0889809c70
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.
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
//===-- Main function for implementation of base class for libc unittests -===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "LibcTest.h"
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#include "src/__support/CPP/string_view.h"
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using LIBC_NAMESPACE::cpp::string_view;
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using LIBC_NAMESPACE::testing::TestOptions;
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namespace {
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// A poor-man's getopt_long.
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// Run unit tests with --gtest_color=no to disable printing colors, or
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// --gtest_print_time to print timings in milliseconds only (as GTest does, so
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// external tools such as Android's atest may expect that format to parse the
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// output). Other command line flags starting with --gtest_ are ignored.
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// Otherwise, the last command line arg is used as a test filter, if command
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// line args are specified.
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TestOptions parseOptions(int argc, char **argv) {
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TestOptions Options;
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for (int i = 1; i < argc; ++i) {
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string_view arg{argv[i]};
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if (arg == "--gtest_color=no")
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Options.PrintColor = false;
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else if (arg == "--gtest_print_time")
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Options.TimeInMs = true;
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// Ignore other unsupported gtest specific flags.
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else if (arg.starts_with("--gtest_"))
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continue;
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else
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Options.TestFilter = argv[i];
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}
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return Options;
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}
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} // anonymous namespace
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// The C++ standard forbids declaring the main function with a linkage specifier
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// outisde of 'freestanding' mode, only define the linkage for hermetic tests.
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#if __STDC_HOSTED__
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#define TEST_MAIN int main
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#else
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#define TEST_MAIN extern "C" int main
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#endif
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TEST_MAIN(int argc, char **argv, char **envp) {
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LIBC_NAMESPACE::testing::argc = argc;
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LIBC_NAMESPACE::testing::argv = argv;
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LIBC_NAMESPACE::testing::envp = envp;
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return LIBC_NAMESPACE::testing::Test::runTests(parseOptions(argc, argv));
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}
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