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| author | fanquake <fanquake@gmail.com> | 2020-06-29 11:24:25 +0800 |
|---|---|---|
| committer | fanquake <fanquake@gmail.com> | 2020-06-29 11:31:17 +0800 |
| commit | 9952242c03fe587b5dff46a9f770e319146103bf (patch) | |
| tree | 6177b4850642e0ed13144fe421cd2b3dc07e6497 /build_msvc | |
| parent | d3a5dbfd1f18b89dd990ee83ece7c1dd9ba94b1a (diff) | |
| download | bitcoin-9952242c03fe587b5dff46a9f770e319146103bf.tar.xz | |
build: improve builtin_clz* detection
The way we currently test with AC_CHECK_DECLS do 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.
Diffstat (limited to 'build_msvc')
| -rw-r--r-- | build_msvc/bitcoin_config.h | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/build_msvc/bitcoin_config.h b/build_msvc/bitcoin_config.h index 35ba8425b3..fbbe1a2156 100644 --- a/build_msvc/bitcoin_config.h +++ b/build_msvc/bitcoin_config.h @@ -137,18 +137,6 @@ don't. */ #define HAVE_DECL_STRNLEN 1 -/* Define to 1 if you have the declaration of `__builtin_clz', and to 0 if you - don't. */ -//#define HAVE_DECL___BUILTIN_CLZ 1 - -/* Define to 1 if you have the declaration of `__builtin_clzl', and to 0 if - you don't. */ -//#define HAVE_DECL___BUILTIN_CLZL 1 - -/* Define to 1 if you have the declaration of `__builtin_clzll', and to 0 if - you don't. */ -//#define HAVE_DECL___BUILTIN_CLZLL 1 - /* Define to 1 if you have the <dlfcn.h> header file. */ /* #undef HAVE_DLFCN_H */ |