Exit when required parameters not provided to win32/Makefile.gcc.

diff --git a/win32/Makefile.gcc b/win32/Makefile.gcc
index fddd78a..c4a6589 100644 (file)
--- a/win32/Makefile.gcc
+++ b/win32/Makefile.gcc
@@ -123,6 +123,10 @@ zlibrc.o: win32/zlib1.rc
 .PHONY: install uninstall clean
 
 install: zlib.h zconf.h $(STATICLIB) $(IMPLIB)
+       @if test -z "$(INCLUDE_PATH)" -o -z "$(LIBRARY_PATH)" -o -z "$(BINARY_PATH)"; then \
+               echo INCLUDE_PATH, LIBRARY_PATH, and BINARY_PATH must be specified; \
+               exit 1; \
+       fi
        -@mkdir -p $(INCLUDE_PATH)
        -@mkdir -p $(LIBRARY_PATH) $(LIBRARY_PATH)/pkgconfig
        -if [ "$(SHARED_MODE)" = "1" ]; then \