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look for clock_gettime() in libc first, then in librt if not found.

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This commit is contained in:
Ozkan Sezer 2023-02-13 21:50:40 +03:00
parent 634705851d
commit 22df572979
3 changed files with 58 additions and 60 deletions
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10
CMakeLists.txt
View file

@ -1617,14 +1617,14 @@ elseif(UNIX AND NOT APPLE AND NOT RISCOS AND NOT HAIKU)
CheckPTHREAD()
if(SDL_CLOCK_GETTIME)
check_library_exists(rt clock_gettime "" FOUND_CLOCK_GETTIME_LIBRT)
if(FOUND_CLOCK_GETTIME_LIBRT)
list(APPEND EXTRA_LIBS rt)
check_library_exists(c clock_gettime "" FOUND_CLOCK_GETTIME_LIBC)
if(FOUND_CLOCK_GETTIME_LIBC)
set(HAVE_CLOCK_GETTIME 1)
else()
check_library_exists(c clock_gettime "" FOUND_CLOCK_GETTIME_LIBC)
if(FOUND_CLOCK_GETTIME_LIBC)
check_library_exists(rt clock_gettime "" FOUND_CLOCK_GETTIME_LIBRT)
if(FOUND_CLOCK_GETTIME_LIBRT)
set(HAVE_CLOCK_GETTIME 1)
list(APPEND EXTRA_LIBS rt)
endif()
endif()
endif()

97
configure vendored
View file

@ -28404,53 +28404,7 @@ else $as_nop
fi
if test x$enable_clock_gettime = xyes; then
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for clock_gettime in -lrt" >&5
printf %s "checking for clock_gettime in -lrt... " >&6; }
if test ${ac_cv_lib_rt_clock_gettime+y}
then :
printf %s "(cached) " >&6
else $as_nop
ac_check_lib_save_LIBS=$LIBS
LIBS="-lrt $LIBS"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
/* Override any GCC internal prototype to avoid an error.
Use char because int might match the return type of a GCC
builtin and then its argument prototype would still apply. */
char clock_gettime ();
int
main (void)
{
return clock_gettime ();
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"
then :
ac_cv_lib_rt_clock_gettime=yes
else $as_nop
ac_cv_lib_rt_clock_gettime=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
LIBS=$ac_check_lib_save_LIBS
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_clock_gettime" >&5
printf "%s\n" "$ac_cv_lib_rt_clock_gettime" >&6; }
if test "x$ac_cv_lib_rt_clock_gettime" = xyes
then :
have_clock_gettime=yes
fi
if test x$have_clock_gettime = xyes; then
printf "%s\n" "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lrt"
else
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for clock_gettime in -lc" >&5
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for clock_gettime in -lc" >&5
printf %s "checking for clock_gettime in -lc... " >&6; }
if test ${ac_cv_lib_c_clock_gettime+y}
then :
@ -28490,11 +28444,56 @@ then :
have_clock_gettime=yes
fi
if test x$have_clock_gettime = xyes; then
if test x$have_clock_gettime = xyes; then
printf "%s\n" "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
else
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for clock_gettime in -lrt" >&5
printf %s "checking for clock_gettime in -lrt... " >&6; }
if test ${ac_cv_lib_rt_clock_gettime+y}
then :
printf %s "(cached) " >&6
else $as_nop
ac_check_lib_save_LIBS=$LIBS
LIBS="-lrt $LIBS"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
/* Override any GCC internal prototype to avoid an error.
Use char because int might match the return type of a GCC
builtin and then its argument prototype would still apply. */
char clock_gettime ();
int
main (void)
{
return clock_gettime ();
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"
then :
ac_cv_lib_rt_clock_gettime=yes
else $as_nop
ac_cv_lib_rt_clock_gettime=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam \
conftest$ac_exeext conftest.$ac_ext
LIBS=$ac_check_lib_save_LIBS
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_rt_clock_gettime" >&5
printf "%s\n" "$ac_cv_lib_rt_clock_gettime" >&6; }
if test "x$ac_cv_lib_rt_clock_gettime" = xyes
then :
have_clock_gettime=yes
fi
if test x$have_clock_gettime = xyes; then
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lrt"
printf "%s\n" "#define HAVE_CLOCK_GETTIME 1" >>confdefs.h
EXTRA_LDFLAGS="$EXTRA_LDFLAGS"
fi
fi
fi

11
configure.ac
View file

@ -3681,15 +3681,14 @@ CheckClockGettime()
[AS_HELP_STRING([--enable-clock_gettime], [use clock_gettime() instead of gettimeofday() on UNIX [default=yes]])],
, enable_clock_gettime=yes)
if test x$enable_clock_gettime = xyes; then
AC_CHECK_LIB(rt, clock_gettime, have_clock_gettime=yes)
AC_CHECK_LIB(c, clock_gettime, have_clock_gettime=yes)
if test x$have_clock_gettime = xyes; then
AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [ ])
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lrt"
AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [ ])
else
AC_CHECK_LIB(c, clock_gettime, have_clock_gettime=yes)
AC_CHECK_LIB(rt, clock_gettime, have_clock_gettime=yes)
if test x$have_clock_gettime = xyes; then
AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [ ])
EXTRA_LDFLAGS="$EXTRA_LDFLAGS"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lrt"
AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [ ])
fi
fi
fi