From 27fcfe1364943dadd99fd0ef5af6793f58acc446 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Thu, 25 Jun 2009 23:10:26 +0000
Subject: [PATCH] Add a configure test for pthread_getspecific, and use it when
 building ThreadLocal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74222 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/configure.ac           |   3 +
 configure                       | 103 ++++++++++++++++++++++++++++++++
 include/llvm/Config/config.h.in |   3 +
 lib/System/ThreadLocal.cpp      |   2 +-
 4 files changed, 110 insertions(+), 1 deletion(-)

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 0abe2347957..f71e648d571 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -829,6 +829,9 @@ if test "$ENABLE_THREADS" -eq 1 ; then
   AC_SEARCH_LIBS(pthread_rwlock_init,pthread,
                  AC_DEFINE([HAVE_PTHREAD_RWLOCK_INIT],[1],
                  [Have pthread_rwlock_init]))
+  AC_SEARCH_LIBS(pthread_getspecific,pthread,
+                 AC_DEFINE([HAVE_PTHREAD_GETSPECIFIC],[1],
+                 [Have pthread_getspecific]))
 fi
 
 dnl Allow extra x86-disassembler library
diff --git a/configure b/configure
index 4d0d90f5ef3..a237d673ec0 100755
--- a/configure
+++ b/configure
@@ -28032,6 +28032,109 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_PTHREAD_RWLOCK_INIT 1
 _ACEOF
 
+fi
+
+  { echo "$as_me:$LINENO: checking for library containing pthread_getspecific" >&5
+echo $ECHO_N "checking for library containing pthread_getspecific... $ECHO_C" >&6; }
+if test "${ac_cv_search_pthread_getspecific+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char pthread_getspecific ();
+int
+main ()
+{
+return pthread_getspecific ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' pthread; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_search_pthread_getspecific=$ac_res
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+
+fi
+
+rm -f core conftest.err conftest.$ac_objext \
+      conftest$ac_exeext
+  if test "${ac_cv_search_pthread_getspecific+set}" = set; then
+  break
+fi
+done
+if test "${ac_cv_search_pthread_getspecific+set}" = set; then
+  :
+else
+  ac_cv_search_pthread_getspecific=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_search_pthread_getspecific" >&5
+echo "${ECHO_T}$ac_cv_search_pthread_getspecific" >&6; }
+ac_res=$ac_cv_search_pthread_getspecific
+if test "$ac_res" != no; then
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_PTHREAD_GETSPECIFIC 1
+_ACEOF
+
 fi
 
 fi
diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in
index ac60f4dc3a5..9452ce7c0d4 100644
--- a/include/llvm/Config/config.h.in
+++ b/include/llvm/Config/config.h.in
@@ -279,6 +279,9 @@
 /* Define to have the %a format string */
 #undef HAVE_PRINTF_A
 
+/* Have pthread_getspecific */
+#undef HAVE_PTHREAD_GETSPECIFIC
+
 /* Define to 1 if you have the <pthread.h> header file. */
 #undef HAVE_PTHREAD_H
 
diff --git a/lib/System/ThreadLocal.cpp b/lib/System/ThreadLocal.cpp
index 1c070366709..8d119fbf241 100644
--- a/lib/System/ThreadLocal.cpp
+++ b/lib/System/ThreadLocal.cpp
@@ -30,7 +30,7 @@ void* ThreadLocalImpl::getInstance() { return data; }
 }
 #else
 
-#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
+#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC)
 
 #include <cassert>
 #include <pthread.h>