#!/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.
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.
# FIXME: The list of targets is currently hard-coded and TARGETS is not used.
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 ninth parameter is a yes/no that indicates whether libLTO.dylib
# should be installed.
INSTALL_LIBLTO="$9"

# A yes/no parameter that controls whether to cross-build for an ARM host.
ARM_HOSTED_BUILD="${10}"

# The version number of the submission, e.g. 1007.
LLVM_SUBMIT_VERSION="${11}"

# The subversion number of the submission, e.g. 03.
LLVM_SUBMIT_SUBVERSION="${12}"

# 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

################################################################################
# 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
# We can't use the top-level Makefile as-is.  Remove the soft link:
rm $SRC_DIR/Makefile || exit 1
# Now create our own by editing the top-level Makefile, deleting every line marked "Apple-style":
sed -e '/[Aa]pple-style/d' -e '/include.*GNUmakefile/d' $ORIG_SRC_DIR/Makefile > $SRC_DIR/Makefile || exit 1

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

if [ "$ARM_HOSTED_BUILD" = yes ]; then
  # The cross-tools' build process expects to find an existing cross toolchain
  # under names like 'arm-apple-darwin$DARWIN_VERS-as'; so make them.
  rm -rf $DIR/bin || exit 1
  mkdir $DIR/bin || exit 1
  for prog in ar nm ranlib strip lipo ld as ; do
    P=$DIR/bin/arm-apple-darwin$DARWIN_VERS-${prog}
    T=`xcrun -sdk $SDKROOT -find ${prog}`
    echo '#!/bin/sh' > $P || exit 1
    echo 'exec '$T' "$@"' >> $P || exit 1
    chmod a+x $P || exit 1
  done
  # Try to use the platform llvm-gcc. Fall back to gcc if it's not available.
  for prog in gcc g++ ; do
    P=$DIR/bin/arm-apple-darwin$DARWIN_VERS-${prog}
    T=`xcrun -find llvm-${prog}`
    if [ "x$T" = "x" ] ; then
      T=`xcrun -sdk $SDKROOT -find ${prog}`
    fi
    echo '#!/bin/sh' > $P || exit 1
    echo 'exec '$T' -arch armv6 -isysroot '${SDKROOT}' "$@"' >> $P || exit 1
    chmod a+x $P || exit 1
  done

  PATH=$DIR/bin:$PATH
# otherwise, try to use llvm-gcc if it's available
elif [ $DARWIN_VERS -gt 9 ]; then
  # If the user has set CC or CXX, respect their wishes.  If not,
  # compile with LLVM-GCC/LLVM-G++ if available; if LLVM is not
  # available, fall back to usual GCC/G++ default.
  savedPATH=$PATH ; PATH="/Developer/usr/bin:$PATH"
  XTMPCC=$(which llvm-gcc)
  if [ x$CC  = x -a x$XTMPCC != x ] ; then export CC=$XTMPCC  ; fi
  XTMPCC=$(which llvm-g++)
  if [ x$CXX = x -a x$XTMPCC != x ] ; then export CXX=$XTMPCC ; fi
  PATH=$savedPATH
  unset XTMPCC savedPATH
fi

if [ "$ARM_HOSTED_BUILD" = yes ]; then
  configure_opts="--enable-targets=arm --host=arm-apple-darwin10 \
                  --target=arm-apple-darwin10 --build=i686-apple-darwin10"
else
  configure_opts="--enable-targets=arm,x86,powerpc,cbe"
fi

if [ \! -f Makefile.config ]; then
  $SRC_DIR/configure --prefix=$DEST_DIR$DEST_ROOT $configure_opts \
    --enable-assertions=$LLVM_ASSERTIONS \
    --enable-optimized=$LLVM_OPTIMIZED \
    --disable-bindings \
    || exit 1
fi

SUBVERSION=`echo $RC_ProjectSourceVersion | sed -e 's/[^.]*\.\([0-9]*\).*/\1/'`

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 $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$HOSTS" \
    UNIVERSAL_SDK_PATH=$SDKROOT \
    NO_RUNTIME_LIBS=1 \
    DISABLE_EDIS=1 \
    DEBUG_SYMBOLS=1 \
    LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
    LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
    CXXFLAGS="-DLLVM_VERSION_INFO='\" Apple Build #$LLVM_VERSION\"'" \
    VERBOSE=1

if [ $? != 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 $OPTIMIZE_OPTS UNIVERSAL=1 UNIVERSAL_ARCH="$HOSTS" \
    NO_RUNTIME_LIBS=1 \
    DISABLE_EDIS=1 \
    DEBUG_SYMBOLS=1 \
    LLVM_SUBMIT_VERSION=$LLVM_SUBMIT_VERSION \
    LLVM_SUBMIT_SUBVERSION=$LLVM_SUBMIT_SUBVERSION \
    OPTIMIZE_OPTION='-O3' VERBOSE=1 install

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

# Install Version.h
LLVM_MINOR_VERSION=`echo $LLVM_SUBMIT_SUBVERSION | sed -e 's,0*\([1-9][0-9]*\),\1,'`
if [ "x$LLVM_MINOR_VERSION" = "x" ]; then
    LLVM_MINOR_VERSION=0
fi
RC_ProjectSourceSubversion=`printf "%d" $LLVM_MINOR_VERSION`
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.
    #
    # Use '-l' to strip i386 modules. N.B. that flag doesn't work with kext or
    # PPC objects!
    strip -Sl $DEST_DIR$DEST_ROOT/lib/*.[oa]
    for f in `ls $DEST_DIR$DEST_ROOT/lib/*.so`; do
        strip -Sxl $f
    done
fi

# Copy over the tblgen utility.
cp `find $DIR -name tblgen` $DEST_DIR$DEST_ROOT/bin

# Remove .dir files 
cd $DEST_DIR$DEST_ROOT
rm -f 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 \! \( -name '*gccas' -o -name '*gccld' -o -name llvm-config \) \
        -exec lipo -extract ppc -extract i386 {} -output {} \;
elif [ $MACOSX_DEPLOYMENT_TARGET = "10.5" ]; then
    find . -perm 755 -type f \! \( -name '*gccas' -o -name '*gccld' -o -name llvm-config \) \
        -exec lipo -extract ppc7400 -extract i386 {} -output {} \;
else
    find . -perm 755 -type f \! \( -name '*gccas' -o -name '*gccld' -o -name llvm-config \) \
        -exec lipo -extract ppc7400 -extract i386 -extract x86_64 {} -output {} \;
fi

# The Hello dylib is an example of how to build a pass. No need to install it.
rm $DEST_DIR$DEST_ROOT/lib/LLVMHello.dylib

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

################################################################################
# Install and strip libLTO.dylib

cd $DEST_DIR$DEST_ROOT
if [ "$INSTALL_LIBLTO" = "yes" ]; then
  DT_HOME="$DEST_DIR/Developer/usr"
  mkdir -p $DT_HOME/lib
  mv lib/libLTO.dylib $DT_HOME/lib/libLTO.dylib

  # Use '-l' to strip i386 modules. N.B. that flag doesn't work with kext or
  # PPC objects!
  strip -arch all -Sl $DT_HOME/lib/libLTO.dylib
else
  rm -f lib/libLTO.dylib
fi
rm -f lib/libLTO.a lib/libLTO.la

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

cd $DIR || exit 1

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

# Strip debugging information from files
#
# Use '-l' to strip i386 modules. N.B. that flag doesn't work with kext or
# PPC objects!
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} strip -arch all -Sl

chgrp -h -R wheel $DEST_DIR
chgrp -R wheel $DEST_DIR

################################################################################
# Remove the docs directory

rm -rf $DEST_DIR$DEST_ROOT/docs

################################################################################
# symlinks so that B&I can find things

if [ "$INSTALL_LIBLTO" = "yes" ]; then
  mkdir -p $DEST_DIR/usr/lib/
  cd $DEST_DIR/usr/lib && \
    ln -s ../../Developer/usr/lib/libLTO.dylib ./libLTO.dylib
fi

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

exit 0