Simple-minded copy of GNOME_COMPILE_WARNINGS that sets CXXFLAGS

(GNOME_CXX_WARNINGS)

svn path=/trunk/; revision=453

1 files changed, 41 insertions, 0 deletions

diff --git a/macros/compiler-flags.m4 b/macros/compiler-flags.m4
index 1a5cd8c6b2..51ff70fc05 100644
--- a/macros/compiler-flags.m4
+++ b/macros/compiler-flags.m4
@@ -45,3 +45,44 @@ AC_DEFUN([GNOME_COMPILE_WARNINGS],[
   AC_MSG_RESULT($complCFLAGS)
   CFLAGS="$CFLAGS $warnCFLAGS $complCFLAGS"
 ])
+
+dnl For C++, do basically the same thing.
+
+AC_DEFUN([GNOME_CXX_WARNINGS],[
+  AC_ARG_ENABLE(cxx-warnings, 
+    [  --enable-cxx-warnings=[no/minimum/yes]	Turn on compiler warnings.],,enable_cxx_warnings=minimum)
+
+  AC_MSG_CHECKING(what warning flags to pass to the C++ compiler)
+  warnCXXFLAGS=
+  if test "x$enable_cxx_warnings" != "xno"; then
+    if test "x$GCC" = "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="$warnCXXFLAGS -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith"
+      fi
+    fi
+  fi
+  AC_MSG_RESULT($warnCXXFLAGS)
+
+  AC_MSG_CHECKING(what language compliance flags to pass to the C compiler)
+  complCFLAGS=
+    if test "x$GCC" = "xyes"; then
+      case " $CXXFLAGS " in
+      *[\ \	]-ansi[\ \	]*) ;;
+      *) complCXXFLAGS="$complCXXFLAGS -ansi" ;;
+      esac
+
+      case " $CXXFLAGS " in
+      *[\ \	]-pedantic[\ \	]*) ;;
+      *) complCXXFLAGS="$complCXXFLAGS -pedantic" ;;
+      esac
+    fi
+  AC_MSG_RESULT($complCXXFLAGS)
+  CXXFLAGS="$CXXFLAGS $warnCXXFLAGS $complCXXFLAGS"
+])