On 04/25/2016 09:49 AM, Martin Liška wrote:
Hello.
To make LTO wrappers (gcc-nm, gcc-ar, gcc-ranlib) more smart, I would like to
prevent execution
of the same binary by these wrapper. For LTO testing I symlink ar (nm, ranlib)
to these wrappers instead
of hacking a build system to respect NM (AR, RANLIB) environment variables. The
only problem with that solution
is that these wrappers recursively executes themselves as the first folder in
PATH is set to the location with wrappers.
Following patch presents such recursion.
Patch can bootstrap®test on x86_64-linux-gnu.
Ready for trunk?
Thanks,
Martin
0001-Prevent-LTO-wrappers-to-process-a-recursive-executio.patch
From dfe0486ad7babe3d6de349001d4790684dc94bfb Mon Sep 17 00:00:00 2001
From: marxin <[email protected]>
Date: Fri, 22 Apr 2016 17:57:23 +0200
Subject: [PATCH] Prevent LTO wrappers to process a recursive execution
gcc/ChangeLog:
2016-04-22 Martin Liska <[email protected]>
* file-find.c (remove_prefix): New function.
* file-find.h (remove_prefix): Declare the function.
* gcc-ar.c (main): Skip a folder of the wrapper if
a wrapped binary would point to the same file.
Is this still something you want to pursue? It looks pretty reasonable
and one could make an argument that it's a good idea in and of itself.
jeff
