44 lines
2.1 KiB
Bash
44 lines
2.1 KiB
Bash
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#!/usr/bin/env bash
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# expat: bare cmake picks up the Debian multiarch libdir.
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#
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# The PKGBUILD calls cmake directly -- NOT arch-cmake -- so the devtools
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# stand-in that already passes -DCMAKE_INSTALL_LIBDIR=lib never runs. The
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# option array only pins the prefix.
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#
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# expat's CMakeLists include(GNUInstallDirs), and GNUInstallDirs picks its
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# default LIBDIR by sniffing the HOST: it sees /etc/debian_version, finds no
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# /etc/arch-release, and sets lib/<multiarch> = lib/s390x-linux-gnu. Because
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# CMAKE_INSTALL_LIBDIR was never given, that default wins and is cached.
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#
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# The build then exits 0 and the package installs cleanly. It is the ARTEFACT
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# that is wrong -- everything LIBDIR-derived lands off Arch's search paths:
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#
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# usr/lib/s390x-linux-gnu/libexpat.so.1.12.3 ld.so reads /usr/lib only
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# usr/lib/s390x-linux-gnu/pkgconfig/expat.pc pkgconf reads /usr/lib only
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# usr/lib/s390x-linux-gnu/cmake/expat-2.8.3/ find_package(EXPAT) misses
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#
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# and usr/lib itself holds nothing but that subdirectory. expat is a
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# dependency of cmake, python, gdb and fontconfig, so this does not fail
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# loudly here -- it fails later, in whatever links against -lexpat.
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#
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# The fix is to state the libdir the stand-in would have stated. Passing it on
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# the command line makes it a cache entry BEFORE GNUInstallDirs runs, and
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# GNUInstallDirs only fills in defaults for variables that are still unset.
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#
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# One configure call, so exactly one insertion: assert the count rather than
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# rewriting every -D.
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set -euo pipefail
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python3 - <<'PY'
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import io
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s = io.open("PKGBUILD", encoding="utf-8").read()
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assert "CMAKE_INSTALL_LIBDIR" not in s, "expat: libdir already set, hook ran twice"
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anchor = " -D CMAKE_INSTALL_PREFIX=/usr\n"
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n = s.count(anchor)
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assert n == 1, "expat: expected 1 cmake option block, found %d" % n
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s = s.replace(anchor, anchor + " -D CMAKE_INSTALL_LIBDIR=lib\n", 1)
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io.open("PKGBUILD", "w", encoding="utf-8").write(s)
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PY
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[ "$(grep -c 'CMAKE_INSTALL_LIBDIR=lib' PKGBUILD)" = 1 ] || {
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echo "expat: libdir not pinned exactly once" >&2; exit 1; }
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echo "expat: CMAKE_INSTALL_LIBDIR=lib (bare cmake bypasses arch-cmake)"
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