Check for libieee1284

Will be needed by the Hung-Chang DSO-2100 driver.

diff --git a/configure.ac b/configure.ac
index b4a4332eae15f01932c649a693a790af3f3f490b..aa5cdad554acff0437e98997b2741208bf5a5375 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -128,6 +128,25 @@ AS_CASE([$host], [*-mingw*], [SR_EXTRA_LIBS='-lws2_32'], [SR_EXTRA_LIBS=])
 # libm (the standard math library) is always needed.
 SR_SEARCH_LIBS([SR_EXTRA_LIBS], [pow], [m])
 
+AC_ARG_WITH([libieee1284], [AS_HELP_STRING([--without-libieee1284],
+                               [disable libieee1284 support [default=detect]])])
+sr_have_libieee1284=no
+AS_IF([test "x$with_libieee1284" != xno], [
+       AC_CHECK_HEADER([ieee1284.h], [
+               SR_SEARCH_LIBS([SR_EXTRA_LIBS], [ieee1284_open], [ieee1284], [
+                       sr_have_libieee1284=yes
+                       SR_APPEND([sr_deps_avail], [libieee1284])
+                       sr_pkg_check_summary_append "libieee1284" yes
+               ])
+       ])
+       AS_IF([test "$sr_have_libieee1284" = no], [
+               AS_IF([test "x$with_libieee1284" = xyes], [
+                       AC_MSG_ERROR([libieee1284 support requested, but it was not found.])
+               ])
+               sr_pkg_check_summary_append "libieee1284" no
+       ])
+])
+
 # RPC is only needed for VXI support.
 AC_CACHE_CHECK([for RPC support], [sr_cv_have_rpc],
        [AC_LINK_IFELSE([AC_LANG_PROGRAM(