tcprelay: fix a minor cross compilation do_configure issue

We're seeing errors like below in log.do_configure:

  ./conftest: cannot execute binary file: Exec format error

The tcprelay's configure have two places to execute ./conftest.
And the result happens to be correct even with the error above.

Instead of leaving the errors as they are, we explicitly skip
running ./conftest in case of cross compiling. The build will
continue to succeed and result will remain the same.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 52 insertions, 0 deletions

diff --git a/meta-networking/recipes-support/tcpreplay/tcpreplay/0001-configure.ac-do-not-run-conftest-in-case-of-cross-co.patch b/meta-networking/recipes-support/tcpreplay/tcpreplay/0001-configure.ac-do-not-run-conftest-in-case-of-cross-co.patch
new file mode 100644
index 000000000..08cb3b88f
--- /dev/null
+++ b/meta-networking/recipes-support/tcpreplay/tcpreplay/0001-configure.ac-do-not-run-conftest-in-case-of-cross-co.patch
@@ -0,0 +1,51 @@
+From 42f7bbc1ce4913fe2c0bc76293c5445d31690f5d Mon Sep 17 00:00:00 2001
+From: Chen Qi <Qi.Chen@windriver.com>
+Date: Thu, 7 Mar 2024 21:02:07 -0800
+Subject: [PATCH] configure.ac: do not run conftest in case of cross
+ compilation
+
+It'll give us nothing but error like below:
+
+  ./conftest: cannot execute binary file: Exec format error
+  ...
+  ./configure: line 23950: test: -eq: unary operator expected
+
+The version check only has effect on Apple systems. We'd better
+avoid error like above when cross compilation.
+
+Also, in case of cross compilation, instead of having the above
+Exec format error and resulting in unaligned_cv_fail to yes, set
+it directly to yes.
+
+Upstream-Status: Submitted [https://github.com/appneta/tcpreplay/pull/849]
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ configure.ac | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 387219de..15201601 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -928,7 +928,7 @@ cat >conftest.c <<EOF
+ EOF
+ ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LPCAPLIB \
+     conftest.c $LIBS >/dev/null 2>&1
+-if test -x conftest ; then
++if test -x conftest -a "$cross_compiling" != "yes"; then
+     full_libpcap_version=$(LD_LIBRARY_PATH="$LPCAP_LD_LIBRARY_PATH" ./conftest)
+     libpcap_version=$(echo "$full_libpcap_version" | ${CUT} -d' ' -f3)
+     pcap_version_ok=yes
+@@ -1709,7 +1709,7 @@ case "$host_os" in
+ EOF
+         ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \
+             conftest.c $LIBS >/dev/null 2>&1
+-        if test ! -x conftest ; then
++        if test ! -x conftest -o "$cross_compiling" = "yes" ; then
+             dnl failed to compile for some reason
+             unaligned_cv_fail=yes
+         else
+-- 
+2.42.0
+
diff --git a/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb b/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
index 53f17c961..26de40a65 100644
--- a/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
+++ b/meta-networking/recipes-support/tcpreplay/tcpreplay_4.4.4.bb
@@ -10,6 +10,7 @@ LIC_FILES_CHKSUM = "file://docs/LICENSE;md5=10f0474a2f0e5dccfca20f69d6598ad8"
 SRC_URI = "https://github.com/appneta/${BPN}/releases/download/v${PV}/${BP}.tar.gz \
     file://0001-libopts.m4-set-POSIX_SHELL-to-bin-sh.patch \
     file://0001-configure.ac-unify-search-dirs-for-pcap-and-add-lib3.patch \
+    file://0001-configure.ac-do-not-run-conftest-in-case-of-cross-co.patch \
 "
 
 SRC_URI[sha256sum] = "44f18fb6d3470ecaf77a51b901a119dae16da5be4d4140ffbb2785e37ad6d4bf"