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Build: Check __GLIBC__ for OpenHarmony to fix build fail. v6.0.83 (#3777)

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When I compile on OpenHarmony, I encounter an error at the
pthread_setname_np function:
```
./src/app/srs_app_threads.cpp:53:10: error: functions that differ only in their return type cannot be overloaded
void pthread_setname_np(pthread_t trd, const char* name) {
/data/local/ohos-sdk/linux/native/llvm/bin/../../sysroot/usr/include/pthread.h:379:5: note: previous declaration is here
int pthread_setname_np(pthread_t, const char *);
```

Our libc is using musl-libc and has no defined __GLIBC__, so we wanted
to add a judgment that __GLIBC__ already defined.
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terrencetang2023 2023-09-22 09:44:29 +08:00 • committed by GitHub
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commit 5b31225d7c
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trunk/src/app/srs_app_threads.cpp
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@ -49,7 +49,7 @@ using namespace std;
// These functions first appeared in glibc in version 2.12.
// See https://man7.org/linux/man-pages/man3/pthread_setname_np.3.html
#if defined(SRS_CYGWIN64) || (defined(SRS_CROSSBUILD) && ((__GLIBC__ < 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)))
#if defined(SRS_CYGWIN64) || (defined(SRS_CROSSBUILD) && defined(__GLIBC__) && ((__GLIBC__ < 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)))
void pthread_setname_np(pthread_t trd, const char* name) {
}
#endif