PHPC-2477: BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES is obsolete

CDRIVER-2694 removed BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES

Author: jmikola

config.w32

@@ -130,7 +130,6 @@ if (PHP_MONGODB != "no") {
     BSON_OS: 2,
     BSON_HAVE_STDBOOL_H: 0,
     BSON_HAVE_STRINGS_H: 0,
-    BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES: 0,
     BSON_HAVE_CLOCK_GETTIME: 0,
     BSON_HAVE_STRNLEN: 0,
     BSON_HAVE_SNPRINTF: 0,

scripts/autotools/libbson/FindDependencies.m4

@@ -96,26 +96,3 @@ AX_PTHREAD([
 ],[
   AC_MSG_ERROR([libbson requires pthreads on non-Windows platforms.])
 ])
-
-
-# The following is borrowed from the guile configure script.
-#
-# On past versions of Solaris, believe 8 through 10 at least, you
-# had to write "pthread_once_t foo = { PTHREAD_ONCE_INIT };".
-# This is contrary to POSIX:
-# http://www.opengroup.org/onlinepubs/000095399/functions/pthread_once.html
-# Check here if this style is required.
-#
-# glibc (2.3.6 at least) works both with or without braces, so the
-# test checks whether it works without.
-#
-AC_SUBST(BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES, 0)
-AC_CACHE_CHECK([whether PTHREAD_ONCE_INIT needs braces],
-  bson_cv_need_braces_on_pthread_once_init,
-  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>
-     pthread_once_t foo = PTHREAD_ONCE_INIT;]])],
-    [bson_cv_need_braces_on_pthread_once_init=no],
-    [bson_cv_need_braces_on_pthread_once_init=yes])])
-if test "$bson_cv_need_braces_on_pthread_once_init" = yes; then
-    AC_SUBST(BSON_PTHREAD_ONCE_INIT_NEEDS_BRACES, 1)
-fi