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Re: [Qemu-devel] [PATCH for-3.1 v2] build: qga: add macro to force use o
From: |
Daniel P . Berrangé |
Subject: |
Re: [Qemu-devel] [PATCH for-3.1 v2] build: qga: add macro to force use of native mingw32 assert() |
Date: |
Wed, 14 Nov 2018 16:54:56 +0000 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
On Wed, Nov 14, 2018 at 10:44:38AM -0600, Michael Roth wrote:
> When building qemu-ga for w32 with VSS support, some parts of qemu-ga
> are not linked against glib, specifically the C++ bits used to
> create the VSS provider DLL. With 3ebee3b191e, we now define assert()
> as g_assert() for all mingw32 builds via osdep.h, which results in the
> following build breakage:
>
> x86_64-w64-mingw32-g++ -o qga/vss-win32/qga-vss.dll
> qga/vss-win32/requester.o qga/vss-win32/provider.o qga/vss-win32/install.o
> /home/mdroth/w/qemu4.git/qga/vss-win32/qga-vss.def -shared
> -Wl,--add-stdcall-alias,--enable-stdcall-fixup -lole32 -loleaut32 -lshlwapi
> -luuid -static
> qga/vss-win32/requester.o: In function `requester_freeze':
> /home/mdroth/w/qemu4.git/qga/vss-win32/requester.cpp:284: undefined
> reference to `g_assertion_message_expr'
> qga/vss-win32/requester.o: In function `requester_thaw':
> /home/mdroth/w/qemu4.git/qga/vss-win32/requester.cpp:508: undefined
> reference to `g_assertion_message_expr'
> /home/mdroth/w/qemu4.git/qga/vss-win32/requester.cpp:509: undefined
> reference to `g_assertion_message_expr'
> collect2: error: ld returned 1 exit status
> make: *** [/home/mdroth/w/qemu4.git/qga/vss-win32/Makefile.objs:10:
> qga/vss-win32/qga-vss.dll] Error 1
> make: *** Waiting for unfinished jobs....
>
> Fix this by introducing a USE_NATIVE_MINGW32_ASSERT macro that can
> be defined prior to inclusion of osdep.h for build targets that
> don't link against glib.
Why doesn't it link to glib and can that be fixed ?
Glib is considered a mandatory dependancy on anything in QEMU that
uses osdep.h, since that header pulls in the glib.h header unconditionally.
> Cc: Richard Henderson <address@hidden>
> Cc: Philippe Mathieu-Daudé <address@hidden>
> Signed-off-by: Michael Roth <address@hidden>
> ---
> v2:
> * define USE_NATIVE_MINGW32_ASSERT via build recipe and avoid moving
> #include's before osdep.h (Philippe)
> ---
> include/qemu/osdep.h | 2 +-
> qga/vss-win32/Makefile.objs | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
> index 3bf48bcdec..59364bfeb0 100644
> --- a/include/qemu/osdep.h
> +++ b/include/qemu/osdep.h
> @@ -129,7 +129,7 @@ extern int daemon(int, int);
> * code that is unreachable when features are disabled.
> * All supported versions of Glib's g_assert() satisfy this requirement.
> */
> -#ifdef __MINGW32__
> +#if defined(__MINGW32__) && !defined(USE_NATIVE_MINGW32_ASSERT)
I don't think we should have these kind of hacks.
Either make vss-win32 link to glib, or stop it importing
osdep.h entirely if it really must be built completely
standalone from normal QEMU dependancies.
> #undef assert
> #define assert(x) g_assert(x)
> #endif
> diff --git a/qga/vss-win32/Makefile.objs b/qga/vss-win32/Makefile.objs
> index 23d08da225..5773bfd868 100644
> --- a/qga/vss-win32/Makefile.objs
> +++ b/qga/vss-win32/Makefile.objs
> @@ -3,7 +3,7 @@
> qga-vss-dll-obj-y += requester.o provider.o install.o
>
> obj-qga-vss-dll-obj-y = $(addprefix $(obj)/, $(qga-vss-dll-obj-y))
> -$(obj-qga-vss-dll-obj-y): QEMU_CXXFLAGS = $(filter-out -Wstrict-prototypes
> -Wmissing-prototypes -Wnested-externs -Wold-style-declaration
> -Wold-style-definition -Wredundant-decls -fstack-protector-all
> -fstack-protector-strong, $(QEMU_CFLAGS)) -Wno-unknown-pragmas
> -Wno-delete-non-virtual-dtor
> +$(obj-qga-vss-dll-obj-y): QEMU_CXXFLAGS = $(filter-out -Wstrict-prototypes
> -Wmissing-prototypes -Wnested-externs -Wold-style-declaration
> -Wold-style-definition -Wredundant-decls -fstack-protector-all
> -fstack-protector-strong, $(QEMU_CFLAGS)) -Wno-unknown-pragmas
> -Wno-delete-non-virtual-dtor -DUSE_NATIVE_MINGW32_ASSERT
>
> $(obj)/qga-vss.dll: LDFLAGS = -shared
> -Wl,--add-stdcall-alias,--enable-stdcall-fixup -lole32 -loleaut32 -lshlwapi
> -luuid -static
> $(obj)/qga-vss.dll: $(obj-qga-vss-dll-obj-y) $(SRC_PATH)/$(obj)/qga-vss.def
> --
> 2.17.1
>
>
Regards,
Daniel
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