[Rd] Bug with zlib version checking for zlib >= 1.2.10, R version 3.3.2

[Henrik Bengtsson]

This has been fixed (https://cran.r-project.org/doc/manuals/r-devel/NEWS.html):

CHANGES IN R 3.3.2 patched:

INSTALLATION on a UNIX-ALIKE

* The configure check for the zlib version is now robust to versions
longer than 5 characters, including 1.2.10.

in SVN r71889 (2017-01-03):

https://github.com/wch/r-source/commit/a0fe05ce9d0937ad2334bb370785cb22c71e592b

/Henrik


On Sun, Feb 12, 2017 at 3:51 PM, Justin Bedő <cu at cua0.org> wrote:
>
> Hi,
>
> Posting here as bugzilla is closed to registration.
> The zlib version checking code does not handle double digits for the
> patch version in the semantic versioning scheme. Consequently, a
> ./configure fails when using a zlib version ≥ 1.5.10. I suggest
> something like the following patch:
>
> --- a/m4/R.m4
> +++ b/m4/R.m4
> @@ -3116,7 +3116,7 @@ int main() {
>  #ifdef ZLIB_VERSION
>  /* Work around Debian bug: it uses 1.2.3.4 even though there was no such
>     version on the master site zlib.net */
> -  exit(strncmp(ZLIB_VERSION, "1.2.5", 5) < 0);
> +  exit(strncmp(ZLIB_VERSION, "1.2.5", 5) < 0 && (strlen(ZLIB_VERSION) < 6 || strncmp(ZLIB_VERSION, "1.2.10", 6) < 0));
>  #else
>    exit(1);
>  #endif
>
> This could of course be improved to properly parse the string.
>
> Cheers,
>
> Justin
>
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