Attention is currently required from: plaisthos.

Hello plaisthos,

I'd like you to do a code review.
Please visit

    http://gerrit.openvpn.net/c/openvpn/+/724?usp=email

to review the following change.


Change subject: configure: Handle libnl-genl and libcap-ng consistent with 
other libs
......................................................................

configure: Handle libnl-genl and libcap-ng consistent with other libs

Do not communicate any of the flags via the global
CFLAGS and LIBS, so that users are not confused when
overriding them on the command line.

Change-Id: I39a6f58b11b922f5dbd3e55a5bc8574eda8a83fe
Signed-off-by: Frank Lichtenheld <fr...@lichtenheld.com>
---
M configure.ac
M src/openvpn/Makefile.am
2 files changed, 17 insertions(+), 9 deletions(-)



  git pull ssh://gerrit.openvpn.net:29418/openvpn refs/changes/24/724/1

diff --git a/configure.ac b/configure.ac
index 9ce826c..5c44822 100644
--- a/configure.ac
+++ b/configure.ac
@@ -824,8 +824,8 @@
                                           AC_MSG_ERROR([libnl-genl-3.0 package 
not found or too old. Is the development package and pkg-config 
${pkg_config_found} installed? Must be version 3.4.0 or newer for DCO])
                                          ]
                                )
-                               CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
-                               LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
+                               
OPTIONAL_LIBNL_GENL_CFLAGS="${LIBNL_GENL_CFLAGS}"
+                               OPTIONAL_LIBNL_GENL_LIBS="${LIBNL_GENL_LIBS}"

                                AC_DEFINE(ENABLE_DCO, 1, [Enable shared data 
channel offload])
                                AC_MSG_NOTICE([Enabled ovpn-dco support for 
Linux])
@@ -865,7 +865,6 @@
 dnl
 case "$host" in
        *-*-linux*)
-               # We require pkg-config
                PKG_CHECK_MODULES([LIBCAPNG],
                                  [libcap-ng],
                                  [],
@@ -873,8 +872,8 @@
                )
                AC_CHECK_HEADER([sys/prctl.h],,[AC_MSG_ERROR([sys/prctl.h not 
found!])])
 
-               CFLAGS="${CFLAGS} ${LIBCAPNG_CFLAGS}"
-               LIBS="${LIBS} ${LIBCAPNG_LIBS}"
+               OPTIONAL_LIBCAPNG_CFLAGS="${LIBCAPNG_CFLAGS}"
+               OPTIONAL_LIBCAPNG_LIBS="${LIBCAPNG_LIBS}"
                AC_DEFINE(HAVE_LIBCAPNG, 1, [Enable libcap-ng support])
        ;;
 esac
@@ -1414,7 +1413,7 @@

 # When testing a compiler option, we add -Werror to force
 # an error when the option is unsupported. This is not
-# required for gcc, but some compilers such as clang needs it.
+# required for gcc, but some compilers such as clang need it.
 AC_DEFUN([ACL_CHECK_ADD_COMPILE_FLAGS], [
     old_cflags="$CFLAGS"
     CFLAGS="$1 -Werror $CFLAGS"
@@ -1490,6 +1489,10 @@
 AC_SUBST([OPTIONAL_SELINUX_LIBS])
 AC_SUBST([OPTIONAL_CRYPTO_CFLAGS])
 AC_SUBST([OPTIONAL_CRYPTO_LIBS])
+AC_SUBST([OPTIONAL_LIBCAPNG_CFLAGS])
+AC_SUBST([OPTIONAL_LIBCAPNG_LIBS])
+AC_SUBST([OPTIONAL_LIBNL_GENL_CFLAGS])
+AC_SUBST([OPTIONAL_LIBNL_GENL_LIBS])
 AC_SUBST([OPTIONAL_LZO_CFLAGS])
 AC_SUBST([OPTIONAL_LZO_LIBS])
 AC_SUBST([OPTIONAL_LZ4_CFLAGS])
@@ -1534,10 +1537,11 @@
 AM_CONDITIONAL([ENABLE_UNITTESTS], [test "${enable_unit_tests}" = "yes" -a 
"${have_cmocka}" = "yes" ])
 AC_SUBST([ENABLE_UNITTESTS])

-TEST_LDFLAGS="${OPTIONAL_CRYPTO_LIBS} ${OPTIONAL_PKCS11_HELPER_LIBS}"
+TEST_LDFLAGS="${OPTIONAL_CRYPTO_LIBS} ${OPTIONAL_PKCS11_HELPER_LIBS} 
${OPTIONAL_LIBCAPNG_LIBS}"
+TEST_LDFLAGS="${TEST_LDFLAGS} ${OPTIONAL_LIBNL_GENL_LIBS}"
 TEST_LDFLAGS="${TEST_LDFLAGS} ${OPTIONAL_LZO_LIBS} ${CMOCKA_LIBS}"
-TEST_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${OPTIONAL_PKCS11_HELPER_CFLAGS}"
-TEST_CFLAGS="${TEST_CFLAGS} ${OPTIONAL_LZO_CFLAGS}"
+TEST_CFLAGS="${OPTIONAL_CRYPTO_CFLAGS} ${OPTIONAL_PKCS11_HELPER_CFLAGS} 
${OPTIONAL_LIBCAPNG_CFLAGS}"
+TEST_CFLAGS="${TEST_CFLAGS} ${OPTIONAL_LIBNL_GENL_CFLAGS} 
${OPTIONAL_LZO_CFLAGS}"
 TEST_CFLAGS="${TEST_CFLAGS} -I\$(top_srcdir)/include ${CMOCKA_CFLAGS}"

 AC_SUBST([TEST_LDFLAGS])
diff --git a/src/openvpn/Makefile.am b/src/openvpn/Makefile.am
index 56cce9d..3784a98 100644
--- a/src/openvpn/Makefile.am
+++ b/src/openvpn/Makefile.am
@@ -24,6 +24,8 @@
 AM_CFLAGS = \
        $(TAP_CFLAGS) \
        $(OPTIONAL_CRYPTO_CFLAGS) \
+       $(OPTIONAL_LIBCAPNG_CFLAGS) \
+       $(OPTIONAL_LIBNL_GENL_CFLAGS) \
        $(OPTIONAL_LZO_CFLAGS) \
        $(OPTIONAL_LZ4_CFLAGS) \
        $(OPTIONAL_PKCS11_HELPER_CFLAGS) \
@@ -147,6 +149,8 @@
 openvpn_LDADD = \
        $(top_builddir)/src/compat/libcompat.la \
        $(SOCKETS_LIBS) \
+       $(OPTIONAL_LIBCAPNG_LIBS) \
+       $(OPTIONAL_LIBNL_GENL_LIBS) \
        $(OPTIONAL_LZO_LIBS) \
        $(OPTIONAL_LZ4_LIBS) \
        $(OPTIONAL_PKCS11_HELPER_LIBS) \

--
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Gerrit-Project: openvpn
Gerrit-Branch: master
Gerrit-Change-Id: I39a6f58b11b922f5dbd3e55a5bc8574eda8a83fe
Gerrit-Change-Number: 724
Gerrit-PatchSet: 1
Gerrit-Owner: flichtenheld <fr...@lichtenheld.com>
Gerrit-Reviewer: plaisthos <arne-open...@rfc2549.org>
Gerrit-CC: openvpn-devel <openvpn-devel@lists.sourceforge.net>
Gerrit-Attention: plaisthos <arne-open...@rfc2549.org>
Gerrit-MessageType: newchange
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