Hi Akim,

> gl_SUBSTS([
>   GNULIB_ISWBLANK=0
>   GNULIB_ISWDIGIT=0
>   GNULIB_ISWXDIGIT=0
>   GNULIB_WCTYPE=0
>   GNULIB_ISWCTYPE=0
>   GNULIB_WCTRANS=0
>   GNULIB_TOWCTRANS=0
> ])
> 
> which does not, to my eyes, suffer from all the defects you see.

Yes, it does not degrade the ability to search for assignments.

But it goes against the general processing of Autoconf:

For an Autoconf macro, the input consists of identifier and shell statements.
The output is shell, and the shell statements given as arguments appear
in the output, unmodified except for m4 substitutions. Instead of a simple
shell statement, I can always use a complex shell statement instead. E.g.
  AM_CONDITIONAL([WINDOWS_NATIVE], [test $is_windows_native = yes])

gl_SUBSTS would analyze its shell statement arguments. Other Autoconf
macros don't do this. It is not clear what would be the result of
  gl_SUBSTS([
    if test $use_ctype_modules = yes; then
      GNULIB_ISBLANK=0
    fi
    if test $use_wctype_modules = yes; then
      GNULIB_ISWBLANK=0
    fi
  ])

Bruno


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