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[scripts] add ext-toolchain.sh, a utility for external toolchains
The ext-toolchain.sh utility script implements various external toolchain tasks: * Testing of available features, like c++, soft-float or ipv6 support * Finding the libc implementation (uclibc or eglibc/glibc) * Inferring the GNU target name * Finding shared objects for packaging (libc, libpthread, ...) * Finding executables for packaging (ldd, gdbserver, ...) * Generating wrapper scripts for toolchain commands git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29765 3c298f89-4303-0410-b956-a3cf2f4a3e73
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scripts/ext-toolchain.sh
Executable file
410
scripts/ext-toolchain.sh
Executable file
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#!/usr/bin/env bash
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# Script to copy a toolchain from given source to given
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# destination directory.
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CC=""
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CXX=""
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CPP=""
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CFLAGS=""
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TOOLCHAIN="."
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LIBC_TYPE=""
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# Library specs
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LIB_SPECS="
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c: ld-* lib{anl,c,cidn,crypt,dl,m,nsl,nss_dns,nss_files,resolv,util}
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rt: librt-* librt
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pthread: libpthread-* libpthread
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cpp: libstdc++
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gcc: libgcc_s
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ssp: libssp
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gfortran: libgfortran
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"
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# Binary specs
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BIN_SPECS="
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ldd: ldd
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ldconfig: ldconfig
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gdb: gdb
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gdbserver: gdbserver
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"
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test_c() {
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cat <<-EOT | "${CC:-false}" $CFLAGS -o /dev/null -x c - 2>/dev/null
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#include <stdio.h>
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int main(int argc, char **argv)
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{
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printf("Hello, world!\n");
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return 0;
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}
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EOT
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}
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test_cxx() {
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cat <<-EOT | "${CXX:-false}" $CFLAGS -o /dev/null -x c++ - 2>/dev/null
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#include <iostream>
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using namespace std;
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int main()
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{
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cout << "Hello, world!" << endl;
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return 0;
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}
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EOT
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}
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test_softfloat() {
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cat <<-EOT | "$CC" $CFLAGS -msoft-float -o /dev/null -x c - 2>/dev/null
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int main(int argc, char **argv)
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{
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double a = 0.1;
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double b = 0.2;
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double c = (a + b) / (a * b);
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return 1;
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}
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EOT
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}
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test_uclibc() {
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local sysroot="$("$CC" $CFLAGS -print-sysroot 2>/dev/null)"
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if [ -d "$sysroot" ]; then
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local lib
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for lib in "$sysroot"/{lib,usr/lib,usr/local/lib}/ld-uClibc*.so*; do
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if [ -f "$lib" ] && [ ! -h "$lib" ]; then
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return 0
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fi
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done
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fi
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return 1
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}
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test_feature() {
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local feature="$1"; shift
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# find compilers, libc type
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probe_cc
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probe_cxx
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probe_libc
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# common toolchain feature tests
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case "$feature" in
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c) test_c; return $? ;;
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c++) test_cxx; return $? ;;
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soft*) test_softfloat; return $? ;;
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esac
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# assume eglibc/glibc supports all libc features
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if [ "$LIBC_TYPE" != "uclibc" ]; then
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return 0
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fi
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# uclibc feature tests
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local inc
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local sysroot="$("$CC" "$@" -muclibc -print-sysroot 2>/dev/null)"
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for inc in "include" "usr/include" "usr/local/include"; do
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local conf="$sysroot/$inc/bits/uClibc_config.h"
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if [ -f "$conf" ]; then
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case "$feature" in
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lfs) grep -q '__UCLIBC_HAS_LFS__ 1' "$conf"; return $?;;
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ipv6) grep -q '__UCLIBC_HAS_IPV6__ 1' "$conf"; return $?;;
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rpc) grep -q '__UCLIBC_HAS_RPC__ 1' "$conf"; return $?;;
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locale) grep -q '__UCLIBC_HAS_LOCALE__ 1' "$conf"; return $?;;
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wchar) grep -q '__UCLIBC_HAS_WCHAR__ 1' "$conf"; return $?;;
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threads) grep -q '__UCLIBC_HAS_THREADS__ 1' "$conf"; return $?;;
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esac
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fi
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done
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return 1
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}
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find_libs() {
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local spec="$(echo "$LIB_SPECS" | sed -ne "s#^[[:space:]]*$1:##p")"
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if [ -n "$spec" ] && probe_cpp; then
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local libdir libdirs
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for libdir in $(
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"$CPP" $CFLAGS -v -x c /dev/null 2>&1 | \
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sed -ne 's#:# #g; s#^LIBRARY_PATH=##p'
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); do
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if [ -d "$libdir" ]; then
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libdirs="$libdirs $(cd "$libdir"; pwd)/"
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fi
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done
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local pattern
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for pattern in $(eval echo $spec); do
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find $libdirs -name "$pattern.so*" | sort -u
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done
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return 0
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fi
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return 1
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}
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find_bins() {
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local spec="$(echo "$BIN_SPECS" | sed -ne "s#^[[:space:]]*$1:##p")"
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if [ -n "$spec" ] && probe_cpp; then
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local sysroot="$("$CPP" -print-sysroot)"
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local bindir bindirs
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for bindir in $(
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echo "$sysroot/bin";
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echo "$sysroot/usr/bin";
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echo "$sysroot/usr/local/bin";
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echo "$TOOLCHAIN/bin";
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echo "$TOOLCHAIN/usr/bin";
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echo "$TOOLCHAIN/usr/local/bin";
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"$CPP" $CFLAGS -v -x c /dev/null 2>&1 | \
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sed -ne 's#:# #g; s#^COMPILER_PATH=##p'
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); do
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if [ -d "$bindir" ]; then
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bindirs="$bindirs $(cd "$bindir"; pwd)/"
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fi
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done
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local pattern
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for pattern in $(eval echo $spec); do
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find $bindirs -name "$pattern" | sort -u
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done
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return 0
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fi
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return 1
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}
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wrap_bins() {
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if probe_cc; then
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mkdir -p "$1" || return 1
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local cmd
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for cmd in "${CC%-*}-"*; do
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if [ -x "$cmd" ]; then
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local out="$1/${cmd##*/}"
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echo '#!/bin/sh' > "$out"
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case "${cmd##*/}" in
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*-*cc|*-*cc-*|*-*++|*-*++-*|*-cpp)
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echo -n 'exec "'"$cmd"'" '"$CFLAGS"' ' >> "$out"
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echo -n '${STAGING_DIR:+-idirafter ' >> "$out"
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echo -n '"$STAGING_DIR/usr/include" ' >> "$out"
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echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
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echo -n '-Wl,-rpath-link,' >> "$out"
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echo '"$STAGING_DIR/usr/lib"} "$@"' >> "$out"
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;;
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*-ld)
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echo -n 'exec "'"$cmd"'" ${STAGING_DIR:+' >> "$out"
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echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
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echo -n '-rpath-link ' >> "$out"
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echo '"$STAGING_DIR/usr/lib"} "$@"' >> "$out"
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;;
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*)
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echo "exec '$cmd' \"\$@\"" >> "$out"
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;;
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esac
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chmod +x "$out"
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fi
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done
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return 0
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fi
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return 1
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}
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probe_cc() {
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if [ -z "$CC" ]; then
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local bin
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for bin in "bin" "usr/bin" "usr/local/bin"; do
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local cmd
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for cmd in "$TOOLCHAIN/$bin/"*-*cc*; do
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if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
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CC="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
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return 0
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fi
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done
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done
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return 1
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fi
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return 0
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}
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probe_cxx() {
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if [ -z "$CXX" ]; then
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local bin
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for bin in "bin" "usr/bin" "usr/local/bin"; do
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local cmd
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for cmd in "$TOOLCHAIN/$bin/"*-*++*; do
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if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
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CXX="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
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return 0
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fi
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done
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done
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return 1
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fi
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return 0
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}
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probe_cpp() {
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if [ -z "$CPP" ]; then
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local bin
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for bin in "bin" "usr/bin" "usr/local/bin"; do
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local cmd
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for cmd in "$TOOLCHAIN/$bin/"*-cpp*; do
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if [ -x "$cmd" ] && [ ! -h "$cmd" ]; then
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CPP="$(cd "${cmd%/*}"; pwd)/${cmd##*/}"
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return 0
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fi
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done
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done
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return 1
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fi
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return 0
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}
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probe_libc() {
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if [ -z "$LIBC_TYPE" ]; then
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if test_uclibc; then
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LIBC_TYPE="uclibc"
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else
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LIBC_TYPE="glibc"
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fi
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fi
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return 0
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}
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while [ -n "$1" ]; do
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arg="$1"; shift
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case "$arg" in
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-l|--libs)
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[ -n "$1" ] || {
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echo "No library given, specify one of:"$(echo "$LIB_SPECS" | sed -ne 's#:.*$##p') >&1
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exit 1
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}
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FINDLIB="$1"; shift
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;;
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-b|--bins)
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[ -n "$1" ] || {
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echo "No binary given, specify one of:"$(echo "$BIN_SPECS" | sed -ne 's#:.*$##p') >&1
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exit 1
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}
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FINDBIN="$1"; shift
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;;
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--toolchain)
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[ -d "$1" ] || {
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echo "Toolchain directory '$1' does not exist." >&2
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exit 1
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}
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TOOLCHAIN="$(cd "$1"; pwd)"; shift
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;;
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--cflags)
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CFLAGS="${CFLAGS:+$CFLAGS }$1"; shift
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;;
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--print-libc)
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if probe_cc; then
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probe_libc
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echo "$LIBC_TYPE"
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exit 0
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fi
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echo "No C compiler found in '$TOOLCHAIN'." >&2
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exit 1
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;;
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--print-target)
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if probe_cc; then
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CC="${CC##*/}"
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echo "${CC%-*}"
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exit 0
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fi
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echo "No C compiler found in '$TOOLCHAIN'." >&2
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exit 1
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;;
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--print-bin)
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if [ -z "$1" ]; then
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echo "Available programs:" >&2
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echo $(echo "$BIN_SPECS" | sed -ne 's#:.*$##p') >&2
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exit 1
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fi
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find_bins "$1" || exec "$0" --toolchain "$TOOLCHAIN" --print-bin
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exit 0
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;;
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--print-libs)
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if [ -z "$1" ]; then
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echo "Available libraries:" >&2
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echo $(echo "$LIB_SPECS" | sed -ne 's#:.*$##p') >&2
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exit 1
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fi
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find_libs "$1" || exec "$0" --toolchain "$TOOLCHAIN" --print-libs
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exit 0
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;;
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--test)
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test_feature "$1"
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exit $?
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;;
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--wrap)
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[ -n "$1" ] || exec "$0" --help
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wrap_bins "$1"
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exit $?
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;;
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-h|--help)
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me="$(basename "$0")"
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echo -e "\nUsage:\n" >&2
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echo -e " $me --toolchain {directory} --print-libc" >&2
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echo -e " Print the libc implementation and exit.\n" >&2
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echo -e " $me --toolchain {directory} --print-target" >&2
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echo -e " Print the GNU target name and exit.\n" >&2
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echo -e " $me --toolchain {directory} --print-bin {program}" >&2
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echo -e " Print executables belonging to given program," >&2
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echo -e " omit program argument to get a list of names.\n" >&2
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echo -e " $me --toolchain {directory} --print-libs {library}" >&2
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echo -e " Print shared objects belonging to given library," >&2
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echo -e " omit library argument to get a list of names.\n" >&2
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echo -e " $me --toolchain {directory} --test {feature}" >&2
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echo -e " Test given feature, exit code indicates success." >&2
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echo -e " Possible features are 'c', 'c++', 'softfloat'," >&2
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echo -e " 'lfs', 'rpc', 'ipv6', 'wchar', 'locale' and " >&2
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echo -e " 'threads'.\n" >&2
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echo -e " $me --toolchain {directory} --wrap {directory}" >&2
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echo -e " Create wrapper scripts for C and C++ compiler, " >&2
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echo -e " linker, assembler and other key executables in " >&2
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echo -e " the directory given with --wrap.\n" >&2
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echo -e " $me --help" >&2
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echo -e " Display this help text and exit.\n\n" >&2
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echo -e " Most commands also take a --cflags parameter which " >&2
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echo -e " is used to specify C flags to be passed to the " >&2
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echo -e " cross compiler when performing tests." >&2
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echo -e " This paremter may be repeated multiple times." >&2
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exit 1
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;;
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*)
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echo "Unknown argument '$arg'" >&2
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exec $0 --help
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;;
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esac
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done
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exit 0
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