[Xorp-hackers] Unable to compile on Gentoo stage3 x86 virtual machine

[Ben Greear]

On 03/21/2012 03:44 PM, David Davidson wrote:
> Hi,
>
> Thank you so much for your work and dedication to the XORP project! I am so pleased with this work and I wanted to say that I think it's the best routing
> software one can get in the free world, and it rivals commercial routing in a big way, hands-down. My hat is off to those developers and maintainers that are
> supporting this project and again, many kind thanks for working on this exciting project.
>
> I am hoping that somebody will be able to give me some help or point me in the right direction to get a problem fixed that I am seeing. I am trying to get XORP
> v.1.8.5 compiled on a recent Gentoo GNU/Linux virtual machine instance but I am unable to get it compiled. I am running the following command from the root of
> the source release:
>
>
> scons prefix=/usr sysconfdir=/etc/xorp localstatedir=/var/lib/xorp
>
>
> I am getting the following error message and then compilation terminates:
>
> ################################################
> g++ -o obj/i686-pc-linux-gnu/policy/backend/lex.yy_policy_backend_parser.os -c -O2 -g3 -Werror -W -Wall -Wwrite-strings -Wcast-qual -Wpointer-arith -Wcast-align
> -Woverloaded-virtual -ftemplate-depth-25 -pipe -DXORP_BUILDINFO -fPIC -DXRL_PF=120 -DXORP_VERSION=1.8.5 -Iobj/i686-pc-linux-gnu -I. -I.
> policy/backend/lex.yy_policy_backend_parser.cc
> cc1plus: warnings being treated as errors
> backend.l: In function 'int yy_policy_backend_parserlex()':
> backend.l:96:5: error: ignoring return value of 'size_t fwrite(const void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result
> scons: *** [obj/i686-pc-linux-gnu/policy/backend/lex.yy_policy_backend_parser.os] Error 1
> scons: building terminated because of errors.
> ################################################

We probably just need to find everywhere that calls fwrite and check it's
return value.

In the git tree, there is an option:  scons disable_werror=true

that should let it compile, but we should fix the root cause as well.

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com