Re: Build m4 on RHEL 8

[Eric Blake]

On Tue, Jul 06, 2021 at 04:38:41PM +0000, Duncan,Michael wrote:
> Hello,
> 
> I am attempting to build a bison 3.7 module on a HPC cluster running RHEL 8.1
> 
> bison 3.7 requires gcc and m4 modules to build, so I am attempting to build 
> the m4 module version 1.4.18

Try using m4 1.4.19 instead.
https://lists.gnu.org/archive/html/m4-announce/2021-05/msg00002.html

>   CC       freadahead.o
> freadahead.c: In function 'freadahead':
> freadahead.c:92:3: error: #error "Please port gnulib freadahead.c to your 
> platform! Look at the definition of fflush, fread, ungetc on your system, 
> then report this to bug-gnulib."
>    92 |  #error "Please port gnulib freadahead.c to your platform! Look at 
> the definition of fflush, fread, ungetc on your system, then report this to 
> bug-gnulib."
>       |   ^~~~~

Known issue with older gnulib, that has since been resolved by the
newer m4 release using newer gnulib.

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Eric Blake, Principal Software Engineer
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