build: Use AX_COMPILER_FLAGS

Switch from GNOME_COMPILE_WARNINGS to AX_COMPILER_FLAGS. This integrates
better with CI systems, allows easy disabling of -Werror, and integrates
with AX_IS_RELEASE to automatically disable errors when building
releases.

https://wiki.gnome.org/Projects/GnomeCommon/Migration

1 files changed, 0 insertions, 177 deletions

diff --git a/m4/gnome-compiler-flags.m4 b/m4/gnome-compiler-flags.m4
deleted file mode 100644
index cd1a0f5b..00000000
--- a/m4/gnome-compiler-flags.m4
+++ /dev/null
@@ -1,177 +0,0 @@
-# gnome-compiler-flags.m4
-#
-# serial 2
-#
-
-dnl GNOME_COMPILE_WARNINGS
-dnl Turn on many useful compiler warnings and substitute the result into
-dnl WARN_CFLAGS
-dnl For now, only works on GCC
-dnl Pass the default value of the --enable-compile-warnings configure option as
-dnl the first argument to the macro, defaulting to 'yes'.
-dnl Additional warning/error flags can be passed as an optional second argument.
-dnl
-dnl For example: GNOME_COMPILE_WARNINGS([maximum],[-Werror=some-flag -Wfoobar])
-AC_DEFUN([GNOME_COMPILE_WARNINGS],[
-    dnl ******************************
-    dnl More compiler warnings
-    dnl ******************************
-
-    AC_ARG_ENABLE(compile-warnings, 
-                  AS_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],
-                                 [Turn on compiler warnings]),,
-                  [enable_compile_warnings="m4_default([$1],[yes])"])
-
-    if test "x$GCC" != xyes; then
-	enable_compile_warnings=no
-    fi
-
-    warning_flags=
-    realsave_CFLAGS="$CFLAGS"
-
-    dnl These are warning flags that aren't marked as fatal.  Can be
-    dnl overridden on a per-project basis with -Wno-foo.
-    base_warn_flags=" \
-        -Wall \
-        -Wstrict-prototypes \
-        -Wnested-externs \
-    "
-
-    dnl These compiler flags typically indicate very broken or suspicious
-    dnl code.  Some of them such as implicit-function-declaration are
-    dnl just not default because gcc compiles a lot of legacy code.
-    dnl We choose to make this set into explicit errors.
-    base_error_flags=" \
-        -Werror=missing-prototypes \
-        -Werror=implicit-function-declaration \
-        -Werror=pointer-arith \
-        -Werror=init-self \
-        -Werror=format-security \
-        -Werror=format=2 \
-        -Werror=missing-include-dirs \
-    "
-
-    dnl Additional warning or error flags provided by the module author to
-    dnl allow stricter standards to be imposed on a per-module basis.
-    dnl The author can pass -W or -Werror flags here as they see fit.
-    additional_flags="m4_default([$2],[])"
-
-    case "$enable_compile_warnings" in
-    no)
-        warning_flags=
-        ;;
-    minimum)
-        warning_flags="-Wall"
-        ;;
-    yes|maximum|error)
-        warning_flags="$base_warn_flags $base_error_flags $additional_flags"
-        ;;
-    *)
-        AC_MSG_ERROR(Unknown argument '$enable_compile_warnings' to --enable-compile-warnings)
-        ;;
-    esac
-
-    if test "$enable_compile_warnings" = "error" ; then
-        warning_flags="$warning_flags -Werror"
-    fi
-
-    dnl Check whether GCC supports the warning options
-    for option in $warning_flags; do
-	save_CFLAGS="$CFLAGS"
-	CFLAGS="$CFLAGS $option"
-	AC_MSG_CHECKING([whether gcc understands $option])
-	AC_TRY_COMPILE([], [],
-	    has_option=yes,
-	    has_option=no,)
-	CFLAGS="$save_CFLAGS"
-	AC_MSG_RESULT([$has_option])
-	if test $has_option = yes; then
-	    tested_warning_flags="$tested_warning_flags $option"
-	fi
-	unset has_option
-	unset save_CFLAGS
-    done
-    unset option
-    CFLAGS="$realsave_CFLAGS"
-    AC_MSG_CHECKING(what warning flags to pass to the C compiler)
-    AC_MSG_RESULT($tested_warning_flags)
-
-    AC_ARG_ENABLE(iso-c,
-                  AS_HELP_STRING([--enable-iso-c],
-                                 [Try to warn if code is not ISO C ]),,
-                  [enable_iso_c=no])
-
-    AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)
-    complCFLAGS=
-    if test "x$enable_iso_c" != "xno"; then
-	if test "x$GCC" = "xyes"; then
-	case " $CFLAGS " in
-	    *[\ \	]-ansi[\ \	]*) ;;
-	    *) complCFLAGS="$complCFLAGS -ansi" ;;
-	esac
-	case " $CFLAGS " in
-	    *[\ \	]-pedantic[\ \	]*) ;;
-	    *) complCFLAGS="$complCFLAGS -pedantic" ;;
-	esac
-	fi
-    fi
-    AC_MSG_RESULT($complCFLAGS)
-
-    WARN_CFLAGS="$tested_warning_flags $complCFLAGS"
-    AC_SUBST(WARN_CFLAGS)
-])
-
-dnl For C++, do basically the same thing.
-
-AC_DEFUN([GNOME_CXX_WARNINGS],[
-  AC_ARG_ENABLE(cxx-warnings,
-                AS_HELP_STRING([--enable-cxx-warnings=@<:@no/minimum/yes@:>@]
-                               [Turn on compiler warnings.]),,
-                [enable_cxx_warnings="m4_default([$1],[minimum])"])
-
-  AC_MSG_CHECKING(what warning flags to pass to the C++ compiler)
-  warnCXXFLAGS=
-  if test "x$GXX" != xyes; then
-    enable_cxx_warnings=no
-  fi
-  if test "x$enable_cxx_warnings" != "xno"; then
-    if test "x$GXX" = "xyes"; then
-      case " $CXXFLAGS " in
-      *[\ \	]-Wall[\ \	]*) ;;
-      *) warnCXXFLAGS="-Wall -Wno-unused" ;;
-      esac
-
-      ## -W is not all that useful.  And it cannot be controlled
-      ## with individual -Wno-xxx flags, unlike -Wall
-      if test "x$enable_cxx_warnings" = "xyes"; then
-	warnCXXFLAGS="$warnCXXFLAGS -Wshadow -Woverloaded-virtual"
-      fi
-    fi
-  fi
-  AC_MSG_RESULT($warnCXXFLAGS)
-
-   AC_ARG_ENABLE(iso-cxx,
-                 AS_HELP_STRING([--enable-iso-cxx],
-                                [Try to warn if code is not ISO C++ ]),,
-                 [enable_iso_cxx=no])
-
-   AC_MSG_CHECKING(what language compliance flags to pass to the C++ compiler)
-   complCXXFLAGS=
-   if test "x$enable_iso_cxx" != "xno"; then
-     if test "x$GXX" = "xyes"; then
-      case " $CXXFLAGS " in
-      *[\ \	]-ansi[\ \	]*) ;;
-      *) complCXXFLAGS="$complCXXFLAGS -ansi" ;;
-      esac
-
-      case " $CXXFLAGS " in
-      *[\ \	]-pedantic[\ \	]*) ;;
-      *) complCXXFLAGS="$complCXXFLAGS -pedantic" ;;
-      esac
-     fi
-   fi
-  AC_MSG_RESULT($complCXXFLAGS)
-
-  WARN_CXXFLAGS="$CXXFLAGS $warnCXXFLAGS $complCXXFLAGS"
-  AC_SUBST(WARN_CXXFLAGS)
-])