diff --git a/Makefile.in b/Makefile.in
index c6327d2..3355762 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -51,14 +51,22 @@ all: static
 install: install-clean install-static
 endif
 
+ifneq ($(strip $(CFLAGS)),)
+CARGS := -cargs $(CFLAGS)
+endif
+
+ifneq ($(strip $(LDFLAGS)),)
+LARGS := -largs $(LDFLAGS)
+endif
+
 static:
-	${GPRBUILD} -p -XLIBRARY_TYPE=static ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=static ${GPROPTS} xmlada.gpr $(CARGS) $(LARGS)
 
 shared relocatable:
-	${GPRBUILD} -p -XLIBRARY_TYPE=relocatable ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=relocatable ${GPROPTS} xmlada.gpr $(CARGS) $(LARGS)
 
 static-pic:
-	${GPRBUILD} -p -XLIBRARY_TYPE=static-pic ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=static-pic ${GPROPTS} xmlada.gpr $(CARGS) $(LARGS)
 
 # Rebuild the tests (and not the XML/Ada code itself)
 test: force