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Date: Wed, 16 Sep 2020 01:12:12 +0800 Message-Id: <20200915171234.236-5-luoyonggang@gmail.com> X-Mailer: git-send-email 2.28.0.windows.1 In-Reply-To: <20200915171234.236-1-luoyonggang@gmail.com> References: <20200915171234.236-1-luoyonggang@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::641; envelope-from=luoyonggang@gmail.com; helo=mail-pl1-x641.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Ed Maste , Michael Roth , qemu-block@nongnu.org, Stefan Weil , Xie Changlong , Richard Henderson , Markus Armbruster , Max Reitz , Yonggang Luo , Gerd Hoffmann , Wen Congyang , Paolo Bonzini , Li-Wen Hsu , Peter Lieven Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" First, this reduce the size of configure, configure are tending to removal = in future, and this didn't introduce any new feature or remove any exist feature. Second, the current localtime_r detection are conflict with ncursesw detect= ion in mingw, when ncursesw detected, it will provide the following compile flags pkg-config --cflags ncursesw -D_XOPEN_SOURCE=3D600 -D_POSIX_C_SOURCE=3D199506L -IC:/CI-Tools/msys64/ming= w64/include/ncursesw And the compile flag _POSIX_C_SOURCE will always cause _POSIX_THREAD_SAFE_F= UNCTIONS to be defined, in new version of mingw, that's will cause localtime_r to be de= fined. But the configure script didn't provide _POSIX_C_SOURCE macro, and that's w= ill result localtime_r not detected because localtime_r are defined in forceinline man= ner. And finally cause conflict between QEMU defined localtime_r struct tm *localtime_r(const time_t *timep, struct tm *result); with mingw defined localtime_r ``` #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 ``` So I suggest remove this configure script, and restrict msys2/mingw version= to easy to maintain. And use _POSIX_THREAD_SAFE_FUNCTIONS to guard the localtime_r and counterpa= rt functions Signed-off-by: Yonggang Luo --- configure | 34 ---------------------------------- include/sysemu/os-win32.h | 4 ++-- util/oslib-win32.c | 2 +- 3 files changed, 3 insertions(+), 37 deletions(-) diff --git a/configure b/configure index dc4b7a2e55..bac48b5b49 100755 --- a/configure +++ b/configure @@ -2496,37 +2496,6 @@ if test "$vhost_net" =3D ""; then test "$vhost_kernel" =3D "yes" && vhost_net=3Dyes fi =20 -########################################## -# MinGW / Mingw-w64 localtime_r/gmtime_r check - -if test "$mingw32" =3D "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 - # are not in fact redundant. -cat > $TMPC << EOF -#include -#include -#undef localtime_r -int main(void) { localtime_r(NULL, NULL); return 0; } -EOF - if compile_prog "" "" ; then - localtime_r=3D"yes" - else - localtime_r=3D"no" - fi -fi - ########################################## # pkg-config probe =20 @@ -7088,9 +7057,6 @@ if [ "$bsd" =3D "yes" ] ; then echo "CONFIG_BSD=3Dy" >> $config_host_mak fi =20 -if test "$localtime_r" =3D "yes" ; then - echo "CONFIG_LOCALTIME_R=3Dy" >> $config_host_mak -fi if test "$qom_cast_debug" =3D "yes" ; then echo "CONFIG_QOM_CAST_DEBUG=3Dy" >> $config_host_mak fi diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h index d8978e28c0..3ac8a53bac 100644 --- a/include/sysemu/os-win32.h +++ b/include/sysemu/os-win32.h @@ -48,12 +48,12 @@ #define siglongjmp(env, val) longjmp(env, val) =20 /* 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 =20 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 c654dafd93..f2fa9a3549 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) } } =20 -#ifndef CONFIG_LOCALTIME_R +#ifndef _POSIX_THREAD_SAFE_FUNCTIONS /* FIXME: add proper locking */ struct tm *gmtime_r(const time_t *timep, struct tm *result) { --=20 2.28.0.windows.1