fix pkgconfig creation in makefile.shared

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

Author: sjaeckel

makefile.shared

@@ -65,7 +65,8 @@ install: $(LIBNAME)
 	install -d $(DESTDIR)$(INCPATH)
 	$(LIBTOOL) --mode=install install -m 644 $(LIBNAME) $(DESTDIR)$(LIBPATH)/$(LIBNAME)
 	install -m 644 $(HEADERS_PUB) $(DESTDIR)$(INCPATH)
-	sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION_PC),' libtommath.pc.in > libtommath.pc
+	sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION_PC),' -e 's,@CMAKE_INSTALL_LIBDIR@,lib,' \
+		-e 's,@CMAKE_INSTALL_INCLUDEDIR@/@PROJECT_NAME@,include/tommath,' libtommath.pc.in > libtommath.pc
 	install -d $(DESTDIR)$(LIBPATH)/pkgconfig
 	install -m 644 libtommath.pc $(DESTDIR)$(LIBPATH)/pkgconfig/