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author | Kitware Robot <kwrobot@kitware.com> | 2013-10-15 15:17:36 (GMT) |
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committer | Brad King <brad.king@kitware.com> | 2013-10-15 18:12:03 (GMT) |
commit | f051814ed0e63badbfd68049354f36259dbf4b49 (patch) | |
tree | f4e6f885f86c882d723a7dd53d2b702d0c7fdffb /Help/command/try_compile.rst | |
parent | e94958e99c4dec26c86ce8b76d744c04ba960675 (diff) | |
download | CMake-f051814ed0e63badbfd68049354f36259dbf4b49.zip CMake-f051814ed0e63badbfd68049354f36259dbf4b49.tar.gz CMake-f051814ed0e63badbfd68049354f36259dbf4b49.tar.bz2 |
Convert builtin help to reStructuredText source files
Run the convert-help.bash script to convert documentation:
./convert-help.bash "/path/to/CMake-build/bin"
Then remove it.
Diffstat (limited to 'Help/command/try_compile.rst')
-rw-r--r-- | Help/command/try_compile.rst | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/Help/command/try_compile.rst b/Help/command/try_compile.rst new file mode 100644 index 0000000..8ed3cf4 --- /dev/null +++ b/Help/command/try_compile.rst @@ -0,0 +1,71 @@ +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. |