check for line printer

svn path=/trunk/externals/zexy/; revision=15372

1 files changed, 39 insertions, 0 deletions

diff --git a/m4/iem_parallelport.m4 b/m4/iem_parallelport.m4
new file mode 100644
index 0000000..10c9e44
--- /dev/null
+++ b/m4/iem_parallelport.m4
@@ -0,0 +1,39 @@
+dnl Copyright (C) 2005-2006 IOhannes m zmölnig
+dnl This file is free software; IOhannes m zmölnig
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([IEM_CHECK_LPT],
+[
+dnl check for LPT
+AC_ARG_ENABLE(lpt,    [  --enable-lpt            enable parallelport-support])
+
+if test "x" = "x${enable_lpt}" ; then
+ enable_lpt="${with_lpt}"
+fi
+
+AC_CHECK_HEADERS(linux/ppdev.h, [ have_ppdev=" (with device-support)" ], [ have_ppdev="" ])
+
+if test x"$enable_lpt" != "xno"
+then
+  AC_MSG_CHECKING("parallel-port")
+  if test "x$enable_lpt" = "xyes"
+  then
+# forced
+    AC_DEFINE([Z_WANT_LPT], [1], [Define if you want parallelport support])
+    have_lpt="yes (forced)"
+  else
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/io.h>]], [[ ioperm(0x3bc, 8, 1); outb(0, 0x3bc); ioperm(0x3bc, 8, 0); ]])],
+                    [have_lpt="yes"], [have_lpt="no"])
+  fi
+fi
+
+if test "x$have_lpt" != "xno"; then
+ AC_DEFINE([Z_WANT_LPT], [1], [Define if you want line printer support])
+ AC_MSG_RESULT([$have_lpt$have_ppdev])
+else
+ AC_MSG_RESULT([no])
+fi
+AM_CONDITIONAL([LPT], [test "x${enable_lpt}" == "xyes"])
+
+]) dnl IEM_CHECK_LPT