Compiles more cleanly on systems that do not have -g or -O2 flags.

diff --git a/configure.ac b/configure.ac
index 524bdf4fa361a7ffbe04bc55531c183d1cace023..3cb20e7e1fb654a73f0051949413d813ef643cc4 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -11,6 +11,7 @@ PACKAGE_VERSION="$PACKAGE_VERSION"
 
 OURCPPFLAGS=''
 CPPFLAGS=${CPPFLAGS:-${OURCPPFLAGS}}
+CFLAGS=
 
 AC_AIX
 # Checks for programs.
@@ -104,6 +105,8 @@ fi
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_LANG_C
+CHECK_COMPILER_FLAG(g, [CFLAGS="$CFLAGS -g"])
+CHECK_COMPILER_FLAG(O2, [CFLAGS="$CFLAGS -O2"])
 CHECK_COMPILER_FLAG(Wall, [CFLAGS="$CFLAGS -Wall"])
 CHECK_COMPILER_FLAG(W, [CFLAGS="$CFLAGS -W"])
 CHECK_COMPILER_FLAG(Wwrite-strings, [CFLAGS="$CFLAGS -Wwrite-strings"])