#!/bin/sh

CMAKE_KNOWN_C_COMPILERS="cc gcc xlc icc tcc"
CMAKE_KNOWN_CXX_COMPILERS="CC g++ c++ xlC icc como aCC"
CMAKE_KNOWN_MAKE_PROCESSORS="make gmake"

CMAKE_SOURCES="\
  cmake  \
  cmakewizard  \
  cmakemain \
  cmMakeDepend \
  cmMakefile \
  cmDocumentation \
  cmGlobalGenerator \
  cmLocalGenerator \
  cmRegularExpression \
  cmSourceFile \
  cmSystemTools \
  cmDirectory \
  cmGlobalUnixMakefileGenerator \
  cmLocalUnixMakefileGenerator \
  cmCommands \
  cmTarget \
  cmCustomCommand \
  cmCacheManager \
  cmListFileCache \
  cmVariableWatch \
  cmSourceGroup"

cmake_source_dir=`echo $0 | sed -n '/\//{s/\/[^\/]*$//;p;}'`
cmake_source_dir=`(cd "${cmake_source_dir}";pwd)`
cmake_binary_dir=`pwd`
cmake_bootstrap_dir="${cmake_binary_dir}/Bootstrap.cmk"

cmake_usage()
{
  cat<<EOF
Usage: $0 [options]
Options: [defaults in brackets after descriptions]
Configuration:
  --help                  print this message
  --verbose               display more information
Directory and file names:
  --prefix=PREFIX         install architecture-independent files in PREFIX
                          [/usr/local]
EOF
  exit 10
}

cmake_verbose=
cmake_prefix_dir="/usr/local"
for a in "$@"; do
  if echo $a | grep "^--prefix="; then
    cmake_prefix_dir=`echo $a | sed "s/^--prefix=//"`
  fi
  if echo $a | grep "^--help"; then
    cmake_usage
  fi
  if echo $a | grep "^--verbose"; then
    cmake_verbose=TRUE
  fi
done

if [ -n "${cmake_verbose}" ]; then
  echo "---------------------------------------------"
  echo "Source directory: ${cmake_source_dir}"
  echo "Binary directory: ${cmake_binary_dir}"
  echo "Prefix directory: ${cmake_prefix_dir}"
fi

echo "---------------------------------------------"

[ -d "${cmake_bootstrap_dir}" ] || mkdir "${cmake_bootstrap_dir}"
if [ ! -d "${cmake_bootstrap_dir}" ]; then
  echo "Cannot create directory ${cmake_bootstrap_dir} to bootstrap CMake."
  exit 5
fi
cd "${cmake_bootstrap_dir}"

rm -f "${cmake_bootstrap_dir}/cmake_bootstrap.log"
rm -f "${cmake_bootstrap_dir}/cmConfigure.h"

cmake_report ()
{
  FILE=$1
  shift
  echo "$*" >> ${FILE}
}

cmake_escape ()
{
  echo $1 | sed "s/ /\\\\ /g"
}

cmake_log ()
{
  echo "$*" >> cmake_bootstrap.log
}

cmake_tmp_file ()
{
  echo "cmake_bootstrap_$$.test"
}

cmake_try_run ()
{
  COMPILER=$1
  FLAGS=$2
  TESTFILE=$3
  if [ ! -f "${TESTFILE}" ]; then
    echo "Test file ${TESTFILE} missing. Please verify your CMake source tree."
    exit 4
  fi
  TMPFILE=`cmake_tmp_file`
  echo "Try: ${COMPILER}"
  "${COMPILER}" ${FLAGS} "${TESTFILE}" -o "${TMPFILE}"
  RES=$?
  if [ "${RES}" -ne "0" ]; then
    echo "${COMPILER} does not work";return 1
  fi
  if [ ! -f "${TMPFILE}" ] && [ ! -f "${TMPFILE}.exe" ]; then
    echo "${COMPILER} does not produce output"
    return 2
  fi
  ./${TMPFILE}
  RES=$?
  rm -f "${TMPFILE}"
  if [ "${RES}" -ne "0" ]; then
    echo "${COMPILER} produces strange executable"
    return 3
  fi
  echo "${COMPILER} works"
  return 0
}

cmake_try_make ()
{
  MAKE_PROC=$1
  echo "Try: ${MAKE_PROC}"
  ${MAKE_PROC}
  RES=$?
  if [ "${RES}" -ne "0" ]; then
    echo "${MAKE_PROC} does not work";return 1
  fi
  if [ ! -f "test" ] && [ ! -f "test.exe" ]; then
    echo "${COMPILER} does not produce output"
    return 2
  fi
  ./test
  RES=$?
  rm -f "test"
  if [ "${RES}" -ne "0" ]; then
    echo "${MAKE_PROC} produces strange executable"
    return 3
  fi
  echo "${MAKE_PROC} works"
  return 0
}

cmake_c_flags=${CFLAGS}
cmake_cxx_flags=${CXXFLAGS}

# Test C compiler
cmake_c_compiler=

if [ -n "${CC}" ]; then
  cmake_c_compilers="${CC}"
else
  cmake_c_compilers="${CMAKE_KNOWN_C_COMPILERS}"
fi

TMPFILE=`cmake_tmp_file`
cat>"${TMPFILE}.c"<<EOF
#include<stdio.h>
int main()
{
  printf("1\n");
  return 0;
}
EOF
for a in ${cmake_c_compilers}; do
  if [ -z "${cmake_c_compiler}" ] && cmake_try_run "${a}" "${cmake_c_flags}" "${TMPFILE}.c" >> cmake_bootstrap.log 2>&1; then
    cmake_c_compiler="${a}"
  fi
done
rm -f "${TMPFILE}.c"

if [ -z "${cmake_c_compiler}" ]; then
  echo "Cannot find apropriate C compiler on this system."
  echo "Please specify one using environment variable CC."
  exit 1
fi
echo "C compiler on this system is: ${cmake_c_compiler} ${cmake_c_flags}"

# Test CXX compiler
cmake_cxx_compiler=
if [ -n "${CXX}" ]; then
  cmake_cxx_compilers="${CXX}"
else
  cmake_cxx_compilers="${CMAKE_KNOWN_CXX_COMPILERS}"
fi

TMPFILE=`cmake_tmp_file`
cat>"${TMPFILE}.cxx"<<EOF
#include<iostream.h>
int main()
{
  cout << 1 << endl;
  return 0;
}
EOF
for a in ${cmake_cxx_compilers}; do
  if [ -z "${cmake_cxx_compiler}" ] && cmake_try_run "${a}" "${cmake_cxx_flags}" "${TMPFILE}.cxx" >> cmake_bootstrap.log 2>&1; then
    cmake_cxx_compiler="${a}"
  fi
done
rm -f "${TMPFILE}.cxx"



if [ -z "${cmake_cxx_compiler}" ]; then
  echo "Cannot find apropriate C++ compiler on this system."
  echo "Please specify one using environment variable CXX."
  exit 1
fi
echo "C++ compiler on this system is: ${cmake_cxx_compiler} ${cmake_cxx_flags}"

# Test Make

cmake_make_processor=
if [ -n "${MAKE}" ]; then
  cmake_make_processors="${MAKE}"
else
  cmake_make_processors="${CMAKE_KNOWN_MAKE_PROCESSORS}"
fi

TMPFILE="`cmake_tmp_file`_dir"
rm -rf "${cmake_bootstrap_dir}/${TMPFILE}"
mkdir "${cmake_bootstrap_dir}/${TMPFILE}"
cd "${cmake_bootstrap_dir}/${TMPFILE}"
cat>"Makefile"<<EOF
test: test.c
	${cmake_c_compiler} -o test test.c
EOF
cat>"test.c"<<EOF
#include <stdio.h>
int main(){ printf("1\n"); return 0; }
EOF
for a in ${cmake_make_processors}; do
  if [ -z "${cmake_make_processor}" ] && cmake_try_make "${a}" >> cmake_bootstrap.log 2>&1; then
    cmake_make_processor="${a}"
  fi
done
cd "${cmake_bootstrap_dir}"
rm -rf "${cmake_bootstrap_dir}/${TMPFILE}"

echo "Make processor on this system is: ${cmake_make_processor}"

# Test C++ compiler features
if cmake_try_run "${cmake_cxx_compiler}" "${cmake_cxx_flags}" "${cmake_source_dir}/Modules/TestForSTDNamespace.cxx" >> cmake_bootstrap.log 2>&1; then
  cmake_report cmConfigure.h "/* #undef CMAKE_NO_STD_NAMESPACE */"
  echo "${cmake_cxx_compiler} has STD namespace"
else
  cmake_report cmConfigure.h "#define CMAKE_NO_STD_NAMESPACE 1"
  echo "${cmake_cxx_compiler} does not have STD namespace"
fi

if cmake_try_run "${cmake_cxx_compiler}" "${cmake_cxx_flags}" "${cmake_source_dir}/Modules/TestForANSIStreamHeaders.cxx" >> cmake_bootstrap.log 2>&1; then
  cmake_report cmConfigure.h "/* #undef CMAKE_NO_ANSI_STREAM_HEADERS */"
  echo "${cmake_cxx_compiler} has ANSI stream headers"
else
  cmake_report cmConfigure.h "#define CMAKE_NO_ANSI_STREAM_HEADERS 1"
  echo "${cmake_cxx_compiler} does not have ANSI stream headers"
fi

TMPFILE=`cmake_tmp_file`
cat>${TMPFILE}.cxx<<EOF
#include <sstream>
int main() { return 0;}
EOF
if cmake_try_run "${cmake_cxx_compiler}" "${cmake_cxx_flags}" "${TMPFILE}.cxx" >> cmake_bootstrap.log 2>&1; then
  cmake_report cmConfigure.h "/* #undef CMAKE_NO_ANSI_STRING_STREAM */"
  echo "${cmake_cxx_compiler} has ANSI string streams"
else
  cmake_report cmConfigure.h "#define CMAKE_NO_ANSI_STRING_STREAM 1"
  echo "${cmake_cxx_compiler} does not have ANSI string streams"
fi
rm -f "${TMPFILE}.cxx"

if cmake_try_run "${cmake_cxx_compiler}" "${cmake_cxx_flags}" "${cmake_source_dir}/Modules/TestForAnsiForScope.cxx" >> cmake_bootstrap.log 2>&1; then
  cmake_report cmConfigure.h "/* #undef CMAKE_NO_ANSI_FOR_SCOPE */"
  echo "${cmake_cxx_compiler} has ANSI for scoping"
else
  cmake_report cmConfigure.h "#define CMAKE_NO_ANSI_FOR_SCOPE 1"
  echo "${cmake_cxx_compiler} does not have ANSI for scoping"
fi

# Get CMake version
for a in MAJOR MINOR PATCH; do
  CMake_VERSION=`cat "${cmake_source_dir}/CMakeLists.txt" | grep "SET(CMake_VERSION_${a} *[0-9]*)" | sed "s/SET(CMake_VERSION_${a} *\([0-9]*\))/\1/"`
  cmake_report cmConfigure.h "#define CMake_VERSION_${a} ${CMake_VERSION}"
done

# Generate Makefile
dep="cmConfigure.h `cmake_escape \"${cmake_source_dir}\"`/Source/*.h"
objs=""
for a in ${CMAKE_SOURCES}; do
  objs="${objs} ${a}.o"
done
cmake_cxx_flags="${cmake_ansi_cxx_flags} ${cmake_cxx_flags} -DCMAKE_ROOT_DIR='\"${cmake_source_dir}\"' -DCMAKE_BOOTSTRAP -I`cmake_escape \"${cmake_source_dir}/Source\"` -I`cmake_escape \"${cmake_bootstrap_dir}\"`"
echo "cmake: ${objs}" > "${cmake_bootstrap_dir}/Makefile"
echo "	${cmake_cxx_compiler} ${cmake_cxx_flags} ${objs} -o cmake" >> "${cmake_bootstrap_dir}/Makefile"
for a in ${CMAKE_SOURCES}; do
  src=`cmake_escape "${cmake_source_dir}/Source/${a}.cxx"`
  echo "${a}.o : ${src} ${dep}" >> "${cmake_bootstrap_dir}/Makefile"
  echo "	${cmake_cxx_compiler} ${cmake_cxx_flags} -c ${src} -o ${a}.o" >> "${cmake_bootstrap_dir}/Makefile"
done

# Write prefix to Bootstrap.cmk/InitialConfigureFlags.cmake
echo "SET (CMAKE_CONFIGURE_INSTALL_PREFIX \"${cmake_prefix_dir}\" CACHE PATH \"Install path prefix, prepended onto install directories, For CMake this will always override CMAKE_INSTALL_PREFIX in the cache.\")" > "${cmake_bootstrap_dir}/InitialConfigureFlags.cmake"

echo "---------------------------------------------"

${cmake_make_processor}
RES=$?
if [ "${RES}" -ne "0" ]; then
  echo "Problem while bootstrapping CMake"
  exit 8
fi
cd "${cmake_binary_dir}"
"${cmake_bootstrap_dir}/cmake" "${cmake_source_dir}"

echo "---------------------------------------------"