On Tue, Apr 29, 2014 at 11:32 AM, Thomas Kahle <tomka@gentoo.org> wrote:

Hi,

Hi Thomas,

I'm constantly failing at a rewrite of the ebuild for
sci-math/singular to bump it to 4.0.0. (Current version
attached). Singular has its own malloc implementation called
omalloc. The configure script there can't find ar if run from
within portage context. It does find it when run on a normal
shell. I tried tc-export AR to no avail. Any ideas?

if you open the original sources (without eautoreconf), and go inside omalloc folder, you'll find the cause in line 120 of configure.ac and/or 12977 of configure. It's hardcoded there that the script should fail if $ac_cv_prog_AR is not "ar". Here, portage already passes (even without your tc-exports etc.) the correct environment to singular's build system but "x86_64-pc-linux-gnu-ar" is not "ar". You could remove that check at all but I'm not a toolchain expert and don't know why the check is there in first place. On my box ar just links to x86_64-pc-linux-gnu-ar so no big deal.

Panagiotis (pchrist)