configure

#!/bin/sh
#
# omc configure script - (c) 2006 Alexis Saettler, 2007 Benjamin Zores
#
#  (fully inspirated from ffmpeg configure script, thanks to Fabrice Bellard)
#

# make sure we are running under a compatible shell
unset foo
(: ${foo%%bar}) 2>/dev/null && ! (: ${foo?}) 2>/dev/null
if test "$?" != 0; then
    if test "x$OMC_CONFIGURE_EXEC" = x; then
        OMC_CONFIGURE_EXEC=1
        export OMC_CONFIGURE_EXEC
        exec bash "$0" "$@"
        exec ksh "$0" "$@"
        exec /usr/xpg4/bin/sh "$0" "$@"
    fi
    echo "No compatible shell script interpreter found."
    exit 1
fi

show_help(){
  echo "Usage: configure [options]"
  echo "Options: [defaults in brackets after descriptions]"
  echo
  echo "Standard options:"
  echo "  --help                      print this message"
  echo "  --log[=FILE|yes|no]         log tests and output to FILE [config.log]"
  echo "  --prefix=PREFIX             install in PREFIX [$PREFIX]"
  echo "  --bindir=DIR                install bins in DIR [PREFIX/bin]"
  echo "  --datadir=DIR               install config files in DIR [PREFIX/share]"
  echo "  --sysconfdir=DIR            install config files in DIR [PREFIX/etc]"
  echo "  --libdir=DIR                install libs in DIR [PREFIX/lib]"
  echo "  --includedir=DIR            install includes in DIR [PREFIX/include]"
  echo "  --mandir=DIR                install man page in DIR [PREFIX/man]"
  echo "  --with-sdl-prefix=DIR       check for SDL installed in DIR"
  echo "  --with-curl-prefix=DIR      check for curl installed in DIR"
  echo "  --with-libplayer-dir=DIR    check for libplayer installed in DIR"
  echo ""
  echo "Advanced options (experts only):"
  echo "  --disable-debug             disable debugging symbols"
  echo "  --disable-strip             disable stripping of executables at installation"
  echo "  --disable-optimize          disable compiler optimization"
  echo "  --cross-prefix=PREFIX       use PREFIX for compilation tools [$cross_prefix]"
  echo "  --cross-compile             assume a cross-compiler is used"
  exit 1
}

log(){
    echo "$@" >>$logfile
}

log_file(){
    log BEGIN $1
    cat -n $1 >>$logfile
    log END $1
}

echolog(){
    log "$@"
    echo "$@"
}

clean(){
    rm -f $TMPC $TMPO $TMPE $TMPS $TMPH
}

die(){
    echolog "$@"
    if enabled logging; then
      echo "See file \"$logfile\" produced by configure for more details."
    else
      echo "Rerun configure with logging enabled (do not use --log=no) for more details."
    fi
    clean
    exit 1
}

enabled(){
    eval test "x\$$1" = "xyes"
}

flags_saved(){
    (: ${SAVE_CFLAGS?}) 2>/dev/null
}

save_flags(){
    flags_saved && return
    SAVE_CFLAGS="$CFLAGS"
    SAVE_LDFLAGS="$LDFLAGS"
    SAVE_extralibs="$extralibs"
}

restore_flags(){
    CFLAGS="$SAVE_CFLAGS"
    LDFLAGS="$SAVE_LDFLAGS"
    extralibs="$SAVE_extralibs"
    unset SAVE_CFLAGS
    unset SAVE_LDFLAGS
    unset SAVE_extralibs
}

temp_cflags(){
    temp_append CFLAGS "$@"
}

temp_ldflags(){
    temp_append LDFLAGS "$@"
}

temp_extralibs(){
    temp_append extralibs "$@"
}

temp_append(){
    local var
    var=$1
    shift
    save_flags
    append_var "$var" "$@"
}

append_var(){
    local var f
    var=$1
    shift
    for f in $@; do
      if eval echo \$$var | grep -qv -e "$f"; then
        eval "$var=\"\$$var $f\""
      fi
    done
}

append(){
    local var
    var=$1
    shift
    flags_saved && append_var "SAVE_$var" "$@"
    append_var "$var" "$@"
}

add_cflags(){
    append CFLAGS "$@"
}

add_ldflags(){
    append LDFLAGS "$@"
}

add_extralibs(){
    append extralibs "$@"
}

check_cmd(){
    log "$@"
    "$@" >>$logfile 2>&1
}

check_cc(){
    log check_cc "$@"
    cat >$TMPC
    log_file $TMPC
    check_cmd $cc $CFLAGS "$@" -c -o $TMPO $TMPC
}

check_cpp(){
    log check_cpp "$@"
    cat >$TMPC
    log_file $TMPC
    check_cmd $cc $CFLAGS "$@" -E -o $TMPO $TMPC
}

check_ld(){
    log check_ld "$@"
    check_cc || return
    check_cmd $cc $LDFLAGS "$@" -o $TMPE $TMPO $extralibs
}

check_exec(){
    check_ld "$@" && { enabled cross_compile || $TMPE >>$logfile 2>&1; }
}

check_cflags(){
    log check_cflags "$@"
    check_cc "$@" <<EOF && add_cflags "$@"
int x;
EOF
}

check_ldflags(){
    log check_ldflags "$@"
    check_ld "$@" <<EOF && add_ldflags "$@"
int main(){
    return 0;
}
EOF
}

check_header(){
    local header
    log check_header "$@"
    header=$1
    shift
    check_cpp "$@" <<EOF
#include <$header>
int x;
EOF
}

check_func(){
    local func
    log check_func "$@"
    func=$1
    shift
    check_ld "$@" <<EOF
extern int $func();
int main(){
    $func();
}
EOF
}

check_lib(){
    local header func err
    log check_lib "$@"
    header="$1"
    func="$2"
    shift 2
    temp_extralibs "$@"
    check_header $header && check_func $func && add_extralibs "$@"
    err=$?
    restore_flags
    return $err
}

check_libconfig(){
    local config func ccflags clibs err
    log check_libconfig "$@"
    config="$1"
    func="$2"
    ccflags="${3:---cflags}"
    clibs="${4:---libs}"
    err=1
    if `which "$config" 1>/dev/null 2>&1`; then
      cflags=`$config $ccflags`
      [ -n "$cflags" ] && check_cflags "$cflags"
      libs=`$config $clibs`
      if [ -n "$libs" ]; then
        temp_extralibs "$libs"
        check_func $func && add_extralibs "$libs"
        err=$?
        restore_flags
      fi
    fi
    return $err
}

append_header(){
    echo "$@" >> $TMPH
}

append_config(){
    echo "$@" >> $CONFIGFILE
}

# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

TMPC="${TMPDIR1}/omc-${RANDOM}-$$-${RANDOM}.c"
TMPO="${TMPDIR1}/omc-${RANDOM}-$$-${RANDOM}.o"
TMPE="${TMPDIR1}/omc-${RANDOM}-$$-${RANDOM}"
TMPS="${TMPDIR1}/omc-${RANDOM}-$$-${RANDOM}.S"
TMPH="${TMPDIR1}/omc-${RANDOM}-$$-${RANDOM}.h"

CONFIGFILE="config.mak"

#################################################
#   set default parameters
#################################################
logging="yes"
logfile="config.log"
PREFIX="/usr/local"
bindir='${PREFIX}/bin'
datadir='${PREFIX}/share'
sysconfdir='${PREFIX}/etc'
libdir='${PREFIX}/lib'
includedir='${PREFIX}/include'
mandir='${PREFIX}/man'
cc="gcc"
ar="ar"
ranlib="ranlib"
make="make"
strip="strip"
cpu=`uname -m`
optimize="yes"
debug="yes"
dostrip="yes"
extralibs=""
installstrip="-s"
cross_compile="no"
INSTALL="install"

#################################################
#   set cpu variable and specific cpu flags
#################################################
case "$cpu" in
  i386|i486|i586|i686|i86pc|BePC)
    cpu="x86"
  ;;
  x86_64|amd64)
    cpu="x86"
    canon_arch="`$cc -dumpmachine | sed -e 's,\([^-]*\)-.*,\1,'`"
    if [ x"$canon_arch" = x"x86_64" -o x"$canon_arch" = x"amd64" ]; then
      if [ -z "`echo $CFLAGS | grep -- -m32`"  ]; then
        cpu="x86_64"
      fi
    fi
  ;;
# armv4l is a subset of armv5tel
  arm|armv4l|armv5tel)
    cpu="armv4l"
  ;;
  alpha)
    cpu="alpha"
  ;;
  "Power Macintosh"|ppc|ppc64|powerpc)
    cpu="powerpc"
  ;;
  mips|mipsel|IP*)
    cpu="mips"
  ;;
  sun4u|sparc64)
    cpu="sparc64"
  ;;
  sparc)
    cpu="sparc"
  ;;
  sh4)
    cpu="sh4"
  ;;
  parisc|parisc64)
    cpu="parisc"
  ;;
  s390|s390x)
    cpu="s390"
  ;;
  m68k)
    cpu="m68k"
  ;;
  ia64)
    cpu="ia64"
  ;;
  bfin)
    cpu="bfin"
  ;;
  *)
    cpu="unknown"
  ;;
esac


#################################################
#   check options
#################################################
for opt do
  optval="${opt#*=}"
  case "$opt" in
  --log)
  ;;
  --log=*) logging="$optval"
  ;;
  --prefix=*) PREFIX="$optval"; force_prefix=yes
  ;;
  --bindir=*) bindir="$optval"
  ;;
  --datadir=*) datadir="$optval"
  ;;
  --sysconfdir=*) sysconfdir="$optval"
  ;;
  --libdir=*) libdir="$optval"; force_libdir=yes
  ;;
  --includedir=*) includedir="$optval"
  ;;
  --mandir=*) mandir="$optval"
  ;;
  --disable-debug) debug="no"
  ;;
  --disable-strip) dostrip="no"
  ;;
  --disable-optimize) optimize="no"
  ;;
  --cross-prefix=*) cross_prefix="$optval"
  ;;
  --cross-compile) cross_compile="yes"
  ;;
  --with-sdl-prefix=*) sdlprefix="$optval";
  ;;
  --with-curl-prefix=*) curlprefix="$optval";
  ;;
  --with-libplayer-dir=*) libplayerdir="$optval";
  ;;
  --help) show_help
  ;;
  *)
  echo "Unknown option \"$opt\"."
  echo "See $0 --help for available options."
  exit 1
  ;;
  esac
done

if [ -n "$cross_prefix" ]; then
  cross_compile="yes"
  cc="${cross_prefix}${cc}"
  ar="${cross_prefix}${ar}"
  ranlib="${cross_prefix}${ranlib}"
  strip="${cross_prefix}${strip}"
else
  [ -n "$CC" ] && cc="$CC"
  [ -n "$AR" ] && ar="$AR"
  [ -n "$RANLIB" ] && ranlib="$RANLIB"
  [ -n "$STRIP" ] && strip="$STRIP"
fi
[ -n "$MAKE" ] && make="$MAKE"

#################################################
#   create logging file
#################################################
if test "$logging" != no; then
  enabled logging || logfile="$logging"
  echo "# $0 $@" >$logfile
  set >>$logfile
else
  logfile=/dev/null
fi

#################################################
#   compiler sanity check
#################################################
echolog "Checking for compiler available ..."
check_exec <<EOF
int main(){
    return 0;
}
EOF
if test "$?" != 0; then
  echo "$cc is unable to create an executable file."
  if test -z "$cross_prefix" -a "$cross_compile" = no; then
    echo "If $cc is a cross-compiler, use the --cross-compile option."
  fi
  die "C compiler test failed."
fi


#################################################
#   check for target specific flags
#################################################
# check for SIMD availability

# AltiVec flags: The FSF version of GCC differs from the Apple version
if test $cpu = "powerpc"; then
  if test $altivec = "yes"; then
    if test -n "`$cc -v 2>&1 | grep version | grep Apple`"; then
      add_cflags "-faltivec"
    else
      add_cflags "-maltivec -mabi=altivec"
    fi
  fi
fi

check_header altivec.h && _altivec_h=yes || _altivec_h=no

# check if our compiler supports Motorola AltiVec C API
if enabled altivec; then
  if enabled _altivec_h; then
    inc_altivec_h="#include <altivec.h>"
  else
    inc_altivec_h=
  fi
  check_cc <<EOF || altivec=no
$inc_altivec_h
int main(void) {
    vector signed int v1, v2, v3;
    v1 = vec_add(v2,v3);
    return 0;
}
EOF
fi

# mmi only available on mips
if [ "$mmi" = "default" ]; then
  if [ "$cpu" = "mips" ]; then
    mmi="yes"
  else
    mmi="no"
  fi
fi

# check if our compiler supports mmi
enabled mmi && check_cc <<EOF || mmi="no"
int main(void) {
    __asm__ ("lq \$2, 0(\$2)");
    return 0;
}
EOF

# test gcc version to see if vector builtins can be used
# currently only used on i386 for MMX builtins
check_cc -msse <<EOF && builtin_vector=yes || builtin_vector=no
#include <xmmintrin.h>
int main(void) {
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
return 0;
#else
#error no vector builtins
#endif
}
EOF

# test for mm3dnow.h
test "$cpu" = "x86_64" && march=k8 || march=athlon
check_cc -march=$march <<EOF && mm3dnow=yes || mm3dnow=no
#include <mm3dnow.h>
int main(void) {
__m64 b1;
b1 = _m_pswapd(b1);
_m_femms();
return 0;
}
EOF

# ---
# big/little-endian test
if test "$cross_compile" = "no"; then
  check_ld <<EOF || die "endian test failed" && $TMPE && bigendian="yes"
#include <inttypes.h>
int main(int argc, char ** argv){
        volatile uint32_t i=0x01234567;
        return (*((uint8_t*)(&i))) == 0x67;
}
EOF
else
# programs cannot be launched if cross compiling, so make a static guess
  if test "$cpu" = "powerpc" -o "$cpu" = "mips" ; then
    bigendian="yes"
  fi
fi

#################################################
#   check for libplayer
#################################################
#echolog "Checking for libplayer ..."
#if [ -n "$libplayerdir" ]; then
#  check_cflags -I$libplayerdir
#  check_ldflags -L$libplayerdir
#fi
#check_lib player.h player_init -lplayer || die "Error, can't find libplayer !"

#################################################
#   check for SDL
#################################################
echolog "Checking for libsdl ..."
sdlconfig="/usr/bin/sdl-config"
[ -n "$sdlprefix" ] && sdlconfig="$sdlprefix/bin/sdl-config"
check_libconfig $sdlconfig SDL_Init ||
{
  if [ -n "$sdlprefix" ]; then
    check_cflags -I$sdlprefix/include
    check_ldflags -L$sdlprefix/lib
  fi
  check_lib SDL.h SDL_Init -lSDL;
} || die "Error, can't find libsdl !"

#################################################
#   check for SDL_image
#################################################
echolog "Checking for libsdl_image ..."
{
  if [ -n "$sdlprefix" ]; then
    check_cflags -I$sdlprefix/include
    check_ldflags -L$sdlprefix/lib
  fi
  check_lib SDL_image.h IMG_Load -lSDL_image;
} || die "Error, can't find libsdl_image !"

#################################################
#   check for SDL_gfx
#################################################
echolog "Checking for libsdl_gfx ..."
{
  if [ -n "$sdlprefix" ]; then
    check_cflags -I$sdlprefix/include
    check_ldflags -L$sdlprefix/lib
  fi
  check_lib SDL_rotozoom.h zoomSurface -lSDL_gfx;
} || die "Error, can't find libsdl_gfx !"


#################################################
#   check for SDL_ttf
#################################################
echolog "Checking for libsdl_ttf ..."
{
  if [ -n "$sdlprefix" ]; then
    check_cflags -I$sdlprefix/include
    check_ldflags -L$sdlprefix/lib
  fi
  check_lib SDL_ttf.h TTF_OpenFont -lSDL_ttf;
} || die "Error, can't find libsdl_ttf !"

#################################################
#   check for libcurl
#################################################
#echolog "Checking for libcurl ..."
#curlconfig="/usr/bin/curl-config"
#[ -n "$curlprefix" ] && curlconfig="$curlprefix/bin/curl-config"
#check_libconfig $curlconfig curl_version ||
#{
#  if [ -n "$curlprefix" ]; then
#    check_cflags -I$curlprefix/include
#    check_ldflags -L$curlprefix/lib
#  fi
#  check_lib curl/curl.h curl_version -lcurl;
#} || die "Error, can't find libcurl !"

#################################################
#   checking for libpthread
#################################################
echolog "Checking for libpthread ..."
check_lib pthread.h pthread_create -lpthread ||
check_func pthread_create ||
die "Error, can't find libpthread"

enabled debug && add_cflags -g3

# add some useful compiler flags if supported
check_cflags -Wall
#check_cflags -W
check_cflags -D_LARGEFILE_SOURCE
check_cflags -D_FILE_OFFSET_BITS=64
check_cflags -D_REENTRANT

if enabled optimize; then
  if test -n "`$cc -v 2>&1 | grep xlc`"; then
    add_cflags  "-O5"
    add_ldflags "-O5"
  else
    add_cflags "-O3"
  fi
fi

#################################################
#   logging result
#################################################
echolog ""
echolog "omc: configure is OK"
echolog "configuration:"
echolog "  install prefix     $PREFIX"
echolog "  C compiler         $cc"
echolog "  AR                 $ar"
echolog "  RANLIB             $ranlib"
echolog "  STRIP              $strip"
echolog "  make               $make"
echolog "  CPU                $cpu ($tune)"
echolog "  debug symbols      $debug"
echolog "  strip symbols      $dostrip"
echolog "  optimize           $optimize"
echolog ""
echolog "  CFLAGS             $CFLAGS"
echolog "  LDFLAGS            $LDFLAGS"
echolog "  extralibs          $extralibs"
echolog ""

#################################################
#   save configs attributes
#################################################
echolog "Creating config.mak and config.h..."

echo "# Automatically generated by configure - do not modify!" > $CONFIGFILE
echo "/* Automatically generated by configure - do not modify! */" > $TMPH

append_config "PREFIX=$PREFIX"
append_config "prefix=\$(DESTDIR)\$(PREFIX)"
append_config "bindir=\$(DESTDIR)$bindir"
append_config "datadir=\$(DESTDIR)$datadir"
append_config "sysconfdir=\$(DESTDIR)$sysconfdir"
append_config "libdir=\$(DESTDIR)$libdir"
append_config "includedir=\$(DESTDIR)$includedir"
append_config "mandir=\$(DESTDIR)$mandir"

append_config "MAKE=$make"
append_config "CC=$cc"
append_config "AR=$ar"
append_config "RANLIB=$ranlib"
if enabled dostrip; then
  append_config "STRIP=$strip"
  append_config "INSTALLSTRIP=$installstrip"
else
  append_config "STRIP=echo ignoring strip"
  append_config "INSTALLSTRIP="
fi
append_config "EXTRALIBS=$extralibs"

append_config "OPTFLAGS=$CFLAGS"
append_config "LDFLAGS=$LDFLAGS"
append_config "INSTALL=$INSTALL"


eval CFG_DIR="$sysconfdir/omc"
append_header "#define CFG_DIR \"$CFG_DIR\""
append_config "CFG_DIR=\$(sysconfdir)/omc"

eval DATA_DIR="$datadir/omc"
append_header "#define DATA_DIR \"$DATA_DIR\""
append_config "DATA_DIR=\$(datadir)/omc"


#################################################
#   save config.h file
#################################################
# Do not overwrite config.h if unchanged to avoid superfluous rebuilds.
diff $TMPH config.h >/dev/null 2>&1
if test "$?" != "0" ; then
  mv -f $TMPH config.h
else
  echolog "config.h is unchanged"
fi

clean
exit 0