#!/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.

 # CT_TOP_DIR is set by the makefile. If we don't have it, something's gone horribly wrong...

 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, or not a directory. Something's gone horribly wrong."

     echo "Please send a bug report (see README)"

     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 policy:

 #  - what goes to the log file goes to fd #1 (stdout)

 #  - what goes to the screen goes to fd #6

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

 exec 6>&1

 exec >>"${tmp_log_file}"

 # 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"

 # renice oursleves

 renice ${CT_NICE} $$ |CT_DoLog DEBUG

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

 CT_DoLog INFO "Build started ${CT_STAR_DATE_HUMAN}"

 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"

 # 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_DoLog INFO "Building environment variables"

 # Target triplet: CT_TARGET needs a little love:

 CT_DoBuildTargetTriplet

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

 # then rescan the options file now:

 . "${CT_TOP_DIR}/.config"

 # 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_LIBFLOAT_FILE="libfloat-${CT_LIBFLOAT_VERSION}"

 # Where will we work?

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

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

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

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

 # Make all path absolute, it so much easier!

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

 # 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

 # 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_TOP_DIR}/tools/config.guess`

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

 CT_DoLog EXTRA "Preparing working directories"

 # 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}.$$"

     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}.$$"

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

 fi

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

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

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

     nohup rm -rf "${CT_BUILD_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}.$$"

     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}.$$"

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

 fi

 # 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"

 # Create the directories we'll use

 mkdir -p "${CT_TARBALLS_DIR}"

 mkdir -p "${CT_SRC_DIR}"

 mkdir -p "${CT_BUILD_DIR}"

 mkdir -p "${CT_INSTALL_DIR}"

 mkdir -p "${CT_DEBUG_INSTALL_DIR}"

 mkdir -p "${CT_CC_CORE_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 "${CT_LOG_TO_FILE},${CT_LOG_FILE}" in

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

           ;;

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

           mv "${tmp_log_file}" "${CT_LOG_FILE}"

           exec >>"${CT_LOG_FILE}"

           ;;

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

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

           exec >>"${CT_LOG_FILE}"

           ;;

 esac

 # 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="`${CT_TOP_DIR}/tools/config.sub \"${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 gcc; do

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

     case "${CT_TOOLCHAIN_TYPE}" in

         cross|native)   ln -s "`which ${tool}`" "${CT_PREFIX_DIR}/bin/${CT_HOST}-${tool}";;

     esac

 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"

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

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

 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

 do_debug_get

 CT_EndStep

 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_cc_core_extract

     do_libfloat_extract

     do_libc_extract

     do_cc_extract

     do_debug_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

         do_debug

         # Create the aliases to the target tools

         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

         # 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

 fi

 # 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}"

 # We stil have some small bits to log

 chmod u+w "${CT_LOG_FILE}"

 CT_DoEnd INFO

 # All files should now be read-only, log-file included

 chmod a-w "${CT_LOG_FILE}"

 # Restore a 'normal' color setting

 echo -en "${CT_NORMAL_COLOR}"

 trap - EXIT