--- xmlada-2016-src/Makefile.in.old	2016-12-04 21:58:57.251338692 +0100
+++ xmlada-2016-src/Makefile.in	2016-12-04 21:59:31.332755615 +0100
@@ -7,7 +7,7 @@
 PACKAGE_TARNAME=@PACKAGE_TARNAME@
 VERSION=@PACKAGE_VERSION@
 BUILDS_SHARED=@GNAT_BUILDS_SHARED@
-prefix=@prefix@
+prefix=$(DESTDIR)@prefix@
 
 # Set a default value (ignored if set in the environment)
 PROCESSORS?=0
@@ -49,13 +49,13 @@
 endif
 
 static:
-	${GPRBUILD} -p -XLIBRARY_TYPE=static ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=static ${GPROPTS} xmlada.gpr -cargs $(ADAFLAGS)
 
 shared relocatable:
-	${GPRBUILD} -p -XLIBRARY_TYPE=relocatable ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=relocatable ${GPROPTS} xmlada.gpr -cargs $(ADAFLAGS)
 
 static-pic:
-	${GPRBUILD} -p -XLIBRARY_TYPE=static-pic ${GPROPTS} xmlada.gpr
+	${GPRBUILD} -p -XLIBRARY_TYPE=static-pic ${GPROPTS} xmlada.gpr -cargs $(ADAFLAGS)
 
 # Rebuild the tests (and not the XML/Ada code itself)
 test: force
--- xmlada-gpl-2016-src/shared.gpr.in.old	2017-03-26 21:48:46.613541125 +0200
+++ xmlada-gpl-2016-src/shared.gpr.in	2017-03-26 21:49:32.713754025 +0200
@@ -76,6 +76,7 @@
          when "profile" =>
             for Switches ("Ada") use warnings & ("-g", "-pg");
       end case;
+      for Driver ("Ada") use External ("ADA", "gcc");
    end compiler;
 
    package binder is