[Buildroot] [PATCH 1/1] package/libnids: disable libnet only if not available

Guillaume W. Bres guillaume.bressaix at gmail.com
Wed Jun 24 12:17:42 UTC 2020

libnids can be built against an existing libnet lib,
take advantage of that.

Unfortunately, pkg-config is not available for libnet,
so configure --with-libnet is our only option at the

--with-libnet expects a build directory,
not an installation path like in our context.
We use --with-libnet=yes to skip tests that would fail.
In this situation, 'LIBNET' goes undefined, so we
need to define it ourselves.
This works because we make sure -lnet is installed
prior anything related to libnids.

Signed-off-by: Guillaume W. Bres <guillaume.bressaix at gmail.com>
 package/libnids/libnids.mk | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/package/libnids/libnids.mk b/package/libnids/libnids.mk
index f0330787c7..01d50879b6 100644
--- a/package/libnids/libnids.mk
+++ b/package/libnids/libnids.mk
 LIBNIDS_DEPENDENCIES = host-pkgconf libpcap
-LIBNIDS_CONF_OPTS = --disable-libnet
+# disable libnet if not available
+# Tests in configure.in expect --with-libnet=$build_dir
+# not an installation patch like in our context.
+# We use with-libnet=yes to skip the unusual paths tests.
+# But 'LNETLIB' gets left out, so we need to define it ourselves.
+ifeq ($(BR2_PACKAGE_LIBNET),y)
+LIBNIDS_CONF_OPTS += --with-libnet=yes \
+	LNETLIB=-lnet \
+	--enable-libnet
+LIBNIDS_CONF_OPTS += --disable-libnet
 # disable libglib2 if not available
 # The test in configure.in is flawed: passing --enable-libglib would also

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