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+dnl Copyright 2010 The Kyua Authors.
+dnl All rights reserved.
+dnl
+dnl Redistribution and use in source and binary forms, with or without
+dnl modification, are permitted provided that the following conditions are
+dnl met:
+dnl
+dnl * Redistributions of source code must retain the above copyright
+dnl notice, this list of conditions and the following disclaimer.
+dnl * Redistributions in binary form must reproduce the above copyright
+dnl notice, this list of conditions and the following disclaimer in the
+dnl documentation and/or other materials provided with the distribution.
+dnl * Neither the name of Google Inc. nor the names of its contributors
+dnl may be used to endorse or promote products derived from this software
+dnl without specific prior written permission.
+dnl
+dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+dnl "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+dnl LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+dnl A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+dnl OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+dnl SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+dnl LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+dnl DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+dnl THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+dnl OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+dnl
+dnl KYUA_DOXYGEN
+dnl
+dnl Adds a --with-doxygen flag to the configure script and, when Doxygen support
+dnl is requested by the user, sets DOXYGEN to the path of the Doxygen binary and
+dnl enables the WITH_DOXYGEN Automake conditional.
+dnl
+AC_DEFUN([KYUA_DOXYGEN], [
+ AC_ARG_WITH([doxygen],
+ AS_HELP_STRING([--with-doxygen],
+ [build documentation for internal APIs]),
+ [],
+ [with_doxygen=auto])
+
+ if test "${with_doxygen}" = yes; then
+ AC_PATH_PROG([DOXYGEN], [doxygen], [])
+ if test -z "${DOXYGEN}"; then
+ AC_MSG_ERROR([Doxygen explicitly requested but not found])
+ fi
+ elif test "${with_doxygen}" = auto; then
+ AC_PATH_PROG([DOXYGEN], [doxygen], [])
+ elif test "${with_doxygen}" = no; then
+ DOXYGEN=
+ else
+ AC_MSG_CHECKING([for doxygen])
+ DOXYGEN="${with_doxygen}"
+ AC_MSG_RESULT([${DOXYGEN}])
+ if test ! -x "${DOXYGEN}"; then
+ AC_MSG_ERROR([Doxygen binary ${DOXYGEN} is not executable])
+ fi
+ fi
+ AM_CONDITIONAL([WITH_DOXYGEN], [test -n "${DOXYGEN}"])
+ AC_SUBST([DOXYGEN])
+])