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Makes it possible to build library without linux headers installed. Wihtout build fails on including linux/perf_event.h Was noticed in alpine container where linux headers are not installed by default.
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Don't know much about cmake or meason so reused existing test only pattern |
jan-wassenberg
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Nov 11, 2026
jan-wassenberg
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jan-wassenberg
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Thanks for reporting. This is not actually test-only, and adding a separate library for this is undesirable. What we could do is gate/prevent the include:
#ifndef HWY_HAVE_PERF_COUNTERS // allow override
#if HWY_OS_LINUX || HWY_IDE
#if defined(__has_include) // note: wrapper macro fails on Clang ~17
// clang-format off
#if __has_include(<linux/perf_event.h>)
// clang-format on
#define HWY_HAVE_PERF_COUNTERS 1
#endif // __has_include
#endif // defined(__has_include)
#endif // HWY_OS_LINUX || HWY_IDE
#ifndef HWY_HAVE_PERF_COUNTERS
#define HWY_HAVE_PERF_COUNTERS 0
#endif
#endif // HWY_HAVE_PERF_COUNTERS
Would you like to make this change? If so, please also add perf_counters.h to HWY_SOURCES in CMakeLists.txt and hwy_headers in meson.build.
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Makes it possible to build library without linux headers installed. Wihtout build fails on including linux/perf_event.h
Was noticed in alpine container where linux headers are not installed by default.