New file. Defines the GNOME_COMPILER_WARNINGS macro. Add

* compiler-flags.m4: New file.  Defines the
GNOME_COMPILER_WARNINGS macro.
* autogen.sh (conf_flags): Add `--enable-compile-warnings' to list
of flags passed to `configure'.
* Makefile.am (MACROS): Add compiler-flags.m4.

svn path=/trunk/; revision=327

4 files changed, 58 insertions, 3 deletions

diff --git a/macros/ChangeLog b/macros/ChangeLog
index 7b0de54844..789dec8220 100644
--- a/macros/ChangeLog
+++ b/macros/ChangeLog
@@ -1,3 +1,11 @@
+1998-08-20  Raja R Harinath  <harinath@cs.umn.edu>
+
+	* compiler-flags.m4: New file.  Defines the
+	GNOME_COMPILER_WARNINGS macro.
+	* autogen.sh (conf_flags): Add `--enable-compile-warnings' to list
+	of flags passed to `configure'.
+	* Makefile.am (MACROS): Add compiler-flags.m4.
+
 1998-08-18  Martin Baulig  <martin@home-of-linux.org>
 
 	* gnome-libgtop-check.m4: make it require libgtop >= 0.25.0.
diff --git a/macros/Makefile.am b/macros/Makefile.am
index 3bb9e94c11..494835ea97 100644
--- a/macros/Makefile.am
+++ b/macros/Makefile.am
@@ -1,6 +1,7 @@
 ## Please update this variable if any new macros are created
 MACROS=						\
   aclocal-include.m4				\
+  compiler-flags.m4				\
   curses.m4					\
   gnome-fileutils.m4				\
   gnome-guile-checks.m4				\
diff --git a/macros/autogen.sh b/macros/autogen.sh
index 8248c0c328..cbd6a06157 100644
--- a/macros/autogen.sh
+++ b/macros/autogen.sh
@@ -73,9 +73,10 @@ do
 done
 
 if test x$NOCONFIGURE = x; then
-echo running $srcdir/configure --enable-maintainer-mode "$@"
-$srcdir/configure --enable-maintainer-mode "$@" \
+conf_flags="--enable-maintainer-mode --enable-compile-warnings" #--enable-iso-c
+echo running $srcdir/configure $conf_flags "$@"
+$srcdir/configure $conf_flags "$@" \
 && echo Now type \`make\' to compile the $PKG_NAME
 else
 echo Skipping configure process.
-fi
\ No newline at end of file
+fi
diff --git a/macros/compiler-flags.m4 b/macros/compiler-flags.m4
new file mode 100644
index 0000000000..953e8ebb5b
--- /dev/null
+++ b/macros/compiler-flags.m4
@@ -0,0 +1,45 @@
+dnl GNOME_COMPILE_WARNINGS
+dnl Turn on many useful compiler warnings
+dnl For now, only works on GCC
+AC_DEFUN([GNOME_COMPILE_WARNINGS],[
+  AC_ARG_ENABLE(compile-warnings, 
+    [  --enable-compile-warnings=[no/minimum/yes]	Turn on compiler warnings.],,enable_compile_warnings=minimum)
+
+  AC_MSG_CHECKING(what warning flags to pass to the C compiler)
+  warnCFLAGS=
+  if test "x$enable_compile_warnings" != "xno"; then
+    if test "x$GCC" = "xyes"; then
+      case " $CFLAGS " in
+      *[\ \	]-Wall[\ \	]*) ;;
+      *) warnCFLAGS="-Wall" ;;
+      esac
+
+      if test "x$enable_compile_warnings" = "xyes"; then
+	warnCFLAGS="$warnCFLAGS -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith"
+      fi
+    fi
+  fi
+  AC_MSG_RESULT($warnCFLAGS)
+
+  AC_ARG_ENABLE(iso-c,
+    [  --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($complCFLAGS)
+  CFLAGS="$CFLAGS $warnCFLAGS $complCFLAGS"
+])