I'm on Arch too, see [1].

I've no problems compiling Gecko.

[1]
https://developer.mozilla.org/en-US/Firefox_OS/Firefox_OS_build_prerequisites#Arch_Linux

On 02/02/15 09:09, an wrote:
On Wednesday, January 28, 2015 at 3:26:24 PM UTC+2, Kyle Huey wrote:
That's because code was (incorrectly) checked in that requires gcc 4.7 to 
build.  Gecko is going to continue to only require 4.6 for the time being.

- Kyle





On Wed, Jan 28, 2015 at 7:07 PM, Shian-Yow Wu <[email protected]> wrote:

The MDN suggests setting gcc version to 4.6 to build Firefox OS.
   https://developer.mozilla.org/en-US/Firefox_OS/Firefox_OS_build_prerequisites
   
https://developer.mozilla.org/en-US/Firefox_OS/Customization_with_the_.userconfig_file#Changing_the_default_host_compiler

On latest mozilla central, however, when building gecko there could be error 
with this setting.
Below is the error when building gecko on Ubuntu 14.04 using gcc 4.6.
  0:09.19 ../../../../dist/include/GMPUtils.h:22:1: error: expected 
unqualified-id before 'using'

To solve this, either use gcc 4.6 with --std=c++11 option, or upgrade to gcc 
4.7 or later(thanks to Tommy Kuo for this info).

Do we still need gcc 4.6 as Firefox OS build prerequisite?  If not, probably we 
should remove this part from MDN.

--





Shian-Yow



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So what's the final word on this, can B2G be built with gcc 4.9 or not? I'm on 
Arch Linux and there seems to be some problems with gcc 4.6, must I rescue my 
Debian partition?
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