Merge pull request #2661 from tboerger/musl-fixes

Musl fixes

src/OSSupport/Errors.cpp

@@ -22,7 +22,7 @@ AString GetOSErrorString( int a_ErrNo)
 	
 	// According to http://linux.die.net/man/3/strerror_r there are two versions of strerror_r():
 	
-	#if !defined(__APPLE__) && defined( _GNU_SOURCE) && !defined(ANDROID_NDK)  // GNU version of strerror_r()
+	#if defined(__GLIBC__) && defined( _GNU_SOURCE) && !defined(ANDROID_NDK)  // GNU version of strerror_r()
 	
 	char * res = strerror_r( errno, buffer, ARRAYCOUNT(buffer));
 	if (res != nullptr)

src/OSSupport/StackTrace.cpp

@@ -8,7 +8,9 @@
 #ifdef _WIN32
 	#include "../StackWalker.h"
 #else
+	#ifdef __GLIBC__
 		#include <execinfo.h>
+	#endif
 	#include <unistd.h>
 #endif
 
@@ -38,12 +40,14 @@ void PrintStackTrace(void)
 		} sw;
 		sw.ShowCallstack();
 	#else
+		#ifdef __GLIBC__
 			// Use the backtrace() function to get and output the stackTrace:
 			// Code adapted from http://stackoverflow.com/questions/77005/how-to-generate-a-stacktrace-when-my-gcc-c-app-crashes
 			void * stackTrace[30];
 			btsize numItems = backtrace(stackTrace, ARRAYCOUNT(stackTrace));
 			backtrace_symbols_fd(stackTrace, numItems, STDERR_FILENO);
 		#endif
+	#endif
 }