https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67101
Bug ID: 67101
Summary: mprof.goc:408:5: error: calling
‘__builtin_frame_address’ with a nonzero argument is
unsafe [-Werror=frame-address]
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: gary at intrepid dot com
CC: cmang at google dot com
Target Milestone: ---
For a full bootstrap build, we also build Go and Fortran. In today's merge
with trunk, the bootstrap failed, due to this error.
/eng/upc/dev/gary/gupc-merge/src/gupc/libgo/runtime/mprof.goc: In function
‘runtime_Stack’:
/eng/upc/dev/gary/gupc-merge/src/gupc/libgo/runtime/mprof.goc:408:5: error:
calling ‘__builtin_frame_address’ with a nonzero argument is unsafe
[-Werror=frame-address]
sp = runtime_getcallersp(&b);
^
cc1: all warnings being treated as errors
make[4]: *** [mprof.lo] Error 1
make[4]: Leaving directory
`/eng/upc/dev/gary/gupc-merge/bld/packed-opt/x86_64-pc-linux-gnu/libgo'
This is likely triggered by the addition of -Wframe-address.
2015-08-02 Martin Sebor <mse...@redhat.com>
* c-family/c.opt (-Wframe-address): New warning option.
* doc/invoke.texi (Wframe-address): Document it.
* doc/extend.texi (__builtin_frame_address, __builtin_return_address):
Clarify possible effects of calling the functions with non-zero
arguments and mention -Wframe-address.
* builtins.c (expand_builtin_frame_address): Handle -Wframe-address.
