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Switch to putenv to fix compilation with llvm-mingw #6101

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Merged
nihui merged 1 commit into from
Jun 2, 2025
Merged

Switch to putenv to fix compilation with llvm-mingw #6101

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4 changes: 2 additions & 2 deletions src/cpu.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -163,13 +163,13 @@ __attribute__((constructor)) void ncnn_kmp_env_initializer()
// ref KMPNativeAffinity::get_system_affinity/set_system_affinity in openmp/runtime/src/kmp_affinity.h
// and cpu core goes offline in powersave mode on android, which triggers abort
// disable affinity capability, we handle thread affinity for openmp threads
setenv("KMP_AFFINITY", "disabled", 1);
putenv("KMP_AFFINITY=disabled");

// openmp initialization triggers abort when another openmp runtime detected
// ref __kmp_register_library_startup in openmp/runtime/src/kmp_runtime.cpp
// this happens when loading multiple libraries that are static linked openmp
// just let it continue to work, it works well in most cases, at least it won't crash unexpectedly
setenv("KMP_DUPLICATE_LIB_OK", "1", 1);
putenv("KMP_DUPLICATE_LIB_OK=1");
}
#endif

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