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43 lines
1.7 KiB
43 lines
1.7 KiB
3 years ago
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#!/bin/bash
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# Auto-generating dependencies for glibc development snapshots.
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#
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# A glibc development snapshot (say version 2.33.9000) may define
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# symbols in its under-development symbol version (GLIBC_2.34). RPM
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# automatically derives RPM dependencies such as
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# libc.so.6(GLIBC_2.34)(64bit) from that. While the GLIBC_2.34
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# version is under development, these dependencies may be inaccurate
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# and could be satisfied by glibc RPM package versions that lack the
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# symbols because they were created from an earlier development
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# snapshot that had some other GLIBC_2.34 symbols. Therefore, if the
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# latest, under-development ELF symbol version is detected, this
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# dependency generator adds an explicit RPM dependencies on the glibc
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# packaging version against which an RPM package is built.
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#
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# This script runs for the glibc build itself. In this case, it may
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# produce a >= dependency on the build-time glibc, but there will also
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# be an (potentially indirect) = dependency, which takes precedence.
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set -e
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set -o pipefail
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searching=true
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# Pre-filter using eu-elfclassify, to skip kernel modules.
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eu-elfclassify --loadable --file --stdin --print | while read path; do
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# Assume that all dynamically linked objects depend on glibc in
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# some way.
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if $searching; then
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# Undefined symbols within latest, under-development
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# (changing) symbol versions trigger the versioned RPM
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# dependency. Do not use "egrep -q" to keep reading from the
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# pipe, avoiding a spurious EPIPE error in eu-readelf.
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if eu-readelf -s "$path" \
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| egrep '\sUNDEF\s.*@''@SYMVER@(\s|$)' >/dev/null
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then
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echo 'glibc >= @VERSION@-@RELEASE@'
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# Stop searching after the first match, but keep reading from
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# the pipe.
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searching=false
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fi
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fi
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done
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