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ce9d83be80
CMAKE_SOURCE_DIR corresponds to the top project's source directory. CMAKE_BINARY_DIR corresponds to the top project's binary directory. The usage of these variables doesn't cause any problems when Opus is built as a standalone project. This is not the case when Opus is added as submodule: the variables are set by the project that calls "add_subdirectory()". The fix consists in using PROJECT_SOURCE_DIR and PROJECT_BINARY_DIR, which always refer to the current project. Signed-off-by: Mark Harris <mark.hsj@gmail.com>
39 lines
1 KiB
CMake
39 lines
1 KiB
CMake
# - Compile and run code to check for C features
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#
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# This functions compiles a source file under the `cmake` folder
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# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
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# environment
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#
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# c_feature_check(<FLAG> [<VARIANT>])
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#
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# - Example
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#
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# include(CFeatureCheck)
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# c_feature_check(VLA)
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if(__c_feature_check)
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return()
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endif()
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set(__c_feature_check INCLUDED)
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function(c_feature_check FILE)
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string(TOLOWER ${FILE} FILE)
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string(TOUPPER ${FILE} VAR)
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string(TOUPPER "${VAR}_SUPPORTED" FEATURE)
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if (DEFINED ${VAR}_SUPPORTED)
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set(${VAR}_SUPPORTED 1 PARENT_SCOPE)
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return()
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endif()
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if (NOT DEFINED COMPILE_${FEATURE})
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message(STATUS "Performing Test ${FEATURE}")
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try_compile(COMPILE_${FEATURE} ${PROJECT_BINARY_DIR} ${PROJECT_SOURCE_DIR}/cmake/${FILE}.c)
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endif()
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if(COMPILE_${FEATURE})
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message(STATUS "Performing Test ${FEATURE} -- success")
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set(${VAR}_SUPPORTED 1 PARENT_SCOPE)
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else()
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message(STATUS "Performing Test ${FEATURE} -- failed to compile")
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endif()
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endfunction()
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