In a VPATH build, <config.h> is in the builddir, but it includes <config-post.h> from the top source directory; 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(a)redhat.com&gt; --- Pushing as a build-breaker fix. gnulib/lib/Makefile.am | 2 ++ 1 file changed, 2 insertions(+) diff --git a/gnulib/lib/Makefile.am b/gnulib/lib/Makefile.am index 601f74073c..5669551afb 100644 --- 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) -- 2.20.1