Add support for DESTDIR in make install

Useful to build distribution packages.

diff --git a/Makefile b/Makefile
index 6f30a319bb4523eef423489943eb4da42c713e0b..16ad3363ac8a223ee477de73a85f75686eb28b06 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -74,12 +74,12 @@ libutf8proc.dylib: libutf8proc.$(MAJOR).dylib
        ln -f -s libutf8proc.$(MAJOR).dylib $@
 
 install: libutf8proc.a libutf8proc.$(SHLIB_EXT) libutf8proc.$(SHLIB_VERS_EXT)
-       mkdir -m 755 -p $(includedir)
-       $(INSTALL) -m 644 utf8proc.h $(includedir)
-       mkdir -m 755 -p $(libdir)
-       $(INSTALL) -m 644 libutf8proc.a $(libdir)
-       $(INSTALL) -m 755 libutf8proc.$(SHLIB_VERS_EXT) $(libdir)
-       ln -f -s $(libdir)/libutf8proc.$(SHLIB_VERS_EXT) $(libdir)/libutf8proc.$(SHLIB_EXT)
+       mkdir -m 755 -p $(DESTDIR)$(includedir)
+       $(INSTALL) -m 644 utf8proc.h $(DESTDIR)$(includedir)
+       mkdir -m 755 -p $(DESTDIR)$(libdir)
+       $(INSTALL) -m 644 libutf8proc.a $(DESTDIR)$(libdir)
+       $(INSTALL) -m 755 libutf8proc.$(SHLIB_VERS_EXT) $(DESTDIR)$(libdir)
+       ln -f -s $(libdir)/libutf8proc.$(SHLIB_VERS_EXT) $(DESTDIR)$(libdir)/libutf8proc.$(SHLIB_EXT)
 
 # Test programs