pyrox.dev
1# This setup hook strips libraries and executables in the fixup phase.
2
3fixupOutputHooks+=(_doStrip)
4
5_doStrip() {
6 # We don't bother to strip build platform code because it shouldn't make it
7 # to $out anyways---if it does, that's a bigger problem that a lack of
8 # stripping will help catch.
9 local -ra flags=(dontStripHost dontStripTarget)
10 local -ra debugDirs=(stripDebugList stripDebugListTarget)
11 local -ra allDirs=(stripAllList stripAllListTarget)
12 local -ra stripCmds=(STRIP STRIP_FOR_TARGET)
13 local -ra ranlibCmds=(RANLIB RANLIB_FOR_TARGET)
14
15 # TODO(structured-attrs): This doesn't work correctly if one of
16 # the items in strip*List or strip*Flags contains a space,
17 # even with structured attrs enabled. This is OK for now
18 # because very few packages set any of these, and it doesn't
19 # affect any of them.
20 #
21 # After __structuredAttrs = true is universal, come back and
22 # push arrays all the way through this logic.
23
24 # Strip only host paths by default. Leave targets as is.
25 stripDebugList=${stripDebugList[*]:-lib lib32 lib64 libexec bin sbin Applications Library/Frameworks}
26 stripDebugListTarget=${stripDebugListTarget[*]:-}
27 stripAllList=${stripAllList[*]:-}
28 stripAllListTarget=${stripAllListTarget[*]:-}
29
30 local i
31 for i in ${!stripCmds[@]}; do
32 local -n flag="${flags[$i]}"
33 local -n debugDirList="${debugDirs[$i]}"
34 local -n allDirList="${allDirs[$i]}"
35 local -n stripCmd="${stripCmds[$i]}"
36 local -n ranlibCmd="${ranlibCmds[$i]}"
37
38 # `dontStrip` disables them all
39 if [[ "${dontStrip-}" || "${flag-}" ]] || ! type -f "${stripCmd-}" 2>/dev/null 1>&2
40 then continue; fi
41
42 stripDirs "$stripCmd" "$ranlibCmd" "$debugDirList" "${stripDebugFlags[*]:--S -p}"
43 stripDirs "$stripCmd" "$ranlibCmd" "$allDirList" "${stripAllFlags[*]:--s -p}"
44 done
45}
46
47stripDirs() {
48 local cmd="$1"
49 local ranlibCmd="$2"
50 local paths="$3"
51 local stripFlags="$4"
52 local excludeFlags=()
53 local pathsNew=
54
55 [ -z "$cmd" ] && echo "stripDirs: Strip command is empty" 1>&2 && exit 1
56 [ -z "$ranlibCmd" ] && echo "stripDirs: Ranlib command is empty" 1>&2 && exit 1
57
58 local pattern
59 if [ -n "${stripExclude:-}" ]; then
60 for pattern in "${stripExclude[@]}"; do
61 excludeFlags+=(-a '!' '(' -name "$pattern" -o -wholename "$prefix/$pattern" ')' )
62 done
63 fi
64
65 local p
66 for p in ${paths}; do
67 if [ -e "$prefix/$p" ]; then
68 pathsNew="${pathsNew} $prefix/$p"
69 fi
70 done
71 paths=${pathsNew}
72
73 if [ -n "${paths}" ]; then
74 echo "stripping (with command $cmd and flags $stripFlags) in $paths"
75 local striperr
76 striperr="$(mktemp --tmpdir="$TMPDIR" 'striperr.XXXXXX')"
77 # Make sure we process files only once. `strip`ping the same file through different
78 # links in parallel can corrupt it:
79 # https://github.com/NixOS/nixpkgs/issues/246147#issuecomment-1657072039
80
81 # Do not strip lib/debug. This is a directory used by setup-hooks/separate-debug-info.sh.
82 # Print out each file's device and inode (which will be the same if two files are hardlinked
83 # or are the same file found through different symlinks), followed by its path...
84 find $paths -type f "${excludeFlags[@]}" -a '!' -path "$prefix/lib/debug/*" -printf '%D-%i,%p\0' |
85 # ... sort/uniq by device/inode, then cut them out and keep the path, ...
86 sort -t, -k1,1 -u -z | cut -d, -f2- -z |
87 # and finally strip each unique path in parallel.
88 xargs -r -0 -n1 -P "$NIX_BUILD_CORES" -- $cmd $stripFlags 2>"$striperr" || exit_code=$?
89 # xargs exits with status code 123 if some but not all of the
90 # processes fail. We don't care if some of the files couldn't
91 # be stripped, so ignore specifically this code.
92 [[ "$exit_code" = 123 || -z "$exit_code" ]] || (cat "$striperr" 1>&2 && exit 1)
93
94 rm "$striperr"
95 # 'strip' does not normally preserve archive index in .a files.
96 # This usually causes linking failures against static libs like:
97 # ld: ...-i686-w64-mingw32-stage-final-gcc-13.0.0-lib/i686-w64-mingw32/lib/libstdc++.dll.a:
98 # error adding symbols: archive has no index; run ranlib to add one
99 # Restore the index by running 'ranlib'.
100 find $paths -name '*.a' -type f -exec $ranlibCmd '{}' \; 2>/dev/null
101 fi
102}