#!/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 builds the tools.

 # Parse the common functions

 . "${CT_LIB_DIR}/scripts/functions"

 CT_STAR_DATE=`CT_DoDate +%s%N`

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

 # Are we configured? We'll need that later...

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

 # Parse the configuration file

 # It has some info about the logging facility, so include it early

 . "${CT_TOP_DIR}/.config"

 # 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

 CT_DoStep DEBUG "Dumping crosstool-NG configuration"

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

 CT_EndStep

 # Some sanity checks in the environment and needed tools

 CT_DoLog INFO "Checking environment sanity"

 CT_DoLog DEBUG "Unsetting and unexporting MAKEFLAGS"

 unset MAKEFLAGS

 export MAKEFLAGS

 # 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_HasOrAbort lynx

 CT_DoLog INFO "Building environment variables"

 # Parse architecture-specific functions

 . "${CT_LIB_DIR}/arch/${CT_ARCH}/functions"

 # Target tuple: CT_TARGET needs a little love:

 CT_DoBuildTargetTuple

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

 # then rescan the options file now:

 . "${CT_TOP_DIR}/.config"

 # Second kludge: merge user-supplied target CFLAGS with architecture-provided

 # target CFLAGS

 CT_TARGET_CFLAGS="${CT_ARCH_TARGET_CFLAGS} ${CT_TARGET_CFLAGS}"

 # 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}"

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

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

 # Where will we work?

 CT_TARBALLS_DIR="${CT_TOP_DIR}/targets/tarballs"

 CT_SRC_DIR="${CT_TOP_DIR}/targets/src"

 CT_BUILD_DIR="${CT_TOP_DIR}/targets/${CT_TARGET}/build"

 CT_DEBUG_INSTALL_DIR="${CT_INSTALL_DIR}/${CT_TARGET}/debug-root"

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

 # not mix the two builds: core and final.

 CT_CC_CORE_STATIC_PREFIX_DIR="${CT_BUILD_DIR}/${CT_CC}-core-static"

 CT_CC_CORE_SHARED_PREFIX_DIR="${CT_BUILD_DIR}/${CT_CC}-core-shared"

 CT_STATE_DIR="${CT_TOP_DIR}/targets/${CT_TARGET}/state"

 # We must ensure that we can restart if asked for!

 if [ -n "${CT_RESTART}" -a ! -d "${CT_STATE_DIR}"  ]; then

     CT_DoLog ERROR "You asked to restart a non-restartable build"

     CT_DoLog ERROR "This happened because you didn't set CT_DEBUG_CT_SAVE_STEPS"

     CT_DoLog ERROR "in the config options for the previous build, or the state"

     CT_DoLog ERROR "directory for the previous build was deleted."

     CT_Abort "I will stop here to avoid any carnage"

 fi

 # Make all path absolute, it so much easier!

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

 # If the local tarball directory does not exist, say so, and don't try to save there!

 if [ ! -d "${CT_LOCAL_TARBALLS_DIR}" ]; then

     CT_DoLog WARN "Directory \"${CT_LOCAL_TARBALLS_DIR}\" does not exist. Will not save downloaded tarballs to local storage."

     CT_SAVE_TARBALLS=""

 fi

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

 case "${CT_LOCAL_TARBALLS_DIR},${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

 # 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

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

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

 CT_SYS_USER="`id -un`"

 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_GCC=`gcc -dumpversion`

 CT_SYS_TARGET=`CT_DoConfigGuess`

 CT_TOOLCHAIN_ID="crosstool-${CT_VERSION} build ${CT_STAR_DATE_HUMAN} by ${CT_SYS_USER}@${CT_SYS_HOSTNAME}"

 CT_DoLog EXTRA "Preparing working directories"

 # Ah! The build directory shall be eradicated, even if we restart!

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

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

     chmod -R u+w "${CT_BUILD_DIR}.$$"

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

 fi

 # Don't eradicate directories if we need to restart

 if [ -z "${CT_RESTART}" ]; then

     # 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 [ "${CT_FORCE_DOWNLOAD}" = "y" -a -d "${CT_TARBALLS_DIR}" ]; then

         mv "${CT_TARBALLS_DIR}" "${CT_TARBALLS_DIR}.$$"

         chmod -R u+w "${CT_TARBALLS_DIR}.$$"

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

     fi

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

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

         chmod -R u+w "${CT_SRC_DIR}.$$"

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

     fi

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

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

         chmod -R u+w "${CT_INSTALL_DIR}.$$"

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

     fi

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

         mv "${CT_DEBUG_INSTALL_DIR}" "${CT_DEBUG_INSTALL_DIR}.$$"

         chmod -R u+w "${CT_DEBUG_INSTALL_DIR}.$$"

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

     fi

     # In case we start anew, get rid of the previously saved state directory

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

         mv "${CT_STATE_DIR}" "${CT_STATE_DIR}.$$"

         chmod -R u+w "${CT_STATE_DIR}.$$"

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

     fi

 fi

 # Create the directories we'll use, even if restarting: it does no harm to

 # create already existent directories, and CT_BUILD_DIR needs to be created

 # anyway

 mkdir -p "${CT_TARBALLS_DIR}"

 mkdir -p "${CT_SRC_DIR}"

 mkdir -p "${CT_BUILD_DIR}"

 mkdir -p "${CT_INSTALL_DIR}"

 mkdir -p "${CT_PREFIX_DIR}"

 mkdir -p "${CT_DEBUG_INSTALL_DIR}"

 mkdir -p "${CT_CC_CORE_STATIC_PREFIX_DIR}"

 mkdir -p "${CT_CC_CORE_SHARED_PREFIX_DIR}"

 mkdir -p "${CT_STATE_DIR}"

 # Kludge: CT_INSTALL_DIR and CT_PREFIX_DIR might have grown read-only if

 # the previous build was successful. To be able to move the logfile there,

 # switch them back to read/write

 chmod -R u+w "${CT_INSTALL_DIR}" "${CT_PREFIX_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

 exec >/dev/null

 case "${CT_LOG_TO_FILE}" in

     y)  CT_LOG_FILE="${CT_PREFIX_DIR}/build.log"

         cat "${tmp_log_file}" >>"${CT_LOG_FILE}"

         rm -f "${tmp_log_file}"

         exec >>"${CT_LOG_FILE}"

         ;;

     *)  rm -f "${tmp_log_file}"

         ;;

 esac

 # Setting up the rest of the environment only if not restarting

 if [ -z "${CT_RESTART}" ]; then

     # Determine build system if not set by the user

     CT_Test "You did not specify the build system. That's OK, I can guess..." -z "${CT_BUILD}"

     CT_BUILD="${CT_BUILD:-`CT_DoConfigGuess`}"

     CT_BUILD=`CT_DoConfigSub "${CT_BUILD}"`

     # 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.

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

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

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

         CT_CANADIAN_OPT="--build=${CT_UNIQ_BUILD}"

         # We shall have a compiler for this target!

         # Do test here...

     else

         CT_HOST="${CT_BUILD}"

         CT_CANADIAN_OPT="--build=${CT_BUILD}"

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

         # Carefully add paths in the order we want them:

         #  - first try in ${CT_PREFIX_DIR}/bin

         #  - then try in ${CT_CC_CORE_SHARED_PREFIX_DIR}/bin

         #  - then try in ${CT_CC_CORE_STATIC_PREFIX_DIR}/bin

         #  - fall back to searching user's PATH

         export PATH="${CT_PREFIX_DIR}/bin:${CT_CC_CORE_SHARED_PREFIX_DIR}/bin:${CT_CC_CORE_STATIC_PREFIX_DIR}/bin:${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) ;;

         *,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 DEBUG "Making build system tools available"

     mkdir -p "${CT_PREFIX_DIR}/bin"

     for tool in ar as dlltool gcc g++ gnatbind gnatmake ld nm ranlib strip windres objcopy objdump; do

         tmp=`CT_Which ${tool}`

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

             ln -sfv "${tmp}" "${CT_PREFIX_DIR}/bin/${CT_BUILD}-${tool}"

             ln -sfv "${tmp}" "${CT_PREFIX_DIR}/bin/${CT_UNIQ_BUILD}-${tool}"

             ln -sfv "${tmp}" "${CT_PREFIX_DIR}/bin/${CT_HOST}-${tool}"

         fi |CT_DoLog DEBUG

     done

     # Help gcc

     CT_CFLAGS_FOR_HOST=

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

     # Override the configured jobs with what's been given on the command line

     [ -n "${CT_JOBS}" ] && CT_PARALLEL_JOBS="${CT_JOBS}"

     # 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

 fi

 # 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.

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

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

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

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

 . "${CT_LIB_DIR}/scripts/build/debug.sh"

 . "${CT_LIB_DIR}/scripts/build/tools.sh"

 if [ -z "${CT_RESTART}" ]; then

     CT_DoStep INFO "Retrieving needed toolchain components' tarballs"

     do_kernel_get

     do_binutils_get

     do_cc_get

     do_libc_get

     do_tools_get

     do_debug_get

     CT_EndStep

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

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

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

             setsid 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_cc_extract

         do_libc_extract

         do_tools_extract

         do_debug_extract

         CT_EndStep

     fi

 fi

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

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

     # Because of CT_RESTART, this becomes quite complex

     do_stop=0

     prev_step=

     [ -n "${CT_RESTART}" ] && do_it=0 || do_it=1

     for step in libc_check_config       \

                 kernel_check_config     \

                 kernel_headers          \

                 binutils                \

                 cc_core_pass_1          \

                 libc_headers            \

                 libc_start_files        \

                 cc_core_pass_2          \

                 libc                    \

                 cc                      \

                 libc_finish             \

                 tools                   \

                 debug                   \

                 ; do

         if [ ${do_it} -eq 0 ]; then

             if [ "${CT_RESTART}" = "${step}" ]; then

                 CT_DoLoadState "${step}"

                 do_it=1

                 do_stop=0

             fi

         else

             CT_DoSaveState ${step}

             if [ ${do_stop} -eq 1 ]; then

                 CT_DoLog ERROR "Stopping just after step \"${prev_step}\", as requested."

                 exit 0

             fi

         fi

         if [ ${do_it} -eq 1 ]; then

             do_${step}

             if [ "${CT_STOP}" = "${step}" ]; then

                 do_stop=1

             fi

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

                 CT_DoPause "Step \"${step}\" finished"

             fi

         fi

         prev_step="${step}"

     done

     CT_DoLog DEBUG "Removing access to the build system tools"

     find "${CT_PREFIX_DIR}/bin" -name "${CT_BUILD}-"'*' -exec rm -fv {} \; |CT_DoLog DEBUG

     find "${CT_PREFIX_DIR}/bin" -name "${CT_UNIQ_BUILD}-"'*' -exec rm -fv {} \; |CT_DoLog DEBUG

     find "${CT_PREFIX_DIR}/bin" -name "${CT_HOST}-"'*' -exec rm -fv {} \; |CT_DoLog DEBUG

     # Install the /populator/

     CT_DoLog EXTRA "Installing the populate helper"

     sed -r -e 's,@@CT_READELF@@,'"${CT_PREFIX_DIR}/bin/${CT_TARGET}-readelf"',g;'   \

            -e 's,@@CT_SYSROOT_DIR@@,'"${CT_SYSROOT_DIR}"',g;'                       \

            "${CT_LIB_DIR}/tools/populate.in" >"${CT_PREFIX_DIR}/bin/${CT_TARGET}-populate"

     chmod 755 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-populate"

     # Create the aliases to the target tools

     CT_DoStep EXTRA "Creating toolchain aliases"

     CT_Pushd "${CT_PREFIX_DIR}/bin"

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

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

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

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

             ln -sv "${t}" "${_t}" 2>&1 |CT_DoLog ALL

         fi

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

             _t="`echo \"$t\" |sed -r -e \"${CT_TARGET_ALIAS_SED_EXPR}\"`"

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

             ln -sv "${t}" "${_t}" 2>&1 |CT_DoLog ALL

         fi

     done

     CT_Popd

     CT_EndStep

     # Remove the generated documentation files

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

     	CT_DoLog INFO "Removing installed documentation"

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

         rm -rf "${CT_SYSROOT_DIR}/"{,usr/}{man,info}

         rm -rf "${CT_DEBUG_INSTALL_DIR}/"{,usr/}{man,info}

     fi

 fi

 CT_DoEnd INFO

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

     CT_DoLog EXTRA "Compressing log file"

     exec >/dev/null

     bzip2 -9 "${CT_LOG_FILE}"

 fi

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

     # OK, now we're done, set the toolchain read-only

     # Don't log, the log file may become read-only any moment...

     chmod -R a-w "${CT_INSTALL_DIR}" >/dev/null 2>&1

 fi

 trap - EXIT