[Bug 1769939] [NEW] Compiling failed with gcc -B option on Ubuntu 18.04 update

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--Problem Description-- 
Compiling failed with -B on Ubuntu 18.04 updated kernel. The gcc -B option does not recognize the custom ld script.. 

---Issue observed---
# gcc -m64 -B ./obj64  -L../obj64 -o obj64/linkhuge_rw -Wl,--no-as-needed -lpthread -ldl -lhugetlbfs_privutils -Wl,--hugetlbfs-align obj64/linkhuge_rw.o obj64/testutils.o
/usr/bin/powerpc64le-linux-gnu-ld: unrecognized option '--hugetlbfs-align'
/usr/bin/powerpc64le-linux-gnu-ld: use the --help option for usage information
collect2: error: ld returned 1 exit status

---Env details---

Hardware: Tuleta
DD revision: 2,1
Operating Env.: Power KVM/BML
Host OS version:

# uname -a
Linux lep8d 4.15.0-20-generic #16-Ubuntu SMP Wed Apr 4 13:57:51 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux

----Additional Info-----
Note:
It was working on 18 04 till "4.15.0-15-generic" kernel and does not work on gcc built with ld on  any update after 4.15.0-15 kernel. 

>From doc:
For each subprogram to be run, the compiler driver first tries the
     '-B' prefix, if any.

Reproducible : 100%

---Steps to Reproduce---
1. git clone https://github.com/libhugetlbfs/libhugetlbfs.git
2. apt install libpthread-stubs0-dev
3. Apply the patches specific to power.
patch -p1 < ppc.patch
ppc.patch : https://bugzilla.linux.ibm.com/attachment.cgi?id=121185

4. Run make and make check.
make BUILDTYPE=NATIVEONLY
(and/or)
4.cd tests; 
gcc -m64 -B ./obj64  -L../obj64 -o obj64/linkhuge_rw -Wl,--no-as-needed -lpthread -ldl -lhugetlbfs_privutils -Wl,--hugetlbfs-align obj64/linkhuge_rw.o obj64/testutils.o
/usr/bin/powerpc64le-linux-gnu-ld: unrecognized option '--hugetlbfs-align'
/usr/bin/powerpc64le-linux-gnu-ld: use the --help option for usage information
collect2: error: ld returned 1 exit status

---Expected---
Compilation to succeed.

== Comment: #1 - William J. Schmidt <wschmidt at us.ibm.com> - 2018-05-07 11:10:59 ==
Ubuntu is aware and has fixed this in their 18.10 code base, with backport to 18.04 coming.  I've asked Segher to run down a little more information for you.

== Comment: #3 - Segher Boessenkool <segher.boessenkool at nl.ibm.com> - 2018-05-07 11:23:27 ==
This is fixed here:

https://anonscm.debian.org/viewvc/gcccvs?view=revision&revision=10188

so should be available pretty soon.

** Affects: gcc-defaults (Ubuntu)
     Importance: Undecided
     Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
         Status: New


** Tags: architecture-ppc64le bugnameltc-167514 severity-high targetmilestone-inin1804
-- 
Compiling failed with gcc -B option on Ubuntu 18.04 update
https://bugs.launchpad.net/bugs/1769939
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