X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=configure.in;h=007ac14237e462ac2ce49d3097f0b64ef8d988e6;hb=4e0bad8679a7d88b6185de73c34f88fd95bd017e;hp=8f9b56f39f8bdb255ebe63a2e89706c99520f6b4;hpb=c77b785505f050c955152059b8244b3db50f27d9;p=openocd.git

diff --git a/configure.in b/configure.in
index 8f9b56f39f..007ac14237 100644
--- a/configure.in
+++ b/configure.in
@@ -27,6 +27,10 @@ is_cygwin=no
 is_mingw=no
 is_win32=no
 
+AC_ARG_ENABLE(gccwarnings,
+	AS_HELP_STRING([--enable-gccwarnings], [Enable compiler warnings, default no]),
+	[gcc_warnings=$enableval], [gcc_warnings=no])
+
 AC_ARG_ENABLE(parport,
   AS_HELP_STRING([--enable-parport], [Enable building the pc parallel port driver]), 
   [build_parport=$enableval], [build_parport=no])
@@ -291,15 +295,24 @@ AC_LANG_C
 AC_PROG_CC
 AC_PROG_RANLIB
 
+# set default gcc warnings
+GCC_WARNINGS="-Wall -Wstrict-prototypes"
+
+# overide default gcc cflags
+if test $gcc_warnings = yes; then
+	CFLAGS="$CFLAGS $GCC_WARNINGS"
+fi
+
 # Setup for compiling build tools
 AC_MSG_CHECKING([for a C compiler for build tools])
 if test $cross_compiling = yes; then
 	AC_CHECK_PROGS(CC_FOR_BUILD, gcc cc)
-	CFLAGS_FOR_BUILD="-g -O2"
+	CFLAGS_FOR_BUILD="-g -O2 $GCC_WARNINGS"
 else
 	CC_FOR_BUILD=$CC
 	CFLAGS_FOR_BUILD=$CFLAGS
 fi
+
 AC_MSG_RESULT([$CC_FOR_BUILD])
 AC_SUBST(CC_FOR_BUILD)
 AC_SUBST(CFLAGS_FOR_BUILD)