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curl-functions.m4: update detection logic of getaddrinfo() thread-safeness

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Take in account that POSIX standard Issue 7 drops h_errno support. Now, we also
consider getaddrinfo() to be thread-safe when (_POSIX_C_SOURCE >= 200809L) or
(_XOPEN_SOURCE >= 700) independently of whether h_errno exists or not.
This commit is contained in:
Yang Tse 2012-03-21 01:02:58 +01:00
parent c6825b7a6b
commit dddcd3b042
1 changed files with 18 additions and 2 deletions
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20
m4/curl-functions.m4
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@ -5,7 +5,7 @@
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
# Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
@ -21,7 +21,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 68
# serial 69
dnl CURL_INCLUDES_ARPA_INET
@ -2196,6 +2196,22 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
tst_tsafe_getaddrinfo="yes"
;;
esac
if test "$tst_tsafe_getaddrinfo" = "unknown"; then
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L)
return 0;
#elif defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 700)
return 0;
#else
force compilation error
#endif
]])
],[
tst_tsafe_getaddrinfo="yes"
])
fi
if test "$tst_tsafe_getaddrinfo" = "unknown"; then
CURL_CHECK_DEF_CC([h_errno], [
$curl_includes_ws2tcpip