stdenv: use improved strip.sh for aarch64-linux

Adapted from PR #246164
TODO: clean up / use it everywhere on the next rebuild.

pkgs/build-support/setup-hooks/strip-tmp-aarch64.sh

@@ -0,0 +1,90 @@
+# This setup hook strips libraries and executables in the fixup phase.
+
+fixupOutputHooks+=(_doStrip)
+
+_doStrip() {
+    # We don't bother to strip build platform code because it shouldn't make it
+    # to $out anyways---if it does, that's a bigger problem that a lack of
+    # stripping will help catch.
+    local -ra flags=(dontStripHost dontStripTarget)
+    local -ra debugDirs=(stripDebugList stripDebugListTarget)
+    local -ra allDirs=(stripAllList stripAllListTarget)
+    local -ra stripCmds=(STRIP STRIP_FOR_TARGET)
+    local -ra ranlibCmds=(RANLIB RANLIB_FOR_TARGET)
+
+    # TODO(structured-attrs): This doesn't work correctly if one of
+    #   the items in strip*List or strip*Flags contains a space,
+    #   even with structured attrs enabled.  This is OK for now
+    #   because very few packages set any of these, and it doesn't
+    #   affect any of them.
+    #
+    #   After __structuredAttrs = true is universal, come back and
+    #   push arrays all the way through this logic.
+
+    # Strip only host paths by default. Leave targets as is.
+    stripDebugList=${stripDebugList[*]:-lib lib32 lib64 libexec bin sbin}
+    stripDebugListTarget=${stripDebugListTarget[*]:-}
+    stripAllList=${stripAllList[*]:-}
+    stripAllListTarget=${stripAllListTarget[*]:-}
+
+    local i
+    for i in ${!stripCmds[@]}; do
+        local -n flag="${flags[$i]}"
+        local -n debugDirList="${debugDirs[$i]}"
+        local -n allDirList="${allDirs[$i]}"
+        local -n stripCmd="${stripCmds[$i]}"
+        local -n ranlibCmd="${ranlibCmds[$i]}"
+
+        # `dontStrip` disables them all
+        if [[ "${dontStrip-}" || "${flag-}" ]] || ! type -f "${stripCmd-}" 2>/dev/null 1>&2
+        then continue; fi
+
+        stripDirs "$stripCmd" "$ranlibCmd" "$debugDirList" "${stripDebugFlags[*]:--S -p}"
+        stripDirs "$stripCmd" "$ranlibCmd" "$allDirList" "${stripAllFlags[*]:--s -p}"
+    done
+}
+
+stripDirs() {
+    local cmd="$1"
+    local ranlibCmd="$2"
+    local paths="$3"
+    local stripFlags="$4"
+    local pathsNew=
+
+    [ -z "$cmd" ] && echo "stripDirs: Strip command is empty" 1>&2 && exit 1
+    [ -z "$ranlibCmd" ] && echo "stripDirs: Ranlib command is empty" 1>&2 && exit 1
+
+    local p
+    for p in ${paths}; do
+        if [ -e "$prefix/$p" ]; then
+            pathsNew="${pathsNew} $prefix/$p"
+        fi
+    done
+    paths=${pathsNew}
+
+    if [ -n "${paths}" ]; then
+        echo "stripping (with command $cmd and flags $stripFlags) in $paths"
+        local striperr
+        striperr="$(mktemp 'striperr.XXXXXX')"
+        # Do not strip lib/debug. This is a directory used by setup-hooks/separate-debug-info.sh.
+        find $paths -type f -a '!' -path "$prefix/lib/debug/*" -print0 |
+            # Make sure we process files under symlinks only once. Otherwise
+            # 'strip` can corrupt files when writes to them in parallel:
+            #   https://github.com/NixOS/nixpkgs/issues/246147#issuecomment-1657072039
+            xargs -r -0 -n1 -- realpath -z | sort -u -z |
+
+            xargs -r -0 -n1 -P "$NIX_BUILD_CORES" -- $cmd $stripFlags 2>"$striperr" || exit_code=$?
+        # xargs exits with status code 123 if some but not all of the
+        # processes fail. We don't care if some of the files couldn't
+        # be stripped, so ignore specifically this code.
+        [[ "$exit_code" = 123 || -z "$exit_code" ]] || (cat "$striperr" 1>&2 && exit 1)
+
+        rm "$striperr"
+        # 'strip' does not normally preserve archive index in .a files.
+        # This usually causes linking failures against static libs like:
+        #   ld: ...-i686-w64-mingw32-stage-final-gcc-13.0.0-lib/i686-w64-mingw32/lib/libstdc++.dll.a:
+        #     error adding symbols: archive has no index; run ranlib to add one
+        # Restore the index by running 'ranlib'.
+        find $paths -name '*.a' -type f -exec $ranlibCmd '{}' \; 2>/dev/null
+    fi
+}

pkgs/stdenv/generic/default.nix

@@ -70,7 +70,10 @@ let
       ../../build-support/setup-hooks/prune-libtool-files.sh
       ../../build-support/setup-hooks/reproducible-builds.sh
       ../../build-support/setup-hooks/set-source-date-epoch-to-latest.sh
-      ../../build-support/setup-hooks/strip.sh
+      (with buildPlatform; if isAarch64 && isLinux
+        then ../../build-support/setup-hooks/strip-tmp-aarch64.sh
+        else ../../build-support/setup-hooks/strip.sh
+      )
     ] ++ lib.optionals hasCC [ cc ];
 
   defaultBuildInputs = extraBuildInputs;