9f1e009975
This is basically a sed job, in preparation of the next commit. The rules are more or less: - s"NIX_(.._WRAPPER_)?([a-zA-Z0-9@]*)"NIX_\1@infixSalt@_\2"g - except for non-cc-wrapper-specific vars like `NIX_DEBUG`
164 lines
5 KiB
Bash
164 lines
5 KiB
Bash
#! @shell@
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set -eu -o pipefail
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shopt -s nullglob
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path_backup="$PATH"
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# phase separation makes this look useless
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# shellcheck disable=SC2157
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if [ -n "@coreutils_bin@" ]; then
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PATH="@coreutils_bin@/bin"
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fi
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if [ -n "$NIX_LD_WRAPPER_@infixSalt@_START_HOOK" ]; then
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source "$NIX_LD_WRAPPER_@infixSalt@_START_HOOK"
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fi
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if [ -z "$NIX_CC_WRAPPER_@infixSalt@_FLAGS_SET" ]; then
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source @out@/nix-support/add-flags.sh
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fi
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source @out@/nix-support/utils.sh
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# Optionally filter out paths not refering to the store.
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expandResponseParams "$@"
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if [[ "$NIX_ENFORCE_PURITY" = 1 && -n "$NIX_STORE"
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&& ( -z "$NIX_@infixSalt@_IGNORE_LD_THROUGH_GCC" || -z "$NIX_@infixSalt@_LDFLAGS_SET" ) ]]; then
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rest=()
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nParams=${#params[@]}
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declare -i n=0
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while [ "$n" -lt "$nParams" ]; do
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p=${params[n]}
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p2=${params[n+1]}
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if [ "${p:0:3}" = -L/ ] && badPath "${p:2}"; then
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skip "${p:2}"
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elif [ "$p" = -L ] && badPath "$p2"; then
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n+=1; skip "$p2"
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elif [ "$p" = -rpath ] && badPath "$p2"; then
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n+=1; skip "$p2"
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elif [ "$p" = -dynamic-linker ] && badPath "$p2"; then
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n+=1; skip "$p2"
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elif [ "${p:0:1}" = / ] && badPath "$p"; then
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# We cannot skip this; barf.
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echo "impure path \`$p' used in link" >&2
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exit 1
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elif [ "${p:0:9}" = --sysroot ]; then
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# Our ld is not built with sysroot support (Can we fix that?)
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:
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else
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rest+=("$p")
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fi
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n+=1
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done
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params=("${rest[@]}")
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fi
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source @out@/nix-support/add-hardening.sh
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extraAfter=("${hardeningLDFlags[@]}")
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extraBefore=()
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if [ -z "$NIX_@infixSalt@_LDFLAGS_SET" ]; then
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extraAfter+=($NIX_@infixSalt@_LDFLAGS)
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extraBefore+=($NIX_@infixSalt@_LDFLAGS_BEFORE)
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fi
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extraAfter+=($NIX_@infixSalt@_LDFLAGS_AFTER $NIX_@infixSalt@_LDFLAGS_HARDEN)
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declare -a libDirs
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declare -A libs
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relocatable=
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# Find all -L... switches for rpath, and relocatable flags for build id.
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if [ "$NIX_@infixSalt@_DONT_SET_RPATH" != 1 ] || [ "$NIX_@infixSalt@_SET_BUILD_ID" = 1 ]; then
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prev=
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for p in "${extraBefore[@]}" "${params[@]}" "${extraAfter[@]}"; do
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case "$prev" in
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-L)
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libDirs+=("$p")
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;;
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-l)
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libs["lib${p}.so"]=1
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;;
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-dynamic-linker | -plugin)
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# Ignore this argument, or it will match *.so and be added to rpath.
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;;
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*)
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case "$p" in
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-L/*)
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libDirs+=("${p:2}")
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;;
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-l?*)
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libs["lib${p:2}.so"]=1
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;;
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"$NIX_STORE"/*.so | "$NIX_STORE"/*.so.*)
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# This is a direct reference to a shared library.
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libDirs+=("${p%/*}")
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libs["${p##*/}"]=1
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;;
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-r | --relocatable | -i)
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relocatable=1
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esac
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;;
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esac
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prev="$p"
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done
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fi
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# Add all used dynamic libraries to the rpath.
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if [ "$NIX_@infixSalt@_DONT_SET_RPATH" != 1 ]; then
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# For each directory in the library search path (-L...),
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# see if it contains a dynamic library used by a -l... flag. If
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# so, add the directory to the rpath.
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# It's important to add the rpath in the order of -L..., so
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# the link time chosen objects will be those of runtime linking.
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declare -A rpaths
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for dir in "${libDirs[@]}"; do
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if [[ "$dir" =~ [/.][/.] ]] && dir2=$(readlink -f "$dir"); then
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dir="$dir2"
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fi
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if [ "${rpaths[$dir]}" ] || [[ "$dir" != "$NIX_STORE"/* ]]; then
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# If the path is not in the store, don't add it to the rpath.
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# This typically happens for libraries in /tmp that are later
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# copied to $out/lib. If not, we're screwed.
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continue
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fi
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for path in "$dir"/lib*.so; do
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file="${path##*/}"
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if [ "${libs[$file]}" ]; then
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libs["$file"]=
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if [ ! "${rpaths[$dir]}" ]; then
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rpaths["$dir"]=1
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extraAfter+=(-rpath "$dir")
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fi
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fi
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done
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done
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fi
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# Only add --build-id if this is a final link. FIXME: should build gcc
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# with --enable-linker-build-id instead?
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if [ "$NIX_@infixSalt@_SET_BUILD_ID" = 1 ] && [ ! "$relocatable" ]; then
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extraAfter+=(--build-id)
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fi
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# Optionally print debug info.
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if [ -n "$NIX_DEBUG" ]; then
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echo "extra flags before to @prog@:" >&2
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printf " %q\n" "${extraBefore[@]}" >&2
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echo "original flags to @prog@:" >&2
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printf " %q\n" "${params[@]}" >&2
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echo "extra flags after to @prog@:" >&2
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printf " %q\n" "${extraAfter[@]}" >&2
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fi
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if [ -n "$NIX_LD_WRAPPER_@infixSalt@_EXEC_HOOK" ]; then
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source "$NIX_LD_WRAPPER_@infixSalt@_EXEC_HOOK"
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fi
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PATH="$path_backup"
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exec @prog@ "${extraBefore[@]}" "${params[@]}" "${extraAfter[@]}"
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