use atomic operations provided by the compiler if they are available (yay for gcc 4.1 users!)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@33953 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2006-06-13 21:35:29 +00:00
parent fca19e7635
commit eddf363a0e
4 changed files with 94 additions and 4 deletions

View File

@@ -723,6 +723,14 @@ AC_FUNC_UTIME_NULL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([atexit bzero dup2 endpwent floor ftruncate getcwd gethostbyname gethostname gettimeofday inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap pow putenv re_comp regcomp rint select setenv socket sqrt strcasecmp strchr strcspn strdup strerror strncasecmp strndup strnlen strrchr strsep strspn strstr strtol unsetenv utime strtoq strcasestr asprintf vasprintf])
echo -n "checking for compiler atomic operations... "
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM([], [int foo1; int foo2 = __sync_fetch_and_add(&foo1, 1);]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_GCC_ATOMICS], 1, [Define to 1 if your GCC C compiler provides atomic operations.]),
AC_MSG_RESULT(no)
)
AC_CONFIG_FILES([build_tools/menuselect-deps makeopts])
AC_OUTPUT