Comment # 12 on bug 1152590 from Jiri Slaby

(In reply to Jiri Slaby from comment #11)
> export NO_BRP_STRIP_DEBUG=true
> export NO_DEBUGINFO_STRIP_DEBUG=true
> %define __debug_install_post %{nil}

Commenting these 3 lines frees 500M on disk and the linked binary (using such
built toolchain) has the same md5 hash.

They were added in rev 40 of gcc5:
osc rdiff -c 40 devel:gcc gcc5

+Tue Apr  7 09:55:38 UTC 2015 - afaerber@suse.de
+
+- Prepare for non-icecream cross-compilers
+* Define sysroot to match cross-binutils config
+* Prepare for requiring cross-newlib for some targets
+* Use all-host target for libc bootstrap, too
+* Install target files, but suppress stripping them (breaks them)
+* Suppress -icecream-backend subpackage
+* Allow building on any architecture


(In reply to Michael Matz from comment #9)
> Yeah, but as I used a slightly different approach than you please test those
> binutils as well.

It still works.