maint: Fix VPATH build

In a VPATH build, <config.h> is in the builddir (which automake
includes automatically), but it includes <config-post.h> from the
top source directory (which is not automatic); hence, we need to
keep the -I(top_srcdir) directive that was accidentally removed
from commit 7a879323 (the problem is not visible in an in-tree
build).

Signed-off-by: Eric Blake <eblake@redhat.com>

diff --git a/gnulib/lib/Makefile.am b/gnulib/lib/Makefile.am
index 601f74073cb0a360611e514774a7c2110181e2b0..5669551afb3875dcfadfa3c78cb1092a5ceb3155 100644 (file)
--- a/gnulib/lib/Makefile.am
+++ b/gnulib/lib/Makefile.am
@@ -26,3 +26,5 @@ SUFFIXES =
 noinst_LTLIBRARIES =
 
 include gnulib.mk
+
+AM_CPPFLAGS = -I$(top_srcdir)