[Bug driver/68808] New: "--sysroot" not propagated to linker when "--specs" is used

[cinoltyuklair at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68808

            Bug ID: 68808
           Summary: "--sysroot" not propagated to linker when "--specs" is
                    used
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: cinoltyuklair at gmail dot com
  Target Milestone: ---

Platform: x86-64 VMware Player
OS: CRUX (GNU/Linux)
GCC 5.3.0
binutils 2.25.1

The gcc driver program fails to propagate the "--sysroot" option to the linker
when "--specs" is supplied as well.

$ cat a.c
int main(){}
$ gcc a.c --sysroot=/myos -v 2>log0
$ gcc -dumpspecs >specs
$ gcc a.c --sysroot=/myos --specs=specs -v 2>log1

Comparing log0 and log1, the last line which is the invocation to collect2 is
different only in that in log0 "--sysroot" is propagated while in log1 it is
not. I believe that this difference should not exist, given that both
invocations are using the same specs.

Apparently I can't attach multiple files so I will post logs to pastebin:
build-time config.log: http://pastebin.com/83sDq8Pv
log0: http://pastebin.com/gxYaYr94
log1: http://pastebin.com/DesvfaFu
specs: http://pastebin.com/TwVM1BVc