From 042c1a264a7e853fcdfc9c6a1b0090d56fc3ff81 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Mon, 13 Sep 2021 18:38:56 +0200
Subject: Check availability of constructor attribute and use it on Windows in
 favor of DllMain

---
 src/glue.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

(limited to 'src/glue.c')

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
-- 
cgit v1.1-32-gdbae