[cmake] Use _GNU_SOURCE in order to detect asprintf

[simgrid.git] / tools / cmake / CompleteInFiles.cmake

diff --git a/tools/cmake/CompleteInFiles.cmake b/tools/cmake/CompleteInFiles.cmake
index 0a93421..4e76d1f 100644 (file)
--- a/tools/cmake/CompleteInFiles.cmake
+++ b/tools/cmake/CompleteInFiles.cmake
@@ -149,11 +149,11 @@ CHECK_LIBRARY_EXISTS(rt      clock_gettime           "" HAVE_POSIX_GETTIME)
 
 if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
   set(CMAKE_REQUIRED_DEFINITIONS "-D_XOPEN_SOURCE=700 -D_DARWIN_C_SOURCE")
-endif()
-
-if(MINGW)
+elseif(MINGW)
   add_definitions(-D__USE_MINGW_ANSI_STDIO=1)
   set(CMAKE_REQUIRED_DEFINITIONS "-D__USE_MINGW_ANSI_STDIO=1")
+else()
+  set(CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE")
 endif()
 
 CHECK_INCLUDE_FILES("time.h;sys/time.h" TIME_WITH_SYS_TIME)