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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
This commit is contained in:
jow 2012-01-18 03:03:24 +00:00
parent 220fd247bc
commit be99e06ec8

410
scripts/ext-toolchain.sh Executable file
View File

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#!/usr/bin/env bash
# Script to copy a toolchain from given source to given
# destination directory.
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
cpp: 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" ]; then
local lib
for lib in "$sysroot"/{lib,usr/lib,usr/local/lib}/ld-uClibc*.so*; do
if [ -f "$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/$inc/bits/uClibc_config.h"
if [ -f "$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:]]*$1:##p")"
if [ -n "$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:]]*$1:##p")"
if [ -n "$spec" ] && probe_cpp; then
local sysroot="$("$CPP" -print-sysroot)"
local bindir bindirs
for bindir in $(
echo "$sysroot/bin";
echo "$sysroot/usr/bin";
echo "$sysroot/usr/local/bin";
echo "$TOOLCHAIN/bin";
echo "$TOOLCHAIN/usr/bin";
echo "$TOOLCHAIN/usr/local/bin";
"$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_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##*/}"
echo '#!/bin/sh' > "$out"
case "${cmd##*/}" in
*-*cc|*-*cc-*|*-*++|*-*++-*|*-cpp)
echo -n 'exec "'"$cmd"'" '"$CFLAGS"' ' >> "$out"
echo -n '${STAGING_DIR:+-idirafter ' >> "$out"
echo -n '"$STAGING_DIR/usr/include" ' >> "$out"
echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
echo -n '-Wl,-rpath-link,' >> "$out"
echo '"$STAGING_DIR/usr/lib"} "$@"' >> "$out"
;;
*-ld)
echo -n 'exec "'"$cmd"'" ${STAGING_DIR:+' >> "$out"
echo -n '-L "$STAGING_DIR/usr/lib" ' >> "$out"
echo -n '-rpath-link ' >> "$out"
echo '"$STAGING_DIR/usr/lib"} "$@"' >> "$out"
;;
*)
echo "exec '$cmd' \"\$@\"" >> "$out"
;;
esac
chmod +x "$out"
fi
done
return 0
fi
return 1
}
probe_cc() {
if [ -z "$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
-l|--libs)
[ -n "$1" ] || {
echo "No library given, specify one of:"$(echo "$LIB_SPECS" | sed -ne 's#:.*$##p') >&1
exit 1
}
FINDLIB="$1"; shift
;;
-b|--bins)
[ -n "$1" ] || {
echo "No binary given, specify one of:"$(echo "$BIN_SPECS" | sed -ne 's#:.*$##p') >&1
exit 1
}
FINDBIN="$1"; shift
;;
--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 '$TOOLCHAIN'." >&2
exit 1
;;
--print-target)
if probe_cc; then
CC="${CC##*/}"
echo "${CC%-*}"
exit 0
fi
echo "No C compiler found in '$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 $?
;;
-h|--help)
me="$(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 " $me --help" >&2
echo -e " Display this help text and exit.\n\n" >&2
echo -e " Most commands also take a --cflags parameter which " >&2
echo -e " is used to specify C flags to be passed to the " >&2
echo -e " cross compiler when performing tests." >&2
echo -e " This paremter may be repeated multiple times." >&2
exit 1
;;
*)
echo "Unknown argument '$arg'" >&2
exec $0 --help
;;
esac
done
exit 0