#!/bin/bash
# configure reset  - resets probed config
# configure static - build all builtin static libraries
# configure shared - build only static libraries needed

#edit global_config and set HAVE_var to override probe

PROBED="STATIC_LIBRARIES HAVE_VIDEO4LINUX2 HAVE_DVB HAVE_GL"
PROBED="$PROBED HAVE_DL HAVE_NUMA"

if [ $# -gt 0 ]; then
  if [ "$1" = "reset" ]; then
     for v in $PROBED; do
       sed -e "s/^$v := .*/#$v := y/" -i global_config
     done
     echo "configuration reset"
     exit 0;
  fi
  if [ "$1" = "static" ]; then
    STATIC_LIBRARIES=y
  elif [ "$1" = "shared" ]; then
    STATIC_LIBRARIES=n
  else
    echo usage: "./configure <shared | static>"
    exit 1
  fi
fi

if [ -z "$STATIC_LIBRARIES" ]; then
STATIC_LIBRARIES=y
fi

for v in $PROBED; do
  vv=`grep "^$v := .*"  global_config`
  if [ $? = 0 ]; then
    echo "config probe override: $vv"
  fi
done

# test for nasm
OBJDIR=`uname -m`
TOPDIR=`pwd`

if [ $OBJDIR = i686 ]; then
  if [ ! -x /usr/bin/nasm -a ! -x /usr/local/bin/nasm ]; then
    echo " *** Nasm is required."; 
    exit 1
  fi

fi

if [ ! -x /usr/bin/yasm -a ! -x /usr/local/bin/yasm ]; then
  echo " *** Yasm is required."; 
  exit 1
fi


# test for videodev2.h

rm -f a.out
cat > conftest.c << EOF
#include <asm/types.h>
#include <sys/time.h>
#include <linux/videodev2.h>
int main()
{
  return 0;
}
EOF

gcc conftest.c > /dev/null 2>&1

if [ -x a.out ]; then HAVE_VIDEO4LINUX2=y; else HAVE_VIDEO4LINUX2=n; fi


# test for dvb

rm -f a.out
cat > conftest.c << EOF
#include <time.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
int main()
{
  return 0;
}
EOF

gcc conftest.c > /dev/null 2>&1

if [ -x a.out ]; then HAVE_DVB=y; else HAVE_DVB=n; fi

rm -f a.out conftest.c


# test for -msse support

rm -f a.out
cat > conftest.c << EOF
int main()
{
  return 0;
}
EOF

gcc -msse conftest.c > /dev/null 2>&1

if [ -x a.out ]; then HAVE_GCC=y; else HAVE_GCC=n; fi

rm -f a.out conftest.c

if [ $HAVE_GCC = n ]; then
  echo " *** GCC 3.2.2 or greater is required.  Download it from gcc.gnu.org"; 
  exit 1
fi


# test for OpenGL 2.0

rm -f a.out
cat > conftest.c << EOF
#include <GL/gl.h>
#include <GL/glext.h>
#include <GL/glu.h>
int main()
{
  glUseProgram(0);
  return 0;
}
EOF

gcc conftest.c -lGL -lGLU > /dev/null 2>&1

if [ -x a.out ]; then HAVE_GL=y; else HAVE_GL=n; fi

rm -f a.out conftest.c


# test for libdl

rm -f a.out
cat > conftest.c << EOF
int main()
{
  return 0;
}
EOF

gcc conftest.c -ldl > /dev/null 2>&1

if [ -x a.out ]; then HAVE_DL=y; else HAVE_DL=n; fi

rm -f a.out conftest.c


# test for libnuma

rm -f a.out
cat > conftest.c << EOF
int main()
{
  return 0;
}
EOF

gcc conftest.c -lnuma > /dev/null 2>&1

if [ -x a.out ]; then HAVE_NUMA=y; else HAVE_NUMA=n; fi

rm -f a.out conftest.c


# update global_config with probe data

for v in $PROBED; do
  sed -e "s/^#$v := .*/$v := ${!v}/" -i global_config
done

# configure thirdparty build

cd thirdparty
case "$STATIC_LIBRARIES" in
 "y") ./configure static ;;
 "n") ./configure shared ;;
 *) echo "configuration failed"; exit 1;;
esac
if [ $? -ne 0 ]; then
  echo "Error in thirdparty configuration."
  exit 1
fi
cd ..

# configure libzmpeg3 build

echo CONFIGURING LIBZMPEG3
cd libzmpeg3* && ./configure && cd ..
if [ $? -ne 0 ]; then
  echo "Error in libzmpeg3 configuration."
  exit 1
fi

# success

echo "Configured successfully."
echo "Type 'make' to build me."
echo "If all ok, 'make install'";