X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=configure.in;h=f3414f8ccded635c9869c11e58bd36786257770e;hb=d4c1e82d8c81b2f2938acab8bf3c12cbea137350;hp=2c2f3cde1c00c60af5dce7b97c0b4944fa92da1b;hpb=f370d70670bd5e30befe6fbfbc8d472e760f032b;p=openocd.git

diff --git a/configure.in b/configure.in
index 2c2f3cde1c..f3414f8ccd 100644
--- a/configure.in
+++ b/configure.in
@@ -20,6 +20,7 @@ AC_CHECK_FUNCS(strndup)
 AC_CHECK_FUNCS(strnlen)
 AC_CHECK_FUNCS(gettimeofday)
 AC_CHECK_FUNCS(usleep)
+AC_CHECK_FUNCS(vasprintf)
 
 build_bitbang=no
 build_bitq=no
@@ -27,11 +28,9 @@ is_cygwin=no
 is_mingw=no
 is_win32=no
 
-
 AC_ARG_ENABLE(gccwarnings,
-	AS_HELP_STRING([--enable-gccwarnings], [Enable compiler warnings, default yes]),
-	[gcc_warnings=$enablevalue], [gcc_warnings=yes])
-
+	AS_HELP_STRING([--enable-gccwarnings], [Enable compiler warnings, default no]),
+	[gcc_warnings=$enableval], [gcc_warnings=no])
 
 AC_ARG_ENABLE(parport,
   AS_HELP_STRING([--enable-parport], [Enable building the pc parallel port driver]), 
@@ -297,24 +296,27 @@ 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 $GCC_WARNINGS"
-fi
-
-if test $gcc_warnings = yes; then
-   CFLAGS_FOR_BUILD="$CFLAGS_FOR_BUILD -Wall -Wmissing-prototypes -Wstrict-prototypes"
+	CFLAGS_FOR_BUILD=$CFLAGS
 fi
 
 AC_MSG_RESULT([$CC_FOR_BUILD])
 AC_SUBST(CC_FOR_BUILD)
 AC_SUBST(CFLAGS_FOR_BUILD)
-AC_MSG_NOTICE([CFLAGS_FOR_BUILD = $CFLAGS_FOR_BUILD])
 
 AC_MSG_CHECKING([for suffix of executable build tools])
 if test $cross_compiling = yes; then