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Summary:
According to the C++ standard, The main function shall not be declared
with a linkage-specification. after some changes in
https://github.com/llvm/llvm-project/pull/101853 this started emitting
warnings when building / testing the C library. This source file is
shared with the overlay tests as well as the full build tests. The full
build tests are compiled with `-ffreestanding`, as are all the startup /
integration files. The standard says freestanding environment are all
implementation defined, so this is valid in those cases. This patch
simply prevents adding the linkage when we are compiling unit tests,
which are hosted. This is a continuation on
https://github.com/llvm/llvm-project/pull/102825.
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Reverts llvm/llvm-project#102825
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This is invalid in C++, and clang recently started warning on it as of
#101853
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These changes slighly modify the output of the unittests so that they better
match GTest, so that utilities that parse the expected output from GTest (such
as Android's unit test harness) can read the output from our unit tests.
This allows our unit tests to be run on Android devices.
Add very primitive command line parsing to:
- support --gtest_color=no to disable printing terminal colors.
- recognize --gtest_print_time and print the test time in milliseconds.
- most of our unit tests run on the order of microseconds, so its useful to
preserve the existing behavior. But upsteram GTest ONLY prints time tests
in milliseconds, and Android's atest expects to be able to parse exactly
that. Atest always passes --gtest_print_time. The word `took` is removed as
that also differs from upstream GTest, tripping up parsers.
- ignore other --gtest_* flags
Do so so that atest can parse the output correctly.
Print the test number count before
each run, so that atest can parse this value correctly.
Link: https://android-review.googlesource.com/c/platform/external/llvm-libc/+/3107252
Link: https://google.github.io/googletest/advanced.html#colored-terminal-output
Link: https://google.github.io/googletest/advanced.html#suppressing-the-elapsed-time
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This is step 4 of
https://discourse.llvm.org/t/rfc-customizable-namespace-to-allow-testing-the-libc-when-the-system-libc-is-also-llvms-libc/73079
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A convenience wrapper name `add_libc_test` is also added which adds both
a unit test and a hermetic test. The ctype tests have been switched over
to use add_libc_test.
Reviewed By: jhuber6
Differential Revision: https://reviews.llvm.org/D148756
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This part of the effort to make all test related pieces into the `test`
directory. This helps is excluding test related pieces in a straight
forward manner if LLVM_INCLUDE_TESTS is OFF. Future patches will also move
the MPFR wrapper and testutils into the 'test' directory.
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