k0kubun	2018-06-23 16:21:12 +0900 (Sat, 23 Jun 2018)

  New Revision: 63730

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63730

  Log:
    mjit.c: initial cygwin support
    
    thread_pthread.c: Drop pthread_attr_setscope usage. It seems that,
    at least on Linux and macOS, PTHREAD_SCOPE_PROCESS is not supported
    and thus PTHREAD_SCOPE_SYSTEM should be used by default.
    
    Let's just stop calling this until we find some platform that needs
    `pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM)`.
    
    [Misc #14854]
    
    From: fd0 (Daisuke Fujimura)

  Modified files:
    trunk/mjit.c
    trunk/thread_pthread.c
Index: mjit.c
===================================================================
--- mjit.c	(revision 63729)
+++ mjit.c	(revision 63730)
@@ -610,7 +610,7 @@ static const char *const CC_DLDFLAGS_ARG https://github.com/ruby/ruby/blob/trunk/mjit.c#L610
     MJIT_DLDFLAGS
 #if defined __GNUC__ && !defined __clang__
     "-nostartfiles",
-# ifndef _WIN32
+# if !defined(_WIN32) && !defined(__CYGWIN__)
     "-nodefaultlibs", "-nostdlib",
 # endif
 #endif
@@ -618,10 +618,12 @@ static const char *const CC_DLDFLAGS_ARG https://github.com/ruby/ruby/blob/trunk/mjit.c#L618
 };
 
 static const char *const CC_LIBS[] = {
-#ifdef _WIN32
+#if defined(_WIN32) || defined(__CYGWIN__)
     MJIT_LIBS
 # if defined __GNUC__ && !defined __clang__
+#  if defined(_WIN32)
     "-lmsvcrt",
+#  endif
     "-lgcc",
 # endif
 #endif
Index: thread_pthread.c
===================================================================
--- thread_pthread.c	(revision 63729)
+++ thread_pthread.c	(revision 63730)
@@ -1757,7 +1757,6 @@ rb_thread_create_mjit_thread(void (*chil https://github.com/ruby/ruby/blob/trunk/thread_pthread.c#L1757
 
     /* jit_worker thread is not to be joined */
     if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) == 0
-        && pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM) == 0
         && pthread_create(&worker_pid, &attr, mjit_worker, (void *)worker_func) == 0) {
         ret = TRUE;
     }

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