[scripts] add ext-toolchain.sh, a utility for external toolchains
authorJo-Philipp Wich <jow@openwrt.org>
Wed, 18 Jan 2012 03:03:24 +0000 (03:03 +0000)
committerJo-Philipp Wich <jow@openwrt.org>
Wed, 18 Jan 2012 03:03:24 +0000 (03:03 +0000)
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

SVN-Revision: 29765

scripts/ext-toolchain.sh [new file with mode: 0755]

diff --git a/scripts/ext-toolchain.sh b/scripts/ext-toolchain.sh
new file mode 100755 (executable)
index 0000000..de5d676
--- /dev/null
@@ -0,0 +1,410 @@
+#!/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