94c7bf576a
Currently, separate-debug-info adds a debug output, and the build fail when it is not created. the output is only created when at least one elf file is stripped. As a result, adding separateDebugInfo = true on a lib will break the static build (unless the lib also contains an executable). In order to not have to remember to add an exception every time, let's just create the debug output unconditionally.
46 lines
1.5 KiB
Bash
46 lines
1.5 KiB
Bash
export NIX_SET_BUILD_ID=1
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export NIX_LDFLAGS+=" --compress-debug-sections=zlib"
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export NIX_CFLAGS_COMPILE+=" -ggdb -Wa,--compress-debug-sections"
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export RUSTFLAGS+=" -g"
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fixupOutputHooks+=(_separateDebugInfo)
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_separateDebugInfo() {
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[ -e "$prefix" ] || return 0
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local dst="${debug:-$out}"
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if [ "$prefix" = "$dst" ]; then return 0; fi
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# in case there is nothing to strip, don't fail the build
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mkdir -p "$dst"
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dst="$dst/lib/debug/.build-id"
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# Find executables and dynamic libraries.
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local i
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while IFS= read -r -d $'\0' i; do
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if ! isELF "$i"; then continue; fi
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# Extract the Build ID. FIXME: there's probably a cleaner way.
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local id="$($READELF -n "$i" | sed 's/.*Build ID: \([0-9a-f]*\).*/\1/; t; d')"
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if [ "${#id}" != 40 ]; then
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echo "could not find build ID of $i, skipping" >&2
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continue
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fi
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# Extract the debug info.
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echo "separating debug info from $i (build ID $id)"
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mkdir -p "$dst/${id:0:2}"
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# This may fail, e.g. if the binary is for a different
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# architecture than we're building for. (This happens with
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# firmware blobs in QEMU.)
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(
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$OBJCOPY --only-keep-debug "$i" "$dst/${id:0:2}/${id:2}.debug"
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# Also a create a symlink <original-name>.debug.
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ln -sfn ".build-id/${id:0:2}/${id:2}.debug" "$dst/../$(basename "$i")"
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) || rmdir -p "$dst/${id:0:2}"
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done < <(find "$prefix" -type f -print0)
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}
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