Check availability of constructor attribute and use it on Windows in favor of DllMain

1 files changed, 18 insertions, 10 deletions

diff --git a/src/glue.c b/src/glue.c
index e65ef56..7970679 100644
--- a/src/glue.c
+++ b/src/glue.c
@@ -44,7 +44,23 @@ static void internal_glue_deinit(void)
 static thread_once_t init_once = THREAD_ONCE_INIT;
 static thread_once_t deinit_once = THREAD_ONCE_INIT;
 
-#ifdef WIN32
+#ifndef HAVE_ATTRIBUTE_CONSTRUCTOR
+  #if defined(__llvm__) || defined(__GNUC__)
+    #define HAVE_ATTRIBUTE_CONSTRUCTOR
+  #endif
+#endif
+
+#ifdef HAVE_ATTRIBUTE_CONSTRUCTOR
+static void __attribute__((constructor)) limd_glue_initialize(void)
+{
+    thread_once(&init_once, internal_glue_init);
+}
+
+static void __attribute__((destructor)) limd_glue_deinitialize(void)
+{
+    thread_once(&deinit_once, internal_glue_deinit);
+}
+#elif defined(WIN32)
 BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
 {
     switch (dwReason) {
@@ -60,13 +76,5 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
     return 1;
 }
 #else
-static void __attribute__((constructor)) limd_glue_initialize(void)
-{
-    thread_once(&init_once, internal_glue_init);
-}
-
-static void __attribute__((destructor)) limd_glue_deinitialize(void)
-{
-    thread_once(&deinit_once, internal_glue_deinit);
-}
+#warning No compiler support for constructor/destructor attributes, some features might not be available.
 #endif