diff options
author | Wladimir J. van der Laan <laanwj@protonmail.com> | 2020-06-29 15:49:04 +0200 |
---|---|---|
committer | Wladimir J. van der Laan <laanwj@protonmail.com> | 2020-06-29 15:49:08 +0200 |
commit | 1269cab21a9ac32f9ee8adfb9041950756eff3e4 (patch) | |
tree | 0aa35bf319bc051a9536d14730ae976435ba37ea /.travis.yml | |
parent | 8edfc1715a02cbaf52420d3c4e71f67ff9af0b41 (diff) | |
parent | 9952242c03fe587b5dff46a9f770e319146103bf (diff) | |
download | bitcoin-1269cab21a9ac32f9ee8adfb9041950756eff3e4.tar.xz |
Merge #19403: build: improve __builtin_clz* detection
9952242c03fe587b5dff46a9f770e319146103bf build: improve builtin_clz* detection (fanquake)
Pull request description:
Fixes #19402.
The way we currently test for `__builtin_clz*` support with `AC_CHECK_DECLS` does not work with Clang:
```bash
configure:21492: clang++-10 -std=c++11 -c -g -O2 -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS conftest.cpp >&5
conftest.cpp:100:10: error: builtin functions must be directly called
(void) __builtin_clz;
^
1 error generated.
```
This also removes the `__builtin_clz()` check, as we don't actually use it anywhere, and it's trvial to re-add detection if we do start using it at some point. If this is controversial then I'll add a test for it as well.
ACKs for top commit:
sipa:
ACK 9952242c03fe587b5dff46a9f770e319146103bf
laanwj:
ACK 9952242c03fe587b5dff46a9f770e319146103bf
Tree-SHA512: 695abb1a694a01a25aaa483b4fffa7d598842f2ba4fe8630fbed9ce5450b915c33bf34bb16ad16a16b702dd7c91ebf49fe509a2498b9e28254fe0ec5177bbac0
Diffstat (limited to '.travis.yml')
0 files changed, 0 insertions, 0 deletions