diff options
Diffstat (limited to 'm4/gst-error.m4')
| -rw-r--r-- | m4/gst-error.m4 | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/m4/gst-error.m4 b/m4/gst-error.m4 index f8f2364..d21e324 100644 --- a/m4/gst-error.m4 +++ b/m4/gst-error.m4 @@ -196,6 +196,94 @@ AC_DEFUN([AG_GST_SET_ERROR_CXXFLAGS], AC_MSG_NOTICE([set ERROR_CXXFLAGS to $ERROR_CXXFLAGS]) ]) +dnl Sets WARNING_OBJCFLAGS and ERROR_OBJCFLAGS to something the compiler +dnl will accept and AC_SUBST them so they are available in Makefile +dnl +dnl WARNING_OBJCFLAGS will contain flags to make the compiler emit more +dnl warnings. +dnl ERROR_OBJCFLAGS will contain flags to make those warnings fatal, +dnl unless ADD-WERROR is set to "no" +dnl +dnl If MORE_FLAGS is set, tries to add each of the given flags +dnl to WARNING_CFLAGS if the compiler supports them. Each flag is +dnl tested separately. +dnl +dnl These flags can be overridden at make time: +dnl make ERROR_OBJCFLAGS= +AC_DEFUN([AG_GST_SET_ERROR_OBJCFLAGS], +[ + AC_REQUIRE([AC_PROG_OBJC]) + AC_REQUIRE([AS_OBJC_COMPILER_FLAG]) + + ERROR_OBJCFLAGS="" + WARNING_OBJCFLAGS="" + + dnl if we support -Wall, set it unconditionally + AS_OBJC_COMPILER_FLAG(-Wall, WARNING_OBJCFLAGS="$WARNING_OBJCFLAGS -Wall") + + dnl if asked for, add -Werror if supported + if test "x$1" != "xno" + then + AS_OBJC_COMPILER_FLAG(-Werror, ERROR_OBJCFLAGS="$ERROR_OBJCFLAGS -Werror") + + if test "x$ERROR_OBJCFLAGS" != "x" + then + dnl add exceptions + AS_OBJC_COMPILER_FLAG([-Wno-non-virtual-dtor], ERROR_OBJCFLAGS="$ERROR_OBJCFLAGS -Wno-non-virtual-dtor") + + dnl Add -fno-strict-aliasing for GLib versions before 2.19.8 + dnl as before G_LOCK and friends caused strict aliasing compiler + dnl warnings. + PKG_CHECK_EXISTS([glib-2.0 < 2.19.8], [ + AS_OBJC_COMPILER_FLAG([-fno-strict-aliasing], + ERROR_OBJCFLAGS="$ERROR_OBJCFLAGS -fno-strict-aliasing") + ]) + else + dnl if -Werror isn't suported, try -errwarn=%all + AS_OBJC_COMPILER_FLAG([-errwarn=%all], ERROR_OBJCFLAGS="$ERROR_OBJCFLAGS -errwarn=%all") + if test "x$ERROR_OBJCFLAGS" != "x"; then + dnl try -errwarn=%all,no%E_EMPTY_DECLARATION, + dnl no%E_STATEMENT_NOT_REACHED,no%E_ARGUEMENT_MISMATCH, + dnl no%E_MACRO_REDEFINED (Sun Forte case) + dnl For Forte we need disable "empty declaration" warning produced by un-needed semicolon + dnl "statement not reached" disabled because there is g_assert_not_reached () in some places + dnl "macro redefined" because of gst/gettext.h + dnl FIXME: is it really supposed to be 'ARGUEMENT' and not 'ARGUMENT'? + dnl FIXME: do any of these work with the c++ compiler? if not, why + dnl do we check at all? + for f in 'no%E_EMPTY_DECLARATION' \ + 'no%E_STATEMENT_NOT_REACHED' \ + 'no%E_ARGUEMENT_MISMATCH' \ + 'no%E_MACRO_REDEFINED' \ + 'no%E_LOOP_NOT_ENTERED_AT_TOP' + do + AS_OBJC_COMPILER_FLAG([-errwarn=%all,$f], ERROR_OBJCFLAGS="$ERROR_OBJCFLAGS,$f") + done + fi + fi + fi + + if test "x$2" != "x" + then + UNSUPPORTED="" + list="$2" + for each in $list + do + AS_OBJC_COMPILER_FLAG($each, + WARNING_OBJCFLAGS="$WARNING_OBJCFLAGS $each", + UNSUPPORTED="$UNSUPPORTED $each") + done + if test "X$UNSUPPORTED" != X ; then + AC_MSG_NOTICE([unsupported compiler flags: $UNSUPPORTED]) + fi + fi + + AC_SUBST(WARNING_OBJCFLAGS) + AC_SUBST(ERROR_OBJCFLAGS) + AC_MSG_NOTICE([set WARNING_OBJCFLAGS to $WARNING_OBJCFLAGS]) + AC_MSG_NOTICE([set ERROR_OBJCFLAGS to $ERROR_OBJCFLAGS]) +]) + dnl Sets the default error level for debugging messages AC_DEFUN([AG_GST_SET_LEVEL_DEFAULT], [ |