nixpkgs/pkgs/build-support/setup-hooks/strip.sh

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# 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 $out anyways---if it does, that's a bigger problem that a lack of
# stripping will help catch.
local -ra flags=(dontStripHost dontStripTarget)
local -ra stripCmds=(STRIP TARGET_STRIP)
# Optimization
if [[ "$STRIP" == "$TARGET_STRIP" ]]; then
dontStripTarget+=1
fi
local i
for i in ${!stripCmds[@]}; do
local -n flag="${flags[$i]}"
local -n stripCmd="${stripCmds[$i]}"
# `dontStrip` disables them all
if [[ "$dontStrip" || "$flag" ]] || ! type -f "$stripCmd" 2>/dev/null
then continue; fi
stripDebugList=${stripDebugList:-lib lib32 lib64 libexec bin sbin}
if [ -n "$stripDebugList" ]; then
stripDirs "$stripCmd" "$stripDebugList" "${stripDebugFlags:--S}"
fi
stripAllList=${stripAllList:-}
if [ -n "$stripAllList" ]; then
stripDirs "$stripCmd" "$stripAllList" "${stripAllFlags:--s}"
fi
done
}
stripDirs() {
local cmd="$1"
local dirs="$2"
local stripFlags="$3"
local dirsNew=
local d
for d in ${dirs}; do
if [ -d "$prefix/$d" ]; then
dirsNew="${dirsNew} $prefix/$d "
fi
done
dirs=${dirsNew}
if [ -n "${dirs}" ]; then
header "stripping (with command $cmd and flags $stripFlags) in$dirs"
find $dirs -type f -print0 | xargs -0 ${xargsFlags:--r} $cmd $commonStripFlags $stripFlags 2>/dev/null || true
stopNest
fi
}