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-rw-r--r--m4/check_define.m413
1 files changed, 13 insertions, 0 deletions
diff --git a/m4/check_define.m4 b/m4/check_define.m4
new file mode 100644
index 00000000..43edc78e
--- /dev/null
+++ b/m4/check_define.m4
@@ -0,0 +1,13 @@
+AC_DEFUN([AC_CHECK_DEFINE],[
+AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1_$2])dnl
+AC_CACHE_CHECK([for $1 in $2], ac_var,
+AC_TRY_COMPILE([#include <$2>],[
+ #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"], [$3], [$4])dnl
+AS_VAR_POPDEF([ac_var])dnl
+])