Dragos Carp authored Oct 24, 2013 and Brad King committed Oct 28, 2013

Support new languages using CMAKE_MODULE_PATH.

When compiler id detection also provides a CMAKE_<LANG>_COMPILER
value, use it unconditionally.  It is known to be the compiler
that is actually in use by IDE builds in VS and Xcode.  Do not
let a stray cache entry try to say otherwise.

Even though this variable gets set to CMAKE_<LANG>_COMPILER-NOTFOUND when
the compiler is not found, CMake<LANG>Compiler.cmake gets removed by
cmGlobalGenerator::EnableLanguage so in try compiles the value is empty.
Quote references to the variable in

 Modules/CMake(C|CXX|Fortran)Information.cmake
 Modules/CMakeDetermineCompilerId.cmake

to avoid dropping arguments from commands that expect them.

If no CMAKE_${lang}_COMPILER is available then do not try to run
it to determine the compiler vendor.

Teach CMakeDetermineCompilerId to skip trying to build a .vfproj
file for Intel Fortran under Visual Studio 6.  The msdev command-line
build produces a popup error dialog that hangs the configuration.

Teach CMakeDetermineCompilerId to use a .vfproj project file to
build the Fortran compiler id source file under the Visual Studio
generators.

The Intel Fortran compiler needs the /fpp option to enable C
preprocessing.  Without the option the compiler may warn and ignore
preprocessor lines instead of failing with an error.  Detect the
warning and treat it as failure so that we move on to try /fpp and
detect the correct id.  Without this it works only by luck because
Intel is the first compiler id in our detection source file.

When the platform toolset is from Intel, look for "icl.exe" instead of
"cl.exe".

Some compilers try to simulate other compilers as a drop-in replacement
supporting all the same command-line options and predefined preprocessor
macros.  In such cases it will be useful to have CMake load the compiler
information files for the simulated compiler instead of duplicating the
information.  Teach CMakeDetermineCompilerId to extract the simulated
compiler id and version when the compiler id detection provides it.

Add initialization of the ARCHITECTURE_ID local and fix the
initialization of the COMPILER_ID_TWICE local.

Patrick Gansterer authored Sep 25, 2013 and Brad King committed Sep 25, 2013

The subsystem must be set to WINDWOSCE for some SDKs to link an
executable. Set it to 9 for VS2005 and to 8 for VS2008, since the
value differs between the different Visual Studio versions.

When the VS IDE build output setting

  Tools -> Options -> Projects and Solutions ->
   Build and Run -> MSBuild project output verbosity

is set to "Diagnostic" the build output contains a " (TaskId:###)"
suffix on the CMAKE_<lang>_COMPILER= line used to extract the compiler
executable location.  Strip this suffix before checking that the
reported location exists.

Read the machine field from the COFF file header to get the exact
target architecture for ARM and SHx on the Windows platform.

Since we do not need the information about the target architecture
we can use the PlatformName only to specify the this information.
This also removes setting of the MSVC_*_ARCHITECTURE_ID variable
which is not required, because this variable gets set by the
compiler detection code in CMAKE_DETERMINE_COMPILER_ID_CHECK().

Move the code which sets CMAKE_VS_PLATFORM_NAME from
cmGlobalVisualStudio8Generator to cmGlobalVisualStudio7Generator.

The Microsoft linker is intelligent enough to detect the target
machine type depending on the input files. This allows us to
get the target architecture from the compiler instead of
maintaining the mapping to the platform name.

id_machine6 is never set to an other value than x86. So it is
safe to remove the replacements with "x86" directly.

Alexander Mohr authored May 08, 2013 and Brad King committed May 08, 2013

This enables detection with the VS2012 CTP for windows Blue (8.1).
To build native ARM you need to have the WOA SDK (Windows on ARM).

Implement generator toolset selection (cmake -T) for Xcode > 2.0 by
adding the GCC_VERSION build setting to project files.

Set the entry point to mainACRTStartup to make sure that main()
can be found when linking the application to check the compiler.

Some WinCE linker only work when the subsystem is set to WINDOWSCE.

Patrick Gansterer authored Nov 20, 2012 and Brad King committed Nov 27, 2012

Add a dummy mainCRTStartup() function, since the linker searches for
it instead of main() and set the CMAKE_SYSTEM_* variables depending
on the MSVC_C_ARCHITECTURE_ID and CMAKE_VS_WINCE_VERSION variables.

Patrick Gansterer authored Nov 20, 2012 and Brad King committed Nov 26, 2012

When adding more platforms to the Visual Studio generators a simple
regular expressing can not handle all cases anymore. This new
define holds the name of the Visual Studio target platform.

If the TargetMachine isn't defined the linker will choose
the correct target depending on the input file. This helps
us later with additional compiler platforms for WinCE.

Xcode honors this environment variable if the project file does not set
it.  Hide it from Xcode while building the compiler id project.

Use the registry entries that vsvars32.bat uses to detect the location of
MSBuild.exe in the framework directory.  Invoke MSBuild with the option

 /p:VisualStudioVersion=$version

so it knows from which VS version to load the system build rules.  Teach
cmGlobalVisualStudio11Generator to set its ExpressEdition member using the
registry.

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.

Configure a hand-generated Visual Studio project to build the compiler id
source file since we cannot run the compiler command-line tool directly.
Add a post-build command to print out the full path to the compiler tool.
Parse the full path to the compiler tool from the build output.

Configure a hand-generated Xcode project to build the compiler id source
file since we cannot run the compiler command-line tool directly.  Add a
post-build shell script phase to print out the compiler toolset build
setting.  Run xcodebuild to compile the identification binary.  Parse
the full path to the compiler tool from the xcodebuild output.

Teach CMAKE_DETERMINE_COMPILER_ID to check for variable
CMAKE_${lang}_COMPILER_ID_TOOL after CMAKE_DETERMINE_COMPILER_ID_BUILD
to use as CMAKE_${lang}_COMPILER since it will not be known until after
the IDE runs.

In CMAKE_DETERMINE_COMPILER_ID_BUILD prepare a cascading "if" so we can
use a generator-specific method to compile the identification source
file.  Leave "if(0)" as a placeholder for now and put the direct
compiler invocation in "else()".  After running the compiler to build
the compiler identification source we file(GLOB) the list of output
files as candidates for extracting the compiler information.  An IDE may
create directories, so exclude exclude directories from this list.

Kitware Robot authored Aug 13, 2012 and Brad King committed Aug 13, 2012

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

Kitware Robot authored Aug 13, 2012 and Brad King committed Aug 13, 2012

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

This must have been left in accidentially.

Alex

Teach CMakePlatformId.h to construct an "INFO:compiler_version[]" string
literal from macros COMPILER_VERSION_(MAJOR|MINOR|PATCH|TWEAK) to be
defined in CMake(C|CXX)CompilerId.(c|cpp) for each compiler.  Provide
conversion macros DEC() and HEX() to decode decimal or hex digits from
integer values.  Parse the version out of the compiler id binary along
with the other INFO values already present.

Store the result in variable CMAKE_<LANG>_COMPILER_VERSION in the format
"major[.minor[.patch[.tweak]]]".  Save the value persistently in
CMake(C|CXX)Compiler.cmake in the build tree.  Document the variable for
internal use since we do not set it everywhere yet.

Report the compiler version on the compiler id result line e.g.

  The C compiler identification is GNU 4.5.2

Report CMAKE_(C|CXX)_COMPILER_(ID|VERSION) in SystemInformation test.

Alex

In CMAKE_DETERMINE_COMPILER_ID_VENDOR() the compiler is called with various
arguments. In some cases, this can make the compiler hang and wait
forever for input (e.g. "as -v"). That's why add an timeout
so it terminates finally. 10 seconds should be more than enough,
this is the time it takes to startup the compiler, which is
usually quite fast.

Alex

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

Alex