#!/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="`pwd`/$$.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"

 # The progress bar indicator is asked for

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

     _CT_PROG_BAR() {

         [ $((cpt/5)) -eq 0 ] && echo -en "/"

         [ $((cpt/5)) -eq 1 ] && echo -en "-"

         [ $((cpt/5)) -eq 2 ] && echo -en "\\"

         [ $((cpt/5)) -eq 3 ] && echo -en "|"

         echo -en "\r"

         cpt=$(((cpt+1)%20))

     }

     CT_PROG_BAR=_CT_PROG_BAR

     export -f _CT_PROG_BAR

 else

     CT_PROG_BAR=

 fi

 # Apply 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_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_NORMAL_COLOR=

 fi

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

 CT_DoLog INFO "Build started ${CT_STAR_DATE_HUMAN}"

 # 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"

 # This should go in buildToolchain.sh, but we might need it because it could

 # be used by the user in his/her paths definitions.

 # Target triplet: CT_TARGET needs a little love:

 case "${CT_ARCH_BE},${CT_ARCH_LE}" in

     y,) target_endian_eb=eb; target_endian_el=;;

     ,y) target_endian_eb=; target_endian_el=el;;

 esac

 case "${CT_ARCH}" in

     arm)  CT_TARGET="${CT_ARCH}${target_endian_eb}";;

     mips) CT_TARGET="${CT_ARCH}${target_endian_el}";;

     x86*) # Much love for this one :-(

           # Ultimately, we should use config.sub to output the correct

           # procesor name. Work for later...

           arch="${CT_ARCH_ARCH}"

           [ -z "${arch}" ] && arch="${CT_ARCH_TUNE}"

           case "${CT_ARCH}" in

               x86_64)      CT_TARGET=x86_64;;

           	  *)  case "${arch}" in

                       "")                                       CT_TARGET=i386;;

                       i386|i486|i586|i686)                      CT_TARGET="${arch}";;

                       winchip*)                                 CT_TARGET=i486;;

                       pentium|pentium-mmx|c3*)                  CT_TARGET=i586;;

                       nocona|athlon*64|k8|athlon-fx|opteron)    CT_TARGET=x86_64;;

                       pentiumpro|pentium*|athlon*)              CT_TARGET=i686;;

                       *)                                        CT_TARGET=i586;;

                   esac;;

           esac;;

 esac

 case "${CT_TARGET_VENDOR}" in

     "") CT_TARGET="${CT_TARGET}-unknown";;

     *)  CT_TARGET="${CT_TARGET}-${CT_TARGET_VENDOR}";;

 esac

 case "${CT_KERNEL}" in

     linux*)  CT_TARGET="${CT_TARGET}-linux";;

     cygwin*) CT_TARGET="${CT_TARGET}-cygwin";;

 esac

 case "${CT_LIBC}" in

     glibc)  CT_TARGET="${CT_TARGET}-gnu";;

     uClibc) CT_TARGET="${CT_TARGET}-uclibc";;

 esac

 CT_TARGET="`${CT_TOP_DIR}/tools/config.sub ${CT_TARGET}`"

 # 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"

 # 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\`}\"`"

 # 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_PREFIX_DIR}" ]; then

     mv "${CT_PREFIX_DIR}" "${CT_PREFIX_DIR}.$$"

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

 fi

 mkdir -p "${CT_PREFIX_DIR}"

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

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

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

 fi

 mkdir -p "${CT_BUILD_DIR}"

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

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

     CT_TestAndAbort "Destination directory \"${CT_INSTALL_DIR}\" is not writeable" ! -w "${CT_PREFIX_DIR}"

 else

     mkdir -p "${CT_PREFIX_DIR}" || CT_Abort "Could not create destination directory \"${CT_PREFIX_DIR}\""

 fi

 # 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

 t="${CT_ACTUAL_LOG_FILE}"

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

     ,*)   CT_ACTUAL_LOG_FILE=/dev/null

           rm -f "${t}"

           ;;

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

           CT_ACTUAL_LOG_FILE="${CT_LOG_FILE}"

           mv "${t}" "${CT_ACTUAL_LOG_FILE}"

           ;;

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

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

           mv "${t}" "${CT_ACTUAL_LOG_FILE}"

           ;;

 esac

 # 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 Unkown`

 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}"

 # renice oursleves

 renice ${CT_NICE} $$ |CT_DoLog DEBUG

 # 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/getExtractPatch.sh"

 . "${CT_TOP_DIR}/scripts/buildToolchain.sh"

 #. "${CT_TOP_DIR}/scripts/testToolchain.sh"

 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