path: root/sys-devel/gcc-config/files/gcc-config-1.2.5

#!/bin/bash
# Copyright 1999-2002 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License, v2 or later
# Author:  Martin Schlemmer <azarah@gentoo.org>
# $Header: /var/cvsroot/gentoo-x86/sys-devel/gcc-config/files/gcc-config-1.2.5,v 1.1 2002/12/23 01:49:50 azarah Exp $


source /etc/init.d/functions.sh || {
	echo "$0: Could not source /etc/init.d/functions.sh!"
	exit 1
}

usage() {
cat << "USAGE_END"
Usage: gcc-config [Option] <CHOST>-<gcc version>
Options:
	[--use-old]

		Use the old profile if one was selected.
	
	[--use-portage-chost]

		Only set to given profile if its CHOST is the same as that
		set for portage in /etc/make.conf (or one of other portage
		config files...).
	
	[--get-current-profile]

		Print current used gcc profile.

	[--list-profiles]

	    Print a list of available profiles.

	[--print-environ]

	    Print environment that can be used to setup things for current
		gcc profile, or specified one ...
	
	[--get-bin-path]

		Print path where binaries of given/current profile are located.
	
	[--get-lib-path]

		Print path where libraries of given/current profile are located.

	[--get-stdcxx-incdir]

		Print path to g++ include files of given/current profile.
	

USAGE_END

	exit 1
}

if [ "$#" -lt 1 ]
then
	usage
fi

cmd_setup() {

	# Sourcing /etc/env.d/gcc/${GCC_COMP} is going to mess up
	# PATH among things...
	CP="$(find_path cp)"
	RM="$(find_path rm)"
	MV="$(find_path mv)"
	LN="$(find_path ln)"
	CAT="$(find_path cat)"
	AWK="$(find_path gawk)"
	GREP="$(find_path grep)"
	FIND="$(find_path find)"
	CHMOD="$(find_path chmod)"
	TOUCH="$(find_path touch)"
	ENV_UPDATE="$(find_path env-update)"
}

find_path() {
	[ -z "$1" ] && return 0

	for x in /bin /sbin /usr/bin /usr/sbin
	do
		if [ -x ${x}/$1 -a -r ${x}/$1 ]
		then
			echo "${x}/$1"
			break
		fi
	done
}

gen_wrapper() {
	${CAT} > $1 << END
#!/bin/sh

# This is part of sys-devel/gcc-config

CPP="\`which cpp 2> /dev/null\`"

# Setup PATH if we cannot find the cpp binary, or if the one
# we find is the wrapper script ...
if [ ! -x "\${CPP}" -o "\${CPP}" == "/usr/bin/cpp" ]
then
	PATH="\`/usr/sbin/gcc-config --get-bin-path\`:\${PATH}"
fi

$2 "\$@"
END

	${CHMOD} 0755 $1
}

GCC_COMP=""
REAL_CHOST="$(/usr/bin/python -c 'import portage; print portage.settings["CHOST"];')"

switch_profile() {
	local MY_LDPATH=""
	local GCC_PROFILES=""

	if [ "$(id -u)" -ne 0 ]
	then
		eerror "$0: Must be root."
		exit 1
	fi

	ebegin "Switching to ${GCC_COMP} compiler"

	# Sourcing /etc/env.d/gcc/${GCC_COMP} is going to mess up
	# PATH among things...
	cmd_setup

	# Order our profiles to have the default first...
	# We do this so that we can have them ordered with default
	# first in /etc/ld.so.conf, as the logical is that all
	# compilers for default CHOST will be used to compile stuff,
	# and thus we want all their lib paths in /etc/ld.so.conf ...
	GCC_PROFILES="$(${FIND} /etc/env.d/gcc/ -name "${REAL_CHOST}-*")"
	GCC_PROFILES="${GCC_PROFILES/\/etc\/env.d\/gcc\/${GCC_COMP}}"
	GCC_PROFILES="/etc/env.d/gcc/${GCC_COMP} ${GCC_PROFILES}"

	# Extract all LDPATH's for our CHOST
	for x in ${GCC_PROFILES}
	do
		if [ -f ${x} ]
		then
			source ${x}

			if [ -z "${MY_LDPATH}" ]
			then
				if [ -d ${LDPATH} ]
				then
					MY_LDPATH="${LDPATH}"
				fi
			else
				if [ -d ${LDPATH} ]
				then
					MY_LDPATH="${MY_LDPATH}:${LDPATH}"
				fi
			fi
		fi
	done

	# Setup /etc/env.d/05gcc
	${AWK} '!/STDCXX_INCDIR|LDPATH/ {print $0}' \
		/etc/env.d/gcc/${GCC_COMP} > /etc/env.d/05gcc
	echo "LDPATH=\"${MY_LDPATH}\"" >> /etc/env.d/05gcc

	source /etc/env.d/gcc/${GCC_COMP}

	# Create /lib/cpp if missing or a symlink
	if [ -L /lib/cpp -o ! -f /lib/cpp ]
	then
		${RM} -f /lib/cpp
		gen_wrapper /lib/cpp cpp
	fi
	# Make sure it are not unmerged by mistake
	${TOUCH} /lib/cpp
	# Create /usr/bin/cc if missing or a symlink
	if [ -L /usr/bin/cc -o ! -f /usr/bin/cc ]
	then
		${RM} -f /usr/bin/cc
		gen_wrapper /usr/bin/cc gcc
	fi
	# Make sure it are not unmerged by mistake
	${TOUCH} /usr/bin/cc
	# Create /usr/bin/cpp if missing or a symlink (used by XFree86 for one)
	if [ -L /usr/bin/cpp -o ! -f /usr/bin/cpp ]
	then
		${RM} -f /usr/bin/cpp
		gen_wrapper /usr/bin/cpp cpp
	fi
	# Make sure it are not unmerged by mistake
	${TOUCH} /usr/bin/cpp

	echo "CURRENT=${GCC_COMP}" > /etc/env.d/gcc/config

	source /etc/profile

	${ENV_UPDATE} &> /dev/null

	eend 0

	return 0
}

get_current_profile() {
	if [ ! -f /etc/env.d/gcc/config ]
	then
		eerror "$0:  No gcc profile is active!"
		return 1
	fi

	source /etc/env.d/gcc/config

	if [ -z "${CURRENT}" ]
	then
		eerror "$0:  No gcc profile is active!"
		return 1
	fi

	echo "${CURRENT}"

	return 0
}

list_profiles() {
	if [ ! -f /etc/env.d/gcc/config ]
	then
		eerror "$0:  No gcc profile is active!"
		return 1
	fi

	for x in /etc/env.d/gcc/*
	do
		if [ -f ${x} -a ${x} != "/etc/env.d/gcc/config" ]
		then
			echo "${x##*/}"
		fi
	done
}

print_environ() {
	local OLDPATH="${PATH}"

	source /etc/env.d/gcc/${GCC_COMP}

	echo "export PATH=\"${PATH}:${OLDPATH}\""

#	if [ -z "${LD_LIBRARY_PATH}" ]
#	then
#		echo "export LD_LIBRARY_PATH=\"${LDPATH}\""
#	else
#		echo "export LD_LIBRARY_PATH=\"${LDPATH}:${LD_LIBRARY_PATH}\""
#	fi

	echo "export CC=\"${CC}\""
	echo "export CXX=\"${CXX}\""
}

get_bin_path() {
	source /etc/env.d/gcc/${GCC_COMP}

	echo "${PATH}"

	return 0
}

get_lib_path() {
	source /etc/env.d/gcc/${GCC_COMP}

	echo "${LDPATH}"

	return 0
}

get_stdcxx_incdir() {
	source /etc/env.d/gcc/${GCC_COMP}

	echo "${LDPATH}/include/${STDCXX_INCDIR}"

	return 0
}

NEED_ACTION="yes"
DOIT="switch_profile"
CHECK_CHOST="no"

for x in $*
do
	case ${x} in
		# Only use specified compiler if one is not already selected.
		--use-old)
			if get_current_profile &> /dev/null
			then
				GCC_COMP="$(get_current_profile)"
			fi
			;;
		--use-portage-chost)
			CHECK_CHOST="yes"
			;;
		--get-current-profile)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="get_current_profile"
			fi
			;;
		--list-profiles)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="list_profiles"
			fi
			;;
		--print-environ)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="print_environ"
			fi
			;;
		--get-bin-path)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="get_bin_path"
			fi
			;;
		--get-lib-path)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="get_lib_path"
			fi
			;;
		--get-stdcxx-incdir)
			if [ "${NEED_ACTION}" = "yes" ]
			then
				NEED_ACTION="no"
				DOIT="get_stdcxx_incdir"
			fi
			;;
		*)
			if [ -z "${GCC_COMP}" ]
			then
				GCC_COMP="${x}"
			fi
			;;
	esac
done

if [ "${DOIT}" = "switch_profile" -a -z "${GCC_COMP}" ]
then
	usage
fi

if [ -z "${GCC_COMP}" ]
then
	if get_current_profile &> /dev/null
	then
		GCC_COMP="$(get_current_profile)"
	else
		usage
	fi
fi

if [ ! -d /usr/lib/gcc-lib/${GCC_COMP%-*}/${GCC_COMP##*-} -o \
     ! -f /etc/env.d/gcc/${GCC_COMP} ]
then
	usage
fi

# Chosen CHOST are not the same as the real CHOST according to make.conf,
# and --use-portage-chost option was given, so do nothing ...
if [ "${CHECK_CHOST}" = "yes" -a "${GCC_COMP%-*}" != "${REAL_CHOST}" ]
then
	exit 0
fi

eval ${DOIT}


# vim:ts=4