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Use the autoconf- or system-provided off_t rather than redetecting. #8843

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merged 1 commit into from Jul 31, 2019

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stedolan
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Using a 64-bit file offset on a 32-bit system is broken in 4.08, because the use of off_t is guarded by HAS_OFF_T, which is not defined by the configure script. (It's mentioned in configure.ac, but there's no corresponding template line in s.h.in).

As suggested by @rwmjones in #8841, this just uses off_t unconditionally. (Except on Windows, where off_t is weird and broken).

@rwmjones
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Patch looks sensible to me.

@gasche
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gasche commented Jul 29, 2019

cc @Octachron: would that be a candidate for 4.08.1?

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@xavierleroy xavierleroy left a comment

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Looks very good to me. The type off_t is part of POSIX 1-2008, perhaps earlier, so it should be available everywhere except under Windows.

I'm in favor of backporting this fix to 4.09, perhaps even to 4.08.1.

@Octachron
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Then let's backport this fix in 4.08.1 since a rc3 is already planned.

@rwmjones
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I'm currently rebuilding the Fedora packages with this patch to see if there are any problems.

@xavierleroy
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off_t was already there in POSIX.1 back in 1990. I'll merge in trunk, check CI, then cherry-pick to 4.09 and 4.08.1.

@xavierleroy xavierleroy merged commit 5e4b55d into ocaml:trunk Jul 31, 2019
xavierleroy pushed a commit that referenced this pull request Jul 31, 2019
xavierleroy pushed a commit that referenced this pull request Jul 31, 2019
@xavierleroy
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Cherry-picked to 4.08 branch (25b9020) and to 4.09 branch (18793a6). Hope I didn't mess it up!

@Octachron
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It looks fine, thanks!

@rwmjones
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I'm (still) testing the Fedora ocaml packages. It's going much slower than I expected because our build system is having problems.

@Octachron
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Ok, I will wait a bit for the build result before releasing the rc3.

@rwmjones
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I can confirm that this fixes the original bug (in supermin).

@Octachron
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Thanks for the confirmation!

hannesm added a commit to hannesm/ocaml-freestanding that referenced this pull request Aug 3, 2019
… by posix)

since ocaml/ocaml#8843 (>= 4.08.1+rc3) off_t in sys/types.h is required
lpw25 pushed a commit to janestreet/ocaml that referenced this pull request Aug 13, 2019
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5 participants