From 7cf2af987f9a2379b28f5d3426e9dc6633fa29a5 Mon Sep 17 00:00:00 2001
From: Christoph Reiter <reiter.christoph@gmail.com>
Date: Sat, 6 Jan 2018 22:04:23 +0100
Subject: [PATCH] win32: Make the static build work with MinGW when posix
 threads are used

MinGW does not support the use of DllMain() for static builds, but that
is currently always used on Windows, partly because it is needed for
handling win32 threads and because there are problems with MSVC
optimizing constructors away (see 7a29771a743a8b5337).

To make the static build at least work in case mingw+posix threads are used,
switch to using constructors for that. The g_clock_win32_init() call is
moved into glib_init(), so it's also called in that case.

If mingw+static+win32 threads are used abort the build early and print
an error message.

https://bugzilla.gnome.org/show_bug.cgi?id=792297
---
 glib/glib-init.c | 15 ++++++++++++---
 gobject/gtype.c  |  2 +-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/glib/glib-init.c b/glib/glib-init.c
index ed800dca1..4866b5239 100644
--- a/glib/glib-init.c
+++ b/glib/glib-init.c
@@ -334,6 +334,9 @@ glib_init (void)

   glib_inited = TRUE;

+#ifdef G_OS_WIN32
+  g_clock_win32_init ();
+#endif
   g_messages_prefixed_init ();
   g_debug_init ();
   g_quark_init ();
@@ -341,13 +344,20 @@ glib_init (void)
 }

 #if defined (G_OS_WIN32)
+HMODULE glib_dll;
+#endif
+
+#if defined(__MINGW32__) && defined(GLIB_STATIC_COMPILATION) && !defined(THREADS_POSIX)
+/* MinGW static builds do not work with DllMain, but win32 threads need it atm */
+#error "Static build under MinGW only supported when build with posix threads"
+#endif
+
+#if defined (G_OS_WIN32) && (!defined(__MINGW32__) || defined(DLL_EXPORT))

 BOOL WINAPI DllMain (HINSTANCE hinstDLL,
                      DWORD     fdwReason,
                      LPVOID    lpvReserved);

-HMODULE glib_dll;
-
 BOOL WINAPI
 DllMain (HINSTANCE hinstDLL,
          DWORD     fdwReason,
@@ -358,7 +368,6 @@ DllMain (HINSTANCE hinstDLL,
     case DLL_PROCESS_ATTACH:
       glib_dll = hinstDLL;
       g_crash_handler_win32_init ();
-      g_clock_win32_init ();
 #ifdef THREADS_WIN32
       g_thread_win32_init ();
 #endif
diff --git a/gobject/gtype.c b/gobject/gtype.c
index 425c6195d..91cd7e2cf 100644
--- a/gobject/gtype.c
+++ b/gobject/gtype.c
@@ -4510,7 +4510,7 @@ gobject_init (void)
   _g_signal_init ();
 }

-#if defined (G_OS_WIN32)
+#if defined (G_OS_WIN32) && (!defined(__MINGW32__) || defined(DLL_EXPORT))

 BOOL WINAPI DllMain (HINSTANCE hinstDLL,
                      DWORD     fdwReason,
-- 
2.22.0