[DOC] Bump autoconf requirement #13910
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Autoconf 2.70 or later is required to properly handle multi-line AC_CHECK_FUNCS lists. The recent changes in ruby#13907 that split function lists across multiple lines require autoconf 2.70's improved whitespace handling. Without autoconf 2.70+, the configure script generation fails with syntax errors like: ../configure: line 29306: syntax error near unexpected token `pthread_attr_get_np' This is because autoconf 2.69 and earlier don't properly handle multi-line function lists in AC_CHECK_FUNCS without backslash continuations, while 2.70+ requires square brackets and handles newlines correctly.
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Is it possible to make the build fail with a better message in addition to bumping the documentation? Like detect an old autoconf |
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Thank you. |
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@tekknolagi It would be possible by bumping up |
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I'm not familiar with the criteria required to bump Ruby's build dependencies. But given that autoconf |
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For reference, debian bullseye only contains autoconf 2.69: https://packages.debian.org/bullseye/autoconf |
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This reverts commit 32bfb61, that requires autoconf 2.70's improved whitespace handling. It is too early for some platforms yet. Fix rubyGH-13910
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Autoconf 2.70 or later is required to properly handle multi-line AC_CHECK_FUNCS lists. The recent changes in #13907 that split function lists across multiple lines require autoconf 2.70's improved whitespace handling (ref).
Without autoconf 2.70+, the configure script generation fails with syntax errors like:
../configure: line 29306: syntax error near unexpected token `pthread_attr_get_np'
This is because autoconf 2.69 and earlier don't properly handle multi-line function lists in AC_CHECK_FUNCS without backslash continuations, while 2.70+ requires square brackets and handles newlines correctly.
cc @nobu