Makefile.am: Fix out-of-tree builds.

Fixes: #2602

diff --git a/Makefile.am b/Makefile.am
index ae027a3..91e4b46 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -516,6 +516,7 @@ liboconfig_la_SOURCES = \
        src/liboconfig/aux_types.h \
        src/liboconfig/scanner.l \
        src/liboconfig/parser.y
+liboconfig_la_CPPFLAGS = -I$(srcdir)/src/liboconfig $(AM_CPPFLAGS)
 liboconfig_la_LDFLAGS = -avoid-version $(LEXLIB)