tinc devel - Jun 2010 - Crosscompile error tinc => 1.0.11 on openwrt whiterussian 0.9

Hello!

I try to maintain a couple off old Openwrt based routers. The routers
run openwrt whiterussian, so it quite outdated. But it is a little
dangerous to update a remote machine from whiterussian to kamikaze or
backfire, this may be usefull for others.

I used the openwrt whiterussian 0.9 sdk and the attached Makefile to
compile all tinc versions till 1.0.11. Since 1.0.11 the compile process
fails in net.c at line 470:

mipsel-linux-uclibc-gcc -DHAVE_CONFIG_H  -I.. -I../lib
-I/home/frithjof/wrt/whiterussian/OpenWrt-SDK-Linux-x86_64-1/staging_dir_mipsel/usr/include
-I/home/frithjof/wrt/whiterussian/OpenWrt-SDK-Linux-x86_64-1/staging_dir_mipsel/usr//include
-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time -DCONFDIR=\"/etc\"
-DLOCALSTATEDIR=\"/var\" -Os -pipe -mips32 -mtune=mips32
-funit-at-a-time -MT net.o -MD -MP -MF .deps/net.Tpo -c -o net.o net.c
net.c: In function `main_loop':
net.c:470: error: conflicting types for 'node'
net.c:438: error: previous declaration of 'node' was here
net.c:470: error: 'for' loop initial declaration used outside C99 mode
net.c:481: warning: assignment from incompatible pointer type
net.c:497: warning: assignment from incompatible pointer type
net.c:504: warning: assignment from incompatible pointer type
net.c:504: warning: assignment from incompatible pointer type
net.c:505: warning: assignment from incompatible pointer type
make[7]: *** [net.o] Error 1

Any Ideas?

I attached the full outputs of the compile processes for 1.0.10
(working) and 1.0.13 (failing).

Greetings
Frithjof
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On Fri, Jun 18, 2010 at 03:55:33PM +0200, Frithjof Hammer wrote:
> I used the openwrt whiterussian 0.9 sdk and the attached Makefile to
> compile all tinc versions till 1.0.11. Since 1.0.11 the compile process
> fails in net.c at line 470:
[...]
> net.c:470: error: 'for' loop initial declaration used outside C99
mode
Hm it seems the build scripts override the C99 setting. Tinc's configure
script
detects it:
> checking for mipsel-linux-gcc... mipsel-linux-uclibc-gcc
[...]
> checking for mipsel-linux-uclibc-gcc option to accept ISO C99... -std=gnu99
This will set CC to mipsel-linux-uclibc-gcc -std=gnu99 in the Makefiles.
However, later on when make is called, CC and CFLAGS are being overridden:
> make -C
/home/frithjof/wrt/whiterussian/OpenWrt-SDK-Linux-x86_64-1/build_mipsel/tinc-1.0.13
\
> 		CC=mipsel-linux-uclibc-gcc \
> 		CFLAGS="-Os -pipe -mips32 -mtune=mips32 -funit-at-a-time" \
> 	
DESTDIR="/home/frithjof/wrt/whiterussian/OpenWrt-SDK-Linux-x86_64-1/build_mipsel/tinc-1.0.13/ipkg-install"
\
> 		all install
So change the scripts you have for building tinc for OpenWRT, and make sure it
does not override CC, or find some way to add -std=gnu99 to it.

-- 
Met vriendelijke groet / with kind regards,
     Guus Sliepen <guus at tinc-vpn.org>
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