autotools: add --enable-werror option
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diff --git a/configure b/configure
index f3390df..cf415a5 100755
--- a/configure
+++ b/configure
@@ -902,6 +902,7 @@ enable_libsamplerate
enable_libsamplerate_shared
enable_arm_simd
enable_arm_neon
+enable_werror
enable_video_wayland
enable_video_wayland_qt_touch
enable_wayland_shared
@@ -1703,6 +1704,7 @@ Optional Features:
dynamically load libsamplerate [default=yes]
--enable-arm-simd use SIMD assembly blitters on ARM [default=no]
--enable-arm-neon use NEON assembly blitters on ARM [default=no]
+ --enable-werror treat warnings as errors [default=no]
--enable-video-wayland use Wayland video driver [default=yes]
--enable-video-wayland-qt-touch
QtWayland server support for Wayland video driver
@@ -22952,6 +22954,86 @@ printf "%s\n" "$have_gcc_preferred_stack_boundary" >&6; }
fi
}
+CheckWerror()
+{
+ # Check whether --enable-werror was given.
+if test ${enable_werror+y}
+then :
+ enableval=$enable_werror; enable_werror=$enableval
+else $as_nop
+ enable_werror=no
+fi
+
+ if test x$enable_werror = xyes; then
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Werror option" >&5
+printf %s "checking for GCC -Werror option... " >&6; }
+ have_gcc_werror=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Werror"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ int x = 0;
+
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ have_gcc_werror=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $have_gcc_werror" >&5
+printf "%s\n" "$have_gcc_werror" >&6; }
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_werror = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Werror"
+ fi
+ fi
+}
+
+CheckNoErrorDeprecatedDeclarationsWerror()
+{
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Werror option" >&5
+printf %s "checking for GCC -Werror option... " >&6; }
+ have_gcc_no_werror_deprecated_declarations=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Wno-error=deprecated-declarations"
+ 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_no_werror_deprecated_declarations=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $have_gcc_werror" >&5
+printf "%s\n" "$have_gcc_werror" >&6; }
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_no_werror_deprecated_declarations = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-error=deprecated-declarations"
+ fi
+}
+
CheckDeclarationAfterStatement()
{
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Wdeclaration-after-statement option" >&5
@@ -28315,6 +28397,7 @@ printf "%s\n" "#define SDL_VIDEO_DRIVER_ANDROID 1" >>confdefs.h
;;
esac
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -28582,6 +28665,7 @@ printf "%s\n" "#define SDL_TIMER_UNIX 1" >>confdefs.h
have_loadso=yes
fi
CheckGDwarf4
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -28905,6 +28989,8 @@ printf "%s\n" "#define SDL_FILESYSTEM_HAIKU 1" >>confdefs.h
ARCH=ios
CheckVisibilityHidden
+ CheckWerror
+ CheckNoErrorDeprecatedDeclarationsWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -29042,6 +29128,8 @@ printf "%s\n" "#define SDL_VIDEO_RENDER_OGL_ES2 1" >>confdefs.h
CheckObjectiveCARC
CheckVisibilityHidden
+ CheckWerror
+ CheckNoErrorDeprecatedDeclarationsWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -29187,6 +29275,7 @@ printf "%s\n" "#define SDL_AUDIO_DRIVER_EMSCRIPTEN 1" >>confdefs.h
fi
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -29246,6 +29335,7 @@ printf "%s\n" "#define SDL_TIMER_UNIX 1" >>confdefs.h
*-*-riscos*)
ARCH=riscos
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -29302,6 +29392,7 @@ printf "%s\n" "#define SDL_TIMER_UNIX 1" >>confdefs.h
enable_static=no # disable static builds
EXTRA_CFLAGS="$EXTRA_CFLAGS -DBUILD_SDL -DOS2EMX_PLAIN_CHAR"
CheckOS2
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckDiskAudio
diff --git a/configure.ac b/configure.ac
index f8bc77d..34942b0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1595,6 +1595,49 @@ CheckStackBoundary()
fi
}
+dnl See if GCC's -Werror is supported.
+CheckWerror()
+{
+ AC_ARG_ENABLE(werror,
+[AS_HELP_STRING([--enable-werror], [treat warnings as errors [default=no]])],
+ enable_werror=$enableval, enable_werror=no)
+ if test x$enable_werror = xyes; then
+ AC_MSG_CHECKING(for GCC -Werror option)
+ have_gcc_werror=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Werror"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ int x = 0;
+ ]],[])], [have_gcc_werror=yes],[])
+ AC_MSG_RESULT($have_gcc_werror)
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_werror = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Werror"
+ fi
+ fi
+}
+
+dnl See if GCC's -Wno-error=deprecated-declarations is supported.
+CheckNoErrorDeprecatedDeclarationsWerror()
+{
+ AC_MSG_CHECKING(for GCC -Werror option)
+ have_gcc_no_werror_deprecated_declarations=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Wno-error=deprecated-declarations"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ int x = 0;
+ ]],[])], [have_gcc_no_werror_deprecated_declarations=yes],[])
+ AC_MSG_RESULT($have_gcc_werror)
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_no_werror_deprecated_declarations = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-error=deprecated-declarations"
+ fi
+}
+
dnl See if GCC's -Wdeclaration-after-statement is supported.
dnl This lets us catch things that would fail on a C89 compiler when using
dnl a modern GCC.
@@ -3761,6 +3804,7 @@ case "$host" in
;;
esac
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -3994,6 +4038,7 @@ case "$host" in
have_loadso=yes
fi
CheckGDwarf4
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -4218,6 +4263,8 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works. --ryan.
ARCH=ios
CheckVisibilityHidden
+ CheckWerror
+ CheckNoErrorDeprecatedDeclarationsWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -4333,6 +4380,8 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works. --ryan.
CheckObjectiveCARC
CheckVisibilityHidden
+ CheckWerror
+ CheckNoErrorDeprecatedDeclarationsWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -4458,6 +4507,7 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works. --ryan.
fi
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -4509,6 +4559,7 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works. --ryan.
*-*-riscos*)
ARCH=riscos
CheckVisibilityHidden
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckOffscreenVideo
@@ -4559,6 +4610,7 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works. --ryan.
enable_static=no # disable static builds
EXTRA_CFLAGS="$EXTRA_CFLAGS -DBUILD_SDL -DOS2EMX_PLAIN_CHAR"
CheckOS2
+ CheckWerror
CheckDeclarationAfterStatement
CheckDummyVideo
CheckDiskAudio
diff --git a/test/configure b/test/configure
index b598ebe..9c1e90a 100755
--- a/test/configure
+++ b/test/configure
@@ -701,6 +701,7 @@ with_sdl_prefix
with_sdl_exec_prefix
enable_sdltest
with_x
+enable_werror
'
ac_precious_vars='build_alias
host_alias
@@ -1344,6 +1345,7 @@ Optional Features:
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
--disable-sdltest Do not try to compile and run a test SDL program
+ --enable-werror treat warnings as errors [default=no]
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
@@ -4662,6 +4664,82 @@ if test x$have_opengl = xyes; then
OPENGL_TARGETS="TARGETS"
fi
+# Check whether --enable-werror was given.
+if test ${enable_werror+y}
+then :
+ enableval=$enable_werror; enable_werror=$enableval
+else $as_nop
+ enable_werror=no
+fi
+
+if test x$enable_werror = xyes; then
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Werror option" >&5
+printf %s "checking for GCC -Werror option... " >&6; }
+ have_gcc_werror=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Werror"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int x = 0;
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ have_gcc_werror=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $have_gcc_werror" >&5
+printf "%s\n" "$have_gcc_werror" >&6; }
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_werror = xyes; then
+ CFLAGS="$CFLAGS -Werror"
+ fi
+fi
+
+case "$host" in
+ *-ios-*|*-*-darwin* )
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for GCC -Werror option" >&5
+printf %s "checking for GCC -Werror option... " >&6; }
+ have_gcc_wno_error_deprecated_declarations=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Wno-error=deprecated-declarations"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ int x = 0;
+
+int
+main (void)
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+ have_gcc_wno_error_deprecated_declarations=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $have_gcc_werror" >&5
+printf "%s\n" "$have_gcc_werror" >&6; }
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_wno_error_deprecated_declarations = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-error=deprecated-declarations"
+ fi
+ ;;
+esac
+
diff --git a/test/configure.ac b/test/configure.ac
index 694551c..d31565d 100644
--- a/test/configure.ac
+++ b/test/configure.ac
@@ -184,6 +184,44 @@ if test x$have_opengl = xyes; then
OPENGL_TARGETS="TARGETS"
fi
+AC_ARG_ENABLE(werror,
+[AS_HELP_STRING([--enable-werror], [treat warnings as errors [default=no]])],
+ enable_werror=$enableval, enable_werror=no)
+if test x$enable_werror = xyes; then
+ AC_MSG_CHECKING(for GCC -Werror option)
+ have_gcc_werror=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Werror"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[int x = 0;]],[])],
+ [have_gcc_werror=yes], [])
+ AC_MSG_RESULT($have_gcc_werror)
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_werror = xyes; then
+ CFLAGS="$CFLAGS -Werror"
+ fi
+fi
+
+case "$host" in
+ *-ios-*|*-*-darwin* )
+ AC_MSG_CHECKING(for GCC -Werror option)
+ have_gcc_wno_error_deprecated_declarations=no
+
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$save_CFLAGS -Wno-error=deprecated-declarations"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ int x = 0;
+ ]],[])], [have_gcc_wno_error_deprecated_declarations=yes],[])
+ AC_MSG_RESULT($have_gcc_werror)
+ CFLAGS="$save_CFLAGS"
+
+ if test x$have_gcc_wno_error_deprecated_declarations = xyes; then
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -Wno-error=deprecated-declarations"
+ fi
+ ;;
+esac
+
AC_SUBST(OPENGLES1_TARGETS)
AC_SUBST(OPENGLES2_TARGETS)
AC_SUBST(OPENGL_TARGETS)