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openwrt-xburst/scripts/ext-toolchain.sh
jow 5a89e8c08e [scripts] ext-toolchain.sh: rework generated gcc wrapper 
Only append -L and -Wl,-rpath-link flags if the command line contains -l, -L, -shared or -static flags;
this is needed to suppress "-rpath-link: linker input file unused because linking not done" on each cc invocation.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29946 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-01-29 18:53:12 +00:00

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#!/usr/bin/env bash
#
# Script for various external toolchain tasks, refer to
# the --help output for more information.
#
# Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
CC=""
CXX=""
CPP=""
CFLAGS=""
TOOLCHAIN="."
LIBC_TYPE=""
# Library specs
LIB_SPECS="
c: ld-* lib{anl,c,cidn,crypt,dl,m,nsl,nss_dns,nss_files,resolv,util}
rt: librt-* librt
pthread: libpthread-* libpthread
stdcpp: libstdc++
gcc: libgcc_s
ssp: libssp
gfortran: libgfortran
"
# Binary specs
BIN_SPECS="
ldd: ldd
ldconfig: ldconfig
gdb: gdb
gdbserver: gdbserver
"
test_c() {
cat <<-EOT | "${CC:-false}" $CFLAGS -o /dev/null -x c - 2>/dev/null
#include <stdio.h>
int main(int argc, char **argv)
{
printf("Hello, world!\n");
return 0;
}
EOT
}
test_cxx() {
cat <<-EOT | "${CXX:-false}" $CFLAGS -o /dev/null -x c++ - 2>/dev/null
#include <iostream>
using namespace std;
int main()
{
cout << "Hello, world!" << endl;
return 0;
}
EOT
}
test_softfloat() {
cat <<-EOT | "$CC" $CFLAGS -msoft-float -o /dev/null -x c - 2>/dev/null
int main(int argc, char **argv)
{
double a = 0.1;
double b = 0.2;
double c = (a + b) / (a * b);
return 1;
}
EOT
}
test_uclibc() {
local sysroot="$("$CC" $CFLAGS -print-sysroot 2>/dev/null)"
if [ -d "${sysroot:-$TOOLCHAIN}" ]; then
local lib
for lib in "${sysroot:-$TOOLCHAIN}"/{lib,usr/lib,usr/local/lib}/ld-uClibc*.so*; do
if [ -f "$lib" ] && [ ! -h "$lib" ]; then
return 0
fi
done
fi
return 1
}
test_feature() {
local feature="$1"; shift
# find compilers, libc type
probe_cc
probe_cxx
probe_libc
# common toolchain feature tests
case "$feature" in
c) test_c; return $? ;;
c++) test_cxx; return $? ;;
soft*) test_softfloat; return $? ;;
esac
# assume eglibc/glibc supports all libc features
if [ "$LIBC_TYPE" != "uclibc" ]; then
return 0
fi
# uclibc feature tests
local inc
local sysroot="$("$CC" "$@" -muclibc -print-sysroot 2>/dev/null)"
for inc in "include" "usr/include" "usr/local/include"; do
local conf="${sysroot:-$TOOLCHAIN}/$inc/bits/uClibc_config.h"
if [ -f "$conf" ]; then
case "$feature" in
lfs) grep -q '__UCLIBC_HAS_LFS__ 1' "$conf"; return $?;;
ipv6) grep -q '__UCLIBC_HAS_IPV6__ 1' "$conf"; return $?;;
rpc) grep -q '__UCLIBC_HAS_RPC__ 1' "$conf"; return $?;;
locale) grep -q '__UCLIBC_HAS_LOCALE__ 1' "$conf"; return $?;;
wchar) grep -q '__UCLIBC_HAS_WCHAR__ 1' "$conf"; return $?;;
threads) grep -q '__UCLIBC_HAS_THREADS__ 1' "$conf"; return $?;;
esac
fi
done
return 1
}
find_libs() {
local spec="$(echo "$LIB_SPECS" | sed -ne "s#^[[:space:]]*$1:##ip")"
if [ -n "$spec" ] && probe_cpp; then
local libdir libdirs
for libdir in $(
"$CPP" $CFLAGS -v -x c /dev/null 2>&1 | \
sed -ne 's#:# #g; s#^LIBRARY_PATH=##p'
); do
if [ -d "$libdir" ]; then
libdirs="$libdirs $(cd "$libdir"; pwd)/"
fi
done
local pattern
for pattern in $(eval echo $spec); do
find $libdirs -name "$pattern.so*" | sort -u
done
return 0
fi
return 1
}
find_bins() {
local spec="$(echo "$BIN_SPECS" | sed -ne "s#^[[:space:]]*$1:##ip")"
if [ -n "$spec" ] && probe_cpp; then
local sysroot="$("$CPP" -print-sysroot)"
local bindir bindirs
for bindir in $(
echo "${sysroot:-$TOOLCHAIN}/bin";
echo "${sysroot:-$TOOLCHAIN}/usr/bin";
echo "${sysroot:-$TOOLCHAIN}/usr/local/bin";
"$CPP" $CFLAGS -v -x c /dev/null 2>&1 | \
sed -ne 's#:# #g; s#^COMPILER_PATH=##p'
); do
if [ -d "$bindir" ]; then
bindirs="$bindirs $(cd "$bindir"; pwd)/"
fi
done
local pattern
for pattern in $(eval echo $spec); do
find $bindirs -name "$pattern" | sort -u
done
return 0
fi
return 1
}
wrap_bin_cc() {
local out="$1"
local bin="$2"
echo '#!/bin/sh' > "$out"
echo 'for arg in "$@"; do' >> "$out"
echo ' case "$arg" in -l*|-L*|-shared|-static)' >> "$out"
echo -n ' exec "'"$bin"'" '"$CFLAGS"' ${STAGING_DIR:+' >> "$out"
echo -n '-idirafter "$STAGING_DIR/usr/include" ' >> "$out"
echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
echo '-Wl,-rpath-link,"$STAGING_DIR/usr/lib"} "$@" ;;' >> "$out"
echo ' esac' >> "$out"
echo 'done' >> "$out"
echo -n 'exec "'"$bin"'" '"$CFLAGS"' ${STAGING_DIR:+' >> "$out"
echo '-idirafter "$STAGING_DIR/usr/include"} "$@"' >> "$out"
chmod +x "$out"
}
wrap_bin_ld() {
local out="$1"
local bin="$2"
echo '#!/bin/sh' > "$out"
echo -n 'exec "'"$bin"'" '"$CFLAGS"' ${STAGING_DIR:+' >> "$out"
echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
echo '-rpath-link "$STAGING_DIR/usr/lib"} "$@"' >> "$out"
chmod +x "$out"
}
wrap_bin_other() {
local out="$1"
local bin="$2"
echo '#!/bin/sh' > "$out"
echo 'exec "'"$bin"'" "$@"' >> "$out"
chmod +x "$out"
}
wrap_bins() {
if probe_cc; then
mkdir -p "$1" || return 1
local cmd
for cmd in "${CC%-*}-"*; do
if [ -x "$cmd" ]; then
local out="$1/${cmd##*/}"
local bin="$cmd"
if [ -x "$out" ] && ! grep -q STAGING_DIR "$out"; then
mv "$out" "$out.bin"
bin='$(dirname "$0")/'"${out##*/}"'.bin'
fi
case "${cmd##*/}" in
*-*cc|*-*cc-*|*-*++|*-*++-*|*-cpp)
wrap_bin_cc "$out" "$bin"
;;
*-ld)
wrap_bin_ld "$out" "$bin"
;;
*)
wrap_bin_other "$out" "$bin"
;;
esac
fi
done
return 0
fi
return 1
}
print_config() {
local mktarget="$1"
local mksubtarget
local target="$("$CC" $CFLAGS -dumpmachine)"
local cpuarch="${target%%-*}"
local prefix="${CC##*/}"; prefix="${prefix%-*}-"
local config="${0%/scripts/*}/.config"
# if no target specified, print choice list and exit
if [ -z "$mktarget" ]; then
# prepare metadata
if [ ! -f "${0%/scripts/*}/tmp/.targetinfo" ]; then
"${0%/*}/scripts/config/mconf" prepare-tmpinfo
fi
local mktargets=$(
sed -ne "
/^Target: / { h };
/^Target-Arch: $cpuarch\$/ { x; s#^Target: ##p }
" "${0%/scripts/*}/tmp/.targetinfo" | sort -u
)
for mktarget in $mktargets; do
case "$mktarget" in */*)
mktargets=$(echo "$mktargets" | sed -e "/^${mktarget%/*}\$/d")
esac
done
if [ -n "$mktargets" ]; then
echo "Available targets:" >&2
echo $mktargets >&2
else
echo -e "Could not find a suitable OpenWrt target for " >&2
echo -e "CPU architecture '$cpuarch' - you need to " >&2
echo -e "define one first!" >&2
fi
return 1
fi
# bail out if there is a .config already
if [ -f "${0%/scripts/*}/.config" ]; then
echo "There already is a .config file, refusing to overwrite!" >&2
return 1
fi
case "$mktarget" in */*)
mksubtarget="${mktarget#*/}"
mktarget="${mktarget%/*}"
;; esac
echo "CONFIG_TARGET_${mktarget}=y" > "$config"
if [ -n "$mksubtarget" ]; then
echo "CONFIG_TARGET_${mktarget}_${mksubtarget}=y" >> "$config"
fi
if test_feature "softfloat"; then
echo "CONFIG_SOFT_FLOAT=y" >> "$config"
else
echo "# CONFIG_SOFT_FLOAT is not set" >> "$config"
fi
if test_feature "ipv6"; then
echo "CONFIG_IPV6=y" >> "$config"
else
echo "# CONFIG_IPV6 is not set" >> "$config"
fi
if test_feature "locale"; then
echo "CONFIG_BUILD_NLS=y" >> "$config"
else
echo "# CONFIG_BUILD_NLS is not set" >> "$config"
fi
echo "CONFIG_DEVEL=y" >> "$config"
echo "CONFIG_EXTERNAL_TOOLCHAIN=y" >> "$config"
echo "CONFIG_TOOLCHAIN_ROOT=\"$TOOLCHAIN\"" >> "$config"
echo "CONFIG_TOOLCHAIN_PREFIX=\"$prefix\"" >> "$config"
echo "CONFIG_TARGET_NAME=\"$target\"" >> "$config"
local lib
for lib in C RT PTHREAD GCC STDCPP SSP GFORTRAN; do
local file
local spec=""
local llib="$(echo "$lib" | sed -e 's#.*#\L&#')"
for file in $(find_libs "$lib"); do
spec="${spec:+$spec }$(echo "$file" | sed -e "s#^$TOOLCHAIN#.#")"
done
if [ -n "$spec" ]; then
echo "CONFIG_PACKAGE_lib${llib}=y" >> "$config"
echo "CONFIG_LIB${lib}_FILE_SPEC=\"$spec\"" >> "$config"
else
echo "# CONFIG_PACKAGE_lib${llib} is not set" >> "$config"
fi
done
local bin
for bin in LDD LDCONFIG; do
local file
local spec=""
local lbin="$(echo "$bin" | sed -e 's#.*#\L&#')"
for file in $(find_bins "$bin"); do
spec="${spec:+$spec }$(echo "$file" | sed -e "s#^$TOOLCHAIN#.#")"
done
if [ -n "$spec" ]; then
echo "CONFIG_PACKAGE_${lbin}=y" >> "$config"
echo "CONFIG_${bin}_FILE_SPEC=\"$spec\"" >> "$config"
else
echo "# CONFIG_PACKAGE_${lbin} is not set" >> "$config"
fi
done
# inflate
make -C "${0%/scripts/*}" defconfig
return 0
}
probe_cc() {
if [ -z "$CC" ]; then
local bin
for bin in "bin" "usr/bin" "usr/local/bin"; do
local cmd
for cmd in "$TOOLCHAIN/$bin/"*-*cc*; do
if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
CC="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
return 0
fi
done
done
return 1
fi
return 0
}
probe_cxx() {
if [ -z "$CXX" ]; then
local bin
for bin in "bin" "usr/bin" "usr/local/bin"; do
local cmd
for cmd in "$TOOLCHAIN/$bin/"*-*++*; do
if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
CXX="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
return 0
fi
done
done
return 1
fi
return 0
}
probe_cpp() {
if [ -z "$CPP" ]; then
local bin
for bin in "bin" "usr/bin" "usr/local/bin"; do
local cmd
for cmd in "$TOOLCHAIN/$bin/"*-cpp*; do
if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
CPP="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
return 0
fi
done
done
return 1
fi
return 0
}
probe_libc() {
if [ -z "$LIBC_TYPE" ]; then
if test_uclibc; then
LIBC_TYPE="uclibc"
else
LIBC_TYPE="glibc"
fi
fi
return 0
}
while [ -n "$1" ]; do
arg="$1"; shift
case "$arg" in
--toolchain)
[ -d "$1" ] || {
echo "Toolchain directory '$1' does not exist." >&2
exit 1
}
TOOLCHAIN="$(cd "$1"; pwd)"; shift
;;
--cflags)
CFLAGS="${CFLAGS:+$CFLAGS }$1"; shift
;;
--print-libc)
if probe_cc; then
probe_libc
echo "$LIBC_TYPE"
exit 0
fi
echo "No C compiler found in '$TOOLCHAIN'." >&2
exit 1
;;
--print-target)
if probe_cc; then
exec "$CC" $CFLAGS -dumpmachine
fi
echo "No C compiler found in '$TOOLCHAIN'." >&2
exit 1
;;
--print-bin)
if [ -z "$1" ]; then
echo "Available programs:" >&2
echo $(echo "$BIN_SPECS" | sed -ne 's#:.*$##p') >&2
exit 1
fi
find_bins "$1" || exec "$0" --toolchain "$TOOLCHAIN" --print-bin
exit 0
;;
--print-libs)
if [ -z "$1" ]; then
echo "Available libraries:" >&2
echo $(echo "$LIB_SPECS" | sed -ne 's#:.*$##p') >&2
exit 1
fi
find_libs "$1" || exec "$0" --toolchain "$TOOLCHAIN" --print-libs
exit 0
;;
--test)
test_feature "$1"
exit $?
;;
--wrap)
[ -n "$1" ] || exec "$0" --help
wrap_bins "$1"
exit $?
;;
--config)
if probe_cc; then
print_config "$1"
exit $?
fi
echo "No C compiler found in '$TOOLCHAIN'." >&2
exit 1
;;
-h|--help)
me="$(basename "$0")"
echo -e "\nUsage:\n" >&2
echo -e " $me --toolchain {directory} --print-libc" >&2
echo -e " Print the libc implementation and exit.\n" >&2
echo -e " $me --toolchain {directory} --print-target" >&2
echo -e " Print the GNU target name and exit.\n" >&2
echo -e " $me --toolchain {directory} --print-bin {program}" >&2
echo -e " Print executables belonging to given program," >&2
echo -e " omit program argument to get a list of names.\n" >&2
echo -e " $me --toolchain {directory} --print-libs {library}" >&2
echo -e " Print shared objects belonging to given library," >&2
echo -e " omit library argument to get a list of names.\n" >&2
echo -e " $me --toolchain {directory} --test {feature}" >&2
echo -e " Test given feature, exit code indicates success." >&2
echo -e " Possible features are 'c', 'c++', 'softfloat'," >&2
echo -e " 'lfs', 'rpc', 'ipv6', 'wchar', 'locale' and " >&2
echo -e " 'threads'.\n" >&2
echo -e " $me --toolchain {directory} --wrap {directory}" >&2
echo -e " Create wrapper scripts for C and C++ compiler, " >&2
echo -e " linker, assembler and other key executables in " >&2
echo -e " the directory given with --wrap.\n" >&2
echo -e " $me --toolchain {directory} --config {target}" >&2
echo -e " Analyze the given toolchain and print a suitable" >&2
echo -e " .config for the given target. Omit target " >&2
echo -e " argument to get a list of names.\n" >&2
echo -e " $me --help" >&2
echo -e " Display this help text and exit.\n\n" >&2
echo -e " Most commands also take a --cflags parameter which " >&2
echo -e " is used to specify C flags to be passed to the " >&2
echo -e " cross compiler when performing tests." >&2
echo -e " This paremter may be repeated multiple times." >&2
exit 1
;;
*)
echo "Unknown argument '$arg'" >&2
exec $0 --help
;;
esac
done
exec $0 --help
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