#!/bin/sh

#set -x

TF_C=testit.c
TF_E=./testit
CC=cc

CCTF="$CC -o $TF_E $TF_C"

test_lib () {
 echo > $TF_C

 echo -n "checking for $1... "
 shift;

 LIBS=''

 while [ "$1" != '--' ]
 do
  LIBS="$LIBS -l$1"
  shift;
 done

 shift;

 while [ "$1" != '' ]
 do
  echo "#include <$1>" >> $TF_C
  shift;
 done

 echo 'int main (void) { return 0; }' >> $TF_C

 $CCTF $LIBS 2> /dev/null;

 R=$?

 if [ "$R" = '0' ]
 then
  echo 'yes'
 else
  echo 'no'
 fi

 return $R
}

test_lib_defmake () {
 def="$1"
 subdir="$2"
 shift
 shift
 lib="$2"

 [ "$subdir" = '%' ] && subdir=''

 if test_lib $@
 then
  echo "#define $def"            >&3
  [ "$subdir" != '' ] && \
   echo "subdir_$subdir=$subdir" >&4
  echo "lib_$lib=-l$lib" >&4
 else
  [ "$subdir" != '' ] && \
   echo "subdir_$subdir=" >&4
  echo "lib_$lib=" >&4
 fi
}

exec 3> config.h 4> Makefile.conf

cat >&3 << EOF
//config.h:

#ifndef _ROARAUDIO_CONFIG_H_
#define _ROARAUDIO_CONFIG_H_

EOF

{
 echo '/* uname: ' $(uname -a) '*/'
 echo '/* Date : ' $(date)  '*/'
 echo
} >&3

test_lib 'Math Library' m          -- math.h                         && echo '#define ROAR_HAVE_LIBM' >&3
if test_lib 'realtime Library' rt -- sys/mman.h mqueue.h semaphore.h
then
 {
  echo '#define ROAR_HAVE_LIBRT'
  echo '#define ROAR_NEED_LIBRT'
 } >&3
fi

echo >&3

test_lib_defmake ROAR_HAVE_ESD           libroaresd   EsounD         esd        -- esd.h
test_lib_defmake ROAR_HAVE_LIBAO         %            libao          ao         -- ao/ao.h ao/plugin.h
test_lib_defmake ROAR_HAVE_LIBVORBIS     %            libvorbis      vorbis     -- vorbis/codec.h
test_lib_defmake ROAR_HAVE_LIBVORBISFILE %           libvorbisfile  vorbisfile -- vorbis/vorbisfile.h
test_lib_defmake ROAR_HAVE_LIBSPEEX      %            libspeex       speex      -- speex/speex.h speex/speex_stereo.h
test_lib_defmake ROAR_HAVE_LIBCELT       %            libcelt        celt       -- celt/celt.h celt/celt_header.h
test_lib_defmake ROAR_HAVE_LIBOGGZ       %            liboggz        oggz       -- oggz/oggz.h
test_lib_defmake ROAR_HAVE_LIBSNDFILE    %            libsndfile     sndfile    -- sndfile.h
test_lib_defmake ROAR_HAVE_LIBFISHSOUND  roarfish     libfishsound   fishsound  -- fishsound/fishsound.h
test_lib_defmake ROAR_HAVE_LIBPULSE      libroarpulse libpulse       pulse      -- pulse/pulseaudio.h pulse/simple.h
test_lib_defmake ROAR_HAVE_LIBY2         libroaryiff  libyiff        Y2         -- Y2/Y.h Y2/Ylib.h

# add a better test here
test_lib 'linux sendfile()'       -- sys/sendfile.h && echo '#define ROAR_HAVE_LINUX_SENDFILE' >&3


echo -n 'checking for mlock()... '

echo '#include <sys/mman.h>' > $TF_C
echo 'int main (void) { mlock((void*)0, 0); return 0; }' >> $TF_C

if $CCTF 2> /dev/null;
then
 echo '#define ROAR_HAVE_MLOCK' >&3
 echo yes
else
 echo no
fi

echo -n 'checking for safe 32 bit integer overflow... '

cat > $TF_C << EOF
#include <stdio.h>
#include <stdint.h>
#define TYPE uint32_t
#define MAX  ((TYPE)4294967295U)

int main (void) {
 TYPE a = MAX;

 a += 2;

 if ( a == 1 ) {
  printf("#define ROAR_HAVE_SAFE_OVERFLOW\n");
  return 0;
 }

 return 1;
}
EOF

if $CCTF 2> /dev/null;
then
 $TF_E >&3
 if [ "$?" = '0' ]
 then
  echo yes
 else
  echo no
 fi
else
 echo 'no (can not compile!, no stdint.h?)'
fi

cat >&3 << EOF

#endif

//ll
EOF

rm -f $TF_C $TF_E

mv config.h include/roaraudio/
echo 'config.h created and moved into include/roaraudio/'

#ll