1 files changed, 42 insertions, 0 deletions
diff --git a/m4/ac_check_define.m4 b/m4/ac_check_define.m4
new file mode 100644
index 0000000..3ed922c
--- /dev/null
+++ b/m4/ac_check_define.m4
@@ -0,0 +1,42 @@
+AC_DEFUN([AC_CHECK_DEFINED],[
+AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl
+AC_CACHE_CHECK([for $1 defined], ac_var,
+AC_TRY_COMPILE(,[
+  #ifdef $1
+  int ok;
+  #else
+  choke me
+  #endif
+],AS_VAR_SET(ac_var, yes),AS_VAR_SET(ac_var, no)))
+AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl
+AS_VAR_POPDEF([ac_var])dnl
+])
+
+AC_DEFUN([AX_CHECK_DEFINED],[
+AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2])dnl
+AC_CACHE_CHECK([for $2 defined], ac_var,
+AC_TRY_COMPILE($1,[
+  #ifdef $2
+  int ok;
+  #else
+  choke me
+  #endif
+],AS_VAR_SET(ac_var, yes),AS_VAR_SET(ac_var, no)))
+AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl
+AS_VAR_POPDEF([ac_var])dnl
+])
+
+AC_DEFUN([AX_CHECK_FUNC],
+[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl
+AC_CACHE_CHECK([for $2], ac_var,
+dnl AC_LANG_FUNC_LINK_TRY
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([$1
+                #undef $2
+                char $2 ();],[
+                char (*f) () = $2;
+                return f != $2; ])],
+                [AS_VAR_SET(ac_var, yes)],
+                [AS_VAR_SET(ac_var, no)])])
+AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl
+AS_VAR_POPDEF([ac_var])dnl
+])# AC_CHECK_FUNC