38 +02:00
Alex Neundorf 691fc2baa8 Remove trailing spaces
Alex
2010-08-15 16:08:54 +02:00
Todd Gamblin 2cde67a781 Modules: Fix spelling 'To distributed' -> 'To distribute' 2010-08-09 08:48:31 -04:00
Brad King 3a666595c9 Convert CMake non-find modules to BSD License
This adds copyright/license notification blocks CMake's non-find
modules.  Most of the modules had no notices at all.  Some had notices
referring to the BSD license already.  This commit normalizes existing
notices and adds missing notices.
2009-09-28 11:46:51 -04:00
Alexander Neundorf b53217339d Correct comments and use ASM${ASM_DIALECT} env. var instead of ASM env. var to initialize the the assembler to use.
Alex
2009-09-26 05:20:03 -04:00
Alexander Neundorf 19046aa98c ENH: add support for the MS masm and masm64 assemblers, works with nmake,
not (yet) with the Visual Studio generators

Alex
2008-11-05 17:27:41 -05:00
Alexander Neundorf 3e6decf312 BUG: make the toolchain-prefix recognition work with prefixes which contain
dots (as in arm-unknown-nto-qnx6.3.0-gcc.exe), NAME_WE returns only up to
the 6, instead of everything in front of the .exe

Alex
2008-05-15 12:07:43 -04:00
Alexander Neundorf 21578050a7 BUG: fix handling of assembler executable (with path) #6858
Alex
2008-04-21 18:51:55 -04:00
Alexander Neundorf 5b18b80b58 ENH: initial support for assembler in cmake, needs testing by our users
Alex
2007-06-28 09:14:27 -04:00