+dnl ---------------------------------------------------------------------------
+dnl WX_CHECK_FUNCS(FUNCTIONS...,
+dnl [ACTION-IF-FOUND],
+dnl [ACTION-IF-NOT-FOUND],
+dnl [EXTRA-DEFINES-AND-INCLUDES],
+dnl [EXTRA-TEST-CODE])
+dnl
+dnl Checks that the functions listed in FUNCTIONS exist in the headers and the
+dnl libs. For each function, if it is found then defines 'HAVE_FUNCTION' and
+dnl executes ACTION-IF-FOUND, otherwise executes ACTION-IF-NOT-FOUND.
+dnl
+dnl The code from EXTRA-DEFINES-AND-INCLUDES is inserted into the test before
+dnl the default headers are included, and EXTRA-TEST-CODE is inserted into
+dnl the main() function after the default test for existence.
+dnl
+dnl Examples:
+dnl # the simple case
+dnl WX_CHECK_FUNCS(stat)
+dnl # use break to finish the loop early
+dnl WX_CHECK_FUNCS(mkstemp mktemp, break)
+dnl # extra defines
+dnl WX_CHECK_FUNCS(strtok_r, [], [], [#define _RREENTRANT])
+dnl # extra includes
+dnl WX_CHECK_FUNCS(swprintf, [], [], [#include <wchar.h>])
+dnl # checking the signature with extra test code
+dnl WX_CHECK_FUNCS(gettimeofday, [], [], [#include <sys/time.h>]
+dnl [struct timeval tv; struct timezone tz; gettimeofday(&tv, &tz)])
+dnl ---------------------------------------------------------------------------
+
+AC_DEFUN([WX_CHECK_FUNCS],
+[
+ for wx_func in $1
+ do
+ AC_CACHE_CHECK(
+ [for $wx_func],
+ [wx_cv_func_$wx_func],
+ [
+ AC_LINK_IFELSE(
+ [
+ AC_LANG_PROGRAM(
+ [
+ $4
+ AC_INCLUDES_DEFAULT
+ ],
+ [
+ #ifndef $wx_func
+ &$wx_func;
+ #endif
+ $5
+ ])
+ ],
+ [eval wx_cv_func_$wx_func=yes],
+ [eval wx_cv_func_$wx_func=no])
+ ])
+
+ if eval test \$wx_cv_func_$wx_func = yes
+ then
+ AC_DEFINE_UNQUOTED([HAVE_`echo $wx_func | tr 'a-z' 'A-Z'`])
+ $2
+ else
+ :
+ $3
+ fi
+ done
+])
+