From 5f268f77600250a97d3a3dc1e7d9e8a51f81f875 Mon Sep 17 00:00:00 2001
From: Brian Gaeke <gaeke@uiuc.edu>
Date: Fri, 5 Dec 2003 19:29:01 +0000
Subject: [PATCH] Add check for pthread_mutex_lock() in -lpthread (or
 otherwise). Regenerated configure w/ autoconf-2.57.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10293 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/configure.ac |   4 ++
 configure             | 111 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 115 insertions(+)

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 27047478551..d1df826dd78 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -294,6 +294,10 @@ AC_SEARCH_LIBS(dlopen,dl,AC_DEFINE([HAVE_DLOPEN],[1],[Define if dlopen() is avai
 dnl mallinfo is optional; the code can compile (minus features) without it
 AC_SEARCH_LIBS(mallinfo,malloc,AC_DEFINE([HAVE_MALLINFO],[1],[Define if mallinfo() is available on this platform.]))
 
+dnl pthread locking functions are optional - but llvm will not be thread-safe
+dnl without locks.
+AC_SEARCH_LIBS(pthread_mutex_lock,pthread,AC_DEFINE(HAVE_PTHREAD_MUTEX_LOCK,1,[Define if PThread mutexes (e.g., pthread_mutex_lock) are available in the system's thread library.]))
+
 dnl
 dnl The math libraries are used by the test code, but not by the actual LLVM
 dnl code.
diff --git a/configure b/configure
index 142178948b0..b23313d1dbb 100755
--- a/configure
+++ b/configure
@@ -18956,6 +18956,117 @@ _ACEOF
 fi
 
 
+echo "$as_me:$LINENO: checking for library containing pthread_mutex_lock" >&5
+echo $ECHO_N "checking for library containing pthread_mutex_lock... $ECHO_C" >&6
+if test "${ac_cv_search_pthread_mutex_lock+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+ac_cv_search_pthread_mutex_lock=no
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char pthread_mutex_lock ();
+int
+main ()
+{
+pthread_mutex_lock ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_search_pthread_mutex_lock="none required"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+if test "$ac_cv_search_pthread_mutex_lock" = no; then
+  for ac_lib in pthread; do
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+    cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char pthread_mutex_lock ();
+int
+main ()
+{
+pthread_mutex_lock ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_search_pthread_mutex_lock="-l$ac_lib"
+break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+  done
+fi
+LIBS=$ac_func_search_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_search_pthread_mutex_lock" >&5
+echo "${ECHO_T}$ac_cv_search_pthread_mutex_lock" >&6
+if test "$ac_cv_search_pthread_mutex_lock" != no; then
+  test "$ac_cv_search_pthread_mutex_lock" = "none required" || LIBS="$ac_cv_search_pthread_mutex_lock $LIBS"
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_PTHREAD_MUTEX_LOCK 1
+_ACEOF
+
+fi
+
+
 
 echo "$as_me:$LINENO: checking for ANSI C header files" >&5
 echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
-- 
2.34.1