[Bug bootstrap/77800] New: Undefined ref to host_detect_local_cpu on netbsd/arm

[coypu at sdf dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77800

            Bug ID: 77800
           Summary: Undefined ref to host_detect_local_cpu on netbsd/arm
           Product: gcc
           Version: 5.4.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: coypu at sdf dot org
  Target Milestone: ---

Hello,

Building GCC 5.4.0 on netbsd 7.0.1 armv6hf I encounter failure like:

gcc.o:(.rodata+0x58c4): undefined reference to `host_detect_local_cpu(int, char
const**)'

I believe this is because gcc/config.host includes driver-arm.o which defines
this function only on freebsd/arm and linux/arm.

NetBSD does have a procfs which is mounted by default. it usually does include
the expected useful info on /proc/cpuinfo (although not on netbsd-7.0.1/arm,
maybe this will change in a next release).

I am working around this by excluding the prototype for this function in
gcc/config/arm/arm.h.

I don't believe any of this has changed in GCC 5.4.1, but did not try to build
it yet.