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-rw-r--r--cmake/UseSystemExtensions.cmake1
1 files changed, 0 insertions, 1 deletions
diff --git a/cmake/UseSystemExtensions.cmake b/cmake/UseSystemExtensions.cmake
index 5ef9b470..f3c9490f 100644
--- a/cmake/UseSystemExtensions.cmake
+++ b/cmake/UseSystemExtensions.cmake
@@ -64,7 +64,6 @@ check_c_source_compiles("
add_definitions(
-D_DARWIN_C_SOURCE
-D_POSIX_PTHREAD_SEMANTICS
- -D__STDC_WANT_IEC_60559_ATTRIBS_EXT__
-D__STDC_WANT_IEC_60559_BFP_EXT__
-D__STDC_WANT_IEC_60559_DFP_EXT__
-D__STDC_WANT_IEC_60559_FUNCS_EXT__