diff options
Diffstat (limited to 'scripts/build/cc')
| -rw-r--r-- | scripts/build/cc/100-gcc.sh | 294 |
1 files changed, 247 insertions, 47 deletions
diff --git a/scripts/build/cc/100-gcc.sh b/scripts/build/cc/100-gcc.sh index 7085a904..0e0f8ed5 100644 --- a/scripts/build/cc/100-gcc.sh +++ b/scripts/build/cc/100-gcc.sh @@ -85,6 +85,169 @@ cc_gcc_lang_list() { } #------------------------------------------------------------------------------ +# Return a value of a requested GCC spec +cc_gcc_get_spec() { + local spec=$1 + local cc_and_cflags=$2 + + # GCC does not provide a facility to request a value of a spec string. + # The only way to do that I found was to augment the spec file with + # some dummy suffix handler that does nothing except printing it. + touch temp-input.spec_eval + { + echo ".spec_eval:" + echo "echo %(${spec})" + } > "tmp-specs-${spec}" + ${cc_and_cflags} -specs="tmp-specs-${spec}" -E temp-input.spec_eval +} + +#------------------------------------------------------------------------------ +# Report the type of a GCC option +cc_gcc_classify_opt() { + # Options present in multiple architectures + case "${1}" in + -march=*) echo "arch"; return;; + -mabi=*) echo "abi"; return;; + -mcpu=*|-mmcu=*) echo "cpu"; return;; + -mtune=*) echo "tune"; return;; + -mfpu=*) echo "fpu"; return;; + -mhard-float|-msoft-float|-mno-soft-float|-mno-float|-mfloat-abi=*|\ + -mfpu|-mno-fpu) echo "float"; return;; + -EB|-EL|-mbig-endian|-mlittle-endian|-mbig|-mlittle|-meb|-mel|-mb|-ml) echo "endian"; return;; + -mthumb|-marm) echo "mode"; return;; + esac + + # Arch-specific options and aliases + case "${CT_ARCH}" in + m68k) + case "${1}" in + -m68881) echo "float"; return;; + -m5[234]*|-mcfv4e) echo "cpu"; return;; + -m68*|-mc68*) echo "arch"; return;; + esac + ;; + mips) + case "${1}" in + -mips[1234]|-mips32|-mips32r*|-mips64|-mips64r*) echo "cpu"; return;; + esac + ;; + sh) + case "${1}" in + -m[12345]*) echo "cpu"; return;; + esac + esac + + # All tried and failed + echo "unknown" +} + +#------------------------------------------------------------------------------ +# This function lists the multilibs configured in the compiler (even if multilib +# is disabled - so that it lists the default GCC/OS directory, which may differ +# from the default 'lib'). It then performs a few multilib checks/quirks: +# +# 1. On SuperH target, configuring with default CPU (e.g. by supplying the target +# name as 'sh4', which is what CT-NG does) results in the compiler being unable to +# run if that same switch is passed to the resulting gcc (e.g. 'gcc -m4'). The reason +# for this behavior is that the script that determines the sysroot suffix is not +# aware of the default multilib selection, so it generates <sysroot>/m4 as the +# suffixed sysroot. But the main driver, knowing that -m4 is the default, does not +# even attempt to fall back to the non-suffixed sysroot (as it does with non-default +# multilibs) - as a result, gcc fails to find any library if invoked with -m4. +# The right solution would be to drop the default CPU from the multilib list +# completely, or make the print-sysroot-suffix.sh script aware of the defaults +# (which is not easy, as the defaults are not in tmake_file, but rather in tm_file...) +# +# 2. On MIPS target, gcc (or rather, ld, which it invokes under the hood) chokes +# if supplied with two -mabi=* options. I.e., 'gcc -mabi=n32' and 'gcc -mabi=32' both +# work, but 'gcc -mabi=32 -mabi=n32' produces an internal error in ld. Thus we do +# not supply target's CFLAGS in multilib builds - and after compiling pass-1 gcc, +# attempt to determine which CFLAGS need to be filtered out. +cc_gcc_multilib_housekeeping() { + local cc host + local flags osdir dir multilibs i f + local multilib_defaults + local suffix sysroot base lnk + local ml_arch ml_abi ml_cpu ml_tune ml_fpu ml_float ml_endian ml_mode ml_unknown ml + local new_cflags + + for arg in "$@"; do + eval "${arg// /\\ }" + done + + if [ \( "${CT_CANADIAN}" = "y" -o "${CT_CROSS_NATIVE}" = "y" \) -a "${host}" = "${CT_HOST}" ]; then + CT_DoLog EXTRA "Canadian Cross/Cross-native unable to confirm multilibs configuration "\ + "directly; will use build-compiler for housekeeping." + # Since we cannot run the desired compiler, substitute build-CC with the assumption + # that the host-CC is configured in the same way. + cc="${CT_BUILDTOOLS_PREFIX_DIR}/bin/${CT_TARGET}-gcc" + fi + + # sed: prepend dashes or do nothing if default is empty string + multilib_defaults=( $( cc_gcc_get_spec multilib_defaults "${cc}" | \ + ${sed} 's/\(^\|[[:space:]]\+\)\([^[:space:]]\)/ -\2/g' ) ) + CT_DoLog EXTRA "gcc default flags: '${multilib_defaults}'" + + multilibs=( $( "${cc}" -print-multi-lib ) ) + if [ ${#multilibs[@]} -ne 0 ]; then + CT_DoLog EXTRA "gcc configured with these multilibs (including the default):" + for i in "${multilibs[@]}"; do + dir="lib/${i%%;*}" + flags="${i#*;}" + flags=${flags//@/ -} + flags=$( echo ${flags} ) + osdir="lib/"$( "${cc}" -print-multi-os-directory ${flags} ) + CT_SanitizeVarDir dir osdir + CT_DoLog EXTRA " '${flags}' --> ${dir} (gcc) ${osdir} (os)" + for f in ${flags}; do + eval ml_`cc_gcc_classify_opt ${f}`=seen + done + done + else + CT_DoLog WARN "no multilib configuration: GCC unusable?" + fi + + # Filtering out some of the options provided in CT-NG config. Then *prepend* + # them to CT_TARGET_CFLAGS, like scripts/crosstool-NG.sh does. Zero out + # the stashed MULTILIB flags so that we don't process them again in the passes + # that follow. + CT_DoLog DEBUG "Configured target CFLAGS: '${CT_ARCH_TARGET_CFLAGS_MULTILIB}'" + ml_unknown= # Pass through anything we don't know about + for f in ${CT_ARCH_TARGET_CFLAGS_MULTILIB}; do + eval ml=\$ml_`cc_gcc_classify_opt ${f}` + if [ "${ml}" != "seen" ]; then + new_cflags="${new_cflags} ${f}" + fi + done + CT_DoLog DEBUG "Filtered target CFLAGS: '${new_cflags}'" + CT_EnvModify CT_TARGET_CFLAGS "${new_cflags} ${CT_TARGET_CFLAGS}" + CT_EnvModify CT_ARCH_TARGET_CFLAGS_MULTILIB "" + + # Currently, the only LDFLAGS are endianness-related + CT_DoLog DEBUG "Configured target LDFLAGS: '${CT_ARCH_TARGET_LDFLAGS_MULTILIB}'" + if [ "${ml_endian}" != "seen" ]; then + CT_EnvModify CT_TARGET_LDFLAGS "${CT_ARCH_TARGET_LDFLAGS_MULTILIB} ${CT_TARGET_LDFLAGS}" + CT_EnvModify CT_ARCH_TARGET_LDFLAGS_MULTILIB "" + fi + CT_DoLog DEBUG "Filtered target LDFLAGS: '${CT_ARCH_TARGET_LDFLAGS_MULTILIB}'" + + # Sysroot suffix fixup for the multilib default. + suffix=$( cc_gcc_get_spec sysroot_suffix_spec "${cc} ${multilib_defaults}" ) + if [ -n "${suffix}" ]; then + base=${suffix%/*} + sysroot=$( "${cc}" -print-sysroot ) + if [ -n "${base}" ]; then + CT_DoExecLog ALL mkdir -p "${sysroot}${base}" + lnk=$( echo "${base#/}" | ${sed} -e 's,[^/]*,..,g' ) + else + lnk=. + fi + CT_DoExecLog ALL rm -f "${sysroot}${suffix}" + CT_DoExecLog ALL ln -sfv "${lnk}" "${sysroot}${suffix}" + fi +} + +#------------------------------------------------------------------------------ # Core gcc pass 1 do_gcc_core_pass_1() { local -a core_opts @@ -273,6 +436,7 @@ do_gcc_core_backend() { extra_config+=(--disable-libgomp) extra_config+=(--disable-libmudflap) + extra_config+=(--disable-libmpx) if [ "${CT_CC_GCC_LIBSSP}" = "y" ]; then extra_config+=(--enable-libssp) @@ -403,10 +567,20 @@ do_gcc_core_backend() { extra_config+=("--with-system-zlib") fi - # Some versions of gcc have a deffective --enable-multilib. - # Since that's the default, only pass --disable-multilib. + # Some versions of gcc have a defective --enable-multilib. + # Since that's the default, only pass --disable-multilib. For multilib, + # also enable multiarch. Without explicit --enable-multiarch, pass-1 + # compiler is configured as multilib/no-multiarch and pass-2/final + # are multilib/multiarch (because gcc autodetects multiarch based on + # multiple instances of crt*.o in the install directory - which do + # not exist in pass-1). if [ "${CT_MULTILIB}" != "y" ]; then extra_config+=("--disable-multilib") + else + extra_config+=("--enable-multiarch") + if [ -n "${CT_CC_GCC_MULTILIB_LIST}" ]; then + extra_config+=("--with-multilib-list=${CT_CC_GCC_MULTILIB_LIST}") + fi fi CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'" @@ -522,14 +696,22 @@ do_gcc_core_backend() { CT_DoLog EXTRA "Building ${log_txt}" CT_DoExecLog ALL ${make} ${JOBSFLAGS} ${core_targets_all} + # Do not pass ${JOBSFLAGS} here: recent GCC builds have been failing + # in parallel 'make install' at random locations: libitm, libcilk, + # always for the files that are installed more than once to the same + # location (such as libitm.info). + # The symptom is that the install command fails with "File exists" + # error; running the same command manually succeeds. It looks like + # attempts to remove the destination and re-create it, but another + # install gets in the way. CT_DoLog EXTRA "Installing ${log_txt}" - CT_DoExecLog ALL ${make} ${JOBSFLAGS} ${core_targets_install} + CT_DoExecLog ALL ${make} ${core_targets_install} # Remove the libtool "pseudo-libraries": having them in the installed # tree makes the libtoolized utilities that are built next assume # that, for example, libsupc++ is an "accessory library", and not include # -lsupc++ to the link flags. That breaks ltrace, for example. - CT_DoLog EXTRA "Housekeeping for final gcc compiler" + CT_DoLog EXTRA "Housekeeping for core gcc compiler" CT_Pushd "${prefix}" find . -type f -name "*.la" -exec rm {} \; |CT_DoLog ALL CT_Popd @@ -550,25 +732,8 @@ do_gcc_core_backend() { CT_DoExecLog ALL ln -sfv "${CT_TARGET}-gcc${ext}" "${prefix}/bin/${CT_TARGET}-cc${ext}" fi - if [ "${CT_MULTILIB}" = "y" ]; then - if [ "${CT_CANADIAN}" = "y" -a "${mode}" = "baremetal" \ - -a "${host}" = "${CT_HOST}" ]; then - CT_DoLog WARN "Canadian Cross unable to confirm multilibs configured correctly" - else - multilibs=( $( "${prefix}/bin/${CT_TARGET}-gcc" -print-multi-lib \ - |tail -n +2 ) ) - if [ ${#multilibs[@]} -ne 0 ]; then - CT_DoLog EXTRA "gcc configured with these multilibs (besides the default):" - for i in "${multilibs[@]}"; do - dir="${i%%;*}" - flags="${i#*;}" - CT_DoLog EXTRA " ${flags//@/ -} --> ${dir}/" - done - else - CT_DoLog WARN "gcc configured for multilib, but none available" - fi - fi - fi + cc_gcc_multilib_housekeeping cc="${prefix}/bin/${CT_TARGET}-gcc" \ + host="${host}" } #------------------------------------------------------------------------------ @@ -613,6 +778,35 @@ do_gcc_for_build() { CT_EndStep } +gcc_movelibs() { + local multi_flags multi_dir multi_os_dir multi_root multi_index multi_count + local gcc_dir + + for arg in "$@"; do + eval "${arg// /\\ }" + done + + # Move only files, directories are for other multilibs + gcc_dir="${CT_PREFIX_DIR}/${CT_TARGET}/lib/${multi_os_dir}" + if [ ! -d "${gcc_dir}" ]; then + # GCC didn't install anything outside of sysroot + return + fi + ls "${gcc_dir}" | while read f; do + case "${f}" in + *.ld) + # Linker scripts remain in GCC's directory; elf2flt insists on + # finding them there. + continue + ;; + esac + if [ -f "${gcc_dir}/${f}" ]; then + CT_DoExecLog ALL mkdir -p "${multi_root}/lib/${multi_os_dir}" + CT_DoExecLog ALL mv "${gcc_dir}/${f}" "${multi_root}/lib/${multi_os_dir}/${f}" + fi + done +} + #------------------------------------------------------------------------------ # Build final gcc to run on host do_gcc_for_host() { @@ -644,10 +838,18 @@ do_gcc_for_host() { CT_DoStep INFO "Installing final gcc compiler" CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final" - "${final_backend}" "${final_opts[@]}" - CT_Popd + + # GCC installs stuff (including libgcc) into its own /lib dir, + # outside of sysroot, breaking linking with -static-libgcc. + # Fix up by moving the libraries into the sysroot. + if [ "${CT_USE_SYSROOT}" = "y" ]; then + CT_mkdir_pushd "${CT_BUILD_DIR}/build-cc-gcc-final-movelibs" + CT_IterateMultilibs gcc_movelibs movelibs + CT_Popd + fi + CT_EndStep } @@ -748,6 +950,14 @@ do_gcc_backend() { fi fi + if [ "${CT_CC_GCC_HAS_LIBMPX}" = "y" ]; then + if [ "${CT_CC_GCC_LIBMPX}" = "y" ]; then + extra_config+=(--enable-libmpx) + else + extra_config+=(--disable-libmpx) + fi + fi + final_LDFLAGS+=("${ldflags}") # *** WARNING ! *** @@ -880,10 +1090,15 @@ do_gcc_backend() { extra_config+=("--with-system-zlib") fi - # Some versions of gcc have a deffective --enable-multilib. + # Some versions of gcc have a defective --enable-multilib. # Since that's the default, only pass --disable-multilib. if [ "${CT_MULTILIB}" != "y" ]; then extra_config+=("--disable-multilib") + else + extra_config+=("--enable-multiarch") + if [ -n "${CT_CC_GCC_MULTILIB_LIST}" ]; then + extra_config+=("--with-multilib-list=${CT_CC_GCC_MULTILIB_LIST}") + fi fi CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'" @@ -921,11 +1136,12 @@ do_gcc_backend() { CT_DoLog EXTRA "Building final gcc compiler" CT_DoExecLog ALL ${make} ${JOBSFLAGS} all + # See the note on issues with parallel 'make install' in GCC above. CT_DoLog EXTRA "Installing final gcc compiler" if [ "${CT_STRIP_TARGET_TOOLCHAIN_EXECUTABLES}" = "y" ]; then - CT_DoExecLog ALL ${make} ${JOBSFLAGS} install-strip + CT_DoExecLog ALL ${make} install-strip else - CT_DoExecLog ALL ${make} ${JOBSFLAGS} install + CT_DoExecLog ALL ${make} install fi # Remove the libtool "pseudo-libraries": having them in the installed @@ -950,25 +1166,9 @@ do_gcc_backend() { file="$( ls -1 "${CT_PREFIX_DIR}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )" [ -z "${file}" ] || ext=".${file##*.}" if [ -f "${CT_PREFIX_DIR}/bin/${CT_TARGET}-gcc${ext}" ]; then - CT_DoExecLog ALL ln -sfv "${CT_TARGET}-gcc${ext}" "${CT_PREFIX_DIR}/bin/${CT_TARGET}-cc${ext}" + CT_DoExecLog ALL ln -sfv "${CT_TARGET}-gcc${ext}" "${prefix}/bin/${CT_TARGET}-cc${ext}" fi - if [ "${CT_MULTILIB}" = "y" ]; then - if [ "${CT_CANADIAN}" = "y" ]; then - CT_DoLog WARN "Canadian Cross unable to confirm multilibs configured correctly" - else - multilibs=( $( "${prefix}/bin/${CT_TARGET}-gcc" -print-multi-lib \ - |tail -n +2 ) ) - if [ ${#multilibs[@]} -ne 0 ]; then - CT_DoLog EXTRA "gcc configured with these multilibs (besides the default):" - for i in "${multilibs[@]}"; do - dir="${i%%;*}" - flags="${i#*;}" - CT_DoLog EXTRA " ${flags//@/ -} --> ${dir}/" - done - else - CT_DoLog WARN "gcc configured for multilib, but none available" - fi - fi - fi + cc_gcc_multilib_housekeeping cc="${prefix}/bin/${CT_TARGET}-gcc" \ + host="${host}" } |