[Concurrency] Avoid using asl_log when not available (#41277)

Author: kubamracek

stdlib/public/Concurrency/Actor.cpp

@@ -50,7 +50,7 @@
 #include <dispatch/dispatch.h>
 #endif
 
-#if defined(__APPLE__)
+#if SWIFT_STDLIB_HAS_ASL
 #include <asl.h>
 #elif defined(__ANDROID__)
 #include <android/log.h>
@@ -60,12 +60,6 @@
 #include <unwind.h>
 #endif
 
-#if defined(__APPLE__)
-#include <asl.h>
-#elif defined(__ANDROID__)
-#include <android/log.h>
-#endif
-
 #if defined(__ELF__)
 #include <sys/syscall.h>
 #endif
@@ -399,9 +393,10 @@ void swift::swift_task_reportUnexpectedExecutor(
 #define STDERR_FILENO 2
   _write(STDERR_FILENO, message, strlen(message));
 #else
-  write(STDERR_FILENO, message, strlen(message));
+  fputs(message, stderr);
+  fflush(stderr);
 #endif
-#if defined(__APPLE__)
+#if SWIFT_STDLIB_HAS_ASL
   asl_log(nullptr, nullptr, ASL_LEVEL_ERR, "%s", message);
 #elif defined(__ANDROID__)
   __android_log_print(ANDROID_LOG_FATAL, "SwiftRuntime", "%s", message);

stdlib/public/Concurrency/TaskLocal.cpp

@@ -26,7 +26,7 @@
 #include "TaskPrivate.h"
 #include <set>
 
-#if defined(__APPLE__)
+#if SWIFT_STDLIB_HAS_ASL
 #include <asl.h>
 #elif defined(__ANDROID__)
 #include <android/log.h>
@@ -299,9 +299,10 @@ static void swift_task_reportIllegalTaskLocalBindingWithinWithTaskGroupImpl(
   #define STDERR_FILENO 2
   _write(STDERR_FILENO, message, strlen(message));
 #else
-  write(STDERR_FILENO, message, strlen(message));
+  fputs(message, stderr);
+  fflush(stderr);
 #endif
-#if defined(__APPLE__)
+#if SWIFT_STDLIB_HAS_ASL
   asl_log(nullptr, nullptr, ASL_LEVEL_ERR, "%s", message);
 #elif defined(__ANDROID__)
   __android_log_print(ANDROID_LOG_FATAL, "SwiftRuntime", "%s", message);