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-rw-r--r--VisualNaCro/Makefile.am1
1 files changed, 1 insertions, 0 deletions
diff --git a/VisualNaCro/Makefile.am b/VisualNaCro/Makefile.am
index 5ad3f0d..7b1fe67 100644
--- a/VisualNaCro/Makefile.am
+++ b/VisualNaCro/Makefile.am
@@ -37,6 +37,7 @@ PERL5_CCFLAGS = @PERL5CCFLAGS@
# ----------------------------------------------------------------
$(ISRCS): $(INTERFACE)
+ @test -n "$(SWIG)" || (echo "Need SWIG" && exit 1)
$(SWIG) -perl5 $(SWIGOPT) $(INTERFACE)
$(OBJS): $(SRCS) $(INTERFACE)