[PATCH] configure: fix external libcap cross-compile

[Mike Frysinger <vapier () gentoo org>]

If cross-compiling nmap against an external libpcap, the configure will
always fail with no way around it:

checking pcap.h usability... yes
checking pcap.h presence... yes
checking for pcap.h... yes
checking for pcap_datalink in -lpcap... yes
checking if libpcap version is recent enough... configure: error: cannot run test program while cross compiling
See `config.log' for more details.

Same thing happens in the ncat/ subdir which isn't surprising as both seem
to use the same libpcap configure code.

If people are cross-compiling, then let's just assume their system doesn't
suck.  If it does, then it'll fail for other reasons anyways, so ...

Signed-off-by: Mike Frysinger <vapier () gentoo org>
---
 configure.ac      |    3 ++-
 ncat/configure.ac |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 555ce7f..5e2ec6c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -387,7 +387,8 @@ int main() {
   exit(0);
 }],
 [AC_MSG_RESULT(yes); have_libpcap=yes],
-[AC_MSG_RESULT(no); have_libpcap=no])
+[AC_MSG_RESULT(no); have_libpcap=no],
+[AC_MSG_RESULT(cross-compiling -- assuming yes); have_libpcap=yes])
 LIBS="$LIBS_OLD"
 fi
 
diff --git a/ncat/configure.ac b/ncat/configure.ac
index 05d89d4..5adb297 100644
--- a/ncat/configure.ac
+++ b/ncat/configure.ac
@@ -164,7 +164,8 @@ int main() {
   exit(0);
 }],
 [AC_MSG_RESULT(yes); have_libpcap=yes],
-[AC_MSG_RESULT(no); have_libpcap=no])
+[AC_MSG_RESULT(no); have_libpcap=no],
+[AC_MSG_RESULT(cross-compiling -- assuming yes); have_libpcap=yes])
 LIBS="$LIBS_OLD"
 fi
 
-- 
1.6.3


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