From d64a7a34166a470e6fa93a9f93e49c6ab23a7e62 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Mon, 13 Sep 2021 18:50:01 +0200
Subject: Check availability of constructor attribute and use it on Windows in
 favor of DllMain

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

(limited to 'src/idevice.c')

diff --git a/src/idevice.c b/src/idevice.c
index 4545bfa..6a03c5e 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -174,7 +174,23 @@ static void internal_idevice_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)) libimobiledevice_initialize(void)
+{
+	thread_once(&init_once, internal_idevice_init);
+}
+
+static void __attribute__((destructor)) libimobiledevice_deinitialize(void)
+{
+	thread_once(&deinit_once, internal_idevice_deinit);
+}
+#elif defined(WIN32)
 BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
 {
 	switch (dwReason) {
@@ -190,15 +206,7 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
 	return 1;
 }
 #else
-static void __attribute__((constructor)) libimobiledevice_initialize(void)
-{
-	thread_once(&init_once, internal_idevice_init);
-}
-
-static void __attribute__((destructor)) libimobiledevice_deinitialize(void)
-{
-	thread_once(&deinit_once, internal_idevice_deinit);
-}
+#warning No compiler support for constructor/destructor attributes, some features might not be available.
 #endif
 
 static idevice_event_cb_t event_cb = NULL;
-- 
cgit v1.1-32-gdbae