From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Stefan Weil" <sw@weilnetz.de>,
"Yonggang Luo" <luoyonggang@gmail.com>,
"Daniel P . Berrangé" <berrange@redhat.com>,
"Gerd Hoffmann" <kraxel@redhat.com>
Subject: [PULL 4/9] win32: Simplify gmtime_r detection not depends on if _POSIX_C_SOURCE are defined on msys2/mingw
Date: Wed, 14 Oct 2020 10:21:44 +0200 [thread overview]
Message-ID: <20201014082149.26853-5-kraxel@redhat.com> (raw)
In-Reply-To: <20201014082149.26853-1-kraxel@redhat.com>
From: Yonggang Luo <luoyonggang@gmail.com>
We remove the CONFIG_LOCALTIME_R detection option in configure, and move the check
existence of gmtime_r from configure into C header and source directly by using macro
`_POSIX_THREAD_SAFE_FUNCTIONS`.
Before this patch, the configure script are always assume the compiler doesn't define
_POSIX_C_SOURCE macro at all, but that's not true, because thirdparty library such
as ncursesw may define -D_POSIX_C_SOURCE in it's pkg-config file. And that C Flags will
added -D_POSIX_C_SOURCE into each QEMU_CFLAGS. And that's causing the following compiling error:
n file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
from ../softmmu/main.c:25:
C:/work/xemu/qemu/include/sysemu/os-win32.h:53:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls]
53 | struct tm *gmtime_r(const time_t *timep, struct tm *result);
| ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
from ../softmmu/main.c:25:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:284:36: note: previous definition of 'gmtime_r' was here
284 | __forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
| ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
from ../softmmu/main.c:25:
C:/work/xemu/qemu/include/sysemu/os-win32.h:55:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls]
55 | struct tm *localtime_r(const time_t *timep, struct tm *result);
| ^~~~~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
from ../softmmu/main.c:25:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:281:36: note: previous definition of 'localtime_r' was here
281 | __forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
| ^~~~~~~~~~~
Compiling C object libcommon.fa.p/hw_gpio_zaurus.c.obj
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
from ../hw/i2c/smbus_slave.c:16:
C:/work/xemu/qemu/include/sysemu/os-win32.h:53:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls]
53 | struct tm *gmtime_r(const time_t *timep, struct tm *result);
| ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
from ../hw/i2c/smbus_slave.c:16:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:284:36: note: previous definition of 'gmtime_r' was here
284 | __forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
| ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
from ../hw/i2c/smbus_slave.c:16:
C:/work/xemu/qemu/include/sysemu/os-win32.h:55:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls]
55 | struct tm *localtime_r(const time_t *timep, struct tm *result);
| ^~~~~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
from ../hw/i2c/smbus_slave.c:16:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:281:36: note: previous definition of 'localtime_r' was here
281 | __forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
| ^~~~~~~~~~~
Compiling C object libcommon.fa.p/hw_dma_xilinx_axidma.c.obj
After this patch, whenever ncursesw or other thirdparty libraries tried to define or not
define _POSIX_C_SOURCE, the source will building properly. Because now, we don't make any
assumption if _POSIX_C_SOURCE are defined. We solely relied on if the macro `_POSIX_THREAD_SAFE_FUNCTIONS`
are defined in msys2/mingw header.
The _POSIX_THREAD_SAFE_FUNCTIONS are defined in mingw header like this:
```
#if defined(_POSIX_C_SOURCE) && !defined(_POSIX_THREAD_SAFE_FUNCTIONS)
#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
#endif
#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
__forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
return localtime_s(_Tm, _Time) ? NULL : _Tm;
}
__forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
return gmtime_s(_Tm, _Time) ? NULL : _Tm;
}
__forceinline char *__CRTDECL ctime_r(const time_t *_Time, char *_Str) {
return ctime_s(_Str, 0x7fffffff, _Time) ? NULL : _Str;
}
__forceinline char *__CRTDECL asctime_r(const struct tm *_Tm, char * _Str) {
return asctime_s(_Str, 0x7fffffff, _Tm) ? NULL : _Str;
}
#endif
```
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20201012234348.1427-5-luoyonggang@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
configure | 34 ----------------------------------
include/sysemu/os-win32.h | 4 ++--
util/oslib-win32.c | 4 ++--
3 files changed, 4 insertions(+), 38 deletions(-)
diff --git a/configure b/configure
index 71a574f718fa..9a87685517ee 100755
--- a/configure
+++ b/configure
@@ -2386,37 +2386,6 @@ if test "$vhost_net" = ""; then
test "$vhost_kernel" = "yes" && vhost_net=yes
fi
-##########################################
-# MinGW / Mingw-w64 localtime_r/gmtime_r check
-
-if test "$mingw32" = "yes"; then
- # Some versions of MinGW / Mingw-w64 lack localtime_r
- # and gmtime_r entirely.
- #
- # Some versions of Mingw-w64 define a macro for
- # localtime_r/gmtime_r.
- #
- # Some versions of Mingw-w64 will define functions
- # for localtime_r/gmtime_r, but only if you have
- # _POSIX_THREAD_SAFE_FUNCTIONS defined. For fun
- # though, unistd.h and pthread.h both define
- # that for you.
- #
- # So this #undef localtime_r and #include <unistd.h>
- # are not in fact redundant.
-cat > $TMPC << EOF
-#include <unistd.h>
-#include <time.h>
-#undef localtime_r
-int main(void) { localtime_r(NULL, NULL); return 0; }
-EOF
- if compile_prog "" "" ; then
- localtime_r="yes"
- else
- localtime_r="no"
- fi
-fi
-
##########################################
# pkg-config probe
@@ -6610,9 +6579,6 @@ if [ "$bsd" = "yes" ] ; then
echo "CONFIG_BSD=y" >> $config_host_mak
fi
-if test "$localtime_r" = "yes" ; then
- echo "CONFIG_LOCALTIME_R=y" >> $config_host_mak
-fi
if test "$qom_cast_debug" = "yes" ; then
echo "CONFIG_QOM_CAST_DEBUG=y" >> $config_host_mak
fi
diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h
index d8978e28c03f..5346d51e890e 100644
--- a/include/sysemu/os-win32.h
+++ b/include/sysemu/os-win32.h
@@ -48,12 +48,12 @@
#define siglongjmp(env, val) longjmp(env, val)
/* Missing POSIX functions. Don't use MinGW-w64 macros. */
-#ifndef CONFIG_LOCALTIME_R
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
#undef gmtime_r
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#undef localtime_r
struct tm *localtime_r(const time_t *timep, struct tm *result);
-#endif /* CONFIG_LOCALTIME_R */
+#endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
static inline void os_setup_signal_handling(void) {}
static inline void os_daemonize(void) {}
diff --git a/util/oslib-win32.c b/util/oslib-win32.c
index 051afb217bc0..e99debfb8dd4 100644
--- a/util/oslib-win32.c
+++ b/util/oslib-win32.c
@@ -106,7 +106,7 @@ void qemu_anon_ram_free(void *ptr, size_t size)
}
}
-#ifndef CONFIG_LOCALTIME_R
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
/* FIXME: add proper locking */
struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
@@ -130,7 +130,7 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
}
return p;
}
-#endif /* CONFIG_LOCALTIME_R */
+#endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
static int socket_error(void)
{
--
2.27.0
next prev parent reply other threads:[~2020-10-14 8:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-14 8:21 [PULL 0/9] Ui 20201014 patches Gerd Hoffmann
2020-10-14 8:21 ` [PULL 1/9] qemu-edid: drop cast Gerd Hoffmann
2020-10-14 8:21 ` [PULL 2/9] curses: Fixes compiler error that complain don't have langinfo.h on msys2/mingw Gerd Hoffmann
2020-10-14 8:21 ` [PULL 3/9] curses: Fixes curses compiling errors Gerd Hoffmann
2020-10-14 8:21 ` Gerd Hoffmann [this message]
2020-10-14 8:21 ` [PULL 5/9] configure: Fixes ncursesw detection under msys2/mingw by convert them to meson Gerd Hoffmann
2020-10-14 18:22 ` Bruce Rogers
2020-10-14 19:16 ` 罗勇刚(Yonggang Luo)
2020-10-14 19:17 ` 罗勇刚(Yonggang Luo)
2020-10-14 20:10 ` Bruce Rogers
2020-10-14 8:21 ` [PULL 6/9] vnc-stubs: Allow -vnc none Gerd Hoffmann
2020-10-14 8:21 ` [PULL 7/9] SDL: enable OpenGL context creation Gerd Hoffmann
2020-10-14 8:21 ` [PULL 8/9] input-linux: Reset il->fd handler before closing it Gerd Hoffmann
2020-10-14 8:21 ` [PULL 9/9] ui: Fix default window_id value Gerd Hoffmann
2020-10-14 14:24 ` [PULL 0/9] Ui 20201014 patches Peter Maydell
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