Re: [PATCH] gnu: cross-gcc-arguments: Disable libitm, libvtv and, libsanitizer.

[Manolis Ragkousis <manolis837@gmail.com>]

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Hello everyone

This is a follow up to better explain what the problem is with the
sans-libc cross gcc in the (gnu packages cross-base) module.

In the latest master if you try to build gcc-cross-sans-libc with:

./pre-inst-env guix build -e '((@@(gnu packages cross-base) cross-gcc)
"i686-linux-gnu")' -c8

gcc modules libitm, libvtv and libsanitizer fail to build with
"configure: error: C compiler cannot create executables".

This happens because there is no libc present at that point and the
problem was introduced with commit ca7ef4d41854218c which enabled c++.

At that stage no linking can happen so the best solution is to just
disable the modules. It does not affect anything after that.

I am attaching the build.log so anybody can see for himself. :-)

If okay I will push the patch to master.

Manolis

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From be59086da781969e82d0bb9fb9fff851d51faa65 Mon Sep 17 00:00:00 2001
From: Manolis Ragkousis <manolis837@gmail.com>
Date: Tue, 16 Feb 2016 15:06:33 +0200
Subject: [PATCH] gnu: cross-gcc-arguments: Disable libitm, libvtv and
 libsanitizer.

* gnu/packages/cross-base.scm (cross-gcc-arguments)[arguments]: Add
  "--disable-libitm", "--disable-libvtv" and "--disable-libsanitizer"
  when libc is not present.
---
 gnu/packages/cross-base.scm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
index 8bd599c..bbc1c48 100644
--- a/gnu/packages/cross-base.scm
+++ b/gnu/packages/cross-base.scm
@@ -120,6 +120,9 @@ may be either a libc package or #f.)"
                                "--disable-libquadmath"
                                "--disable-decimal-float" ;would need libc
                                "--disable-libcilkrts"
+                               "--disable-libitm"
+                               "--disable-libvtv"
+                               "--disable-libsanitizer"
                                )))
 
                  ,(if libc
-- 
2.7.1