ENABLE_STATIC_LIB=0
ENABLE_SHARED_LIB=1

TARGET_PREFIX=$DESTDIR/usr
TARGET_CONF_PATH=$DESTDIR/etc

LIB_VERSION=lib64
DEBUG_FLAG=0

if [ -f /usr/include/fastcommon/_os_define.h ]; then
  OS_BITS=$(grep -F OS_BITS /usr/include/fastcommon/_os_define.h | awk '{print $NF;}')
  USE_URING=$(grep -F IOEVENT_USE_URING /usr/include/fastcommon/_os_define.h | awk '{print $NF;}')
elif [ -f /usr/local/include/fastcommon/_os_define.h ]; then
  OS_BITS=$(grep -F OS_BITS /usr/local/include/fastcommon/_os_define.h | awk '{print $NF;}')
  USE_URING=$(grep -F IOEVENT_USE_URING /usr/local/include/fastcommon/_os_define.h | awk '{print $NF;}')
else
  OS_BITS=64
  USE_URING=''
fi

uname=$(uname)
if [ "$OS_BITS" -eq 64 ]; then
  if [ $uname = 'Linux' ]; then
    osname=$(cat /etc/os-release | grep -w NAME | awk -F '=' '{print $2;}' | \
            awk -F '"' '{if (NF==3) {print $2} else {print $1}}' | awk '{print $1}')
    if [ $osname = 'Ubuntu' -o $osname = 'Debian' ]; then
      LIB_VERSION=lib
    else
      LIB_VERSION=lib64
    fi
  else
    LIB_VERSION=lib
  fi
else
  LIB_VERSION=lib
fi

export CC=gcc
CFLAGS='-Wall'
GCC_VERSION=$(gcc -dM -E -  < /dev/null | grep -w __GNUC__ | awk '{print $NF;}')
if [ -n "$GCC_VERSION" ] && [ $GCC_VERSION -ge 7 ]; then
  CFLAGS="$CFLAGS -Wformat-truncation=0 -Wformat-overflow=0"
fi
CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE"
if [ "$DEBUG_FLAG" = "1" ]; then
  CFLAGS="$CFLAGS -g -O1 -DDEBUG_FLAG"
else
  CFLAGS="$CFLAGS -g -O3"
fi

LIBS=''
uname=$(uname)
if [ "$uname" = "Linux" ]; then
  CFLAGS="$CFLAGS"
  if [ -n "$USE_URING" ]; then
    LIBS="$LIBS -luring"
  fi
elif [ "$uname" = "FreeBSD" ] || [ "$uname" = "Darwin" ]; then
  CFLAGS="$CFLAGS"
  if [ "$uname" = "Darwin" ]; then
    TARGET_PREFIX=$TARGET_PREFIX/local
    LIB_VERSION=lib
  fi

elif [ "$uname" = "SunOS" ]; then
  CFLAGS="$CFLAGS -D_THREAD_SAFE"
  LIBS="$LIBS -lsocket -lnsl -lresolv"
elif [ "$uname" = "AIX" ]; then
  CFLAGS="$CFLAGS -D_THREAD_SAFE"
elif [ "$uname" = "HP-UX" ]; then
  CFLAGS="$CFLAGS"
fi

have_pthread=0
if [ -f /usr/lib/libpthread.so ] || [ -f /usr/local/lib/libpthread.so ] || [ -f /lib64/libpthread.so ] || [ -f /usr/lib64/libpthread.so ] || [ -f /usr/lib/libpthread.a ] || [ -f /usr/local/lib/libpthread.a ] || [ -f /lib64/libpthread.a ] || [ -f /usr/lib64/libpthread.a ]; then
  LIBS="$LIBS -lpthread"
  have_pthread=1
elif [ "$uname" = "HP-UX" ]; then
  lib_path="/usr/lib/hpux$OS_BITS"
  if [ -f $lib_path/libpthread.so ]; then
    LIBS="-L$lib_path -lpthread"
    have_pthread=1
  fi
elif [ "$uname" = "FreeBSD" ]; then
  if [ -f /usr/lib/libc_r.so ]; then
    line=$(nm -D /usr/lib/libc_r.so | grep -F pthread_create | grep -w T)
    if [ $? -eq 0 ]; then
      LIBS="$LIBS -lc_r"
      have_pthread=1
    fi
  elif [ -f /lib64/libc_r.so ]; then
    line=$(nm -D /lib64/libc_r.so | grep -F pthread_create | grep -w T)
    if [ $? -eq 0 ]; then
      LIBS="$LIBS -lc_r"
      have_pthread=1
    fi
  elif [ -f /usr/lib64/libc_r.so ]; then
    line=$(nm -D /usr/lib64/libc_r.so | grep -F pthread_create | grep -w T)
    if [ $? -eq 0 ]; then
      LIBS="$LIBS -lc_r"
      have_pthread=1
    fi
  fi
fi

if [ $have_pthread -eq 0 ] && [ "$uname" = "Linux" ]; then
   /sbin/ldconfig -p | grep -w libpthread.so > /dev/null
   if [ $? -eq 0 ]; then
      LIBS="$LIBS -lpthread"
   else
      echo -E 'Require pthread lib, please check!'
      exit 2
   fi
fi

if [ "$DEBUG_FLAG" = "1" ]; then
  if [ "$uname" = "Linux" ]; then
    LIBS="$LIBS -ldl -rdynamic"
  fi
fi

sed_replace()
{
    sed_cmd=$1
    filename=$2
    if [ "$uname" = "FreeBSD" ] || [ "$uname" = "Darwin" ]; then
       sed -i "" "$sed_cmd" $filename
    else
       sed -i "$sed_cmd" $filename
    fi
}

cd src/include
link=$(readlink sf)
if [ $? -ne 0 ] || [ "$link" != '..' -a "$link" != '../' ]; then
  ln -sf .. sf
fi

cd ..
cp Makefile.in Makefile
sed_replace "s#\\\$(CC)#gcc#g" Makefile
sed_replace "s#\\\$(CFLAGS)#$CFLAGS#g" Makefile
sed_replace "s#\\\$(LIBS)#$LIBS#g" Makefile
sed_replace "s#\\\$(TARGET_PREFIX)#$TARGET_PREFIX#g" Makefile
sed_replace "s#\\\$(ENABLE_STATIC_LIB)#$ENABLE_STATIC_LIB#g" Makefile
sed_replace "s#\\\$(ENABLE_SHARED_LIB)#$ENABLE_SHARED_LIB#g" Makefile
sed_replace "s#\\\$(LIB_VERSION)#$LIB_VERSION#g" Makefile
make $1 $2 $3

if [ "$1" = "clean" ]; then
  /bin/rm -f Makefile
fi