This hack makes Guile default to UTF-8.  This avoids calls to
`iconv_open'; `iconv_open' tries to open shared objects that aren't
available during bootstrap, so using UTF-8 avoids that (and UTF-8 has
built-in conversions in glibc, too.)

diff --git a/libguile/bytevectors.c b/libguile/bytevectors.c
index 0ac5ea6a6..f73301e2f 100644
--- a/libguile/bytevectors.c
+++ b/libguile/bytevectors.c
@@ -1931,7 +1931,7 @@ utf_encoding_name (char *name, size_t utf_width, SCM endianness)
   if (scm_i_is_narrow_string (str))                                     \
     {                                                                   \
       err = mem_iconveh (scm_i_string_chars (str), c_strlen,            \
-                         "ISO-8859-1", c_utf_name,                      \
+                         "UTF-8", c_utf_name,                      \
                          iconveh_question_mark, NULL,                   \
                          &c_utf, &c_utf_len);                           \
       if (SCM_UNLIKELY (err))                                           \
diff --git a/libguile/ports.c b/libguile/ports.c
index 45e62f4e4..42012f3aa 100644
--- a/libguile/ports.c
+++ b/libguile/ports.c
@@ -974,7 +974,9 @@ canonicalize_encoding (const char *enc)
   char *ret;
   int i;
 
-  if (!enc || encoding_matches (enc, sym_ISO_8859_1))
+  if (enc == NULL)
+    return sym_UTF_8;
+  if (encoding_matches (enc, sym_ISO_8859_1))
     return sym_ISO_8859_1;
   if (encoding_matches (enc, sym_UTF_8))
     return sym_UTF_8;
@@ -4198,7 +4200,7 @@ scm_init_ports (void)
     scm_c_define ("%default-port-conversion-strategy",
                   scm_make_fluid_with_default (sym_substitute));
   /* Use the locale as the default port encoding.  */
-  scm_i_set_default_port_encoding (locale_charset ());
+  scm_i_set_default_port_encoding ("UTF-8");
 
   scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION,
                             "scm_init_ice_9_ports",
diff --git a/libguile/strings.c b/libguile/strings.c
index 056b4c99f..63a6c050d 100644
--- a/libguile/strings.c
+++ b/libguile/strings.c
@@ -1579,7 +1579,7 @@ scm_i_default_string_failed_conversion_handler (void)
 SCM
 scm_from_locale_stringn (const char *str, size_t len)
 {
-  return scm_from_stringn (str, len, locale_charset (),
+  return scm_from_stringn (str, len, "UTF-8",
                            scm_i_default_string_failed_conversion_handler ());
 }
 
@@ -1907,7 +1907,7 @@ char *
 scm_to_locale_stringn (SCM str, size_t *lenp)
 {
   return scm_to_stringn (str, lenp,
-                         locale_charset (),
+                         "UTF-8",
                          scm_i_default_string_failed_conversion_handler ());
 }
 
@@ -2195,7 +2195,7 @@ scm_to_stringn (SCM str, size_t *lenp, const char *encoding,
     scm_wrong_type_arg_msg (NULL, 0, str, "string");
 
   if (encoding == NULL)
-    encoding = "ISO-8859-1";
+    encoding = "UTF-8";
 
   if (c_strcasecmp (encoding, "UTF-8") == 0)
     /* This is the most common case--e.g., when calling libc bindings
@@ -2247,7 +2247,7 @@ scm_to_stringn (SCM str, size_t *lenp, const char *encoding,
   if (scm_i_is_narrow_string (str))
     {
       ret = mem_iconveh (scm_i_string_chars (str), ilen,
-                         "ISO-8859-1", encoding,
+                         "UTF-8", encoding,
                          (enum iconv_ilseq_handler) handler, NULL,
                          &buf, &len);
 

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
</span></span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2022-10-22 01:46:55 +0200'>2022-10-22</span></td><td><a href='/guix/commit/tests/graph.scm?id=a3619079f95213c4f983e69210ed12b38fd31022'>Remove now unnecessary uses of (guix grafts).</a><span class='msg-avail'>...<span class='msg-tooltip'>These modules would use (guix grafts) just to access '%graft?' and
related bindings, which are now in (guix store).

* gnu/ci.scm,
guix/gexp.scm,
guix/lint.scm,
guix/scripts.scm,
guix/scripts/archive.scm,
guix/scripts/build.scm,
guix/scripts/challenge.scm,
guix/scripts/deploy.scm,
guix/scripts/environment.scm,
guix/scripts/home.scm,
guix/scripts/pack.scm,
guix/scripts/package.scm,
guix/scripts/pull.scm,
guix/scripts/size.scm,
guix/scripts/system.scm,
guix/scripts/weather.scm,
tests/builders.scm,
tests/channels.scm,
tests/cpan.scm,
tests/derivations.scm,
tests/gexp.scm,
tests/graph.scm,
tests/guix-daemon.sh,
tests/monads.scm,
tests/pack.scm,
tests/packages.scm,
tests/profiles.scm,
tests/system.scm: Remove #:use-module (guix grafts).
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-07-01 23:29:16 +0200'>2022-07-01</span></td><td><a href='/guix/commit/tests/graph.scm?id=bee2c369fa2a3d51e6a1218d1b1a0ee86528674a'>tests: Adjust 'guix graph' test to latest OCaml changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/graph.scm ("reverse bag DAG"): Adjust to latest OCaml changes by
looking at dune/ocaml-camomile/ocaml-utop.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-02-05 08:02:30 +0100'>2022-02-05</span></td><td><a href='/guix/commit/tests/graph.scm?id=45082b9a8c12af285f4386538fc7acc4668cb11c'>tests: Assert that cyclic graphs can be produced.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/graph.scm ("package DAG, oops it was a cycle"): New test.
</span></span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2021-09-21 15:15:52 +0200'>2021-09-21</span></td><td><a href='/guix/commit/tests/graph.scm?id=5b32ad4f6f555d305659cee825879df075b06331'>graph: Add '--max-depth'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/graph.scm (export-graph): Add #:max-depth and honor it, adding
'depths' argument to 'loop'.
* guix/scripts/graph.scm (%options, show-help): Add '--max-depth'.
(%default-options): Add 'max-depth'.
(guix-graph): Pass #:max-depth to 'export-graph'.
* tests/graph.scm ("package DAG, limited depth"): New test.
* doc/guix.texi (Invoking guix graph): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-10-20 16:30:15 +0200'>2020-10-20</span></td><td><a href='/guix/commit/tests/graph.scm?id=a9fd59dbd2d32e08c9479ac026b99b5c1dbbb0db'>graph: Adjust test for recent OCaml changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 339177956affdc471832750a3805b74356487e93.

* tests/graph.scm ("reverse bag DAG"): Look for "ocaml4.07-dune" rather
than "dune".
</span></span></td><td>Ludovic Courtès</td></tr>