1 files changed, 15 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6dacbc3..302b692 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,16 @@ include(CheckCSourceRuns)
 
 check_c_source_runs(
   "
+  __attribute__((weak)) int foo();
+  int main() { return 0; }
+  "
+  KIT_HAVE_FUNC_ATTRIBUTE_WEAK
+)
+
+set(CMAKE_REQUIRED_LIBRARIES "pthread")
+check_c_source_runs(
+  "
+  #define _GNU_SOURCE
   #include <pthread.h>
   int main() {
     pthread_mutexattr_t attr;
@@ -46,6 +56,7 @@ check_c_source_runs(
   "
   KIT_HAVE_PTHREAD_MUTEXATTR_SETTYPE
 )
+set(CMAKE_REQUIRED_LIBRARIES "")
 
 check_c_source_runs(
   "
@@ -87,6 +98,10 @@ if(NOT KIT_HAVE_MALLOC)
   set(KIT_DISABLE_SYSTEM_MALLOC ON)
 endif()
 
+if(KIT_HAVE_FUNC_ATTRIBUTE_WEAK)
+  target_compile_definitions(kit PUBLIC KIT_HAVE_FUNC_ATTRIBUTE_WEAK)
+endif()
+
 if(KIT_HAVE_PTHREAD_MUTEXATTR_SETTYPE)
   target_compile_definitions(kit PUBLIC KIT_HAVE_PTHREAD_MUTEXATTR_SETTYPE)
 endif()