Re: Guile integration and UTF-8

Hi,

Lars Ljung <[email protected]> skribis:

> 2) This simple example fails because of the UTF-8 string:
>
> all:
> 	@echo $(guile "Hej, världen!")
>
> The result is:
>
> ERROR: Unknown object: "Hej, världen!".

Make uses ‘scm_c_eval_string’, which expects to be passed a string in
the current locale encoding.

So, if you have a UTF-8-encoded Makefile, but run ‘make’ with a
ISO-8859-1 locale, the string will be incorrectly decoded.

In particular, ‘to-string-maybe’ in gmk-default.scm will consider that
some characters are not printable, leading to the “Unknown object” error.

The fix would be to convert the string passed to $(guile ...) from a
fixed encoding, rather than from the current locale encoding.  For
instance:

  scm_eval_string (scm_from_utf8_string (argv[0]))

Better yet, use ‘scm_file_encoding’ to determine the encoding of a
makefile based on the presence of -*- coding -*- cookies (info "(guile)
Character Encoding of Source Files").

HTH,
Ludo’.

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