[gentoo-musl] Re: [GSoC] Native-clang: daily report 06/16

[Lei Zhang]

2016-06-16 23:37 GMT+08:00 Lei Zhang <zhanglei.april@×××××.com>:
> Plan for today:
> - study the _GNU_SOURCE issue in libc++
>
> Progress today:
> - figure out the set of fine-grained FTMs needed to build libcxx against musl
>
> There're still some quirks in glibc. Without _GNU_SOURCE, libcxx
> complains about not finding towctrans, wctrans, etc, which are not
> hidden by any FTM at all.

After tracking the intricate macros in glibc's headers, I found that a
bunch of symbols, including towctrans and wctrans mentioned above, are
hidden when the following condition holds:

__XOPEN_SOURCE >= 500 && !defined(_GNU_SOUREC)

while these symbols are not hidden by any macros in musl. So again,
_GNU_SOURCE seems hard to circumvent...


Lei