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| author |   Michał Górny <mgorny@gentoo.org> | 2023-12-25 15:45:59 +0100 |
|---|---|---|
| committer | Michał Górny <mgorny@gentoo.org> | 2023-12-26 15:02:09 +0100 |
| commit | 2aea6c3ff2181ad96187e456a3307609fd288d4c (patch) | |
| tree | c300543f72074afb4606334811eb24721116c688 /metadata/md5-cache/net-misc/wget-1.21.4 | |
| parent | dev-libs/dynolog: remove Werror option (diff) | |
| download | gentoo-2aea6c3ff2181ad96187e456a3307609fd288d4c.tar.gz gentoo-2aea6c3ff2181ad96187e456a3307609fd288d4c.tar.bz2 gentoo-2aea6c3ff2181ad96187e456a3307609fd288d4c.zip | |
toolchain-funcs.eclass: Add tc-is-lto function
Add a function to check whether the C compiler is using LTO.
To determine this, we compile a dummy source unit. In the GCC case,
we check whether the resulting object file contains ".gnu.lto*"
sections. In the clang case, we check whether a valid LLVM bytecode
file was output rather than a regular object.
The goal of this change is to reduce the amount of USE=lto abuse,
and have a consistent cross-package way of enabling LTO via setting
appropriate CFLAGS and CXXFLAGS.
Closes: https://github.com/gentoo/gentoo/pull/34470
Signed-off-by: Michał Górny <mgorny@gentoo.org>
Diffstat (limited to 'metadata/md5-cache/net-misc/wget-1.21.4')
0 files changed, 0 insertions, 0 deletions