mirror of
https://github.com/reactos/CMake.git
synced 2024-11-30 23:10:26 +00:00
f051814ed0
Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
72 lines
2.9 KiB
ReStructuredText
72 lines
2.9 KiB
ReStructuredText
try_compile
|
|
-----------
|
|
|
|
Try building some code.
|
|
|
|
::
|
|
|
|
try_compile(RESULT_VAR <bindir> <srcdir>
|
|
<projectName> [targetName] [CMAKE_FLAGS flags...]
|
|
[OUTPUT_VARIABLE <var>])
|
|
|
|
Try building a project. In this form, srcdir should contain a
|
|
complete CMake project with a CMakeLists.txt file and all sources.
|
|
The bindir and srcdir will not be deleted after this command is run.
|
|
Specify targetName to build a specific target instead of the 'all' or
|
|
'ALL_BUILD' target.
|
|
|
|
::
|
|
|
|
try_compile(RESULT_VAR <bindir> <srcfile|SOURCES srcfile...>
|
|
[CMAKE_FLAGS flags...]
|
|
[COMPILE_DEFINITIONS flags...]
|
|
[LINK_LIBRARIES libs...]
|
|
[OUTPUT_VARIABLE <var>]
|
|
[COPY_FILE <fileName> [COPY_FILE_ERROR <var>]])
|
|
|
|
Try building an executable from one or more source files. In this
|
|
form the user need only supply one or more source files that include a
|
|
definition for 'main'. CMake will create a CMakeLists.txt file to
|
|
build the source(s) as an executable. Specify COPY_FILE to get a copy
|
|
of the linked executable at the given fileName and optionally
|
|
COPY_FILE_ERROR to capture any error.
|
|
|
|
In this version all files in bindir/CMakeFiles/CMakeTmp will be
|
|
cleaned automatically. For debugging, --debug-trycompile can be
|
|
passed to cmake to avoid this clean. However, multiple sequential
|
|
try_compile operations reuse this single output directory. If you use
|
|
--debug-trycompile, you can only debug one try_compile call at a time.
|
|
The recommended procedure is to configure with cmake all the way
|
|
through once, then delete the cache entry associated with the
|
|
try_compile call of interest, and then re-run cmake again with
|
|
--debug-trycompile.
|
|
|
|
Some extra flags that can be included are, INCLUDE_DIRECTORIES,
|
|
LINK_DIRECTORIES, and LINK_LIBRARIES. COMPILE_DEFINITIONS are
|
|
-Ddefinition that will be passed to the compile line.
|
|
|
|
The srcfile signature also accepts a LINK_LIBRARIES argument which may
|
|
contain a list of libraries or IMPORTED targets which will be linked
|
|
to in the generated project. If LINK_LIBRARIES is specified as a
|
|
parameter to try_compile, then any LINK_LIBRARIES passed as
|
|
CMAKE_FLAGS will be ignored.
|
|
|
|
try_compile creates a CMakeList.txt file on the fly that looks like
|
|
this:
|
|
|
|
::
|
|
|
|
add_definitions( <expanded COMPILE_DEFINITIONS from calling cmake>)
|
|
include_directories(${INCLUDE_DIRECTORIES})
|
|
link_directories(${LINK_DIRECTORIES})
|
|
add_executable(cmTryCompileExec sources)
|
|
target_link_libraries(cmTryCompileExec ${LINK_LIBRARIES})
|
|
|
|
In both versions of the command, if OUTPUT_VARIABLE is specified, then
|
|
the output from the build process is stored in the given variable.
|
|
The success or failure of the try_compile, i.e. TRUE or FALSE
|
|
respectively, is returned in RESULT_VAR. CMAKE_FLAGS can be used to
|
|
pass -DVAR:TYPE=VALUE flags to the cmake that is run during the build.
|
|
Set variable CMAKE_TRY_COMPILE_CONFIGURATION to choose a build
|
|
configuration.
|