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mk-component-set: apply ld-wrapper for rust-ld
Upstream-shipped `rust-ld` is now used as default linker for some targets on nightly. It needs ld-wrapper for interopation with libraries from Nix. Currently `wrapBintools` interface is uneasy for hook use inside a derivation also containing non-bintools stuff. We hereby copy part of the implementation and wrap `rust-ld` in-place. See: rust-lang/rust#71515 (comment)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,281 @@ | ||
| #! @shell@ | ||
| # This file is copied from nixpkgs with additional handling of `-flavor` prefix. | ||
| # See: https://github.com/NixOS/nixpkgs/blob/fa016524af1414fd5e0d9f3de43b6377486601bf/pkgs/build-support/bintools-wrapper/ld-wrapper.sh | ||
| set -eu -o pipefail +o posix | ||
| shopt -s nullglob | ||
|
|
||
| if (( "${NIX_DEBUG:-0}" >= 7 )); then | ||
| set -x | ||
| fi | ||
|
|
||
| flavorParams=() | ||
| if [[ $# -ge 2 && "$1" == -flavor ]]; then | ||
| flavorParams=( "$1" "$2" ) | ||
| shift 2 | ||
| fi | ||
|
|
||
| path_backup="$PATH" | ||
|
|
||
| # phase separation makes this look useless | ||
| # shellcheck disable=SC2157 | ||
| if [ -n "@coreutils_bin@" ]; then | ||
| PATH="@coreutils_bin@/bin" | ||
| fi | ||
|
|
||
| source @out@/nix-support/utils.bash | ||
|
|
||
| if [ -z "${NIX_BINTOOLS_WRAPPER_FLAGS_SET_@suffixSalt@:-}" ]; then | ||
| source @out@/nix-support/add-flags.sh | ||
| fi | ||
|
|
||
|
|
||
| # Optionally filter out paths not refering to the store. | ||
| expandResponseParams "$@" | ||
|
|
||
| # NIX_LINK_TYPE is set if ld has been called through our cc wrapper. We take | ||
| # advantage of this to avoid both recalculating it, and also repeating other | ||
| # processing cc wrapper has already done. | ||
| if [[ -n "${NIX_LINK_TYPE_@suffixSalt@:-}" ]]; then | ||
| linkType=$NIX_LINK_TYPE_@suffixSalt@ | ||
| else | ||
| linkType=$(checkLinkType "${params[@]}") | ||
| fi | ||
|
|
||
| if [[ "${NIX_ENFORCE_PURITY:-}" = 1 && -n "${NIX_STORE:-}" | ||
| && ( -z "$NIX_IGNORE_LD_THROUGH_GCC_@suffixSalt@" || -z "${NIX_LINK_TYPE_@suffixSalt@:-}" ) ]]; then | ||
| rest=() | ||
| nParams=${#params[@]} | ||
| declare -i n=0 | ||
|
|
||
| while (( "$n" < "$nParams" )); do | ||
| p=${params[n]} | ||
| p2=${params[n+1]:-} # handle `p` being last one | ||
| if [ "${p:0:3}" = -L/ ] && badPath "${p:2}"; then | ||
| skip "${p:2}" | ||
| elif [ "$p" = -L ] && badPath "$p2"; then | ||
| n+=1; skip "$p2" | ||
| elif [ "$p" = -rpath ] && badPath "$p2"; then | ||
| n+=1; skip "$p2" | ||
| elif [ "$p" = -dynamic-linker ] && badPath "$p2"; then | ||
| n+=1; skip "$p2" | ||
| elif [ "$p" = -syslibroot ] && [ $p2 == // ]; then | ||
| # When gcc is built on darwin --with-build-sysroot=/ | ||
| # produces '-syslibroot //' linker flag. It's a no-op, | ||
| # which does not introduce impurities. | ||
| n+=1; skip "$p2" | ||
| elif [ "${p:0:10}" = /LIBPATH:/ ] && badPath "${p:9}"; then | ||
| reject "${p:9}" | ||
| # We need to not match LINK.EXE-style flags like | ||
| # /NOLOGO or /LIBPATH:/nix/store/foo | ||
| elif [[ $p =~ ^/[^:]*/ ]] && badPath "$p"; then | ||
| reject "$p" | ||
| elif [ "${p:0:9}" = --sysroot ]; then | ||
| # Our ld is not built with sysroot support (Can we fix that?) | ||
| : | ||
| else | ||
| rest+=("$p") | ||
| fi | ||
| n+=1 | ||
| done | ||
| # Old bash empty array hack | ||
| params=(${rest+"${rest[@]}"}) | ||
| fi | ||
|
|
||
|
|
||
| source @out@/nix-support/add-hardening.sh | ||
|
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||
| extraAfter=() | ||
| extraBefore=("${flavorParams[@]}" ${hardeningLDFlags[@]+"${hardeningLDFlags[@]}"}) | ||
|
|
||
| if [ -z "${NIX_LINK_TYPE_@suffixSalt@:-}" ]; then | ||
| extraAfter+=($(filterRpathFlags "$linkType" $NIX_LDFLAGS_@suffixSalt@)) | ||
| extraBefore+=($(filterRpathFlags "$linkType" $NIX_LDFLAGS_BEFORE_@suffixSalt@)) | ||
|
|
||
| # By adding dynamic linker to extraBefore we allow the users set their | ||
| # own dynamic linker as NIX_LD_FLAGS will override earlier set flags | ||
| if [[ "$linkType" == dynamic && -n "$NIX_DYNAMIC_LINKER_@suffixSalt@" ]]; then | ||
| extraBefore+=("-dynamic-linker" "$NIX_DYNAMIC_LINKER_@suffixSalt@") | ||
| fi | ||
| fi | ||
|
|
||
| extraAfter+=($(filterRpathFlags "$linkType" $NIX_LDFLAGS_AFTER_@suffixSalt@)) | ||
|
|
||
| # These flags *must not* be pulled up to -Wl, flags, so they can't go in | ||
| # add-flags.sh. They must always be set, so must not be disabled by | ||
| # NIX_LDFLAGS_SET. | ||
| if [ -e @out@/nix-support/add-local-ldflags-before.sh ]; then | ||
| source @out@/nix-support/add-local-ldflags-before.sh | ||
| fi | ||
|
|
||
|
|
||
| # Three tasks: | ||
| # | ||
| # 1. Find all -L... switches for rpath | ||
| # | ||
| # 2. Find relocatable flag for build id. | ||
| # | ||
| # 3. Choose 32-bit dynamic linker if needed | ||
| declare -a libDirs | ||
| declare -A libs | ||
| declare -i relocatable=0 link32=0 | ||
|
|
||
| linkerOutput="a.out" | ||
|
|
||
| if | ||
| [ "$NIX_DONT_SET_RPATH_@suffixSalt@" != 1 ] \ | ||
| || [ "$NIX_SET_BUILD_ID_@suffixSalt@" = 1 ] \ | ||
| || [ -e @out@/nix-support/dynamic-linker-m32 ] | ||
| then | ||
| prev= | ||
| # Old bash thinks empty arrays are undefined, ugh. | ||
| for p in \ | ||
| ${extraBefore+"${extraBefore[@]}"} \ | ||
| ${params+"${params[@]}"} \ | ||
| ${extraAfter+"${extraAfter[@]}"} | ||
| do | ||
| case "$prev" in | ||
| -L) | ||
| libDirs+=("$p") | ||
| ;; | ||
| -l) | ||
| libs["lib${p}.so"]=1 | ||
| ;; | ||
| -m) | ||
| # Presumably only the last `-m` flag has any effect. | ||
| case "$p" in | ||
| elf_i386) link32=1;; | ||
| *) link32=0;; | ||
| esac | ||
| ;; | ||
| -dynamic-linker | -plugin) | ||
| # Ignore this argument, or it will match *.so and be added to rpath. | ||
| ;; | ||
| *) | ||
| case "$p" in | ||
| -L/*) | ||
| libDirs+=("${p:2}") | ||
| ;; | ||
| -l?*) | ||
| libs["lib${p:2}.so"]=1 | ||
| ;; | ||
| "${NIX_STORE:-}"/*.so | "${NIX_STORE:-}"/*.so.*) | ||
| # This is a direct reference to a shared library. | ||
| libDirs+=("${p%/*}") | ||
| libs["${p##*/}"]=1 | ||
| ;; | ||
| -r | --relocatable | -i) | ||
| relocatable=1 | ||
| esac | ||
| ;; | ||
| esac | ||
| prev="$p" | ||
| done | ||
| fi | ||
|
|
||
| # Determine linkerOutput | ||
| prev= | ||
| for p in \ | ||
| ${extraBefore+"${extraBefore[@]}"} \ | ||
| ${params+"${params[@]}"} \ | ||
| ${extraAfter+"${extraAfter[@]}"} | ||
| do | ||
| case "$prev" in | ||
| -o) | ||
| # Informational for post-link-hook | ||
| linkerOutput="$p" | ||
| ;; | ||
| *) | ||
| ;; | ||
| esac | ||
| prev="$p" | ||
| done | ||
|
|
||
| if [[ "$link32" == "1" && "$linkType" == dynamic && -e "@out@/nix-support/dynamic-linker-m32" ]]; then | ||
| # We have an alternate 32-bit linker and we're producing a 32-bit ELF, let's | ||
| # use it. | ||
| extraAfter+=( | ||
| '-dynamic-linker' | ||
| "$(< @out@/nix-support/dynamic-linker-m32)" | ||
| ) | ||
| fi | ||
|
|
||
| # Add all used dynamic libraries to the rpath. | ||
| if [[ "$NIX_DONT_SET_RPATH_@suffixSalt@" != 1 && "$linkType" != static-pie ]]; then | ||
| # For each directory in the library search path (-L...), | ||
| # see if it contains a dynamic library used by a -l... flag. If | ||
| # so, add the directory to the rpath. | ||
| # It's important to add the rpath in the order of -L..., so | ||
| # the link time chosen objects will be those of runtime linking. | ||
| declare -A rpaths | ||
| for dir in ${libDirs+"${libDirs[@]}"}; do | ||
| if [[ "$dir" =~ [/.][/.] ]] && dir2=$(readlink -f "$dir"); then | ||
| dir="$dir2" | ||
| fi | ||
| if [ -n "${rpaths[$dir]:-}" ] || [[ "$dir" != "${NIX_STORE:-}"/* ]]; then | ||
| # If the path is not in the store, don't add it to the rpath. | ||
| # This typically happens for libraries in /tmp that are later | ||
| # copied to $out/lib. If not, we're screwed. | ||
| continue | ||
| fi | ||
| for path in "$dir"/*; do | ||
| file="${path##*/}" | ||
| if [ "${libs[$file]:-}" ]; then | ||
| # This library may have been provided by a previous directory, | ||
| # but if that library file is inside an output of the current | ||
| # derivation, it can be deleted after this compilation and | ||
| # should be found in a later directory, so we add all | ||
| # directories that contain any of the libraries to rpath. | ||
| rpaths["$dir"]=1 | ||
| extraAfter+=(-rpath "$dir") | ||
| break | ||
| fi | ||
| done | ||
| done | ||
|
|
||
| fi | ||
|
|
||
| # This is outside the DONT_SET_RPATH branch because it's more targeted and we | ||
| # usually want it (on Darwin) even if DONT_SET_RPATH is set. | ||
| if [ -n "${NIX_COREFOUNDATION_RPATH:-}" ]; then | ||
| extraAfter+=(-rpath $NIX_COREFOUNDATION_RPATH) | ||
| fi | ||
|
|
||
| # Only add --build-id if this is a final link. FIXME: should build gcc | ||
| # with --enable-linker-build-id instead? | ||
| # | ||
| # Note: `lld` interprets `--build-id` to mean `--build-id=fast`; GNU ld defaults | ||
| # to SHA1. | ||
| if [ "$NIX_SET_BUILD_ID_@suffixSalt@" = 1 ] && ! (( "$relocatable" )); then | ||
| extraAfter+=(--build-id="${NIX_BUILD_ID_STYLE:-sha1}") | ||
| fi | ||
|
|
||
|
|
||
| # Optionally print debug info. | ||
| if (( "${NIX_DEBUG:-0}" >= 1 )); then | ||
| # Old bash workaround, see above. | ||
| echo "extra flags before to @prog@:" >&2 | ||
| printf " %q\n" ${extraBefore+"${extraBefore[@]}"} >&2 | ||
| echo "original flags to @prog@:" >&2 | ||
| printf " %q\n" ${params+"${params[@]}"} >&2 | ||
| echo "extra flags after to @prog@:" >&2 | ||
| printf " %q\n" ${extraAfter+"${extraAfter[@]}"} >&2 | ||
| fi | ||
|
|
||
| PATH="$path_backup" | ||
| # Old bash workaround, see above. | ||
|
|
||
| if (( "${NIX_LD_USE_RESPONSE_FILE:-@use_response_file_by_default@}" >= 1 )); then | ||
| @prog@ @<(printf "%q\n" \ | ||
| ${extraBefore+"${extraBefore[@]}"} \ | ||
| ${params+"${params[@]}"} \ | ||
| ${extraAfter+"${extraAfter[@]}"}) | ||
| else | ||
| @prog@ \ | ||
| ${extraBefore+"${extraBefore[@]}"} \ | ||
| ${params+"${params[@]}"} \ | ||
| ${extraAfter+"${extraAfter[@]}"} | ||
| fi | ||
|
|
||
| if [ -e "@out@/nix-support/post-link-hook" ]; then | ||
| source @out@/nix-support/post-link-hook | ||
| fi |
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