[Buildroot] [PATCH v2 1/2] package/pkg-autotools: don't use config.site when cross-compiling

[Romain Naour]

On fedora 20 64bits host, the file /usr/share/config.site contains
a fix for installing libraries into /lib/lib64 on 64bits systems
that redefine libdir in the generated Makefile

For safety and avoid the bug #7262 [1], disable loading this file
when running the configure script for the target and the host.

Note: configure scripts generated with autoconf < 2.65 will source
the /dev/null and print this line:
"configure: loading site script /dev/null"

[1]: https://bugs.busybox.net/show_bug.cgi?id=7262

Signed-off-by: Romain Naour <romain.naour at openwide.fr>
---
v2:
 Use /dev/null for CONFIG_SITE to avoid sourcing a file nammed "no"
 (ThomasDS and Mike Zick)
 Add a note about autoconf version
 Add reference to the bug #7262
---
 package/pkg-autotools.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/package/pkg-autotools.mk b/package/pkg-autotools.mk
index bcc648d..a424a1c 100644
--- a/package/pkg-autotools.mk
+++ b/package/pkg-autotools.mk
@@ -126,6 +126,7 @@ define $(2)_CONFIGURE_CMDS
 	$$(TARGET_CONFIGURE_OPTS) \
 	$$(TARGET_CONFIGURE_ARGS) \
 	$$($$(PKG)_CONF_ENV) \
+	CONFIG_SITE=/dev/null \
 	./configure \
 		--target=$$(GNU_TARGET_NAME) \
 		--host=$$(GNU_TARGET_NAME) \
@@ -159,6 +160,7 @@ define $(2)_CONFIGURE_CMDS
 		CFLAGS="$$(HOST_CFLAGS)" \
 		LDFLAGS="$$(HOST_LDFLAGS)" \
                 $$($$(PKG)_CONF_ENV) \
+		CONFIG_SITE=/dev/null \
 		./configure \
 		--prefix="$$(HOST_DIR)/usr" \
 		--sysconfdir="$$(HOST_DIR)/etc" \
-- 
1.9.3