tvl-depot/absl/copts
Loo Rong Jie 253eb74164 [CMake] Set correct flags for clang-cl (#278)
clang-cl produce binaries with MSVC ABI and wants to be as flag-compatible with pure MSVC as possible, so this leads to all sorts of weird cases.

clang-cl alias /Wall as clang's -Weverything which is way too verbose, so it needs /W3 like pure MSVC.
clang-cl only understand GCC style warning flags (-W[no]blah) and just silent drop MSVC style warning flags (/wd[num]).
clang-cl needs MSVC define flags since it is consuming the same header files as pure MSVC.
CMake set CMAKE_CXX_COMPILER_ID as Clang when clang-cl is detected, so need extra if (MSVC) to differentiate it.

We are not doing clang-cl specialization in Bazel as currently there is no reliable way to detect clang-cl in Bazel..

This PR should be NFC for LLVM/GCC users on Unix platforms.

Other changes:

Add ABSL_ prefix to variable names to avoid name collision in CMake.
2019-03-22 15:23:01 -04:00
..
AbseilConfigureCopts.cmake [CMake] Set correct flags for clang-cl (#278) 2019-03-22 15:23:01 -04:00
configure_copts.bzl [CMake] Set correct flags for clang-cl (#278) 2019-03-22 15:23:01 -04:00
copts.py [CMake] Set correct flags for clang-cl (#278) 2019-03-22 15:23:01 -04:00
generate_copts.py Export of internal Abseil changes. 2018-12-07 14:40:28 -05:00
GENERATED_AbseilCopts.cmake [CMake] Set correct flags for clang-cl (#278) 2019-03-22 15:23:01 -04:00
GENERATED_copts.bzl [CMake] Set correct flags for clang-cl (#278) 2019-03-22 15:23:01 -04:00