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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_lib_tabix.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_TABIX()
#
# DESCRIPTION
#
# This macro searches for an installed tabix library. If nothing was
# specified when calling configure, it searches first in /usr/local and
# then tries with ld's default library search path. If the
# --with-tabix=DIR is specified, it will try to find it in
# DIR/include/tabix/tabix.h and DIR/lib/libtabix.a. As a final try it will
# look in DIR/tabix.h and DIR/libtabix.a as the tabix library does not
# contain an install rule.
#
# If --without-tabix is specified, the library is not searched at all.
#
# If either the header file (tabix.h) or the library (libtabix) is not
# found, the configuration exits on error, asking for a valid tabix
# installation directory or --without-tabix.
#
# The macro defines the symbol HAVE_TABIX if the library is found. You
# should use autoheader to include a definition for this symbol in a
# config.h file. Sample usage in a C/C++ source is as follows:
#
# #ifdef HAVE_TABIX
# #include <tabix.h>
# #endif /* HAVE_TABIX */
#
# The following output variables are set with AC_SUBST:
#
# TABIX_CPPFLAGS
# TABIX_LDFLAGS
# TABIX_LIBS
#
# You can use them like this in Makefile.am:
#
# AM_CPPFLAGS = $(TABIX_CPPFLAGS)
# AM_LDFLAGS = $(TABIX_LDFLAGS)
# program_LDADD = $(TABIX_LIBS)
#
# LICENSE
#
# Copyright (c) 2013 Timothy Brown <tbrown@freeshell.org>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 2
AC_DEFUN([AX_LIB_TABIX],
#
# Handle user hints
#
[AC_MSG_CHECKING([if tabix is wanted])
AC_ARG_WITH([tabix],
AS_HELP_STRING([--with-tabix],
[search for tabix in DIR/include and DIR/lib]),
[if test "$withval" != no ; then
AC_MSG_RESULT([yes])
if test -d "$withval" ; then
TABIX_HOME="$withval"
else
AC_MSG_WARN([Sorry, $withval does not exist, checking usual places])
fi
else
AC_MSG_RESULT([no])
fi],
[AC_MSG_RESULT([yes])])
if test -f "${TABIX_HOME}/include/tabix/tabix.h" ; then
TABIX_INCDIR="-I${TABIX_HOME}/include/tabix"
TABIX_LIBDIR="-L${TABIX_HOME}/lib"
elif test -f "${TABIX_HOME}/include/tabix.h" ; then
TABIX_INCDIR="-I${TABIX_HOME}/include"
TABIX_LIBDIR="-L${TABIX_HOME}/lib"
elif test -f "${TABIX_HOME}/tabix.h" ; then
TABIX_INCDIR="-I${TABIX_HOME}"
TABIX_LIBDIR="-L${TABIX_HOME}"
elif test -f "/usr/local/include/tabix/tabix.h" ; then
TABIX_HOME="/usr/local"
TABIX_INCDIR="-I${TABIX_HOME}/include/tabix"
TABIX_LIBDIR="-L${TABIX_HOME}/lib"
else
TABIX_HOME="/usr"
TABIX_INCDIR="-I${TABIX_HOME}/include/tabix"
TABIX_LIBDIR=""
fi
#
# Locate tabix, if wanted
#
if test -n "${TABIX_HOME}" ; then
TABIX_OLD_LDFLAGS=$LDFLAGS
TABIX_OLD_CPPFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS ${TABIX_LIBDIR}"
CPPFLAGS="$CPPFLAGS ${TABIX_INCDIR}"
AC_LANG_SAVE
AC_LANG_C
AC_CHECK_HEADER([tabix.h], [ac_cv_tabix_h=yes], [ac_cv_tabix_h=no])
AC_CHECK_LIB([tabix],[ti_open],[ac_cv_libtabix=yes],[ac_cv_libtabix=no])
AC_LANG_RESTORE
if test "$ac_cv_libtabix" = "yes" && \
test "$ac_cv_tabix_h" = "yes" ; then
#
# If both library and header were found, use them
#
AC_MSG_CHECKING([tabix])
AC_MSG_RESULT([ok])
with_tabix=yes
else
#
# If either header or library was not found, revert and bomb
#
LDFLAGS="$TABIX_OLD_LDFLAGS"
CPPFLAGS="$TABIX_OLD_CPPFLAGS"
AC_MSG_CHECKING([tabix])
AC_MSG_RESULT([failed])
AC_MSG_ERROR([either specify a valid tabix installation with --with-tabix=DIR or disable tabix usage with --without-tabix])
fi
fi
])
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