maint.mk (sc_Wundef_boolean): Skip test if no config.h.

[gnulib.git] / top / maint.mk

diff --git a/top/maint.mk b/top/maint.mk
index 67421f2..09da20a 100644 (file)
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -766,8 +766,9 @@ sc_copyright_check:
 # tests many undefined macros, and so we can't enable that option.
 # So at least preclude common boolean strings as macro values.
 sc_Wundef_boolean:
-       @grep -Ei '^#define.*(yes|no|true|false)$$' '$(CONFIG_INCLUDE)' && \
-         { echo 'Use 0 or 1 for macro values' 1>&2; exit 1; } || :
+       @test -e '$(CONFIG_INCLUDE)' &&                                 \
+          grep -Ei '^#define.*(yes|no|true|false)$$' '$(CONFIG_INCLUDE)' && \
+            { echo 'Use 0 or 1 for macro values' 1>&2; exit 1; } || :
 
 sc_vulnerable_makefile_CVE-2009-4029:
        @files=$$(find $(srcdir) -name Makefile.in);                    \