#!/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 a yes/no that indicates whether assertions should be
# enabled in the LLVM libs/tools.
LLVM_ASSERTIONS="$7"

# The eighth parameter is a yes/no that indicates whether this is an optimized
# build.
LLVM_OPTIMIZED="$8"

# The nineth parameter is the version number of the submission, e.g. 1007.
LLVM_SUBMIT_VERSION="$9"

# The tenth parameter is the subversion number of the submission, e.g. 03.
LLVM_SUBMIT_SUBVERSION="${10}"

# 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

DT_HOME=$DEST_DIR/Developer/usr
DEST_ROOT="/Developer$DEST_ROOT"
if [ "x$DEVELOPER_BIN" != "x" ]; then
    DT_HOME=$DEST_DIR/$DEVELOPER_DIR/usr
    DEST_ROOT="/$DEVELOPER_DIR$DEST_ROOT"
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
    $SRC_DIR/llvm/configure --prefix=$DT_HOME/local \
        --enable-targets=arm,x86,powerpc,cbe \
        --enable-assertions=$LLVM_ASSERTIONS \
        --enable-optimized=$LLVM_OPTIMIZED \
        || exit 1
fi

SUBVERSION=`echo $RC_ProjectSourceVersion | sed -e 's/.*\.//'`

if [ "x$SUBVERSION" != "x$RC_ProjectSourceVersion" ]; then
    LLVM_SUBMIT_SUBVERSION=`printf "%02d" $SUBVERSION`
    RC_ProjectSourceVersion=`echo $RC_ProjectSourceVersion | sed -e 's/\..*//'`
    LLVM_SUBMIT_VERSION=$RC_ProjectSourceVersion
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

GCC_VER=`cc --version 2>/dev/null | sed 1q`

if echo "$GCC_VER" | grep GCC > /dev/null; then
    GCC_VER=`echo $GCC_VER | sed -e 's/.*(GCC) \([0-9.][0-9.]*\).*/\1/'`
    MAJ_VER=`echo $GCC_VER | sed 's/\..*//'`
    MIN_VER=`echo $GCC_VER | sed 's/[^.]*\.\([0-9]*\).*/\1/'`
fi

JOBS_FLAG=""

# Note: If compiling with GCC 4.0, don't pass the -jN flag. Building universal
# already has parallelism and we don't want to make the builders hit swap by
# firing off too many gccs at the same time.
if [ "x$MAJ_VER" != "x4" -o "x$MIN_VER" != "x0" ]; then
    # 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

    JOBS_FLAG="-j $SYSCTL"
fi

make $JOBS_FLAG $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$TARGETS" \
    LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
    LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
    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 $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$TARGETS" \
    OPTIMIZE_OPTION='-O2' install

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

# Install Version.h
RC_ProjectSourceSubversion=`printf "%d" $LLVM_SUBMIT_SUBVERSION`
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

if [ "x$LLVM_DEBUG" != "x1" ]; then
    # Strip local symbols from llvm libraries.
    strip -S $DEST_DIR$DEST_ROOT/lib/*.[oa]
    strip -Sx $DEST_DIR$DEST_ROOT/lib/*.so
fi

# 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 {} \;
elif [ $MACOSX_DEPLOYMENT_TARGET = "10.5" ]; then
    find . -perm 755 -type f -exec lipo -extract ppc7400 -extract i386 {} -output {} \;
else
    find . -perm 755 -type f -exec lipo -extract ppc7400 -extract i386 -extract x86_64 {} -output {} \;
fi

cd $DEST_DIR$DEST_ROOT
mkdir -p $DT_HOME/lib
mv lib/libLTO.dylib $DT_HOME/lib/libLTO.dylib
rm -f lib/libLTO.a lib/libLTO.la

# Compress manpages
MDIR=$DEST_DIR$DEST_ROOT/share/man/man1
gzip -f $MDIR/*

################################################################################
# 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 ! \( -name '*.la' -o -name gccas -o -name gccld -o -name llvm-config \) -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

################################################################################
# Remove tar ball from docs directory

find $DEST_DIR -name html.tar.gz -exec rm {} \;

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

exit 0