25 lines
1.2 KiB
Bash
25 lines
1.2 KiB
Bash
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#!/usr/bin/env bash
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# gcc: keep only the front ends that bootstrap without an existing compiler
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# of the same language.
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#
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# configure: error: GNAT is required to build ada
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# configure: error: GDC is required to build d
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#
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# Ada and D are written in themselves: building their front ends needs an
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# existing Ada or D compiler of a compatible vintage. Ubuntu ships gnat, but
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# not one GCC 15 accepts, and D has no bootstrap compiler here at all.
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# Modula-2 and COBOL have the same shape of problem.
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#
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# Nothing in a core bootstrap -- and nothing in ERPLibre -- is written in any
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# of them. C, C++, Fortran, LTO and the Objective-C front ends cover
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# everything the rest of this port compiles.
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#
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# STAGE 1 CONCESSION, not a permanent one. Once the port is self-hosting its
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# own gcc can bootstrap the others, and this hook should be revisited.
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set -euo pipefail
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sed -i 's/^\(\s*--enable-languages=\).*\\$/\1c,c++,fortran,lto,objc,obj-c++ \\/' PKGBUILD
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grep -m1 -- '--enable-languages' PKGBUILD
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grep -qE 'enable-languages=[^ ]*(ada|,d,|m2|cobol)' PKGBUILD && {
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echo "gcc: a self-hosted front end is still enabled" >&2; exit 1; }
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echo "gcc: front ends reduced to those that bootstrap from C"
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