#!/bin/sh
# LLVM LOCAL file B&I

set -x

# Build LLVM the "Apple way".
# Parameters:

# The first parameter is a space-separated list of the architectures the
# compilers will run on. For instance, "ppc i386". If the current machine
# isn't in the list, it will (effectively) be added.
# FIXME: HOSTS is not used in this script. Use it or Remove it.
HOSTS="$1"

# The second parameter is a space-separated list of the architectures the
# compilers will generate code for. If the current machine isn't in the list, a
# compiler for it will get built anyway, but won't be installed.
TARGETS="$2"

# The third parameter is the path to the compiler sources. There should be a
# shell script named 'configure' in this directory. This script makes a copy...
ORIG_SRC_DIR="$3"

# The fourth parameter is the location where the LLVM will be installed. You can
# move it once it's built, so this mostly controls the layout of $DEST_DIR.
DEST_ROOT="$4"

# The fifth parameter is the place where the compiler will be copied once it's
# built.
DEST_DIR="$5"

# The sixth parameter is a directory in which to place information (like
# unstripped executables and generated source files) helpful in debugging the
# resulting compiler.
SYM_DIR="$6"

# The seventh parameter is the version number of the submission, e.g. 1007.
LLVM_SUBMIT_VERSION="$7"

# The eighth parameter is the subversion number of the submission, e.g. 03.
LLVM_SUBMIT_SUBVERSION="$8"

# The nineth parameter is a yes/no that indicates whether assertions should be
# enabled in the LLVM libs/tools.
LLVM_ASSERTIONS="$9"

# The current working directory is where the build will happen. It may already
# contain a partial result of an interrupted build, in which case this script
# will continue where it left off.
DIR=`pwd`

DARWIN_VERS=`uname -r | sed 's/\..*//'`
echo DARWIN_VERS = $DARWIN_VERS

# If the user has CC set in their environment unset it now
unset CC

# The B&I build srcript (~rc/bin/buildit) accepts an '-othercflags' command-line
# flag, and captures the argument to that flag in $RC_NONARCH_CFLAGS (and
# mysteriously prepends '-pipe' thereto). We will allow this to override the
# default $CFLAGS and $CXXFLAGS.

if [ "x$LLVM_DEBUG" == "x" ]; then
    CFLAGS="-g -O2 ${RC_NONARCH_CFLAGS/-pipe/}"
    OPTIMIZE_OPTS="ENABLE_OPTIMIZED=1"
else
    CFLAGS="-g"
    OPTIMIZE_OPTS=
fi

################################################################################
# Run the build.

# Create the source tree we'll actually use to build, deleting
# tcl since it doesn't actually build properly in a cross environment
# and we don't really need it.
SRC_DIR=$DIR/src
rm -rf $SRC_DIR || exit 1
mkdir $SRC_DIR || exit 1
ln -s $ORIG_SRC_DIR/* $SRC_DIR/ || exit 1

# Build the LLVM tree universal.
mkdir -p $DIR/obj-llvm || exit 1
cd $DIR/obj-llvm || exit 1

if [ \! -f Makefile.config ]; then
    $SRC_DIR/llvm/configure --prefix=$DEST_DIR$DEST_ROOT \
        --enable-targets=x86,powerpc --enable-assertions=$LLVM_ASSERTIONS \
        || exit 1
fi

if [ "x$LLVM_SUBMIT_SUBVERSION" = "x00" -o "x$LLVM_SUBMIT_SUBVERSION" = "x0" ]; then
    LLVM_VERSION="$LLVM_SUBMIT_VERSION"
else
    LLVM_VERSION="$LLVM_SUBMIT_VERSION-$LLVM_SUBMIT_SUBVERSION"
fi

# Note: Don't pass -jN here.  Building universal already has parallelism and we
# don't want to make the builders hit swap by firing off too many gcc's at the
# same time.
make $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$TARGETS" \
    CXXFLAGS="-DLLVM_VERSION_INFO='\" Apple Build #$LLVM_VERSION\"'"

if ! test $? == 0 ; then
    echo "error: LLVM 'make' failed!"
    exit 1
fi 

################################################################################
# Construct the actual destination root, by copying stuff from $DIR/dst-* to
# $DEST_DIR, with occasional 'lipo' commands.

cd $DEST_DIR || exit 1

# Clean out DEST_DIR in case -noclean was passed to buildit.
rm -rf * || exit 1

cd $DIR/obj-llvm || exit 1

# Install the tree into the destination directory.
make $LOCAL_MAKEFLAGS $OPTIMIZE_OPTS UNIVERSAL=1 OPTIMIZE_OPTION='-O2' install

if ! test $? == 0 ; then
    echo "error: LLVM 'make install' failed!"
    exit 1
fi 

# Install Version.h
if [ "x$LLVM_SUBMIT_SUBVERSION" = "x00" -o "x$LLVM_SUBMIT_SUBVERSION" = "x0" ]; then
    RC_ProjectSourceSubversion=0
else
    case "$LLVM_SUBMIT_SUBVERSION" in
        01) RC_ProjectSourceSubversion=1 ;;
        02) RC_ProjectSourceSubversion=2 ;;
        03) RC_ProjectSourceSubversion=3 ;;
        04) RC_ProjectSourceSubversion=4 ;;
        05) RC_ProjectSourceSubversion=5 ;;
        06) RC_ProjectSourceSubversion=6 ;;
        07) RC_ProjectSourceSubversion=7 ;;
        08) RC_ProjectSourceSubversion=8 ;;
        09) RC_ProjectSourceSubversion=9 ;;
        *)  RC_ProjectSourceSubversion=$LLVM_SUBMIT_SUBVERSION ;;
    esac
fi

echo "#define LLVM_VERSION ${RC_ProjectSourceVersion}" > $DEST_DIR$DEST_ROOT/include/llvm/Version.h
echo "#define LLVM_MINOR_VERSION ${RC_ProjectSourceSubversion}" >> $DEST_DIR$DEST_ROOT/include/llvm/Version.h

# Strip local symbols from llvm libraries.
strip -S $DEST_DIR$DEST_ROOT/lib/*.[oa]
strip -Sx $DEST_DIR$DEST_ROOT/lib/*.so

# Remove .dir files 
cd $DEST_DIR$DEST_ROOT
rm bin/.dir etc/llvm/.dir lib/.dir

# Remove PPC64 fat slices.
cd $DEST_DIR$DEST_ROOT/bin

if [ $MACOSX_DEPLOYMENT_TARGET = "10.4" ]; then
    find . -perm 755 -type f -exec lipo -extract ppc -extract i386 {} -output {} \;
else
    find . -perm 755 -type f -exec lipo -extract ppc7400 -extract i386 {} -output {} \;
fi

cd $DEST_DIR$DEST_ROOT
lipo -extract ppc -extract i386 lib/LLVMlto.0.0.0.so -output lib/LLVMlto.0.0.0.so

# LTO is part of developer tools
LTO_HOME=$DEST_DIR//Developer/usr
if [ "x$DEVELOPER_BIN" != "x" ]; then
LTO_HOME=$DEST_DIR/$DEVELOPER_DIR/usr
fi

mkdir -p $LTO_HOME/lib
mv lib/LLVMlto* $LTO_HOME/lib/.
mkdir -p $LTO_HOME/include/llvm
mv $DEST_DIR/usr/local/include/llvm/LinkTimeOptimizer.h $LTO_HOME/include/llvm/.

################################################################################
# Create SYM_DIR with information required for debugging.

# Figure out how many make processes to run.
SYSCTL=`sysctl -n hw.activecpu`

# hw.activecpu only available in 10.2.6 and later
if [ -z "$SYSCTL" ]; then
  SYSCTL=`sysctl -n hw.ncpu`
fi

# sysctl -n hw.* does not work when invoked via B&I chroot /BuildRoot. Builders
# can default to 2, since even if they are single processor, nothing else is
# running on the machine.
if [ -z "$SYSCTL" ]; then
  SYSCTL=2
fi

cd $SYM_DIR || exit 1

# Clean out SYM_DIR in case -noclean was passed to buildit.
rm -rf * || exit 1

# Generate .dSYM files
find $DEST_DIR -perm -0111 -type f -print | xargs -n 1 -P ${SYSCTL} dsymutil

# Save .dSYM files and .a archives
cd $DEST_DIR || exit 1
find . \( -path \*.dSYM/\* -or -name \*.a \) -print \
    | cpio -pdml $SYM_DIR || exit 1

# Save source files.
mkdir $SYM_DIR/src || exit 1
cd $DIR || exit 1
find obj-* -name \*.\[chy\] -o -name \*.cpp -print \
    | cpio -pdml $SYM_DIR/src || exit 1

################################################################################
# Remove debugging information from DEST_DIR.

find $DEST_DIR -name \*.a -print | xargs ranlib || exit 1
find $DEST_DIR -name \*.dSYM -print | xargs rm -r || exit 1
chgrp -h -R wheel $DEST_DIR
chgrp -R wheel $DEST_DIR

################################################################################
# w00t! Done!

exit 0
