253eb74164
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.
42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
"""absl specific copts.
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This file simply selects the correct options from the generated files. To
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change Abseil copts, edit absl/copts/copts.py
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"""
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load(
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"//absl:copts/GENERATED_copts.bzl",
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"ABSL_GCC_EXCEPTIONS_FLAGS",
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"ABSL_GCC_FLAGS",
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"ABSL_GCC_TEST_FLAGS",
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"ABSL_LLVM_EXCEPTIONS_FLAGS",
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"ABSL_LLVM_FLAGS",
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"ABSL_LLVM_TEST_FLAGS",
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"ABSL_MSVC_EXCEPTIONS_FLAGS",
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"ABSL_MSVC_FLAGS",
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"ABSL_MSVC_TEST_FLAGS",
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)
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ABSL_DEFAULT_COPTS = select({
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"//absl:windows": ABSL_MSVC_FLAGS,
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"//absl:llvm_compiler": ABSL_LLVM_FLAGS,
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"//conditions:default": ABSL_GCC_FLAGS,
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})
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# in absence of modules (--compiler=gcc or -c opt), cc_tests leak their copts
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# to their (included header) dependencies and fail to build outside absl
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ABSL_TEST_COPTS = ABSL_DEFAULT_COPTS + select({
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"//absl:windows": ABSL_MSVC_TEST_FLAGS,
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"//absl:llvm_compiler": ABSL_LLVM_TEST_FLAGS,
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"//conditions:default": ABSL_GCC_TEST_FLAGS,
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})
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ABSL_EXCEPTIONS_FLAG = select({
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"//absl:windows": ABSL_MSVC_EXCEPTIONS_FLAGS,
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"//absl:llvm_compiler": ABSL_LLVM_EXCEPTIONS_FLAGS,
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"//conditions:default": ABSL_GCC_EXCEPTIONS_FLAGS,
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})
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ABSL_EXCEPTIONS_FLAG_LINKOPTS = select({
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"//conditions:default": [],
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})
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