AM_ICONV failures on minimal gconv glibc systems

[Kevin J. McCarthy]

Recently, I had someone report a configure failure in my project, in 
AM_ICONV's "checking for working iconv" test.  This was on a GNU/Linux 
distribution (Tiny Core Linux) using glibc, so they thought there 
shouldn't be any issues with the iconv implementation.

After some investigation, it turned out that only the main 
"gconv-modules" were enabled on their system.  None of the gconv modules 
in gconv-modules-extra.conf (now split out since glibc-2.34) were 
enabled.

AM_ICONV has a "Test against HP-UX 11.11 bug: No converter from EUC-JP 
to UTF-8 is provided." that was failing, because the main gconv-modules 
no longer contains EUC-JP.

I wonder if that test in AM_ICONV is relevant or useful anymore.  Is an 
iconv with just the modules in "gconv-modules" considered "working"? 
Would the gnulib developers consider removing that test?

Thank you,

-Kevin