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Disable unused local typedefs warning 

This triggers on gcc 4.8.4 for compile time asserts inside of functions

Fixes https://github.com/libsdl-org/SDL/issues/7732

Co-authored-by: Ozkan Sezer <sezeroz@gmail.com>
This commit is contained in:
Sam Lantinga 2023-05-23 17:23:30 -07:00 committed by Ozkan Sezer
parent 3f1fd5abff
commit 63b8af3558
3 changed files with 63 additions and 0 deletions
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5
CMakeLists.txt
View File

@ -641,6 +641,11 @@ if(USE_GCC OR USE_CLANG OR USE_INTELCC)
list(APPEND EXTRA_CFLAGS "-Wshadow")
endif()
check_c_compiler_flag(-Wunused-local-typedefs HAVE_GCC_WUNUSED_LOCAL_TYPEDEFS)
if(HAVE_GCC_WUNUSED_LOCAL_TYPEDEFS)
list(APPEND EXTRA_CFLAGS "-Wno-unused-local-typedefs")
endif()
if(APPLE)
cmake_push_check_state(RESET)
# FIXME: don't use deprecated declarations

36
configure vendored
View File

@ -23225,6 +23225,41 @@ printf "%s\n" "$need_gcc_Wno_multichar" >&6; }
fi
}
CheckUnusedLocalTypedefs()
{
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Wunused-local-typedefs option" >&5
printf %s "checking for GCC -Wunused-local-typedefs option... " >&6; }
have_gcc_unused_local_typedefs=no
save_CFLAGS="$CFLAGS"
CFLAGS="$save_CFLAGS -Wunused-local-typedefs"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int x = 0;
int
main (void)
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"
then :
have_gcc_unused_local_typedefs=yes
fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $have_gcc_unused_local_typedefs" >&5
printf "%s\n" "$have_gcc_unused_local_typedefs" >&6; }
CFLAGS="$save_CFLAGS"
if test x$have_gcc_unused_local_typedefs = xyes; then
EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-unused-local-typedefs"
fi
}
CheckWayland()
{
# Check whether --enable-video-wayland was given.
@ -28571,6 +28606,7 @@ printf "%s\n" "#define SDL_JOYSTICK_VIRTUAL 1" >>confdefs.h
}
CheckWarnAll
CheckUnusedLocalTypedefs
CheckNoStrictAliasing
CheckEventSignals

22
configure.ac
View File

@ -1674,6 +1674,27 @@ dnl Haiku headers use multicharacter constants all over the place. Ignore these
fi
}
dnl See if GCC's -Wunused-local-typedefs is supported and disable it
dnl because it triggers on gcc 4.8.4 for compile time asserts inside
dnl of functions.
CheckUnusedLocalTypedefs()
{
AC_MSG_CHECKING(for GCC -Wunused-local-typedefs option)
have_gcc_unused_local_typedefs=no
save_CFLAGS="$CFLAGS"
CFLAGS="$save_CFLAGS -Wunused-local-typedefs"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
int x = 0;
]],[])], [have_gcc_unused_local_typedefs=yes],[])
AC_MSG_RESULT($have_gcc_unused_local_typedefs)
CFLAGS="$save_CFLAGS"
if test x$have_gcc_unused_local_typedefs = xyes; then
EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-unused-local-typedefs"
fi
}
dnl Check for Wayland
CheckWayland()
{
@ -3746,6 +3767,7 @@ CheckVirtualJoystick()
dnl Do this on all platforms, before everything else (other things might want to override it).
CheckWarnAll
CheckUnusedLocalTypedefs
CheckNoStrictAliasing
dnl Do this for every platform, but for some it doesn't mean anything, but better to catch it here anyhow.