Fix gnutls autodetection when using a cross-compiler.

It is not enough to check for pkg-config gnutls.  You may be using a
cross-compiler and have gnutls available on the host but not for the target.
This patch changes the detection to try and build an application using gnutls
and whatever compiler is available.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4989 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/configure b/configure
index 0a3b7c9..bca3143 100755 (executable)
--- a/configure
+++ b/configure
@@ -737,11 +737,18 @@ fi # -z $sdl
 ##########################################
 # VNC TLS detection
 if test "$vnc_tls" = "yes" ; then
-  `pkg-config gnutls` || vnc_tls="no"
-fi
-if test "$vnc_tls" = "yes" ; then
-  vnc_tls_cflags=`pkg-config --cflags gnutls`
-  vnc_tls_libs=`pkg-config --libs gnutls`
+cat > $TMPC <<EOF
+#include <gnutls/gnutls.h>
+int main(void) { gnutls_session_t s; gnutls_init(&s, GNUTLS_SERVER); return 0; }
+EOF
+    vnc_tls_cflags=`pkg-config --cflags gnutls 2> /dev/null`
+    vnc_tls_libs=`pkg-config --libs gnutls 2> /dev/null`
+    if $cc $ARCH_CFLAGS -o $TMPE ${OS_CFLAGS} $vnc_tls_cflags $TMPC \
+           $vnc_tls_libs 2> /dev/null ; then
+       :
+    else
+       vnc_tls="no"
+    fi
 fi
 
 ##########################################