[Bug target/61577] [4.9.0] can't compile on hp-ux v3 ia64

[bugzilla-gcc at thewrittenword dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61577

--- Comment #15 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to dave.anglin from comment #12)
> It might help to compile stage1 with -O2 or -Os.

How does one do this? After ./configure, "gmake CFLAGS=-Os"? BOOT_CFLAGS
applies to stage2/3.