# This software is released under the terms of GPLv2 by copyright@mzpqnxow.com
# Please see LICENSE or LICENSE.md for more information on GPLv2

# This is not for you if you are not using a musl-cross-make toolchain
# This is a productivity script that should be sourced from a Bash shell
#
# It is meant to be used after making and installing a musl toolchain using
# the excellent musl-cross-make tool by Rich Felker:
#
#	https://github.com/richfelker/musl-cross-make
#
# This file should be placed in /path/to/installed/toolchain/
# You should probably call it activate, but it doesn't matter
# All you need to do is source it (from anywhere) and it sets your env up for
# building software via build systems like configure or just via gcc/g++/as/ld
# commands. It helps with static linking by setting some static library paths
# also (See the XXX_STATIC variables)
#
# It makes assumptions and will try to set things up for you so you can
# conveniently build things with or without ./configure based build systems
#

CURDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
TOOLCHAIN_TARGET="$(basename $(echo $CURDIR/*-*-musl*))"
TOOLCHAIN_ROOT="$CURDIR"

# Commonly used/needed static libraries, put them in the
# environment for easy access
UTIL_STATIC=$(find $(realpath $CURDIR) -name libutil.a)
C_STATIC=$(find $(realpath $CURDIR) -name libc.a)
DL_STATIC=$(find $(realpath $CURDIR) -name libdl.a)
PTHREAD_STATIC=$(find $(realpath $CURDIR) -name libpthread.a)
STDCXX_STATIC=$(find $(realpath $CURDIR) -name libstdc++.a)
GCCEH_STATIC=$(find $(realpath $CURDIR) -name libgcc_eh.a)

TOOLCHAIN_BIN="$TOOLCHAIN_ROOT/bin"

echo "--- Build environment setup ---"
echo
echo "TOOLCHAIN_TARGET: $TOOLCHAIN_TARGET"
echo "TOOLCHAIN_BIN: $TOOLCHAIN_BIN"
echo
for TOOL in gcc \
			addr2line \
			ar \
			as \
			c++ \
			cpp \
			g++ \
			ld \
			nm \
			objdump \
			ranlib \
			strip
do
    echo "  Symlinking $TOOL"
    ln -sf "$TOOLCHAIN_BIN/$TOOLCHAIN_TARGET-$TOOL" "$TOOLCHAIN_BIN/$TOOL"
done
ln -sf "${TOOLCHAIN_BIN}/${TOOLCHAIN_TARGET}-gcc" "${TOOLCHAIN_BIN}/cc"
echo
export PATH="$TOOLCHAIN_BIN":"$PATH"
echo "TOOLCHAIN_TARGET: 	$TOOLCHAIN_TARGET"
echo "TOOLCHAIN_ROOT:	$TOOLCHAIN_ROOT"
echo "TOOLCHAIN_BIN: 	$TOOLCHAIN_BIN"
echo
echo "GCC location: $(which gcc)"
echo "GAS location: $(which as)"
echo "GLD location: $(which ld)"
echo "G++ location: $(which g++)"
echo "CC location:  $(which cc)"
echo
echo "UTIL_STATIC:      $UTIL_STATIC"
echo "C_STATIC:         $C_STATIC"
echo "DL_STATIC:        $DL_STATIC"
echo "PTHREAD_STATIC:   $PTHREAD_STATIC"
echo "STDCXX_STATIC:    $STDCXX_STATIC"
echo "GCCEH_STATIC:     $GCCEH_STATIC"


alias cross_configure="./configure \
	--host=$TOOLCHAIN_TARGET \
	--prefix=$TOOLCHAIN_ROOT"

echo
echo "Use cross_configure to invoke alias for:"
echo "  $./configure --host=$TOOLCHAIN_TARGET --prefix=$TOOLCHAIN_ROOT"
echo
export UTIL_STATIC
export C_STATIC
export DL_STATIC
export PTHREAD_STATIC
export STDCXX_STATIC
export GCCEH_STATIC
export TOOLCHAIN_TARGET
export TOOLCHAIN_ROOT
export TOOLCHAIN_BIN