diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib_proj.cmake | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/lib_proj.cmake b/src/lib_proj.cmake index abc9cc4b..59cb9572 100644 --- a/src/lib_proj.cmake +++ b/src/lib_proj.cmake @@ -303,7 +303,18 @@ source_group("CMake Files" FILES CMakeLists.txt) # Embed PROJ_LIB data files location add_definitions(-DPROJ_LIB="${CMAKE_INSTALL_PREFIX}/${DATADIR}") -add_definitions(-DTARGET_CLONES_FMA_ALLOWED) +# The gcc "target_clones" function attribute relies on an extension +# to the ELF standard. It must not be used on MinGW. +include(CheckCXXSourceCompiles) +set(CMAKE_REQUIRED_QUIET TRUE) +check_cxx_source_compiles([[ + __attribute__((target_clones("fma","default"))) + int clonable() { return 0; } + int main() { return clonable(); } +]] TARGET_CLONES_FMA_ALLOWED) +if(TARGET_CLONES_FMA_ALLOWED) + add_definitions(-DTARGET_CLONES_FMA_ALLOWED) +endif() ################################################# ## targets: libproj and proj_config.h |