## Process this file with autoconf to produce a configure script.
##
## $Id$

# Copyright (C) 2003 Daniel Dalevi, Jari Häkkinen
# Copyright (C) 2004 Jari Häkkinen
# Copyright (C) 2005, 2006 Jari Häkkinen, Peter Johansson
# Copyright (C) 2007, 2008 Jari Häkkinen, Peter Johansson, Markus Ringnér
# Copyright (C) 2009 Jari Häkkinen, Peter Johansson
# Copyright (C) 2010, 2011 Peter Johansson
# Copyright (C) 2012 Jari Häkkinen, Peter Johansson
# Copyright (C) 2013 Peter Johansson
# Copyright (C) 2014 Jari Häkkinen, Peter Johansson
#
# This file is part of the yat library, http://dev.thep.lu.se/yat
#
# The yat library 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.
#
# The yat library 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 yat. If not, see <http://www.gnu.org/licenses/>.
#
# If you grabbed the source from the subversion repository you should,
# at top-level, execute:
#			./bootstrap
# To push subsequent changes of this file into the build scripts you
# must issue:
#			autoreconf


m4_include([m4/version.m4])
AC_INIT([yat],[my_VERSION],[libyat-users@lists.sourceforge.net],,
        [http://dev.thep.lu.se/yat])
MY_VERSION
AC_PREREQ(2.63)
AC_CONFIG_SRCDIR([yat/utility/Matrix.h])
AC_CONFIG_AUX_DIR([autotools])
dnl arg below should be the same as in Makefile.am
AC_CONFIG_MACRO_DIR([m4])
AC_PREFIX_DEFAULT([/usr/local])

# Set default htmldir to ${docdir}/html
AS_IF([test $htmldir = '${docdir}'], [htmldir='${docdir}/html'])

dnl FIXME remove when we assume autoconf 2.64
m4_ifndef([AC_PACKAGE_URL],
          [AC_DEFINE([PACKAGE_URL], ["http://dev.thep.lu.se/yat"],
                     [Define to home page for this package])
           AC_SUBST([PACKAGE_URL], ["http://dev.thep.lu.se/yat"])])

AC_SUBST([YAT_LT_VERSION], [YAT_LT_VERSION_INFO])
AC_DEFINE([YAT_VERSION], ["my_VERSION"], [version])

AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([1.11 std-options color-tests parallel-tests
                  silent-rules subdir-objects])

# Set default programming language
AC_LANG(C++)

# propagate selected configure variables to DISTCHECK_CONFIGURE_FLAGS
for var in CPPFLAGS CXX CXXFLAGS CXXCPP LDFLAGS LIBS; do
  eval isset=\${$var+set}
  if test "$isset" = 'set' ; then
    eval val=$`echo $var`
    DISTCHECK_CONFIGURE_FLAGS="${DISTCHECK_CONFIGURE_FLAGS}'${var}=${val}' "
  fi
done
AC_SUBST(DISTCHECK_CONFIGURE_FLAGS)

# record if CXXFLAGS was set by user for further use below
AS_IF([test "${CXXFLAGS+set}" = set], [
  CXXFLAGS_set_by_user=yes
],[
  AS_IF([test "${INTERNAL_CXXFLAGS+set}" = set], [
    CXXFLAGS_set_by_user=yes
  ], [
    CXXFLAGS_set_by_user=no
  ])
  # set CXXFLAGS to avoid expansion in AC_PROG_CXX
  CXXFLAGS=
])

# Checks for programs.
dnl FIXME remove m4_ifdef when we assume Automake 1.12
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_CXX
AC_PROG_SED
AC_PROG_LIBTOOL

# find the compiler vendor: gnu, intel, etc
AX_COMPILER_VENDOR

have_doxygen=no
AC_PATH_PROG([DOXYGEN], [doxygen], [no])
if test "$DOXYGEN" = "no"; then
   AC_MSG_WARN([unable to find doxygen application])
else
   doxygen_min_version=1.5
   AC_MSG_CHECKING([if doxygen is at least $doxygen_min_version])
   doxygen_version=`$DOXYGEN --version`
   AX_COMPARE_VERSION([$doxygen_version], [ge], [$doxygen_min_version],
                      [have_doxygen=yes], [have_doxygen=old])
   AC_MSG_RESULT([$doxygen_version])
fi

AC_SUBST(have_doxygen)
AM_CONDITIONAL([DX_ENABLE_HTML], [test x$have_doxygen = xyes])

# check for quiet_NaN support in OS
# Check at run-time, but if we are cross-compiling fall back on a
# compilation test
AC_MSG_CHECKING([if std::numeric_limits<>::has_quiet_NaN is true])
AC_RUN_IFELSE(
	[AC_LANG_PROGRAM(
		[@%:@include <limits>],
		[return !std::numeric_limits<double>::has_quiet_NaN])],
	[quiet_nan=yes
   AC_MSG_RESULT($quiet_nan)],
	[quiet_nan=no
   AC_MSG_RESULT($quiet_nan)],
	# if we are cross-compiling fall back on compilation test
	[AC_MSG_RESULT(cross-compiling)
   AC_MSG_CHECKING([for std::numeric_limits<>::quiet_NaN()])
	  AC_COMPILE_IFELSE(
	   [AC_LANG_PROGRAM(
	      [@%:@include <limits>
	       extern void f(double);],
	      [f(std::numeric_limits<double>::quiet_NaN())])],
	   [quiet_nan=yes],
	   [quiet_nan=no])
   AC_MSG_RESULT($quiet_nan)])
# No support for quiet NAN is fatal -- sub-sequent compilation, or execution
# of created binary, will fail.
AS_IF([test x"$quiet_nan" = x"no"], [
  AC_MSG_FAILURE([dnl
Support for quiet NAN required. yat will not work on this system!])
])

# Check for infinity support for doubles in OS
# Check at run-time, but if we are cross-compiling fall back on a
# compilation test
AC_MSG_CHECKING([if std::numeric_limits<>::has_infinity is true])
AC_RUN_IFELSE(
	[AC_LANG_PROGRAM(
		[@%:@include <limits>],
		[return !std::numeric_limits<double>::has_infinity])],
	[has_infinity=yes
   AC_MSG_RESULT($has_infinity)],
	[has_infinity=no
   AC_MSG_RESULT($has_infinity)],
	# if we are cross-compiling fall back on compilation test
	[AC_MSG_RESULT(cross-compiling)
   AC_MSG_CHECKING([for std::numeric_limits<>::infinity()])
	  AC_COMPILE_IFELSE(
	   [AC_LANG_PROGRAM(
	      [@%:@include <limits>
	       extern void f(double);],
	      [f(std::numeric_limits<double>::infinity())])],
	   [has_infinity=yes],
	   [has_infinity=no])
   AC_MSG_RESULT($has_infinity)])
# No support for infinity is fatal -- sub-sequent compilation, or execution
# of created binary, will fail.
AS_IF([test x"${has_infinity}" = x"no"], [
  AC_MSG_FAILURE([dnl
Support for infinity required. yat will not work on this system!])
])


AC_MSG_CHECKING([g++ deprecation attribute])
AC_COMPILE_IFELSE(
   [AC_LANG_PROGRAM([[void f() __attribute__ ((deprecated));]],)],
   [AC_DEFINE([YAT_HAVE_GCC_DEPRECATED], [1],
              [Define if compiler supports deprecated attribute, as in g++ 4.0])
    AC_MSG_RESULT([yes])],
   [AC_MSG_RESULT([no])] )

AC_MSG_CHECKING([if std::multiset::iterator is mutable])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <set>
                                     @%:@include <vector>]],
                                   [[std::set<std::vector<double> > s;
                                     std::vector<double> v;
                                     s.insert(v);
                                     s.begin()->reserve(100);
                                   ]])],
                  [AC_DEFINE([MULTISET_ITERATOR_IS_MUTABLE], [1],
                             [Define if std::multiset::iterator is mutable])
                   AC_MSG_RESULT([yes])
                  ],
                  [AC_MSG_RESULT([no])] )

# Save user-defined environment settings for later restoration
APR_SAVE_THE_ENVIRONMENT(CPPFLAGS)
APR_SAVE_THE_ENVIRONMENT(CXXFLAGS)
APR_SAVE_THE_ENVIRONMENT(LDFLAGS)
APR_SAVE_THE_ENVIRONMENT(LIBS)
user_LIBS=$LIBS

AS_CASE([$host_os], [darwin*], [
  YAT_LD_ADD_FLAG([LDFLAGS], [-Wl,-flat_namespace])
])

# prefer using libtool in link tests
YAT_USE_LIBTOOL_PUSH

# Checks for libraries.
AC_MSG_NOTICE([checking for libraries])
AC_CHECK_LIBM
LIBS="$LIBM $LIBS"
# we store libs in YAT_STATIC_LIBS that are not suitable to link into
# libyat but are needed when creating applications linking against
# libyat. Typically these are static (only) libraries, but see ticket
# 737 for discussion.
YAT_STATIC_LIBS=
YAT_CHECK_LA_LIBS([
  double cos(double x);
  double foo(double x) { return cos(x); }
], [$LIBS], [$LIBM], [YAT_STATIC_LIBS])

# find library implementing BLAS C API, or use gslcblas
YAT_LIB_CBLAS([YAT_CBLAS_LIB=$CBLAS_LIB], [YAT_CBLAS_LIB=-lgslcblas])
LIBS="$YAT_CBLAS_LIB $LIBS"

# GNU Scientific Library, GSL http://www.gnu.org/software/gsl/, checks
# Including AX_PATH_GSL macro from gsl.m4 distributed by GSL
gsl_version="1.8"
AC_SUBST(gsl_version)
YAT_CHECK_GSL([$gsl_version],[LIBS="-lgsl $LIBS"],[AC_MSG_FAILURE([dnl
GSL $gsl_version (or newer) not found. The GNU Scientific Library
(GSL) library cannot be found. Please make sure GSL is installed.])
])

YAT_CHECK_LA_LIBS([
  double gsl_cdf_hypergeometric_P(const unsigned int k, const unsigned int n1,
                                  const unsigned int n2, const unsigned int t);
  double yat_foo(void) { return gsl_cdf_hypergeometric_P(1,2,3,10); }
], [$LIBS], [-lgsl], [YAT_STATIC_LIBS])

# Boost http://www.boost.org
boost_version=1.35
AC_SUBST(boost_version)
AX_BOOST_BASE(["$boost_version"], [], [AC_MSG_FAILURE([dnl
Boost ${boost_version} (or newer) not found. Please install boost, or provide
CPPFLAGS=-I/path/to/boost])
])
# skip boost link tests if boost is not wanted (--without-boost)
AS_IF([test x"$want_boost" = x"yes"],[
  AX_BOOST_THREAD
  AX_BOOST_SYSTEM
  YAT_CPP_ADD_FLAG([CPPFLAGS], [$BOOST_CPPFLAGS])
  YAT_LD_ADD_FLAG([LDFLAGS], [$BOOST_LDFLAGS])
  # boost tests above only test compilation, so let's try link in the libs
  LIBS="$LIBS $BOOST_THREAD_LIB $BOOST_SYSTEM_LIB"
  AC_MSG_CHECKING([for thread_specific_ptr])
  AC_LINK_IFELSE([AC_LANG_PROGRAM([@%:@include <boost/thread/tss.hpp>],
                                  [boost::thread_specific_ptr<int> x;
                                   x.reset(new int(1));])],
                 [AC_MSG_RESULT([yes])],
                 [AC_MSG_RESULT([no])
                  AC_MSG_FAILURE([Boost thread library not found.])
                 ])
  # Check if $BOOST_THREAD_LIB is appropriate for libyat.la
  YAT_CHECK_LA_LIBS([
    @%:@include <boost/thread.hpp>
    int my_func(void)
    { boost::mutex mutex_; return 0; }
  ], [$BOOST_THREAD_LIB $user_LIBS], [$BOOST_THREAD_LIB], [YAT_STATIC_LIBS])
  # Check if $BOOST_SYSTEM_LIB is appropriate for libyat.la
  YAT_CHECK_LA_LIBS([
    @%:@include <boost/system/error_code.hpp>
    int my_func(void)
    { boost::system::system_category; return 0; }
  ], [$BOOST_SYSTEM_LIB $user_LIBS], [$BOOST_SYSTEM_LIB], [YAT_STATIC_LIBS])
])

# see tickets #648 #687
AC_MSG_CHECKING([whether constructor in boost concept is supported])
AC_COMPILE_IFELSE([
  AC_LANG_PROGRAM(
    [
     @%:@include <boost/concept_check.hpp>
     template <typename T>
     class MyConcept
     {
     public:
       MyConcept(void) {}
       BOOST_CONCEPT_USAGE(MyConcept){}
     };
    ],[
     MyConcept<double> x;
     x = x;
    ])
  ],
  [AC_MSG_RESULT([yes])
   AC_DEFINE([YAT_HAVE_BOOST_CONCEPT_WITH_CONSTRUCTOR],[1],
             [define if compiler supports boost concept with constructor])
  ],
  [AC_MSG_RESULT([no])]
)

# Workaround problem that boost 1.41 does not work with certain versions of GCC
# see ticket #762
AC_MSG_CHECKING([if boost::mutex workaround is needed])
AC_COMPILE_IFELSE(
  [AC_LANG_PROGRAM([@%:@include <boost/thread.hpp>],
                   [boost::mutex mutex;]
   )],
  [AC_MSG_RESULT([no])
   AC_DEFINE([YAT_HAVE_WORKING_BOOST_EXCEPTION_PTR], [1],
             [Define to 1 if boost::exception_ptr works])
  ],
  [AC_MSG_RESULT([yes])])

# Check if boost::iterator_facade::operator-> works with a proxy class
# as reference_type; otherwise workaround is needed in
# e.g. BamPairIterator. See ticket #790.
AC_MSG_CHECKING([if boost::iterator_facade::operator-> works])
AC_COMPILE_IFELSE(
  [AC_LANG_PROGRAM(
    [@%:@include <iterator>
     @%:@include <boost/iterator/iterator_facade.hpp>
     struct MyClass { void foo(void) const { } };
     struct MyProxy { void foo(void) const { } };
     // a nonsense class (only for compiler test purposes)
		 class MyIterator
		   : public boost::iterator_facade<
        MyIterator, const MyClass, std::input_iterator_tag, MyProxy
       >
     {
       friend class boost::iterator_core_access;
       const MyProxy dereference(void) const { return MyProxy(); }
       bool equal(const MyIterator& other) const { return true; }
       void increment(void) {}
     };
    ],
    [MyIterator iter; iter->foo();]
    )
  ],[
    AC_MSG_RESULT([yes])
    AC_DEFINE([YAT_HAVE_BOOST_ITERATOR_FACADE_PROXY_PTR], [1],
              [Define to 1 if boost::iterator_facade::operator-> works])
  ],[
    AC_MSG_RESULT([no])
  ])

# samtools API from http://samtools.sourceforge.net
AC_ARG_WITH([samtools],
            [AS_HELP_STRING([--without-samtools],
                            [disable samtools support])],
            [],
            [with_samtools=yes])

AS_IF([test x"$with_samtools" != x"no"], [
  AC_CHECK_HEADER([zlib.h], [],
    [AC_MSG_FAILURE([header file 'zlib.h' was not found])])
  AC_SEARCH_LIBS([inflateEnd], [z], [],
    [AC_MSG_FAILURE([library 'libz' was not found])])
  LIBZ=$ac_cv_search_inflateEnd
  AS_IF([test x"$LIBZ" = x"none required"], [LIBZ=])
  YAT_CHECK_LA_LIBS([
    @%:@include <zlib.h>
    int my_func(void)
    { z_streamp zs; inflateEnd(zs); return 0; }
  ], [$LIBZ $user_LIBS], [$LIBZ], [YAT_STATIC_LIBS])
  YAT_CHECK_HEADER_BAM([],[AC_MSG_FAILURE([header file 'bam.h' was not found])])
  # try link against libbam
  YAT_CHECK_LIBBAM([LIBS="$BAM_LIBS $LIBS"
                    AC_DEFINE([YAT_HAVE_LIBBAM], [1],
                              [Define to 1 if libbam is available])],
    [AC_MSG_FAILURE([library 'libbam' was not found])])
  YAT_CHECK_LA_LIBS([
    _YAT_BAM_INCLUDES
    void my_func(bam_header_t* hdr) { bam_header_destroy(hdr); }
  ], [$BAM_LIBS $LIBZ $user_LIBS], [$BAM_LIBS], [YAT_STATIC_LIBS])
  # check if global variable bam_nt16_rev_table is available
  YAT_BAM_NT16_REV_TABLE
  # check if function bam_calend works. Result of this test can be
  # overridden by setting variable 'yat_cv_func_bam_calend'
  YAT_FUNC_BAM_CALEND([$srcdir/test/data/foo.sam])
  AC_PATH_PROG([SAMTOOLS], [samtools], [false])
  AC_ARG_VAR([SAMTOOLS], [Tools for alignment in the SAM format])
], [
  SAMTOOLS=false
])
AM_CONDITIONAL([HAVE_LIBBAM], [test x"$with_samtools" = x"yes"])
have_libbam=$with_samtools
AC_SUBST([have_libbam])
AM_CONDITIONAL([HAVE_SAMTOOLS], [test x"$SAMTOOLS" != x"false"])
AC_SUBST([SAMTOOLS])
AS_IF([test x"$SAMTOOLS" = x"false"], [], [
  AC_DEFINE([HAVE_SAMTOOLS], [1], [Define if samtools executable is available])
])

#support for large files
AC_SYS_LARGEFILE
if test "$enable_largefile" = "no"; then
  AC_DEFINE([YAT_LFS_DISABLED], 1,
            [defined to 1 if large file support is disabled])
fi

AC_DEFINE([HAVE_INLINE], [1], [Define if inline is available on system])
# default is same as --disable-debug
AC_ARG_ENABLE([debug],
	[AS_HELP_STRING([--enable-debug],[turn on debug options and code])],
        [], [enable_debug=no])

# If neither --enable-assert nor --disable-assert, set enable_assert
# to same as enable_debug
AC_ARG_ENABLE([assert],
              [AS_HELP_STRING([--enable-assert], [turn on assertions])],
              [], [enable_assert=$enable_debug])

# we use prefix INTERNAL_ for variables that are solely needed for
# building yat, i.e., they are not needed for a user of yat and are
# not propagated to yat-config or yat.m4.
AC_ARG_VAR([INTERNAL_CPPFLAGS],
           [Similar to CPPFLAGS but value is not propagated to yat-config])
AC_ARG_VAR([INTERNAL_CXXFLAGS],
           [Similar to CXXFLAGS but value is not propagated to yat-config])
AC_ARG_VAR([INTERNAL_LDFLAGS],
           [Similar to LDFLAGS but value is not propagated to yat-config])

AS_IF([test "${enable_debug}" = "yes"], [
  AC_DEFINE([YAT_DEBUG], [1], [Define to activate yat assertioons])
	YAT_CXX_ADD_FLAG([INTERNAL_CXXFLAGS], [-Wall -pedantic -g -O])
], [
  # avoid defining GSL_RANGE_CHECK_OFF if GSL_RANGE_CHECK is already defined
  AC_CHECK_DECL([GSL_RANGE_CHECK],[],
                [AC_DEFINE([GSL_RANGE_CHECK_OFF], [1],
                           [Define to turn off GSL range checks])])
  # If CXXFLAGS not set by user, set it to default value
  AS_IF([test x$CXXFLAGS_set_by_user != xyes], [
    YAT_CXX_ADD_FLAG([INTERNAL_CXXFLAGS],[-O3])
  ])
])

AS_IF([test x"$enable_assert" = x"no"], [
  AC_DEFINE([NDEBUG], [1], [Define to turn off assertions])
])

# turn off compiler warning #654 from intel compiler
AS_IF([test x"$ax_cv_cxx_compiler_vendor" = x"intel"], [
  YAT_CXX_ADD_FLAG([CXXFLAGS], ['-diag-disable 654'])
])

# Turns warnings to errors in compilation tests. Only put tests that
# should be warning sensitive below this point. Can't find any
# mechanism to revert AC_LANG_WERROR
AC_LANG_WERROR

# GCC 4.0.1 on OSX complains about -pthread (issue #713)
AS_IF([AS_ECHO(["$CPPFLAGS"]) | $GREP '\-pthread' > /dev/null],
  [AX_CHECK_PREPROC_FLAG([-pthread], [],
     [CPPFLAGS=`AS_ECHO(["$CPPFLAGS"]) | $SED 's%-pthread%%'`],
     [$INTERNAL_CPPFLAGS])
])

# When compiling boost::Mutable_*Iterator some versions of clang complains:
# warning: unsequenced modification and access to 'i' [-Wunsequenced]
# Test if compiler gives that warning, and if it does turn it off.
yat_save_CXXFLAGS=$CXXFLAGS
AC_MSG_CHECKING([whether 'boost/concept_check.hpp' causes compiler warnings])
CXXFLAGS="$INTERNAL_CXXFLAGS $CXXFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
  [
    @%:@include <boost/concept_check.hpp>
  ],[
		BOOST_CONCEPT_ASSERT((boost::Mutable_RandomAccessIterator<double* >));
  ])
], [ # IF-SUCCESSFUL
  AC_MSG_RESULT([no])
  # restore CXXFLAGS
  CXXFLAGS=$yat_save_CXXFLAGS
], [ # IF-FAILED
  AC_MSG_RESULT([yes])
  CXXFLAGS=$yat_save_CXXFLAGS
  YAT_CXX_ADD_FLAG([CXXFLAGS], [-Wno-unsequenced])
])


AS_IF([test x$enable_debug = xyes], [
  # some versions of boost uses long long - turn off compiler warnings
  # with -Wno-long-long
  yat_save_CXXFLAGS=$CXXFLAGS
  AC_MSG_CHECKING([whether boost uses long long])
  CXXFLAGS="$INTERNAL_CXXFLAGS $CXXFLAGS"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
    [
      @%:@include <boost/iterator/transform_iterator.hpp>
      @%:@include <boost/thread.hpp>
      @%:@include <cmath>
      @%:@include <functional>
      @%:@include <vector>
    ],[
      using namespace boost;
      typedef std::pointer_to_unary_function<double, double> F;
      std::vector<double> vec;
      transform_iterator<F, std::vector<double>::iterator>
        i(vec.begin(), std::ptr_fun(fabs));
      int x = boost::thread::hardware_concurrency();
      ++x;
    ])],
  [AC_MSG_RESULT([no])],
  [AC_MSG_RESULT([yes])
   YAT_CXX_ADD_FLAG([INTERNAL_CXXFLAGS], [-Wno-long-long])
  ])
  # restore CXXFLAGS
  CXXFLAGS=$yat_save_CXXFLAGS
])

#doxygen stuff
DX_HTML_OUTPUT=html
AC_SUBST(DX_HTML_OUTPUT)

AC_CONFIG_FILES([build_support/gen_yat_pc.sh],
                [chmod +x build_support/gen_yat_pc.sh])
AC_CONFIG_FILES([build_support/gen_announce.sh],
                [chmod +x-w build_support/gen_announce.sh])
AC_CONFIG_FILES([Makefile
		 doc/doxygen.config
		 doc/first_page.doxygen
                 test/defs.sh
])

AC_CONFIG_HEADERS([yat/utility/config_public.h])
# for the test suite
yat_abs_top_srcdir=`cd $srcdir && pwd`
AC_DEFINE_UNQUOTED([YAT_ABS_TOP_SRCDIR], ["$yat_abs_top_srcdir"],
                   [Define to absolute path to top yat src dir])

# Reset flags
APR_RESTORE_THE_ENVIRONMENT(CPPFLAGS, YAT_)
APR_RESTORE_THE_ENVIRONMENT(CXXFLAGS, YAT_)
APR_RESTORE_THE_ENVIRONMENT(LDFLAGS, YAT_)
APR_RESTORE_THE_ENVIRONMENT(LIBS, YAT_)

# Set some variables useful when linking
AC_SUBST([YAT_STATIC_LIBS])

# libs used in libyat.la
yat_libyat_la_LIBADD="$YAT_LIBS"
# We avoid linking in cblas in libyat.la, to let users choose
# favourite cblas library at link time.
YAT_VAR_REMOVE([yat_libyat_la_LIBADD], [$YAT_CBLAS_LIB])
# we avoid linking in YAT_STATIC_LIBS as they have been detected to
# not be suitable libtool archive.
YAT_VAR_REMOVE([yat_libyat_la_LIBADD], [$YAT_STATIC_LIBS])
AC_SUBST([yat_libyat_la_LIBADD])

# Primary LIBS are same as linked into libyat.la excluding LIBM
YAT_PRIMARY_LIBS=$yat_libyat_la_LIBADD
YAT_VAR_REMOVE([YAT_PRIMARY_LIBS], [$LIBM])
AC_SUBST(YAT_PRIMARY_LIBS)

# Assign LIBS variables for yat.pc
YAT_PC_LIBS=$YAT_LIBS
# Dependency to GSL is noted via 'Requires' field
YAT_VAR_REMOVE([YAT_PC_LIBS], [-lgsl $YAT_CBLAS_LIB $LIBM])
AC_SUBST([YAT_PC_LIBS])

AC_SUBST(YAT_LIBS)
AC_SUBST(YAT_CBLAS_LIB)

# set and AC_SUBST variables that are interpreted by Automake
AM_CPPFLAGS="$INTERNAL_CPPFLAGS $YAT_CPPFLAGS"
AM_CXXFLAGS="$INTERNAL_CXXFLAGS $YAT_CXXFLAGS"
AM_LDFLAGS="$INTERNAL_LDFLAGS $YAT_LDFLAGS"

AC_SUBST(AM_CPPFLAGS)
AC_SUBST(AM_CXXFLAGS)
AC_SUBST(AM_LDFLAGS)
AC_SUBST([enable_shared])
AC_SUBST([enable_static])

# Name of directory libtool put stuff int - needed for some tests
AC_SUBST([lt_cv_objdir])

YAT_SVN_RELEASE([am/maintainer.am])

# make shell tests work in VPATH builds
AC_CONFIG_LINKS([test/init.sh:test/init.sh])

# set some variable for final message
AS_CASE([$have_doxygen],
        [yes], [doxygen_message=yes],
        [no], [doxygen_message="no (doxygen not found)"],
        [old], [doxygen_message="no (\`$DOXYGEN' too old)"],
        [AC_MSG_WARN([unexpected value \$have_doxygen: '$have_doxygen'])
         AS_BOX([Report this to ]AC_PACKAGE_BUGREPORT)
        ])

yat_gslcblas_message=
AS_IF([test "x$YAT_CBLAS_LIB" = "x-lgslcblas"], [
yat_gslcblas_message='
  GSL CBLAS found. This is a reference implementation only.
  Consider using hardware optimized BLAS.
  ATLAS (http://math-atlas.sourceforge.net/) provides an
  optimized BLAS library. It is supported by yat!
'
])

# Create output.
AC_OUTPUT


# Some more messages.
AC_MSG_RESULT([
yat is configured as follows:

  Build Shared Library: $enable_shared
  Build Static Library: $enable_static
  Build Documentation:  $doxygen_message
  With Bam Support:     $with_samtools

Options used to compile and link:
  VERSION     = $VERSION
  CXX         = $CXX
  CPPFLAGS    = $CPPFLAGS
  YAT_CPPFLAGS= $AM_CPPFLAGS
  CXXFLAGS    = $CXXFLAGS
  YAT_CXXFLAGS= $AM_CXXFLAGS
  LD          = $LD
  LDFLAGS     = $LDFLAGS
  YAT_LDFLAGS = $AM_LDFLAGS
  LIBS        = $LIBS
  YAT_LIBS    = $YAT_LIBS
${yat_gslcblas_message}dnl
----------------------------------------------------------------
Now type `make'. dnl
])