Re: cannot build bison-3.3.90 on Solaris 11.3, even with GNU m4

[Akim Demaille]

Hi Bruno,

Kiyoshi helped tracking this down.  In particular this trace:

> $ make V=1 < /dev/null
> rm -f examples/c/reccalc/scan.stamp examples/c/reccalc/scan.stamp.tmp
> /opt/GNU_Buildutils/coreutils/bin/mkdir -p examples/c/reccalc
> touch examples/c/reccalc/scan.stamp.tmp
> flex -o examples/c/reccalc/scan.c --header-file=examples/c/reccalc/scan.h 
> <stdin>:1: premature EOF
> *** Error code 1
> make: Fatal error: Command failed for target `examples/c/reccalc/scan.stamp'


allowed to spot the problem: the use of $< in that rule, which is not a pattern 
rule (so $< expands to nothing).

This was addressed here:

https://lists.gnu.org/archive/html/bison-patches/2019-05/msg00017.html

and I submitted a syntax-check for that to gnulib here:

https://lists.gnu.org/archive/html/bug-gnulib/2019-05/msg00095.html

Cheers!