build: use net-snmp-config to configure NetSNMP
The correct method to link to NetSNMP is to use net-snmp-config (which
is like pkg-config). Explicit link to libcrypto is also dropped
(NetSNMP libs are linked to libcrypto, no need to link Quagga to
it). Moreover, @SNMP_INCLUDES@ is dropped because useless. Due to a
bug in configure.ac, it was properly populated.
diff --git a/vtysh/extract.pl.in b/vtysh/extract.pl.in
index 99224f8..2dbaf0a 100755
--- a/vtysh/extract.pl.in
+++ b/vtysh/extract.pl.in
@@ -63,7 +63,7 @@
foreach (@ARGV) {
$file = $_;
- open (FH, "cpp -DHAVE_CONFIG_H -DVTYSH_EXTRACT_PL -DHAVE_IPV6 -I@top_builddir@ -I@srcdir@/ -I@srcdir@/.. -I@top_srcdir@/lib -I@top_builddir@/lib -I@top_srcdir@/isisd/topology @SNMP_INCLUDES@ @CPPFLAGS@ $file |");
+ open (FH, "cpp -DHAVE_CONFIG_H -DVTYSH_EXTRACT_PL -DHAVE_IPV6 -I@top_builddir@ -I@srcdir@/ -I@srcdir@/.. -I@top_srcdir@/lib -I@top_builddir@/lib -I@top_srcdir@/isisd/topology @CPPFLAGS@ $file |");
local $/; undef $/;
$line = <FH>;
close (FH);