#!/bin/sh
# Just a simple handwritten configure

host=''
prefix=''
args="$@"
while [ "$#" -gt 0 ]; do
  case "$1" in
  --host=*) host="`echo "$1" | sed -e 's/--host=//'`";;
  --prefix=*) prefix="`echo "$1" | sed -e 's/--prefix=//'`";;
  *)
    echo 'Available options:'
    echo '--host=...    = Specify the host triplet to build for'
    echo '--prefix=...  = Specify the prefix to install to'
    exit;;
  esac
  shift
done
rm -f config.mk
true > config.h
echo "# Generated with: $0 $args" > config.mk
if [ -n "$prefix" ]; then echo "PREFIX=${prefix}" >> config.mk; fi

printf 'Checking for a C compiler... '
if [ "x$CC" = "x" -a "x$host" != "x" ]; then
  if which "${host}-gcc" > /dev/null 2> /dev/null; then CC="${host}-gcc"
  elif which "${host}-clang" > /dev/null 2> /dev/null; then CC="${host}-clang"
  elif which "${host}-cc" > /dev/null 2> /dev/null; then CC="${host}-cc"
  fi
fi
if [ "x$CC" = "x" ]; then
  if which gcc > /dev/null 2> /dev/null; then CC=gcc
  elif which clang > /dev/null 2> /dev/null; then CC=clang
  elif which cc > /dev/null 2> /dev/null; then CC=cc
  fi
fi
if [ "x$CC" = "x" ]; then echo "None found"; exit 1; fi
echo "$CC"
echo "CC=$CC" >> config.mk

printf 'Checking if we need -liconv for iconv... '
echo '#include <iconv.h>' > iconvtest.c
echo 'int main(){iconv_t x=iconv_open("a","b");return 0;}' >> iconvtest.c
if ! "$CC" iconvtest.c -o iconvtest > /dev/null 2> /dev/null; then
  echo 'LIBS+=-liconv' >> config.mk
  echo yes
else
  echo no
fi
rm -f iconvtest iconvtest.c

testbuild()
{
  printf "Checking for ${1}... "
  code="$2"
  headers="$3"
  libs="$4"
  rm -f apitest.c
  for x in ${headers}; do
    echo "#include <${x}>" >> apitest.c
  done
  echo "int main(){${code}}" >> apitest.c
  if "$CC" apitest.c ${libs} -o apitest > /dev/null 2> /dev/null; then
    echo yes
    rm -f apitest.c apitest
    return 0
  else
    echo no
    rm -f apitest.c
    return 1
  fi
}

testpkgconfig()
{
  pkgname="$1"
  varprefix="$2"
  printf "Checking for ${pkgname}... "
  testlibs="`pkg-config --libs "$pkgname" 2> /dev/null`"
  if [ "x$testlibs" != "x" ]; then
    echo "${varprefix}_LIBS=${testlibs}" >> config.mk
    echo "${varprefix}_CFLAGS=`pkg-config --cflags "$pkgname"`" >> config.mk
    echo "HAVE_${varprefix}=1" >> config.mk
    echo yes
    return 0
  else
    echo no
    return 1
  fi
}

if ! testbuild 'strndup' 'char* x=strndup("abc", 2);' 'string.h'; then
  echo '#define NO_STRNDUP 1' >> config.h
fi

if ! testbuild 'dprintf' 'dprintf(1,"test");' 'stdio.h'; then
  echo '#define NO_DPRINTF 1' >> config.h
fi

if ! uname -s | grep -q MSYS; then # Skip all the GUI stuff when building on msys

if ! testpkgconfig 'gtk+-3.0' GTK; then
  testpkgconfig 'gtk+-2.0' GTK
fi

printf 'Checking for libavcodec... '
avcodeclibs="`pkg-config --libs libavcodec 2> /dev/null`"
if [ "x$avcodeclibs" != "x" ]; then
  echo yes
  avcodecflags="${avcodeclibs} `pkg-config --cflags libavcodec`"
  # AV_CODEC_ID_FLV1
  if ! testbuild 'AV_CODEC_ID_FLV1' 'int x=AV_CODEC_ID_FLV1;' 'libavcodec/avcodec.h' "$avcodecflags"; then
    if testbuild 'CODEC_ID_FLV1' 'int x=CODEC_ID_FLV1;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#define AV_CODEC_ID_FLV1 CODEC_ID_FLV1' >> config.h
      echo '#define AV_CODEC_ID_NELLYMOSER CODEC_ID_NELLYMOSER' >> config.h
    else avcodeclibs=''; fi
  fi
  # av_packet_unref
  if ! testbuild 'av_packet_unref' 'void* x=av_packet_unref;' 'libavcodec/avcodec.h' "$avcodecflags"; then
    if testbuild 'av_free_packet' 'void* x=av_free_packet;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#define av_packet_unref av_free_packet' >> config.h
    else avcodeclibs=''; fi
  fi
  if [ "x$avcodeclibs" != "x" ]; then
    echo "AVCODEC_LIBS=${avcodeclibs}" >> config.mk
    echo "AVCODEC_CFLAGS=`pkg-config --cflags libavcodec`" >> config.mk
    if ! testbuild 'avcodec_free_context' 'void* x=avcodec_free_context;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#include <libavutil/mem.h>' >> config.h
      echo '#define avcodec_free_context(x) \' >> config.h
      echo '{ \' >> config.h
      echo '  avcodec_close(*x); \' >> config.h
      echo '  av_freep(&(*x)->extradata); \' >> config.h
      echo '  av_freep(&(*x)->subtitle_header); \' >> config.h
      echo '  av_freep(x); \' >> config.h
      echo '}' >> config.h
    fi
    if testbuild 'buf in AVPacket' 'AVPacket x; x.buf=0;' 'libavcodec/avcodec.h' "$avcodecflags"; then echo '#define AVPACKET_HAS_BUF 1' >> config.h; fi
    if ! testbuild 'avcodec_send_packet and avcodec_receive_frame' 'void* x=avcodec_send_packet; x=avcodec_receive_frame;' 'libavcodec/avcodec.h' "$avcodecflags"; then echo '#define AVCODEC_NO_SEND_RECEIVE_API 1' >> config.h; fi
  fi
else
  echo no
fi

testpkgconfig libswscale SWSCALE
if testpkgconfig libavformat AVFORMAT && ! testbuild 'avcodec_parameters_to_context' 'void* x=avcodec_parameters_to_context;' 'libavcodec/avcodec.h' "$avcodecflags"; then
  echo '#define codecpar codec' >> config.h
  echo '#define avcodec_parameters_to_context(a, b) avcodec_free_context(&a); a=b' >> config.h
fi

printf 'Checking for libavutil... '
avutillibs="`pkg-config --libs libavutil 2> /dev/null`"
if [ "x$avutillibs" != "x" ]; then
  echo yes
  avutilflags="${avutillibs} `pkg-config --cflags libavutil`"
  # AV_PIX_FMT_RGB24 and AV_PIX_FMT_YUV420P
  if ! testbuild 'AV_PIX_FMT_RGB24 and AV_PIX_FMT_YUV420P' 'int x=AV_PIX_FMT_RGB24; x=AV_PIX_FMT_YUV420P;' 'libavutil/pixfmt.h' "$avutilflags"; then
    if testbuild 'PIX_FMT_RGB24 and PIX_FMT_YUV420P' 'int x=PIX_FMT_RGB24; x=PIX_FMT_YUV420P;' 'libavutil/pixfmt.h' "$avutilflags"; then
      echo '#define AV_PIX_FMT_RGB24 PIX_FMT_RGB24' >> config.h
      echo '#define AV_PIX_FMT_YUV420P PIX_FMT_YUV420P' >> config.h
    else avutillibs=''; fi
  fi
  # av_frame_alloc
  if ! testbuild 'av_frame_alloc' 'void* x=av_frame_alloc;' 'libavutil/frame.h' "$avutilflags"; then
    if testbuild 'avcodec_alloc_frame' 'void* x=avcodec_alloc_frame;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#define av_frame_alloc avcodec_alloc_frame' >> config.h
    else avutillibs=''; fi
  fi
  # av_frame_free
  if ! testbuild 'av_frame_free' 'void* x=av_frame_free;' 'libavutil/frame.h' "$avutilflags"; then
    if testbuild 'avcodec_free_frame' 'void* x=avcodec_free_frame;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#define av_frame_free avcodec_free_frame' >> config.h
    elif testbuild 'av_free' 'void* x=av_free;' 'libavutil/frame.h' "$avutilflags"; then
      echo '#define av_frame_free av_free' >> config.h
    else avutillibs=''; fi
  fi
  # av_image_get_buffer_size
  if ! testbuild 'av_image_get_buffer_size' 'void* x=av_image_get_buffer_size;' 'libavutil/imgutils.h' "$avutilflags"; then
    if testbuild 'avpicture_get_size' 'void* x=avpicture_get_size;' 'libavcodec/avcodec.h' "$avcodecflags"; then
      echo '#define av_image_get_buffer_size(a,b,c,d) avpicture_get_size(a,b,c)' >> config.h
    else avutillibs=''; fi
  fi
  if [ "x$avutillibs" != "x" ]; then
    echo "AVUTIL_LIBS=${avutillibs}" >> config.mk
    echo "AVUTIL_CFLAGS=`pkg-config --cflags libavutil`" >> config.mk
  fi
else
  echo no
fi

haveresample=false
printf 'Checking for libavresample... '
avresamplelibs="`pkg-config --libs libavresample 2> /dev/null`"
if [ "x$avresamplelibs" != "x" ]; then
  echo "AVRESAMPLE_LIBS=${avresamplelibs}" >> config.mk
  echo "AVRESAMPLE_CFLAGS=`pkg-config --cflags libavresample`" >> config.mk
  echo yes
  haveresample=true
else
  echo no
  printf 'Checking for libswresample... '
  swresamplelibs="`pkg-config --libs libswresample 2> /dev/null`"
  if [ "x$swresamplelibs" != "x" ]; then
    echo "SWRESAMPLE_LIBS=${swresamplelibs}" >> config.mk
    echo "SWRESAMPLE_CFLAGS=`pkg-config --cflags libswresample`" >> config.mk
    echo '#define avresample_convert swresample_convert' >> config.h
    echo '#define avresample_alloc_context swresample_alloc_context' >> config.h
    echo '#define avresample_open swresample_open' >> config.h
    echo '#define avresample_free swresample_free' >> config.h
    echo yes
    haveresample=true
  else
    echo no
  fi
fi

if "$haveresample"; then
  testpkgconfig ao AO
fi

testpkgconfig libv4l2 LIBV4L2
testpkgconfig x11 LIBX11
testpkgconfig libpulse-simple PULSE

fi # Skip all the GUI stuff when building on msys

printf 'Checking for ncurses... '
notfound=true
for version in 7 6 5 4; do
  ncurseslibs="`ncursesw${version}-config --libs 2> /dev/null || ncurses${version}-config --libs 2> /dev/null`"
  if [ "x$ncurseslibs" != "x" ]; then
    echo "CURSES_LIBS=${ncurseslibs}" >> config.mk
    echo "CURSES_CFLAGS=`ncursesw${version}-config --cflags 2> /dev/null || ncurses${version}-config --cflags 2> /dev/null`" >> config.mk
    echo yes
    notfound=false
    break
  fi
done
if "$notfound"; then
  echo no
fi

if testbuild 'readline' 'rl_initialize();rl_forward(1,27);return 0;' 'stdio.h readline/readline.h' '-lreadline'; then
  echo "READLINE_LIBS=-lreadline" >> config.mk
fi

if ! testbuild 'prctl' 'prctl(PR_SET_PDEATHSIG, SIGHUP);return 0;' 'sys/prctl.h signal.h'; then
  echo '#define NO_PRCTL 1' >> config.h
fi

if testpkgconfig glib-2.0 GLIB; then
  echo 'LIBS+=$(GLIB_LIBS)' >> config.mk
  echo 'CFLAGS+=$(GLIB_CFLAGS) -DHAVE_GLIB=1' >> config.mk
fi

testpkgconfig webkit2gtk-4.0 WEBKITGTK || \
testpkgconfig webkit2gtk-3.0 WEBKITGTK

printf 'Checking if we have a working poll()... '
echo '#include <poll.h>' > polltest.c
echo '#include <sys/socket.h>' >> polltest.c
echo '#include <netinet/in.h>' >> polltest.c
echo 'int main(){' >> polltest.c
echo 'int s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);' >> polltest.c
echo 'struct pollfd pfd[]={{.fd=0, .events=POLLIN, .revents=0}, {.fd=s, .events=POLLIN, .revents=0}};' >> polltest.c
echo 'int x=poll(pfd, 2, 100);' >> polltest.c
echo 'return x>-1 && (pfd[0].revents==POLLNVAL || pfd[1].revents==POLLNVAL);' >> polltest.c
echo '}' >> polltest.c
"$CC" polltest.c -o polltest > /dev/null 2> /dev/null
if ./polltest 2> /dev/null; then
  echo yes
else
  echo no
  echo '#define POLL_BROKEN_OR_MISSING 1' >> config.h
fi
rm -f polltest.c polltest

# TODO: handle crosscompiling better
printf 'Checking if endianness macros work... '
echo '#include <stdio.h>' > endiantest.c
echo 'int main(){' >> endiantest.c
echo '#if defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__) && defined(__BYTE_ORDER__)' >> endiantest.c
echo '  if(__ORDER_LITTLE_ENDIAN__==__ORDER_BIG_ENDIAN__){return 1;}' >> endiantest.c
echo '  if(__BYTE_ORDER__!=__ORDER_LITTLE_ENDIAN__ && __BYTE_ORDER__!=__ORDER_BIG_ENDIAN__){return 1;}' >> endiantest.c
echo '  return 0;' >> endiantest.c
echo '#else' >> endiantest.c
echo '  return 1;' >> endiantest.c
echo '#endif' >> endiantest.c
echo '}' >> endiantest.c
"$CC" endiantest.c -o endiantest > /dev/null 2> /dev/null
if ./endiantest 2> /dev/null; then
  echo yes
else
  echo no
  printf 'Checking endianness and writing our own macros... '
  echo '#include <stdio.h>' > endiantest.c
  echo 'int main(){int num=1;char* x=(char*)&num;if(x[0]){printf("CFLAGS+=-D__ORDER_LITTLE_ENDIAN__=1 -D__ORDER_BIG_ENDIAN__=2 -D__BYTE_ORDER__=1");}else{printf("CFLAGS+=-D__ORDER_LITTLE_ENDIAN__=1 -D__ORDER_BIG_ENDIAN__=2 -D__BYTE_ORDER__=2");}return 0;}' >> endiantest.c
  "$CC" endiantest.c -o endiantest > /dev/null 2> /dev/null
  ./endiantest >> config.mk
  echo >> config.mk
  echo done
fi
rm -f endiantest.c endiantest

srcdir="`dirname "$0"`"
if [ "." != "$srcdir" ]; then
  sed -e "/^camplaceholder\\.gif/{s| | ${srcdir}/|g;n;s|\t|\t${srcdir}/|;}" "${srcdir}/Makefile" > Makefile
  for dir in '' utilities/ utilities/camviewer/ utilities/cursedchat/ utilities/gtk/ utilities/irchack/ utilities/libcamera/ utilities/modbot/; do
    mkdir -p "$dir"
    echo "${dir}%.o: ${srcdir}/${dir}%.c" >> Makefile
    echo '	$(CC) $(CFLAGS) -c $< -o $@' >> Makefile
  done
  echo "utilities/libcamera/%.o: ${srcdir}/utilities/libcamera/%.cpp" >> Makefile
  echo '	$(CXX) $(CXXFLAGS) -c $< -o $@' >> Makefile
  echo "SRCDIR=${srcdir}/" >> config.mk
fi

echo Done
make confinfo