sysroot and json.h

[Jeffrey Bastian]

On Wed, Apr 01, 2015 at 12:58:07PM -0500, Jeffrey Bastian wrote:
> On Wed, Apr 01, 2015 at 02:48:07PM +0100, Colin Ian King wrote:
> > I suggest trying:
> > 
> > 	CFLAGS=--sysroot= ./configure
> > 
> > I don't have access to a Fedora 21 installation at hand, so I can't test
> > this out to see if it works.
> 
> That worked! Thanks!


Ok, that worked on the latest gcc in Fedora 21 (gcc-4.9.2) and in RHEL 7
(gcc-4.8.3), however I see that it fails on older gcc versions like we
have in RHEL 6 (gcc-4.4.7):

    ~]$ gcc --sysroot= -I=/usr/include/json test.c
    cc1: error: test.c/usr/local/include: Not a directory
    cc1: error: test.c/usr/include: Not a directory
    cc1: error: test.c/usr/include/json: Not a directory

And trying to set a sysroot of / also fails on RHEL 6:

    ~]$ gcc --sysroot=/ -I=/usr/include/json test.c
    /usr/bin/ld: this linker was not configured to use sysroots
    collect2: ld returned 1 exit status

For now, I'm just going to revert commit 690de7ffb96c locally when
building fwts.

Thanks,
Jeff