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

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Take in account that h_errno might be a modifiable lvalue not defined as
a C preprocessor macro
This commit is contained in:
Yang Tse 2012-03-28 18:46:08 +02:00
parent 0580b60622
commit 809c809281
1 changed files with 37 additions and 13 deletions
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50
m4/curl-functions.m4
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@ -21,7 +21,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 69
# serial 70
dnl CURL_INCLUDES_ARPA_INET
@ -2020,6 +2020,7 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
AC_REQUIRE([CURL_INCLUDES_STRING])dnl
AC_REQUIRE([CURL_INCLUDES_SYS_SOCKET])dnl
AC_REQUIRE([CURL_INCLUDES_NETDB])dnl
AC_REQUIRE([CURL_CHECK_NATIVE_WINDOWS])dnl
#
tst_links_getaddrinfo="unknown"
tst_proto_getaddrinfo="unknown"
@ -2196,7 +2197,34 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
tst_tsafe_getaddrinfo="yes"
;;
esac
if test "$tst_tsafe_getaddrinfo" = "unknown" &&
test "$ac_cv_native_windows" = "yes"; then
tst_tsafe_getaddrinfo="yes"
fi
if test "$tst_tsafe_getaddrinfo" = "unknown"; then
CURL_CHECK_DEF_CC([h_errno], [
$curl_includes_sys_socket
$curl_includes_netdb
], [silent])
if test "$curl_cv_have_def_h_errno" = "yes"; then
tst_h_errno_macro="yes"
else
tst_h_errno_macro="no"
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_sys_socket
$curl_includes_netdb
]],[[
h_errno = 2;
if(0 != h_errno)
return 1;
]])
],[
tst_h_errno_modifiable_lvalue="yes"
],[
tst_h_errno_modifiable_lvalue="no"
])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
@ -2209,22 +2237,18 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
#endif
]])
],[
tst_tsafe_getaddrinfo="yes"
tst_h_errno_sbs_issue_7="yes"
],[
tst_h_errno_sbs_issue_7="no"
])
fi
if test "$tst_tsafe_getaddrinfo" = "unknown"; then
CURL_CHECK_DEF_CC([h_errno], [
$curl_includes_ws2tcpip
$curl_includes_sys_socket
$curl_includes_netdb
], [silent])
if test "$curl_cv_have_def_h_errno" = "no"; then
if test "$tst_h_errno_macro" = "no" &&
test "$tst_h_errno_modifiable_lvalue" = "no" &&
test "$tst_h_errno_sbs_issue_7" = "no"; then
tst_tsafe_getaddrinfo="no"
else
tst_tsafe_getaddrinfo="yes"
fi
fi
if test "$tst_tsafe_getaddrinfo" = "unknown"; then
tst_tsafe_getaddrinfo="yes"
fi
AC_MSG_RESULT([$tst_tsafe_getaddrinfo])
if test "$tst_tsafe_getaddrinfo" = "yes"; then
AC_DEFINE_UNQUOTED(HAVE_GETADDRINFO_THREADSAFE, 1,