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-rw-r--r--tool/m4/ruby_thread.m480
1 files changed, 80 insertions, 0 deletions
diff --git a/tool/m4/ruby_thread.m4 b/tool/m4/ruby_thread.m4
new file mode 100644
index 0000000000..439c63bc22
--- /dev/null
+++ b/tool/m4/ruby_thread.m4
@@ -0,0 +1,80 @@
+dnl -*- Autoconf -*-
+AC_DEFUN([RUBY_THREAD], [
+AC_ARG_WITH(thread,
+ AS_HELP_STRING([--with-thread=IMPLEMENTATION], [specify the thread implementation to use]),
+ [THREAD_MODEL=$withval], [
+ THREAD_MODEL=
+ AS_CASE(["$target_os"],
+ [freebsd*], [
+ AC_CACHE_CHECK([whether pthread should be enabled by default],
+ rb_cv_enable_pthread_default,
+ [AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
+@%:@include <osreldate.h>
+@%:@if __FreeBSD_version < 502102
+@%:@error pthread should be disabled on this platform
+@%:@endif
+ ]])],
+ rb_cv_enable_pthread_default=yes,
+ rb_cv_enable_pthread_default=no)])
+ AS_IF([test $rb_cv_enable_pthread_default = yes],
+ [THREAD_MODEL=pthread],
+ [THREAD_MODEL=none])
+ ],
+ [mingw*], [
+ THREAD_MODEL=win32
+ ],
+ [wasi*], [
+ THREAD_MODEL=none
+ ],
+ [
+ THREAD_MODEL=pthread
+ ]
+ )
+])
+
+AS_IF([test x"$THREAD_MODEL" = xpthread], [
+ AC_CHECK_HEADERS(pthread.h)
+ AS_IF([test x"$ac_cv_header_pthread_h" = xyes], [], [
+ AC_MSG_WARN("Don't know how to find pthread header on your system -- thread support disabled")
+ THREAD_MODEL=none
+ ])
+])
+AS_IF([test x"$THREAD_MODEL" = xpthread], [
+ THREAD_MODEL=none
+ for pthread_lib in thr pthread pthreads c c_r root; do
+ AC_CHECK_LIB($pthread_lib, pthread_create,
+ [THREAD_MODEL=pthread; break])
+ done
+ AS_IF([test x"$THREAD_MODEL" = xpthread], [
+ AC_DEFINE(_REENTRANT)
+ AC_DEFINE(_THREAD_SAFE)
+ AC_DEFINE(HAVE_LIBPTHREAD)
+ AC_CHECK_HEADERS(pthread_np.h, [], [], [@%:@include <pthread.h>])
+ AS_CASE(["$pthread_lib:$target_os"],
+ [c:*], [],
+ [root:*], [],
+ [c_r:*|*:openbsd*|*:mirbsd*], [LIBS="-pthread $LIBS"],
+ [LIBS="-l$pthread_lib $LIBS"])
+ ], [
+ AC_MSG_WARN("Don't know how to find pthread library on your system -- thread support disabled")
+ ])
+])
+
+AS_CASE(["$THREAD_MODEL"],
+[pthread], [],
+[win32], [],
+[none], [],
+[""], [AC_MSG_ERROR(thread model is missing)],
+ [AC_MSG_ERROR(unknown thread model $THREAD_MODEL)])
+AC_MSG_CHECKING(thread model)
+AC_MSG_RESULT($THREAD_MODEL)
+
+THREAD_IMPL_H=thread_$THREAD_MODEL.h
+AS_IF([test ! -f "$srcdir/$THREAD_IMPL_H"],
+ [AC_MSG_ERROR('$srcdir/$THREAD_IMPL_H' must exist)])
+THREAD_IMPL_SRC=thread_$THREAD_MODEL.c
+AS_IF([test ! -f "$srcdir/$THREAD_IMPL_SRC"],
+ [AC_MSG_ERROR('$srcdir/$THREAD_IMPL_SRC' must exist)])
+AC_DEFINE_UNQUOTED(THREAD_IMPL_H, ["$THREAD_IMPL_H"])
+AC_DEFINE_UNQUOTED(THREAD_IMPL_SRC, ["$THREAD_IMPL_SRC"])
+])dnl