When debugging some patches on Windows, I discovered that nothing printed
to stderr ever appears on the console. Eventually I discovered that if I
build with --disable-sdl, then stderr appears just fine.
Looking at the code in vl.c I see a hack for SDL introduced in
commit 59a36a2f6728081050afc6ec97d0018467999f79
Author: Stefan Weil <w...@mail.berlios.de>
Date: Thu Jun 18 20:11:03 2009 +0200
Win32: Fix compilation with SDL.
If I mostly kill the hack from vl.c, and just leave a plain '#undef main'
then I get working console stderr once again.
eg I applied
diff --git a/vl.c b/vl.c
index 0adbbd6..8e1481b 100644
--- a/vl.c
+++ b/vl.c
@@ -39,16 +39,8 @@
#endif
#ifdef CONFIG_SDL
-#if defined(__APPLE__) || defined(main)
#include <SDL.h>
-int qemu_main(int argc, char **argv, char **envp);
-int main(int argc, char **argv)
-{
- return qemu_main(argc, argv, NULL);
-}
#undef main
-#define main qemu_main
-#endif
#endif /* CONFIG_SDL */
#ifdef CONFIG_COCOA
FWIW, I'm building on Fedora 22 using
# ./configure --cross-prefix=i686-w64-mingw32- \
--prefix=$HOME/usr/qemu-git-win32 \
--target-list=x86_64-softmmu \
--disable-libusb --disable-usb-redir
Which has
mingw32-SDL-1.2.15-5.fc21.noarch
To test I just run
C:> qemu-system-x86_64 -object foobar
qemu-system-x86_64: -object foobar: Parameter 'id' is missing
to get it to print an error about bad -object arg. The message
never appears unless I apply that patch above, though I lack any
explanation as to why this is happening, aside from "SDL black magic"
Regards,
Daniel
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