AC_CHECK_SIZEOF_SYSTYPE (forgot to add acinclude.m4 previously)

diff --git a/acinclude.m4 b/acinclude.m4
new file mode 100644 (file)
index 0000000..6f599c2
--- /dev/null
+++ b/acinclude.m4
@@ -0,0 +1,34 @@
+dnl AC_CHECK_SIZEOF_SYSTYPE is as the standard AC_CHECK_SIZEOF macro
+dnl but also capable of checking the size of system defined types, not
+dnl only compiler defined types.
+
+dnl AC_CHECK_SIZEOF_SYSTYPE(TYPE [, CROSS-SIZE])
+AC_DEFUN(AC_CHECK_SIZEOF_SYSTYPE,
+[changequote(<<, >>)dnl
+dnl The name to #define.
+define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
+dnl The cache variable name.
+define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
+changequote([, ])dnl
+AC_MSG_CHECKING(size of $1)
+AC_CACHE_VAL(AC_CV_NAME,
+[AC_TRY_RUN([#include <stdio.h>
+#if HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+int main()
+{
+  FILE *f=fopen("conftestval", "w");
+  if (!f) return(1);
+  fprintf(f, "%d\n", sizeof($1));
+  return(0);
+}], AC_CV_NAME=`cat conftestval`, AC_CV_NAME=0, ifelse([$2], , , AC_CV_NAME=$2))])dnl
+AC_MSG_RESULT($AC_CV_NAME)
+AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
+undefine([AC_TYPE_NAME])dnl
+undefine([AC_CV_NAME])dnl
+])
+