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| author | Kai Pastor <dg0yt@darc.de> | 2020-07-07 19:55:05 +0200 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2020-07-08 13:32:47 +0200 |
| commit | 3dc7d7d1d1fcda60c637fb578e9d8a7140fb4cd4 (patch) | |
| tree | 3946911af34bf6dd7adee3bf888f0e20d732beea /src | |
| parent | aff43892f43dce14751e4f3be7e85d233793428b (diff) | |
| download | PROJ-3dc7d7d1d1fcda60c637fb578e9d8a7140fb4cd4.tar.gz PROJ-3dc7d7d1d1fcda60c637fb578e9d8a7140fb4cd4.zip | |
CMake build: Check "target_clones" before use
gcc's "target_clones" and "ifunc" function attributes rely on
extensions to the ELF standard. Using them on MinGW causes "error:
the call requires 'ifunc', which is not supported by this target".
Amends 5396b72.
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 |