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dnl
dnl Copyright 2007 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., 51 Franklin Street,
dnl Boston, MA 02110-1301, USA.
dnl
dnl Configure paths for library qwt.
dnl
dnl GR_QWT([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl
dnl Test for library qwt, set QWT_CFLAGS and QWT_LIBS if found. Assumes
dnl QT_CFLAGS and QT_LIBS have already been correctly set.
dnl
AC_DEFUN([GR_QWT],
[
dnl Save the environment
AC_LANG_PUSH(C++)
qwt_save_CPPFLAGS="$CPPFLAGS"
qwt_save_LIBS="$LIBS"
libqwt_ok=yes
dnl Allow user to specify where QWT files are
AC_ARG_WITH([qwt-libdir],
[ --with-qwt-libdir=path Prefix where QWT library is installed (optional)],
[qwt_libdir="$withval"], [qwt_libdir=""])
AC_ARG_WITH([qwt-incdir],
[ --with-qwt-incdir=path Prefix where QWT include files are (optional)],
[qwt_incdir="$withval"], [qwt_incdir=""])
dnl Create QWT_CFLAGS based on user input
AC_MSG_CHECKING(QWT_CFLAGS)
if test "$qwt_incdir" != "" ; then
QWT_CFLAGS="$QWT_CFLAGS -I$qwt_incdir"
fi
AC_MSG_RESULT($QWT_CFLAGS)
dnl Set CPPFLAGS so C++ tests can operate
CPPFLAGS="$CPPFLAGS $QT_CFLAGS $QWT_CFLAGS"
dnl Check for presence of header files
AC_CHECK_HEADERS([qwt.h],
[],
[libqwt_ok=no;AC_MSG_RESULT([cannot find usable qwt headers])]
)
dnl Set QWT_LIBS based on user input
AC_MSG_CHECKING(QWT_LIBS)
QWT_LIBS="$QWT_LIBS -lqwt"
if test "$qwt_libdir" != "" ; then
QWT_LIBS="-L$qwt_libdir $QWT_LIBS"
fi
AC_MSG_RESULT($QWT_LIBS)
dnl Set LIBS so C++ link test can operate
LIBS="$QWT_LIBS $QT_LIBS $LIBS"
dnl Check that library files can be linked in
dnl This references an arbitrary static class method
AC_TRY_LINK([#include <qwt_text.h>],
[QwtTextEngine const *te = QwtText::textEngine(QwtText::AutoText)],
[],
[libqwt_ok=no;AC_MSG_RESULT([unable to link QWT library])]
)
dnl Restore saved variables
LIBS="$qwt_save_LIBS"
CPPFLAGS="$qwt_save_CPPFLAGS"
AC_LANG_POP
dnl Execute user actions
if test "x$libqwt_ok" = "xyes" ; then
ifelse([$1], , :, [$1])
else
QWT_CFLAGS=""
QWT_LIBDIRS=""
ifelse([$2], , :, [$2])
fi
dnl Export our variables
AC_SUBST(QWT_CFLAGS)
AC_SUBST(QWT_LIBS)
])
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