>> AFAICS, from the source and its effect on configure, AC_DISABLE_STATIC
>> *permanently* disables the possibility to create static library. The
>> documentation says it changes the *default* value for --disable-static.
> Apparently this leads to some problems. For example, if the user
> selects --enable-shared --disable-static and something is unable to
> build as shared, then the build simply fails. I learned this the hard
> way under Cygwin and MinGW.
I'm unsure I understand what you're actually suggesting: that the
documented use should not be implemented? It seems to me that
implementing it actually allows the installer to change the default
behavior, while having a static AC_DISABLE_STATIC prevents any form of
late decision. (But that might be what you were pointing out :)