Bug 530456

Summary:	sys-apps/kmod-19 fails to compile with gcc-4.8.3 because of unrecognized command line option '-fdiagnostics-color=auto'
Product:	Gentoo Linux	Reporter:	drhopfen <smaarster>
Component:	[OLD] Core system	Assignee:	Gentoo Linux bug wranglers <bug-wranglers>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	bkohler
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info build.log config.log

Description drhopfen 2014-11-24 20:03:53 UTC

When trying to emerge sys-apps/kmod-19 it fails in the configuration phase with the message:

x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-fdiagnostics-color=auto'

This seems to be an option introduced by gcc-4.9 which is masked.

Reproducible: Always

Steps to Reproduce:
1. emerge sys-apps/kmod:19

Actual Results:  
Build fails while running ./configure

Expected Results:  
compilation and installation of kmod

Comment 1 drhopfen 2014-11-24 20:04:52 UTC

Created attachment 390218 [details]
emerge --info

Comment 2 drhopfen 2014-11-24 20:05:51 UTC

Created attachment 390220 [details]
build.log

Comment 3 Ben Kohler gentoo-dev

2014-11-24 20:17:13 UTC

checking if x86_64-pc-linux-gnu-gcc -std=gnu99 supports flag -fdiagnostics-color=auto in envvar CFLAGS... yes


Can you also attach config.log so we can see what's going on with this test?  On my gcc-4.8.3 setup, I get "... no", I wonder why you get "... yes"

Comment 4 drhopfen 2014-11-24 21:14:03 UTC

Created attachment 390226 [details]
config.log

Comment 5 Ben Kohler gentoo-dev

2014-11-24 21:39:31 UTC

This is a ccache problem, when ccache is enabled that test gives a bogus result.

Comment 6 drhopfen 2014-11-24 21:46:34 UTC

Thank you, emerging without ccache solved the problem. Should I file this as a ccache bug?

Comment 7 Jeroen Roovers (RETIRED) gentoo-dev

2014-11-25 08:32:47 UTC


*** This bug has been marked as a duplicate of bug 530200 ***