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Diffstat (limited to 'cmake/CFeatureCheck.cmake')
| -rw-r--r-- | cmake/CFeatureCheck.cmake | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/cmake/CFeatureCheck.cmake b/cmake/CFeatureCheck.cmake new file mode 100644 index 00000000..08828f58 --- /dev/null +++ b/cmake/CFeatureCheck.cmake @@ -0,0 +1,39 @@ +# - Compile and run code to check for C features +# +# This functions compiles a source file under the `cmake` folder +# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake +# environment +# +# c_feature_check(<FLAG> [<VARIANT>]) +# +# - Example +# +# include(CFeatureCheck) +# c_feature_check(VLA) + +if(__c_feature_check) + return() +endif() +set(__c_feature_check INCLUDED) + +function(c_feature_check FILE) + string(TOLOWER ${FILE} FILE) + string(TOUPPER ${FILE} VAR) + string(TOUPPER "${VAR}_SUPPORTED" FEATURE) + if (DEFINED ${VAR}_SUPPORTED) + set(${VAR}_SUPPORTED 1 PARENT_SCOPE) + return() + endif() + + if (NOT DEFINED COMPILE_${FEATURE}) + message(STATUS "Performing Test ${FEATURE}") + try_compile(COMPILE_${FEATURE} ${PROJECT_BINARY_DIR} ${PROJECT_SOURCE_DIR}/cmake/${FILE}.c) + endif() + + if(COMPILE_${FEATURE}) + message(STATUS "Performing Test ${FEATURE} -- success") + set(${VAR}_SUPPORTED 1 PARENT_SCOPE) + else() + message(STATUS "Performing Test ${FEATURE} -- failed to compile") + endif() +endfunction() |