From 0801a066cd4a24a858ddfa7c62c7802e0f5533a8 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN" <yann.morin.1998@free.fr>
Date: Sun, 14 Aug 2016 12:15:17 +0200
Subject: [PATCH] configure: do not check for libbsd

libbsd causes build issues because its libbsd-overlay.pc file is borked:
it contains -isystem in CFLAGS, which is not munged by pkgconf, so we
end up using the headers of the build machine, causing all sorts of
hard-to-debug trouble at build time.

lldpd uses libbsd-overlay for a few helper functions, but has fallbacks
in case it is not available. The only feature that is lost when not using
it is that the neighbour name is no longer displayed in /proc/self/cmdline.
As the author of lldpd said on IRC: "people should survive! ;-)"

So we just remove the detection of libbsd altogether.

Fixes:
    http://autobuild.buildroot.org/results/6b7/6b70fa379e834ec71cc260ba6af771b531ca3511/
    http://autobuild.buildroot.org/results/769/769074c4bb67336ae6679f2c1cd2a8220d2bec24/
    http://autobuild.buildroot.org/results/c8a/c8a6001f437701ecc75f6c9252935645bda8a8c8/
    [...]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
---
 configure.ac | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/configure.ac b/configure.ac
index dd723b0..45498ce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -165,25 +165,6 @@ AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 AC_FUNC_FORK
 
-# Some functions can be in libbsd
-PKG_CHECK_MODULES([libbsd], [libbsd-overlay], [
-  _save_CFLAGS="$CFLAGS"
-  _save_LIBS="$LIBS"
-  CFLAGS="$CFLAGS $libbsd_CFLAGS"
-  LIBS="$LIBS $libbsd_LIBS"
-  AC_MSG_CHECKING([if libbsd can be linked correctly])
-  AC_LINK_IFELSE([AC_LANG_SOURCE([[int main() { return 0; }]])],
-    [
-      AC_MSG_RESULT(yes)
-      LLDP_CFLAGS="$LLDP_CFLAGS $libbsd_CFLAGS"
-      LLDP_LDFLAGS="$LLDP_LDFLAGS $libbsd_LIBS"
-    ],[
-      AC_MSG_RESULT(no)
-      CFLAGS="$_save_CFLAGS"
-      LIBS="$_save_LIBS"
-    ])
-], [:])
-
 # setproctitle may have an _init function
 AC_REPLACE_FUNCS([setproctitle])
 AC_CHECK_FUNCS([setproctitle_init])
-- 
2.7.4