build: allow configure and build in a separate directory
Some .h files in lib/ are autogenerated. The search path should
include the build directory and the source directory. They usually
match but sometimes, they may be different. For example:
$ mkdir build
$ cd build
$ ../configure
$ make
diff --git a/vtysh/Makefile.am b/vtysh/Makefile.am
index 0fd2f14..7550173 100644
--- a/vtysh/Makefile.am
+++ b/vtysh/Makefile.am
@@ -1,6 +1,6 @@
## Process this file with Automake to create Makefile.in
-INCLUDES = @INCLUDES@ -I$(top_srcdir) -I$(top_srcdir)/lib
+INCLUDES = @INCLUDES@ -I$(top_srcdir) -I$(top_srcdir)/lib -I$(top_builddir)/lib
DEFS = @DEFS@ -DSYSCONFDIR=\"$(sysconfdir)/\"
LIBS = @LIBS@ @CURSES@ @LIBPAM@
diff --git a/vtysh/extract.pl.in b/vtysh/extract.pl.in
index 61b2d2a..99224f8 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_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 @SNMP_INCLUDES@ @CPPFLAGS@ $file |");
local $/; undef $/;
$line = <FH>;
close (FH);