head -r358966 on aarch64 fails to build base/gcc6: fatal error: bracket nesting level exceeded maximum of 256

[Mark Millard]

While trying to build base/gcc6 on aarch64 (implicitly targeting aarch64:
self hosted), it failed with:

. . .
c++: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
/wrkdirs/usr/ports/base/gcc6/work/gcc-6.5.0/gcc/config/aarch64/aarch64.md:817:10873: fatal error: bracket nesting level exceeded maximum of 256
/wrkdirs/usr/ports/base/gcc6/work/gcc-6.5.0/gcc/config/aarch64/aarch64.md:817:10873: note: use -fbracket-depth=N to increase maximum nesting level
116 warnings and 1 error generated.
gmake[2]: *** [Makefile:1086: insn-attrtab.o] Error 1
gmake[2]: *** Waiting for unfinished jobs....
. . .

amd64 (implicitly targeting amd64: self hosted) did not have the problem.

(These were just build-ability tests, no intent to install as stands.)

base/binutils did not have such problems. (Actually installed on 32-bit
powerpc so more ports can build.)

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)