Hello, The attached patch for libstdc++ / VxWorks helps building the library for old versions of the OS, as witnessed with VxWorks 6.9 in particular.
It explicitly requests C99 features from old system headers,
on which libstc++ relies since at least c++98. The specific
issue that exposed this was a failure to compile
libstdc++-v3/src/c++17/floating_to_chars.cc
for VxWorks 6.9 with a batch of errors such as:
error: 'FP_NAN' was not declared in this scope
The missing definitions are provided by the
system headers with guards on _HAS_C9X, which gets
internally defined when _C99 is.
Ok to commit?
Thanks in advance!
2021-12-07 Olivier Hainque <hain...@adacore.com>
libstdc++-v3/
* config/os/vxworks/os_defines.h: #define _C99.
Olivier
0001-Define-_C99-in-libstdc-vxworks-os_defines.h.patch
Description: Binary data
