Use WARN_CFLAGS which are only set with --enable-compiler-warnings

It removes --enable-more-warnings, since it is recommended to use
--enable-compile-warnings=maximum

It updates configure summary.

Test:

./autogen.sh --disable-silent-rules --enable-compile-warnings=maximum --prefix=/usr && make

1 files changed, 2 insertions, 43 deletions

diff --git a/configure.ac b/configure.ac
index ee88500..ff6f819 100644
--- a/configure.ac
+++ b/configure.ac
@@ -14,6 +14,7 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_CONFIG_HEADERS(config.h)
 
 AM_MAINTAINER_MODE
+MATE_COMPILE_WARNINGS([yes])
 
 IT_PROG_INTLTOOL([0.50.1])
 AC_PROG_CC
@@ -115,8 +116,6 @@ if test -z "$XMLLINT"; then
   AC_MSG_ERROR([xmllint not found])
 fi
 
-MATE_COMPILE_WARNINGS(yes)
-
 # Solaris requires libresolv for daemon()
 case "$host" in
 	*-*-solaris*)
@@ -1053,47 +1052,6 @@ AC_SUBST(EXPANDED_DATADIR)
 prefix=$old_prefix
 exec_prefix=$old_exec_prefix
 
-# Turn on the additional warnings last, so -Werror doesn't affect other tests.
-
-AC_ARG_ENABLE(more-warnings,
-  AC_HELP_STRING([--enable-more-warnings], [Maximum compiler warnings]),
-set_more_warnings="$enableval",[
-if test -d $srcdir/.git; then
-        is_cvs_version=true
-        set_more_warnings=yes
-else
-        set_more_warnings=no
-fi
-])
-AC_MSG_CHECKING(for more warnings)
-if test "$GCC" = "yes" -a "$set_more_warnings" != "no"; then
-        AC_MSG_RESULT(yes)
-        CFLAGS="\
-        -Wall \
-        -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes \
-        -Wnested-externs -Wpointer-arith \
-        -Wcast-align -Wsign-compare \
-        $CFLAGS"
-
-        for option in -Wno-strict-aliasing -Wno-sign-compare; do
-                SAVE_CFLAGS="$CFLAGS"
-                CFLAGS="$CFLAGS $option"
-                AC_MSG_CHECKING([whether gcc understands $option])
-                AC_TRY_COMPILE([], [],
-                        has_option=yes,
-                        has_option=no,)
-                if test $has_option = no; then
-                        CFLAGS="$SAVE_CFLAGS"
-                fi
-                AC_MSG_RESULT($has_option)
-                unset has_option
-                unset SAVE_CFLAGS
-        done
-        unset option
-else
-        AC_MSG_RESULT(no)
-fi
-
 #
 # Enable Debug
 #
@@ -1177,6 +1135,7 @@ echo "
         source code location:     ${srcdir}
         compiler:                 ${CC}
         cflags:                   ${CFLAGS}
+        Warning flags:            ${WARN_CFLAGS}
         Base libs:                ${MATE_SCREENSAVER_LIBS}
         Extension libs:           ${SAVER_LIBS}
         Maintainer mode:          ${USE_MAINTAINER_MODE}