+dnl 2006 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GNU Radio
+dnl
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 2, or (at your option)
+dnl any later version.
+dnl
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING. If not, write to
+dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+dnl Boston, MA 02111-1307, USA.
+
+# Create --enable-foo argument for named component, create variables as needed
+# $1 is component name
+AC_DEFUN([GRC_ENABLE],[
+ AC_ARG_ENABLE([$1],[ --enable-$1 Fail build if $1 fails configuration],[],
+ [[enable_]m4_bpatsubst($1,-,_)=$enable_all_components])
+])
+
+# Conditionally build named component.
+# $1 is component name
+# $2 is executed if configuration passes and build is desired
+# Use $passed=no to indicate configuration failure
+# Any other value of $passed, including blank, assumes success
+AC_DEFUN([GRC_BUILD_CONDITIONAL],[
+ if test x$passed = xno; then
+ skipped_dirs="$skipped_dirs $1"
+ if test x$[enable_]m4_bpatsubst($1,-,_) = xyes; then
+ AC_MSG_ERROR([Component $1 has errors, stopping.])
+ else
+ AC_MSG_RESULT([Not building component $1.])
+ fi
+ else
+ if test x$[enable_]m4_bpatsubst($1,-,_) != xno; then
+ $2
+ build_dirs="$build_dirs $1"
+ AC_MSG_RESULT([Component $1 passed configuration checks, building.])
+ else
+ skipped_dirs="$skipped_dirs $1"
+ AC_MSG_RESULT([Component $1 passed configuration checks, but not building.])
+ fi
+ fi
+])