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authorYang Tse <yangsita@gmail.com>2009-04-28 16:47:33 +0000
committerYang Tse <yangsita@gmail.com>2009-04-28 16:47:33 +0000
commit5fc305a0bad1ca0685a0c434ad74129147c28d30 (patch)
tree4c99dc2e1ac808912faf3c8587b9410be5cfbb51 /acinclude.m4
parent488a855a4adbebe363c7ca0537c8c2de2bda28ea (diff)
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Initial step towards a configure time ares_socklen_t definition
Diffstat (limited to 'acinclude.m4')
-rw-r--r--acinclude.m4162
1 files changed, 162 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4
index 790d1c7..8cadce1 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1737,6 +1737,168 @@ AC_DEFUN([CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC], [
])
+dnl CARES_DEFINE_UNQUOTED (VARIABLE, [VALUE])
+dnl -------------------------------------------------
+dnl Like AC_DEFINE_UNQUOTED this macro will define a C preprocessor
+dnl symbol that can be further used in custom template configuration
+dnl files. This macro, unlike AC_DEFINE_UNQUOTED, does not use a third
+dnl argument for the description. Symbol definitions done with this
+dnl macro are intended to be exclusively used in handcrafted *.h.in
+dnl template files. Contrary to what AC_DEFINE_UNQUOTED does, this one
+dnl prevents autoheader generation and insertion of symbol template
+dnl stub and definition into the first configuration header file. Do
+dnl not use this macro as a replacement for AC_DEFINE_UNQUOTED, each
+dnl one serves different functional needs.
+
+AC_DEFUN([CARES_DEFINE_UNQUOTED], [
+cat >>confdefs.h <<_EOF
+[@%:@define] $1 ifelse($#, 2, [$2], 1)
+_EOF
+])
+
+
+dnl CARES_CONFIGURE_LONG
+dnl -------------------------------------------------
+dnl Find out the size of long as reported by sizeof() and define
+dnl CARES_SIZEOF_LONG as appropriate to be used in template file
+dnl ares_build.h.in to properly configure the library.
+dnl The size of long is a build time characteristic and as such
+dnl must be recorded in ares_build.h
+
+AC_DEFUN([CARES_CONFIGURE_LONG], [
+ if test -z "$ac_cv_sizeof_long" ||
+ test "$ac_cv_sizeof_long" -eq "0"; then
+ AC_MSG_ERROR([cannot find out size of long.])
+ fi
+ CARES_DEFINE_UNQUOTED([CARES_SIZEOF_LONG], [$ac_cv_sizeof_long])
+])
+
+
+dnl CARES_CONFIGURE_ARES_SOCKLEN_T
+dnl -------------------------------------------------
+dnl Find out suitable ares_socklen_t data type definition and size, making
+dnl appropriate definitions for template file ares_build.h.in
+dnl to properly configure and use the library.
+dnl
+dnl The need for the ares_socklen_t definition arises mainly to properly
+dnl interface HP-UX systems which on one hand have a typedef'ed socklen_t
+dnl data type which is 32 or 64-Bit wide depending on the data model being
+dnl used, and that on the other hand is only actually used when interfacing
+dnl the X/Open sockets provided in the xnet library.
+
+AC_DEFUN([CARES_CONFIGURE_ARES_SOCKLEN_T], [
+ AC_REQUIRE([CARES_INCLUDES_WS2TCPIP])dnl
+ AC_REQUIRE([CARES_INCLUDES_SYS_SOCKET])dnl
+ AC_REQUIRE([CARES_PREPROCESS_CALLCONV])dnl
+ #
+ AC_MSG_CHECKING([for ares_socklen_t data type])
+ cares_typeof_ares_socklen_t="unknown"
+ for arg1 in int SOCKET; do
+ for arg2 in 'struct sockaddr' void; do
+ for t in socklen_t int size_t 'unsigned int' long 'unsigned long' void; do
+ if test "$cares_typeof_ares_socklen_t" = "unknown"; then
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ $cares_includes_ws2tcpip
+ $cares_includes_sys_socket
+ $cares_preprocess_callconv
+ extern int FUNCALLCONV getpeername($arg1, $arg2 *, $t *);
+ ]],[[
+ $t *lenptr = 0;
+ if(0 != getpeername(0, 0, lenptr))
+ return 1;
+ ]])
+ ],[
+ cares_typeof_ares_socklen_t="$t"
+ ])
+ fi
+ done
+ done
+ done
+ for t in socklen_t int; do
+ if test "$cares_typeof_ares_socklen_t" = "void"; then
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ $cares_includes_sys_socket
+ typedef $t ares_socklen_t;
+ ]],[[
+ ares_socklen_t dummy;
+ ]])
+ ],[
+ cares_typeof_ares_socklen_t="$t"
+ ])
+ fi
+ done
+ AC_MSG_RESULT([$cares_typeof_ares_socklen_t])
+ if test "$cares_typeof_ares_socklen_t" = "void" ||
+ test "$cares_typeof_ares_socklen_t" = "unknown"; then
+ AC_MSG_ERROR([cannot find data type for ares_socklen_t.])
+ fi
+ #
+ AC_MSG_CHECKING([size of ares_socklen_t])
+ cares_sizeof_ares_socklen_t="unknown"
+ cares_pull_headers_socklen_t="unknown"
+ if test "$ac_cv_header_ws2tcpip_h" = "yes"; then
+ tst_pull_header_checks='none ws2tcpip'
+ tst_size_checks='4'
+ else
+ tst_pull_header_checks='none systypes syssocket'
+ tst_size_checks='4 8 2'
+ fi
+ for tst_size in $tst_size_checks; do
+ for tst_pull_headers in $tst_pull_header_checks; do
+ if test "$cares_sizeof_ares_socklen_t" = "unknown"; then
+ case $tst_pull_headers in
+ ws2tcpip)
+ tmp_includes="$cares_includes_ws2tcpip"
+ ;;
+ systypes)
+ tmp_includes="$cares_includes_sys_types"
+ ;;
+ syssocket)
+ tmp_includes="$cares_includes_sys_socket"
+ ;;
+ *)
+ tmp_includes=""
+ ;;
+ esac
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([[
+ $tmp_includes
+ typedef $cares_typeof_ares_socklen_t ares_socklen_t;
+ typedef char dummy_arr[sizeof(ares_socklen_t) == $tst_size ? 1 : -1];
+ ]],[[
+ ares_socklen_t dummy;
+ ]])
+ ],[
+ cares_sizeof_ares_socklen_t="$tst_size"
+ cares_pull_headers_socklen_t="$tst_pull_headers"
+ ])
+ fi
+ done
+ done
+ AC_MSG_RESULT([$cares_sizeof_ares_socklen_t])
+ if test "$cares_sizeof_ares_socklen_t" = "unknown"; then
+ AC_MSG_ERROR([cannot find out size of ares_socklen_t.])
+ fi
+ #
+ case $cares_pull_headers_socklen_t in
+ ws2tcpip)
+ CARES_DEFINE_UNQUOTED([CARES_PULL_WS2TCPIP_H])
+ ;;
+ systypes)
+ CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_TYPES_H])
+ ;;
+ syssocket)
+ CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_TYPES_H])
+ CARES_DEFINE_UNQUOTED([CARES_PULL_SYS_SOCKET_H])
+ ;;
+ esac
+ CARES_DEFINE_UNQUOTED([CARES_TYPEOF_ARES_SOCKLEN_T], [$cares_typeof_ares_socklen_t])
+ CARES_DEFINE_UNQUOTED([CARES_SIZEOF_ARES_SOCKLEN_T], [$cares_sizeof_ares_socklen_t])
+])
+
+
dnl This macro determines if the specified struct exists in the specified file
dnl Syntax:
dnl CARES_CHECK_STRUCT(headers, struct name, if found, [if not found])