# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

# $Id$

# This file is part of libsydney.
#
# libsydney is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# libsydney 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 Lesser General Public License
# along with libsydney; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

AC_PREREQ(2.57)

AC_INIT([libsydney], 0.1, [mzyvoflqarl (at) 0pointer (dot) de])
AC_CONFIG_SRCDIR([src/common.c])
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([foreign -Wall])

AC_SUBST(PACKAGE_URL, [https://tango.0pointer.de/mailman/listinfo/libsydney-discuss/])

AC_SUBST(LIBSYDNEY_VERSION_INFO, [0:0:0])

AC_CANONICAL_HOST

if type -p stow > /dev/null && test -d /usr/local/stow ; then
   AC_MSG_NOTICE([*** Found /usr/local/stow: default install prefix set to /usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION} ***])
   ac_default_prefix="/usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION}"
fi

#### Checks for programs. ####

# CC

AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_GCC_TRADITIONAL
AC_GNU_SOURCE

# GCC flags

test_gcc_flag() {
    AC_LANG_CONFTEST([int main(int argc, char*argv[]) {}])
    $CC -c conftest.c $CFLAGS -o conftest.o > /dev/null 2> /dev/null
    ret=$?
    rm -f conftest.o
    return $ret
}

# If using GCC specify some additional parameters
if test "x$GCC" = "xyes" ; then

    # We use gnu99 instead of c99 because many have interpreted the standard
    # in a way that int64_t isn't defined on non-64 bit platforms.
    DESIRED_FLAGS="-std=gnu99 -Wall -W -Wextra -pedantic -pipe -Wformat -Wold-style-definition -Wdeclaration-after-statement -Wfloat-equal -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-noreturn -Wshadow -Wendif-labels -Wpointer-arith -Wcast-align -Wwrite-strings -Winline -Wno-unused-parameter -ffast-math"

    for flag in $DESIRED_FLAGS ; do
        AC_MSG_CHECKING([whether $CC accepts $flag])
        if test_gcc_flag $flag ; then
           CFLAGS="$CFLAGS $flag"
           AC_MSG_RESULT([yes])
        else
           AC_MSG_RESULT([no])
        fi
    done
fi

#### libtool stuff ####

AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL

#### Determine build environment ####

os_is_win32=0

case "$host_os" in
	mingw*)
        AC_DEFINE([OS_IS_WIN32], 1, [Build target is Windows.])
        os_is_win32=1
		;;
	esac

AM_CONDITIONAL(OS_IS_WIN32, test "x$os_is_win32" = "x1")

###################################
#   Basic environment checks      #
###################################

#### Checks for header files. ####

# ISO
AC_HEADER_STDC

# XPG4-UNIX
AC_CHECK_HEADERS([sys/poll.h])

# Other
AC_CHECK_HEADERS([sys/ioctl.h])
AC_CHECK_HEADERS([byteswap.h])

#### Typdefs, structures, etc. ####

AC_C_CONST
AC_C_BIGENDIAN
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_CHECK_TYPES(ssize_t, , [AC_DEFINE([ssize_t], [signed long],
    [Define ssize_t if it is not done by the standard libs.])])
AC_TYPE_OFF_T
AC_TYPE_SIGNAL
AC_TYPE_UID_T

#### Check for libs ####

# ISO
AC_SEARCH_LIBS([pow], [m])

# POSIX
AC_SEARCH_LIBS([sched_setscheduler], [rt])

# Non-standard

#### Check for functions ####

# ISO
AC_CHECK_FUNCS([lrintf strtof])

# POSIX
AC_FUNC_SELECT_ARGTYPES
AC_CHECK_FUNCS([gettimeofday nanosleep posix_memalign sigaction sleep sysconf pthread_yield])

# SUSv3
AC_CHECK_FUNCS([strerror_r])

# BSD
AC_CHECK_FUNCS([lstat])

#### POSIX threads ####

ACX_PTHREAD

AC_MSG_CHECKING([for PTHREAD_PRIO_INHERIT])
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
#include <pthread.h>
int main() { int i = PTHREAD_PRIO_INHERIT; }]])])
$PTHREAD_CC conftest.c $PTHREAD_CFLAGS $CFLAGS $PTHREAD_LIBS -o conftest > /dev/null 2> /dev/null
ret=$?
rm -f conftest.o conftest

if test $ret -eq 0 ; then
    AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], 1, [Have PTHREAD_PRIO_INHERIT.])
    AC_MSG_RESULT([yes])
else
    AC_MSG_RESULT([no])
fi


#### Large File-Support (LFS) ####

AC_SYS_LARGEFILE

# Check for open64 to know if the current system does have open64() and similar functions
AC_CHECK_FUNCS([open64])

#### [lib]iconv ####

AM_ICONV

###################################
#      External libraries         #
###################################

#### pkg-config ####

# Check for pkg-config manually first, as if its not installed the
# PKG_PROG_PKG_CONFIG macro won't be defined.
AC_CHECK_PROG(have_pkg_config, pkg-config, yes, no)

if test x"$have_pkg_config" = "xno"; then
    AC_MSG_ERROR(pkg-config is required to install this program)
fi

PKG_PROG_PKG_CONFIG

#### OSS support (optional) ####

AC_ARG_ENABLE([oss],
    AC_HELP_STRING([--disable-oss], [Disable optional OSS support]),
        [
            case "${enableval}" in
                yes) oss=yes ;;
                no) oss=no ;;
                *) AC_MSG_ERROR(bad value ${enableval} for --disable-oss) ;;
            esac
        ],
        [oss=auto])

if test "x${oss}" != xno ; then
    AC_CHECK_HEADERS([sys/soundcard.h],
        [
            HAVE_OSS=1
            AC_DEFINE([HAVE_OSS], 1, [Have OSS?])
        ],
        [
            HAVE_OSS=0
            if test "x$oss" = xyes ; then
                AC_MSG_ERROR([*** OSS support not found])
            fi
        ])
else
    HAVE_OSS=0
fi

AC_SUBST(HAVE_OSS)
AM_CONDITIONAL([HAVE_OSS], [test "x$HAVE_OSS" = x1])

#### ALSA support (optional) ####

AC_ARG_ENABLE([alsa],
    AC_HELP_STRING([--disable-alsa], [Disable optional ALSA support]),
        [
            case "${enableval}" in
                yes) alsa=yes ;;
                no) alsa=no ;;
                *) AC_MSG_ERROR(bad value ${enableval} for --disable-alsa) ;;
            esac
        ],
        [alsa=auto])

if test "x${alsa}" != xno ; then
    PKG_CHECK_MODULES(ASOUNDLIB, [ alsa >= 1.0.0 ],
        [
            HAVE_ALSA=1
            AC_DEFINE([HAVE_ALSA], 1, [Have ALSA?])
        ],
        [
            HAVE_ALSA=0
            if test "x$alsa" = xyes ; then
                AC_MSG_ERROR([*** ALSA support not found])
            fi
        ])
else
    HAVE_ALSA=0
fi

AC_SUBST(ASOUNDLIB_CFLAGS)
AC_SUBST(ASOUNDLIB_LIBS)
AC_SUBST(HAVE_ALSA)
AM_CONDITIONAL([HAVE_ALSA], [test "x$HAVE_ALSA" = x1])

#### Solaris audio support (optional) ####

AC_ARG_ENABLE([solaris],
    AC_HELP_STRING([--disable-solaris], [Disable optional Solaris audio support]),
        [
            case "${enableval}" in
                yes) solaris=yes ;;
                no) solaris=no ;;
                *) AC_MSG_ERROR(bad value ${enableval} for --disable-solaris) ;;
            esac
        ],
        [solaris=auto])

if test "x${solaris}" != xno ; then
    AC_CHECK_HEADERS([sys/audio.h],
        [
            HAVE_SOLARIS=1
            AC_DEFINE([HAVE_SOLARIS], 1, [Have Solaris audio?])
        ],
        [
            HAVE_SOLARIS=0
            if test "x$solaris" = xyes ; then
                AC_MSG_ERROR([*** Solaris audio support not found])
            fi
        ])
else
    HAVE_SOLARIS=0
fi

AC_SUBST(HAVE_SOLARIS)
AM_CONDITIONAL([HAVE_SOLARIS], [test "x$HAVE_SOLARIS" = x1])

### LIBOIL ####

PKG_CHECK_MODULES(LIBOIL, [ liboil-0.3 >= 0.3.0 ])
AC_SUBST(LIBOIL_CFLAGS)
AC_SUBST(LIBOIL_LIBS)

### JACK (optional) ####

AC_ARG_ENABLE([jack],
    AC_HELP_STRING([--disable-jack], [Disable optional JACK support]),
        [
            case "${enableval}" in
                yes) jack=yes ;;
                no) jack=no ;;
                *) AC_MSG_ERROR(bad value ${enableval} for --disable-jack) ;;
            esac
        ],
        [jack=auto])

if test "x${jack}" != xno ; then
    PKG_CHECK_MODULES(JACK, [ jack >= 0.100 ],
        HAVE_JACK=1,
        [
            HAVE_JACK=0
            if test "x$jack" = xyes ; then
                AC_MSG_ERROR([*** JACK support not found])
            fi
        ])
else
    HAVE_JACK=0
fi

AC_SUBST(JACK_CFLAGS)
AC_SUBST(JACK_LIBS)
AC_SUBST(HAVE_JACK)
AM_CONDITIONAL([HAVE_JACK], [test "x$HAVE_JACK" = x1])

###################################
#            Output               #
###################################

AC_CONFIG_FILES([
Makefile
src/Makefile
libsydney.pc
])
AC_OUTPUT

# ==========================================================================
ENABLE_OSS=no
if test "x$HAVE_OSS" = "x1" ; then
   ENABLE_OSS=yes
fi

ENABLE_ALSA=no
if test "x$HAVE_ALSA" = "x1" ; then
   ENABLE_ALSA=yes
fi

ENABLE_SOLARIS=no
if test "x$HAVE_SOLARIS" = "x1" ; then
   ENABLE_SOLARIS=yes
fi

ENABLE_JACK=no
if test "x$HAVE_JACK" = "x1" ; then
   ENABLE_JACK=yes
fi

echo "
 ---{ $PACKAGE_NAME $VERSION }---

    prefix:                 ${prefix}
    sysconfdir:             ${sysconfdir}
    localstatedir:          ${localstatedir}
    Compiler:               ${CC}
    CFLAGS:                 ${CFLAGS}
    Enable OSS:             ${ENABLE_OSS}
    Enable Alsa:            ${ENABLE_ALSA}
    Enable Solaris:         ${ENABLE_SOLARIS}
    Enable Jack:            ${ENABLE_JACK}
"