Only #include <signal.h> and require SA_RESTART when building with JSC_MULTIPLE_THREADS

https://bugs.webkit.org/show_bug.cgi?id=66617

Both <signal.h> and SA_RESTART usage are guarded behind ENABLE(JSC_MULTIPLE_THREADS).
But we cause a compile error if the platform doesn't support SA_RESTART regardless of
whether JSC_MULTIPLE_THREADS is enabled for the port. Instead, we shouldn't require
SA_RESTART support unless we are building with JSC_MULTIPLE_THREADS enabled.

Reviewed by Antonio Gomes.

* heap/MachineStackMarker.cpp:


git-svn-id: svn://svn.chromium.org/blink/trunk@93467 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/JavaScriptCore/ChangeLog

+2011-08-19  Daniel Bates  <dbates@webkit.org>
+
+        Only #include <signal.h> and require SA_RESTART when building with JSC_MULTIPLE_THREADS
+        https://bugs.webkit.org/show_bug.cgi?id=66617
+
+        Both <signal.h> and SA_RESTART usage are guarded behind ENABLE(JSC_MULTIPLE_THREADS).
+        But we cause a compile error if the platform doesn't support SA_RESTART regardless of
+        whether JSC_MULTIPLE_THREADS is enabled for the port. Instead, we shouldn't require
+        SA_RESTART support unless we are building with JSC_MULTIPLE_THREADS enabled.
+
+        Reviewed by Antonio Gomes.
+
+        * heap/MachineStackMarker.cpp:
+
 2011-08-19  Filip Pizlo  <fpizlo@apple.com>
 
         The JSC JIT currently has no facility to profile and report

third_party/WebKit/Source/JavaScriptCore/heap/MachineStackMarker.cpp

@@ -76,7 +76,7 @@
 #include <errno.h>
 #endif
 
-#if USE(PTHREADS) && !OS(WINDOWS) && !OS(DARWIN)
+#if ENABLE(JSC_MULTIPLE_THREADS) && USE(PTHREADS) && !OS(WINDOWS) && !OS(DARWIN)
 #include <signal.h>
 #ifndef SA_RESTART
 #error MachineThreads requires SA_RESTART