From d73b3ebf3b914fc1ebc32025626a50786e99438b Mon Sep 17 00:00:00 2001
From: Mitya Selivanov <automainint@guattari.tech>
Date: Sun, 1 Jan 2023 18:03:59 +0100
Subject: Fix mutexattr checks

---
 CMakeLists.txt            | 15 +++++++++++++++
 source/kit/thread.posix.c |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

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()
diff --git a/source/kit/thread.posix.c b/source/kit/thread.posix.c
index 4d21abb..52f52ad 100644
--- a/source/kit/thread.posix.c
+++ b/source/kit/thread.posix.c
@@ -114,7 +114,7 @@ void mtx_destroy(mtx_t *mtx) {
  * Thus the linker will be happy and things don't clash when building
  * with -O1 or greater.
  */
-#    if defined(HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__)
+#    if defined(KIT_HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__)
 __attribute__((weak)) int pthread_mutexattr_init(
     pthread_mutexattr_t *attr);
 
-- 
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