[master] d49afc0 distcheck: use the original CFLAGS for the inner configure

[Nils Goroll]

commit d49afc041773f915e74a82c962063edde3e1d9eb
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Thu Dec 8 15:45:13 2016 +0100

    distcheck: use the original CFLAGS for the inner configure
    
    The previous commit did not solve the issue for all cases
    - we also change OFLAGS in configure

diff --git a/Makefile.am b/Makefile.am
index c713812..4c97327 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,7 +22,7 @@ DISTCHECK_CONFIGURE_FLAGS = \
     --enable-developer-warnings \
     --enable-debugging-symbols \
     --enable-dependency-tracking \
-    CFLAGS="$(OCFLAGS)"
+    CFLAGS="$(EXTCFLAGS)"
 
 install-data-local:
 	$(install_sh) -d -m 0755 $(DESTDIR)$(localstatedir)/varnish
diff --git a/configure.ac b/configure.ac
index 1957718..27cf34e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,7 +10,10 @@ AC_CONFIG_AUX_DIR([build-aux])
 AC_USE_SYSTEM_EXTENSIONS
 
 # save command line CFLAGS for use in VCC_CC (to pass through things like -m64)
+# and make distcheck configure
 OCFLAGS="$CFLAGS"
+EXTCFLAGS="$CFLAGS"
+AC_SUBST(EXTCFLAGS)
 
 AC_CANONICAL_SYSTEM
 AC_LANG(C)