#!/bin/bash

# Copyright 2007 Yann E. MORIN

# Licensed under the GPL v2. See COPYING in the root of this package.

# This is the main entry point to crosstool

# This will:

#   - download, extract and patch the toolchain components

#   - build and install each components in turn

#   - and eventually test the resulting toolchain

# What this file does is prepare the environment, based upon the user-choosen

# options. It also checks the existing environment for un-friendly variables,

# and checks for needed tools. It eventually calls the main build script.

# User must set CT_TOP_DIR in is environment!

# Once we can build out-of-tree, then this will have to go.

if [ -z "${CT_TOP_DIR}" -o ! -d "${CT_TOP_DIR}" ]; then

    # We don't have the functions right now, because we don't have CT_TOP_DIR.

    # Do the print stuff by hand:

    echo "CT_TOP_DIR not set. You must set CT_TOP_DIR to the top directory where crosstool is installed."

    exit 1

fi

# Parse the common functions

. "${CT_TOP_DIR}/scripts/functions"

CT_STAR_DATE=`CT_DoDate +%s%N`

CT_STAR_DATE_HUMAN=`CT_DoDate +%Y%m%d.%H%M%S`

# Log to a temporary file until we have built our environment

CT_ACTUAL_LOG_FILE="${CT_TOP_DIR}/$$.log"

# CT_TOP_DIR should be an absolute path.

CT_TOP_DIR="`CT_MakeAbsolutePath \"${CT_TOP_DIR}\"`"

# Parse the configuration file

CT_TestOrAbort "Configuration file not found. Please create one." -f "${CT_TOP_DIR}/.config"

. "${CT_TOP_DIR}/.config"

# Override the color scheme if needed

if [ "${CT_LOG_USE_COLORS}" = "y" ]; then

    CT_ERROR_COLOR="${_A_NOR}${_A_BRI}${_F_RED}"

    CT_WARN_COLOR="${_A_NOR}${_A_BRI}${_F_YEL}"

    CT_INFO_COLOR="${_A_NOR}${_A_BRI}${_F_GRN}"

    CT_EXTRA_COLOR="${_A_NOR}${_A_DIM}${_F_GRN}"

    CT_DEBUG_COLOR="${_A_NOR}${_A_BRI}${_F_BLU}"

    CT_ALL_COLOR="${_A_NOR}${_A_DIM}${_F_WHI}"

    CT_NORMAL_COLOR="${_A_NOR}"

else

    CT_ERROR_COLOR=

    CT_WARN_COLOR=

    CT_INFO_COLOR=

    CT_EXTRA_COLOR=

    CT_DEBUG_COLOR=

    CT_ALL_COLOR=

    CT_NORMAL_COLOR=

fi

# Yes! We can do full logging from now on!

CT_DoLog INFO "Build started ${CT_STAR_DATE_HUMAN}"

# renice oursleves

renice ${CT_NICE} $$ |CT_DoLog DEBUG

# Some sanity checks in the environment and needed tools

CT_DoLog INFO "Checking environment sanity"

# Enable known ordering of files in directory listings:

CT_Test "Crosstool-NG might not work as expected with LANG=\"${LANG}\"" -n "${LANG}"

case "${LC_COLLATE},${LC_ALL}" in

  # These four combinations are known to sort files in the correct order:

  fr_FR*,)  ;;

  en_US*,)  ;;

  *,fr_FR*) ;;

  *,en_US*) ;;

  # Anything else is destined to be borked if not gracefuly handled:

  *) CT_DoLog WARN "Either LC_COLLATE=\"${LC_COLLATE}\" or LC_ALL=\"${LC_ALL}\" is not supported."

     export LC_ALL=`locale -a |egrep "^(fr_FR|en_US)" |head -n 1`

     CT_TestOrAbort "Neither en_US* nor fr_FR* locales found on your system." -n "${LC_ALL}"

     CT_DoLog WARN "Forcing to known working LC_ALL=\"${LC_ALL}\"."

     ;;

esac

# Other environment sanity checks

CT_TestAndAbort "Don't set LD_LIBRARY_PATH. It screws up the build." -n "${LD_LIBRARY_PATH}"

CT_TestAndAbort "Don't set CFLAGS. It screws up the build." -n "${CFLAGS}"

CT_TestAndAbort "Don't set CXXFLAGS. It screws up the build." -n "${CXXFLAGS}"

CT_Test "GREP_OPTIONS screws up the build. Resetting." -n "${GREP_OPTIONS}"

GREP_OPTIONS=

CT_HasOrAbort awk

CT_HasOrAbort sed

CT_HasOrAbort bison

CT_HasOrAbort flex

CT_DoStep DEBUG "Dumping crosstool-NG configuration"

cat ${CT_TOP_DIR}/.config |egrep '^(# |)CT_' |CT_DoLog DEBUG

CT_EndStep

CT_DoLog INFO "Building environment variables"

# Target triplet: CT_TARGET needs a little love:

CT_DoBuildTargetTriplet

# Now, build up the variables from the user-configured options.

CT_KERNEL_FILE="${CT_KERNEL}-${CT_KERNEL_VERSION}"

CT_BINUTILS_FILE="binutils-${CT_BINUTILS_VERSION}"

if [ "${CT_CC_USE_CORE}" != "y" ]; then

    CT_CC_CORE="${CT_CC}"

    CT_CC_CORE_VERSION="${CT_CC_VERSION}"

    CT_CC_CORE_EXTRA_CONFIG="${CT_CC_EXTRA_CONFIG}"

fi

CT_CC_CORE_FILE="${CT_CC_CORE}-${CT_CC_CORE_VERSION}"

CT_CC_FILE="${CT_CC}-${CT_CC_VERSION}"

CT_LIBC_FILE="${CT_LIBC}-${CT_LIBC_VERSION}"

[ "${CT_ARCH_FLOAT_SW_LIBFLOAT}" = "y" ] && CT_LIBFLOAT_FILE="libfloat-990616"

# Kludge: If any of the configured options needs CT_TARGET or CT_TOP_DIR,

# then rescan the options file now:

. "${CT_TOP_DIR}/.config"

# Some more sanity checks now that we have all paths set up

case "${CT_TARBALLS_DIR},${CT_SRC_DIR},${CT_BUILD_DIR},${CT_PREFIX_DIR},${CT_INSTALL_DIR}" in

    *" "*) CT_Abort "Don't use spaces in paths, it breaks things.";;

esac

# Note: we'll always install the core compiler in its own directory, so as to

# not mix the two builds: core and final. Anyway, its generic, wether we use

# a different compiler as core, or not.

CT_CC_CORE_PREFIX_DIR="${CT_BUILD_DIR}/${CT_CC}-core"

# Good, now grab a bit of informations on the system we're being run,

# just in case something goes awok, and it's not our fault:

CT_SYS_HOSTNAME=`hostname -f 2>/dev/null || true`

# Hmmm. Some non-DHCP-enabled machines do not have an FQDN... Fall back to node name.

CT_SYS_HOSTNAME="${CT_SYS_HOSTNAME:-`uname -n`}"

CT_SYS_KERNEL=`uname -s`

CT_SYS_REVISION=`uname -r`

# MacOS X lacks '-o' :

CT_SYS_OS=`uname -o || echo "Unknown (maybe MacOS-X)"`

CT_SYS_MACHINE=`uname -m`

CT_SYS_PROCESSOR=`uname -p`

CT_SYS_USER="`id -un`"

CT_SYS_DATE=`CT_DoDate +%Y%m%d.%H%M%S`

CT_SYS_GCC=`gcc -dumpversion`

CT_TOOLCHAIN_ID="crosstool-${CT_VERSION} build ${CT_SYS_DATE} by ${CT_SYS_USER}@${CT_SYS_HOSTNAME} for ${CT_TARGET}"

# Check now if we can write to the destination directory:

if [ -d "${CT_INSTALL_DIR}" ]; then

    CT_TestAndAbort "Destination directory \"${CT_INSTALL_DIR}\" is not removable" ! -w `dirname "${CT_INSTALL_DIR}"`

fi

# Get rid of pre-existing installed toolchain and previous build directories.

# We need to do that _before_ we can safely log, because the log file will

# most probably be in the toolchain directory.

if [ -d "${CT_INSTALL_DIR}" ]; then

    mv "${CT_INSTALL_DIR}" "${CT_INSTALL_DIR}.$$"

    nohup rm -rf "${CT_INSTALL_DIR}.$$" >/dev/null 2>&1 &

fi

if [ -d "${CT_BUILD_DIR}" ]; then

    mv "${CT_BUILD_DIR}" "${CT_BUILD_DIR}.$$"

    nohup rm -rf "${CT_BUILD_DIR}.$$" >/dev/null 2>&1 &

fi

if [ "${CT_FORCE_EXTRACT}" = "y" -a -d "${CT_SRC_DIR}" ]; then

    mv "${CT_SRC_DIR}" "${CT_SRC_DIR}.$$"

    nohup rm -rf "${CT_SRC_DIR}.$$" >/dev/null 2>&1 &

fi

mkdir -p "${CT_INSTALL_DIR}"

mkdir -p "${CT_BUILD_DIR}"

mkdir -p "${CT_TARBALLS_DIR}"

mkdir -p "${CT_SRC_DIR}"

# Make all path absolute, it so much easier!

# Now we have had the directories created, we even will get rid of embedded .. in paths:

CT_SRC_DIR="`CT_MakeAbsolutePath \"${CT_SRC_DIR}\"`"

CT_TARBALLS_DIR="`CT_MakeAbsolutePath \"${CT_TARBALLS_DIR}\"`"

# Redirect log to the actual log file now we can

# It's quite understandable that the log file will be installed in the install

# directory, so we must first ensure it exists and is writeable (above) before

# we can log there

case "${CT_LOG_TO_FILE},${CT_LOG_FILE}" in

    ,*)   rm -f "${CT_ACTUAL_LOG_FILE}"

          CT_ACTUAL_LOG_FILE=/dev/null

          ;;

    y,/*) mkdir -p "`dirname \"${CT_LOG_FILE}\"`"

          mv "${CT_ACTUAL_LOG_FILE}" "${CT_LOG_FILE}"

          CT_ACTUAL_LOG_FILE="${CT_LOG_FILE}"

          ;;

    y,*)  mkdir -p "`pwd`/`dirname \"${CT_LOG_FILE}\"`"

          mv "${CT_ACTUAL_LOG_FILE}" "`pwd`/${CT_LOG_FILE}"

          CT_ACTUAL_LOG_FILE="`pwd`/${CT_LOG_FILE}"

          ;;

esac

# Determine build system if not set by the user

CT_Test "You did not specify the build system. Guessing." -z "${CT_BUILD}"

CT_BUILD="`${CT_TOP_DIR}/tools/config.sub \"${CT_BUILD:-\`${CT_TOP_DIR}/tools/config.guess\`}\"`"

# Arrange paths depending on wether we use sys-root or not.

if [ "${CT_USE_SYSROOT}" = "y" ]; then

    CT_SYSROOT_DIR="${CT_PREFIX_DIR}/${CT_TARGET}/sys-root"

    CT_HEADERS_DIR="${CT_SYSROOT_DIR}/usr/include"

    BINUTILS_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"

    CC_CORE_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"

    CC_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"

    LIBC_SYSROOT_ARG=""

    # glibc's prefix must be exactly /usr, else --with-sysroot'd gcc will get

    # confused when $sysroot/usr/include is not present.

    # Note: --prefix=/usr is magic!

    # See http://www.gnu.org/software/libc/FAQ.html#s-2.2

else

    # plain old way. All libraries in prefix/target/lib

    CT_SYSROOT_DIR="${CT_PREFIX_DIR}/${CT_TARGET}"

    CT_HEADERS_DIR="${CT_SYSROOT_DIR}/include"

    # hack!  Always use --with-sysroot for binutils.

    # binutils 2.14 and later obey it, older binutils ignore it.

    # Lets you build a working 32->64 bit cross gcc

    BINUTILS_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"

    # Use --with-headers, else final gcc will define disable_glibc while

    # building libgcc, and you'll have no profiling

    CC_CORE_SYSROOT_ARG="--without-headers"

    CC_SYSROOT_ARG="--with-headers=${CT_HEADERS_DIR}"

    LIBC_SYSROOT_ARG="prefix="

fi

# Prepare the 'lib' directories in sysroot, else the ../lib64 hack used by

# 32 -> 64 bit crosscompilers won't work, and build of final gcc will fail with

#  "ld: cannot open crti.o: No such file or directory"

mkdir -p "${CT_SYSROOT_DIR}/lib"

mkdir -p "${CT_SYSROOT_DIR}/usr/lib"

# Canadian-cross are really picky on the way they are built. Tweak the values.

if [ "${CT_CANADIAN}" = "y" ]; then

    # Arrange so that gcc never, ever think that build system == host system

    CT_CANADIAN_OPT="--build=`echo \"${CT_BUILD}\" |sed -r -e 's/-/-build_/'`"

    # We shall have a compiler for this target!

    # Do test here...

else

    CT_HOST="${CT_BUILD}"

    CT_CANADIAN_OPT=

    # Add the target toolchain in the path so that we can build the C library

    export PATH="${CT_PREFIX_DIR}/bin:${CT_CC_CORE_PREFIX_DIR}/bin:${PATH}"

fi

# Modify GCC_HOST to never be equal to $BUILD or $TARGET

# This strange operation causes gcc to always generate a cross-compiler

# even if the build machine is the same kind as the host.

# This is why CC has to be set when doing a canadian cross; you can't find a

# host compiler by appending -gcc to our whacky $GCC_HOST

# Kludge: it is reported that the above causes canadian crosses with cygwin

# hosts to fail, so avoid it just in that one case.  It would be cleaner to

# just move this into the non-canadian case above, but I'm afraid that might

# cause some configure script somewhere to decide that since build==host, they

# could run host binaries.

# (Copied almost as-is from original crosstool):

case "${CT_KERNEL},${CT_CANADIAN}" in

    cygwin,y) ;;

    *)        CT_HOST="`echo \"${CT_HOST}\" |sed -r -e 's/-/-host_/;'`";;

esac

# Ah! Recent versions of binutils need some of the build and/or host system

# (read CT_BUILD and CT_HOST) tools to be accessible (ar is but an example).

# Do that:

CT_DoLog EXTRA "Making build system tools available"

mkdir -p "${CT_PREFIX_DIR}/bin"

for tool in ar; do

    ln -s "`which ${tool}`" "${CT_PREFIX_DIR}/bin/${CT_BUILD}-${tool}"

    ln -s "`which ${tool}`" "${CT_PREFIX_DIR}/bin/${CT_HOST}-${tool}"

done

# Ha. cygwin host have an .exe suffix (extension) for executables.

[ "${CT_KERNEL}" = "cygwin" ] && EXEEXT=".exe" || EXEEXT=""

# Transform the ARCH into a kernel-understandable ARCH

case "${CT_ARCH}" in

    x86) CT_KERNEL_ARCH=i386;;

    ppc) CT_KERNEL_ARCH=powerpc;;

    *)   CT_KERNEL_ARCH="${CT_ARCH}";;

esac

# Build up the TARGET_CFLAGS from user-provided options

# Override with user-specified CFLAGS

[ -n "${CT_ARCH_CPU}" ]  && CT_TARGET_CFLAGS="-mcpu=${CT_ARCH_CPU} ${CT_TARGET_CFLAGS}"

[ -n "${CT_ARCH_TUNE}" ] && CT_TARGET_CFLAGS="-mtune=${CT_ARCH_TUNE} ${CT_TARGET_CFLAGS}"

[ -n "${CT_ARCH_ARCH}" ] && CT_TARGET_CFLAGS="-march=${CT_ARCH_ARCH} ${CT_TARGET_CFLAGS}"

[ -n "${CT_ARCH_FPU}" ]  && CT_TARGET_CFLAGS="-mfpu=${CT_ARCH_FPU} ${CT_TARGET_CFLAGS}"

# Help gcc

CT_CFLAGS_FOR_HOST=

[ "${CT_USE_PIPES}" = "y" ] && CT_CFLAGS_FOR_HOST="${CT_CFLAGS_FOR_HOST} -pipe"

# And help make go faster

PARALLELMFLAGS=

[ ${CT_PARALLEL_JOBS} -ne 0 ] && PARALLELMFLAGS="${PARALLELMFLAGS} -j${CT_PARALLEL_JOBS}"

[ ${CT_LOAD} -ne 0 ] && PARALLELMFLAGS="${PARALLELMFLAGS} -l${CT_LOAD}"

CT_DoStep EXTRA "Dumping internal crosstool-NG configuration"

CT_DoLog EXTRA "Building a toolchain for:"

CT_DoLog EXTRA "  build  = ${CT_BUILD}"

CT_DoLog EXTRA "  host   = ${CT_HOST}"

CT_DoLog EXTRA "  target = ${CT_TARGET}"

set |egrep '^CT_.+=' |sort |CT_DoLog DEBUG

CT_EndStep

# Include sub-scripts instead of calling them: that way, we do not have to

# export any variable, nor re-parse the configuration and functions files.

. "${CT_TOP_DIR}/scripts/build/kernel_${CT_KERNEL}.sh"

. "${CT_TOP_DIR}/scripts/build/binutils.sh"

. "${CT_TOP_DIR}/scripts/build/libfloat.sh"

. "${CT_TOP_DIR}/scripts/build/libc_${CT_LIBC}.sh"

. "${CT_TOP_DIR}/scripts/build/cc_core_${CT_CC_CORE}.sh"

. "${CT_TOP_DIR}/scripts/build/cc_${CT_CC}.sh"

# Now for the job by itself. Go have a coffee!

if [ "${CT_NO_DOWNLOAD}" != "y" ]; then

	CT_DoStep INFO "Retrieving needed toolchain components' tarballs"

    do_kernel_get

    do_binutils_get

    do_cc_core_get

    do_libfloat_get

    do_libc_get

    do_cc_get

    CT_EndStep

fi

if [ "${CT_ONLY_DOWNLOAD}" != "y" ]; then

    if [ "${CT_FORCE_EXTRACT}" = "y" ]; then

        mv "${CT_SRC_DIR}" "${CT_SRC_DIR}.$$"

        nohup rm -rf "${CT_SRC_DIR}.$$" >/dev/null 2>&1

    fi

    CT_DoStep INFO "Extracting and patching toolchain components"

    do_kernel_extract

    do_binutils_extract

    do_libc_extract

    do_libfloat_extract

    do_cc_core_extract

    do_cc_extract

    CT_EndStep

    if [ "${CT_ONLY_EXTRACT}" != "y" ]; then

        do_libc_check_config

        do_kernel_check_config

        do_kernel_headers

        do_binutils

        do_libc_headers

        do_cc_core

        do_libfloat

        do_libc

        do_cc

        do_libc_finish

    fi

fi

if [ -n "${CT_TARGET_ALIAS}" ]; then

    CT_DoLog EXTRA "Creating symlinks from \"${CT_TARGET}-*\" to \"${CT_TARGET_ALIAS}-*\""

    CT_Pushd "${CT_PREFIX_DIR}/bin"

    for t in "${CT_TARGET}-"*; do

        _t="`echo \"$t\" |sed -r -e 's/^'\"${CT_TARGET}\"'-/'\"${CT_TARGET_ALIAS}\"'-/;'`"

        CT_DoLog DEBUG "Linking \"${_t}\" -> \"${t}\""

        ln -s "${t}" "${_t}"

    done

    CT_Popd

fi

if [ "${CT_REMOVE_DOCS}" = "y" ]; then

	CT_DoLog INFO "Removing installed documentation"

    rm -rf "${CT_PREFIX_DIR}/"{man,info}

fi

CT_STOP_DATE=`CT_DoDate +%s%N`

CT_STOP_DATE_HUMAN=`CT_DoDate +%Y%m%d.%H%M%S`

CT_DoLog INFO "Build completed at ${CT_STOP_DATE_HUMAN}"

elapsed=$((CT_STOP_DATE-CT_STAR_DATE))

elapsed_min=$((elapsed/(60*1000*1000*1000)))

elapsed_sec=`printf "%02d" $(((elapsed%(60*1000*1000*1000))/(1000*1000*1000)))`

elapsed_csec=`printf "%02d" $(((elapsed%(1000*1000*1000))/(10*1000*1000)))`

CT_DoLog INFO "(elapsed: ${elapsed_min}:${elapsed_sec}.${elapsed_csec})"

# Restore a 'normal' color setting

echo -en "${CT_NORMAL_COLOR}"

trap - EXIT