On Thu, Jul 30, 2009 at 9:57 AM, Chris Packham<judge.pack...@gmail.com> wrote:
> A bit of googling turned up some guideance on how to handle this [1].
> Looks like there is an optional argument to AC_RUN_IFELSE that can be
> used for an action-if-cross-compiling. The cache manipulation trick is
> also mentioned. I'll post a patch shortly.
Turned out to be easy enough after I figured out the autoconf syntax.
The changes are basically to 1) allow the tests that execute code to
be skipped if cross compiling and 2) turn the libpcap_version into a
cached variable so that we can tell tcpreplay which version of libpcap
is used in our target environment.
With my patch applied the typical usage is
autoreconf # this won't be necessary once my patch is accepted upstream
tr_cv_libpcap_version=">= 0.7.0" \
./configure --target=powerpc-linux \
--host=powerpc-linux \
--build=i386-pc-linux-gnu \
--program-prefix="" \
--with-libpcap=<path-to-libpcap>
--- tcpreplay-3.4.3/configure.ac 2009-06-26 06:45:55.000000000 +1200
+++ tcpreplay-3.4.3-new/configure.ac 2009-07-30 11:59:35.000000000 +1200
@@ -420,6 +420,11 @@
exit(1);
]]), [
libpcap_version_096=yes
+], [
+ libpcap_version_096=no
+], [
+ AC_MSG_WARN([Tests not run when cross compiling])
+ libpcap_version_096=no
])
libpcap_ver8=no
@@ -447,6 +452,9 @@
libpcap_ver8=yes
], [
libpcap_ver8=no
+], [
+ AC_MSG_WARN([Tests not run when cross compiling])
+ libpcap_ver8=no
])
libpcap_ver7=no
@@ -472,25 +480,31 @@
libpcap_ver7=yes
], [
libpcap_ver7=no
+], [
+ AC_MSG_WARN([Tests not run when cross compiling])
+ libpcap_ver7=no
])
-if test x$libpcap_ver8 = xyes ; then
- AC_MSG_RESULT(>= 0.8.0)
-elif test x$libpcap_ver7 = xyes ; then
- AC_MSG_RESULT(>= 0.7.2)
-else
- AC_MSG_ERROR([Libpcap versions < 0.7.2 are not supported
- Please upgrade to version 0.7.2 or better])
-fi
-
-libpcap_version=unknown
-if test x$libpcap_version_096 = xyes ; then
- libpcap_version=">= 0.9.6"
-elif test x$libpcap_ver8 = xyes ; then
- libpcap_version=">= 0.8.0"
-elif test x$libcap_ver7 = xyes ; then
- libpcap_version=">= 0.7.0"
-fi
+AC_CACHE_CHECK([for supported libpcap verision], [tr_cv_libpcap_version],
+[
+ if test x$libpcap_ver8 = xyes ; then
+ AC_MSG_RESULT(>= 0.8.0)
+ elif test x$libpcap_ver7 = xyes ; then
+ AC_MSG_RESULT(>= 0.7.2)
+ else
+ AC_MSG_ERROR([Libpcap versions < 0.7.2 are not supported
+ Please upgrade to version 0.7.2 or better])
+ fi
+
+ tr_cv_libpcap_version=unknown
+ if test x$tr_cv_libpcap_version_096 = xyes ; then
+ tr_cv_libpcap_version=">= 0.9.6"
+ elif test x$libpcap_ver8 = xyes ; then
+ tr_cv_libpcap_version=">= 0.8.0"
+ elif test x$libcap_ver7 = xyes ; then
+ tr_cv_libpcap_version=">= 0.7.0"
+ fi
+] )
dnl Check for pcap_setnonblock()
AC_MSG_CHECKING(for pcap_setnonblock)
@@ -770,6 +784,9 @@
have_bpf=yes
],[
AC_MSG_RESULT(no)
+],[
+ AC_MSG_WARN([Tests not run when cross compiling])
+ AC_MSG_RESULT(no)
])
@@ -1189,7 +1206,7 @@
##########################################################################
TCPREPLAY Suite Configuration Results (${TCPREPLAY_VERSION})
##########################################################################
-libpcap: ${foundpcap} (${libpcap_version})
+libpcap: ${foundpcap} (${tr_cv_libpcap_version})
libdnet: ${founddnet} (${libdnet_version})
autogen: ${AUTOGEN} (${AUTOGEN_VERSION})
Use libopts tearoff: ${enable_local_libopts}
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