1 files changed, 16 insertions, 0 deletions

diff --git a/ac/gnupg-check-typedef.m4 b/ac/gnupg-check-typedef.m4
new file mode 100644
index 0000000..28fd902
--- /dev/null
+++ b/ac/gnupg-check-typedef.m4
@@ -0,0 +1,16 @@
+dnl GNUPG_CHECK_TYPEDEF(TYPE, HAVE_NAME [, COMMENT])
+dnl Check whether a typedef exists and create a #define $2 if it exists
+dnl
+AC_DEFUN([GNUPG_CHECK_TYPEDEF],
+  [ AC_MSG_CHECKING(for $1 typedef)
+    AC_CACHE_VAL(gnupg_cv_typedef_$1,
+    [AC_TRY_COMPILE([#include <stdlib.h>
+    #include <sys/types.h>], [
+    #undef $1
+    int a = sizeof($1);
+    ], gnupg_cv_typedef_$1=yes, gnupg_cv_typedef_$1=no )])
+    AC_MSG_RESULT($gnupg_cv_typedef_$1)
+    if test "$gnupg_cv_typedef_$1" = yes; then
+        AC_DEFINE($2, 1, $3)
+    fi
+  ])