This fixes spurious complaints about PIC mode not supported on "gcc --help=...", on VxWorks without -mrtp. The spurious message is emitted by vxworks_override_options, called with flag_pic == -1 when we're running for --help.
The change simply adjusts the check testing for "we're generating pic code"
to "flag_pic > 0" instead of just "flag_pic". We're not generating code at
all when reaching here with -1.
Tested by verifying that the spurious message goes away in
production gcc-9 based toolchains for more than a year now, and
sanity checked that I can build a mainline compiler with the
patch applied.
Committing to mainline shortly.
Olivier
2020-09-24 Olivier Hainque <hain...@adacore.com>
* config/vxworks.c (vxworks_override_options): Guard pic checks with
flag_pic > 0 instead of just flag_pic.
0001-Tigthen-flag_pic-processing-in-vxworks_override_o.diff
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