On Thu, Aug 25, 2022 at 04:54:09AM -0400, Philip McGrath wrote:
> * gnu/packages/patches/racket-backport-8.6-zuo.patch,
> gnu/packages/patches/racket-zuo-bin-sh.patch: New patches.
> * gnu/local.mk (dist_patch_DATA): Add them.
> * gnu/packages/racket.scm (%zuo-version): New variable.
> (zuo): New variable.
> ---
>  gnu/local.mk                                  |   2 +
>  .../patches/racket-backport-8.6-zuo.patch     | 481 ++++++++++++++++++
>  gnu/packages/patches/racket-zuo-bin-sh.patch  |  74 +++
>  gnu/packages/racket.scm                       |  51 ++
>  4 files changed, 608 insertions(+)
>  create mode 100644 gnu/packages/patches/racket-backport-8.6-zuo.patch
>  create mode 100644 gnu/packages/patches/racket-zuo-bin-sh.patch
> 
> diff --git a/gnu/local.mk b/gnu/local.mk
> index babd54c8c6..c9c3061b33 100644
> --- a/gnu/local.mk
> +++ b/gnu/local.mk
> @@ -1769,8 +1769,10 @@ dist_patch_DATA =						\
>    %D%/packages/patches/ripperx-missing-file.patch		\
>    %D%/packages/patches/rpcbind-CVE-2017-8779.patch		\
>    %D%/packages/patches/rtags-separate-rct.patch			\
> +  %D%/packages/patches/racket-backport-8.6-zuo.patch		\
>    %D%/packages/patches/racket-chez-scheme-bin-sh.patch		\
>    %D%/packages/patches/racket-rktio-bin-sh.patch		\
> +  %D%/packages/patches/racket-zuo-bin-sh.patch			\
>    %D%/packages/patches/remake-impure-dirs.patch			\
>    %D%/packages/patches/restic-0.9.6-fix-tests-for-go1.15.patch	\
>    %D%/packages/patches/retroarch-LIBRETRO_DIRECTORY.patch	\
> diff --git a/gnu/packages/patches/racket-backport-8.6-zuo.patch b/gnu/packages/patches/racket-backport-8.6-zuo.patch
> new file mode 100644
> index 0000000000..b86679b7ec
> --- /dev/null
> +++ b/gnu/packages/patches/racket-backport-8.6-zuo.patch
> @@ -0,0 +1,481 @@
> +From 8761fc06b188b9ca2f4b7f2b7d1235075c44a321 Mon Sep 17 00:00:00 2001
> +From: Matthew Flatt <mflatt@racket-lang.org>
> +Date: Sat, 23 Jul 2022 17:10:58 -0600
> +Subject: [PATCH 1/4] Zuo: support cross compilation via `configure` and
> + `CC_FOR_BUILD`
> +
> +(cherry picked from commit 798a989ba6d1a30c491a3120b2c2f1570ecab911)
> +---
> + racket/src/zuo/Makefile.in  |  7 ++++++-
> + racket/src/zuo/README.md    | 10 ++++++++++
> + racket/src/zuo/configure    | 15 +++++++++++++++
> + racket/src/zuo/configure.ac | 11 +++++++++++
> + 4 files changed, 42 insertions(+), 1 deletion(-)
> +
> +diff --git a/racket/src/zuo/Makefile.in b/racket/src/zuo/Makefile.in
> +index 5d16e145bf..747b584c5c 100644
> +--- a/racket/src/zuo/Makefile.in
> ++++ b/racket/src/zuo/Makefile.in
> +@@ -17,6 +17,11 @@ CPPFLAGS = @CPPFLAGS@
> + LDFLAGS = @LDFLAGS@
> + LIBS = @LIBS@
> + 
> ++CC_FOR_BUILD = @CC_FOR_BUILD@
> ++CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
> ++LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@
> ++LIBS_FOR_BUILD = @LIBS_FOR_BUILD@
> ++
> + EMBED_LIBS = @EMBED_LIBS@
> + 
> + .PHONY: zuos-to-run-and-install
> +@@ -24,7 +29,7 @@ zuos-to-run-and-install: zuo
> + 	./zuo . zuos-to-run-and-install
> + 
> + zuo: $(srcdir)/zuo.c
> +-	$(CC) $(CPPFLAGS) $(CFLAGS) -DZUO_LIB_PATH='"'"$(srcdir)/lib"'"' -o zuo $(srcdir)/zuo.c $(LDFLAGS) $(LIBS)
> ++	$(CC_FOR_BUILD) $(FLAGS_FOR_BUILD) -DZUO_LIB_PATH='"'"$(srcdir)/lib"'"' -o zuo $(srcdir)/zuo.c $(LDFLAGS_FOR_BUILD) $(LIBS_FOR_BUILD)
> + 
> + .PHONY: check
> + check: zuo
> +diff --git a/racket/src/zuo/README.md b/racket/src/zuo/README.md
> +index 17c88ee9ec..3aad504b7e 100644
> +--- a/racket/src/zuo/README.md
> ++++ b/racket/src/zuo/README.md
> +@@ -84,6 +84,16 @@ A boot image is machine-independent, whether in a stand-alone file or
> + embedded in `.c` source.
> + 
> + 
> ++Cross Compiling
> ++---------------
> ++
> ++If you use `./configure --host=...` to cross compile, then you will
> ++also need to add something like `CC_FOR_BUILD=cc` as a `./configure`
> ++argument to specify the compiler for a `zuo` to use on the build
> ++machine. If necessary, you can also specify `CFLAGS_FOR_BUILD`,
> ++`LDFLAGS_FOR_BUILD`, and/or `LIBS_FOR_BUILD`.
> ++
> ++
> + Embedding Zuo in Another Application
> + ------------------------------------
> + 
> +diff --git a/racket/src/zuo/configure b/racket/src/zuo/configure
> +index 1fa34a3fe8..575ce07d96 100755
> +--- a/racket/src/zuo/configure
> ++++ b/racket/src/zuo/configure
> +@@ -589,6 +589,10 @@ enable_embed="zuo"
> + ac_subst_vars='LTLIBOBJS
> + LIBOBJS
> + EMBED_LIBS
> ++LIBS_FOR_BUILD
> ++LDFLAGS_FOR_BUILD
> ++CFLAGS_FOR_BUILD
> ++CC_FOR_BUILD
> + OBJEXT
> + EXEEXT
> + ac_ct_CC
> +@@ -2584,6 +2588,17 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
> + ac_compiler_gnu=$ac_cv_c_compiler_gnu
> + 
> + 
> ++if test "${CC_FOR_BUILD}" = ""; then
> ++  CC_FOR_BUILD='$(CC) -O2'
> ++  CFLAGS_FOR_BUILD='$(CPPFLAGS) $(CFLAGS)'
> ++  LDFLAGS_FOR_BUILD='$(LDFLAGS)'
> ++  LIBS_FOR_BUILD='$(LIBS)'
> ++fi
> ++
> ++
> ++
> ++
> ++
> + 
> + { $as_echo "$as_me:${as_lineno-$LINENO}: zuo libraries to embed: \"${EMBED_LIBS}\"" >&5
> + $as_echo "$as_me: zuo libraries to embed: \"${EMBED_LIBS}\"" >&6;}
> +diff --git a/racket/src/zuo/configure.ac b/racket/src/zuo/configure.ac
> +index 89b3c6391d..598ff79629 100644
> +--- a/racket/src/zuo/configure.ac
> ++++ b/racket/src/zuo/configure.ac
> +@@ -25,6 +25,17 @@ AS_IF([test "x$enable_embed" = xno],
> + AC_PROG_MAKE_SET()
> + AC_PROG_CC
> + 
> ++if test "${CC_FOR_BUILD}" = ""; then
> ++  CC_FOR_BUILD='$(CC) -O2'
> ++  CFLAGS_FOR_BUILD='$(CPPFLAGS) $(CFLAGS)'
> ++  LDFLAGS_FOR_BUILD='$(LDFLAGS)'
> ++  LIBS_FOR_BUILD='$(LIBS)'
> ++fi
> ++AC_SUBST(CC_FOR_BUILD)
> ++AC_SUBST(CFLAGS_FOR_BUILD)
> ++AC_SUBST(LDFLAGS_FOR_BUILD)
> ++AC_SUBST(LIBS_FOR_BUILD)
> ++
> + AC_SUBST(EMBED_LIBS)
> + AC_MSG_NOTICE([zuo libraries to embed: "${EMBED_LIBS}"])
> + 
> +-- 
> +2.32.0
> +
> +
> +From f65194ea41eb472fbdd45d5f6c13eabe5e681704 Mon Sep 17 00:00:00 2001
> +From: Matthew Flatt <mflatt@racket-lang.org>
> +Date: Sat, 23 Jul 2022 17:47:03 -0600
> +Subject: [PATCH 2/4] Zuo: sort hash keys
> +
> +Printing in a sorted order is helpful to make things more
> +deterministic independent of symbol inputs. Making `hash-keys`
> +produce a sorted list generalizes that determinism.
> +
> +(cherry picked from commit 4e7ffd3b365d01c5d0993c0b3fd24c9623962edf)
> +---
> + racket/src/zuo/build.zuo              |  5 ++-
> + racket/src/zuo/tests/hash.zuo         |  8 ++--
> + racket/src/zuo/zuo-doc/lang-zuo.scrbl | 18 +++++++--
> + racket/src/zuo/zuo.c                  | 57 ++++++++++++++++++++++++++-
> + 4 files changed, 78 insertions(+), 10 deletions(-)
> +
> +diff --git a/racket/src/zuo/build.zuo b/racket/src/zuo/build.zuo
> +index c1b5e8ce66..129240120a 100644
> +--- a/racket/src/zuo/build.zuo
> ++++ b/racket/src/zuo/build.zuo
> +@@ -47,7 +47,10 @@
> +     (target (at-dir (add-exe name))
> +             (lambda (path token)
> +               (rule (list image_zuo.c
> +-                          (input-data-target 'config config)
> ++                          (input-data-target 'config (cons
> ++                                                      lib-path
> ++                                                      (map (lambda (key) (hash-ref config key))
> ++                                                           '(CC CPPFLAGS CFLAGS LDFLAGS LIBS))))
> +                           (quote-module-path))
> +                     (lambda ()
> +                       (define l (split-path path))
> +diff --git a/racket/src/zuo/tests/hash.zuo b/racket/src/zuo/tests/hash.zuo
> +index a35741c730..0d3d7f3af6 100644
> +--- a/racket/src/zuo/tests/hash.zuo
> ++++ b/racket/src/zuo/tests/hash.zuo
> +@@ -35,9 +35,7 @@
> + 
> + (check (hash-keys (hash)) '())
> + (check (hash-keys (hash 'a 1)) '(a))
> +-(check (let ([keys (hash-keys (hash 'a 1 'b 2))])
> +-         (or (equal? keys '(a b))
> +-             (equal? keys '(b a)))))
> ++(check (hash-keys (hash 'a 1 'b 2)) '(a b)) ; always in order
> + (check (length (hash-keys (hash 'a 1 'b 2 'c 3))) 3)
> + (check (length (hash-keys (hash 'a 1 'b 2 'a 3))) 2)
> + (check-arg-fail (hash-keys 0) "not a hash table")
> +@@ -50,3 +48,7 @@
> + (check (hash-keys-subset? (hash 'a 1 'b 2) (hash 'b 1)) #f)
> + (check-arg-fail (hash-keys-subset? 0 (hash)) "not a hash table")
> + (check-arg-fail (hash-keys-subset? (hash) 0) "not a hash table")
> ++
> ++;; print sorts keys alphabetically:
> ++(check (~a (hash 'a 1 'b 2)) "#hash((a . 1) (b . 2))")
> ++(check (~a (hash 'b 2 'a 1)) "#hash((a . 1) (b . 2))")
> +diff --git a/racket/src/zuo/zuo-doc/lang-zuo.scrbl b/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> +index 94641d041e..4605e47471 100644
> +--- a/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> ++++ b/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> +@@ -538,10 +538,20 @@ support to convert the textual form back into a hash table value.
> + 
> + Analogous to @realracket*[hash? hash hash-ref hash-set hash-remove
> + hash-keys hash-count hash-keys-subset?] from @racketmodname[racket].
> +-Besides being constrained to symbol keys, there is one additional
> +-difference: the third argument to @racket[hash-ref], when supplied,
> +-is always used as a value to return if a key is missing, as
> +-opposed to a failure thunk.}
> ++
> ++Besides being constrained to symbol keys, there are two additional
> ++differences:
> ++
> ++@itemlist[
> ++
> ++ @item{the third argument to @racket[hash-ref], when supplied, is
> ++       always used as a value to return if a key is missing, as
> ++       opposed to a failure thunk; and}
> ++
> ++ @item{the @racket[hash-keys] function returns interned keys sorted
> ++       alphabetically.}
> ++
> ++]}
> + 
> + 
> + @section{Procedures}
> +diff --git a/racket/src/zuo/zuo.c b/racket/src/zuo/zuo.c
> +index 2957d478af..88d5747326 100644
> +--- a/racket/src/zuo/zuo.c
> ++++ b/racket/src/zuo/zuo.c
> +@@ -1298,6 +1298,59 @@ static zuo_t *zuo_trie_keys(zuo_t *trie_in, zuo_t *accum) {
> +   return accum;
> + }
> + 
> ++/*======================================================================*/
> ++/* symbol-list sorting                                                  */
> ++/*======================================================================*/
> ++
> ++/* merge sort used to make hash printing deterministic */
> ++static zuo_t *zuo_symbol_list_sort(zuo_t *l_in) {
> ++  zuo_t *l, *left, *right, *first, *last;
> ++  zuo_uint_t len = 0, i;
> ++
> ++  for (l = l_in, len = 0; l != z.o_null; l = _zuo_cdr(l))
> ++    len++;
> ++
> ++  if (len < 2)
> ++    return l_in;
> ++
> ++  left = z.o_null;
> ++  for (l = l_in, i = len >> 1; i > 0; l = _zuo_cdr(l), i--)
> ++    left = zuo_cons(_zuo_car(l), left);
> ++  right = l;
> ++
> ++  left = zuo_symbol_list_sort(left);
> ++  right = zuo_symbol_list_sort(right);
> ++
> ++  first = last = z.o_null;
> ++  while ((left != z.o_null) && (right != z.o_null)) {
> ++    zuo_t *p;
> ++
> ++    if (strcmp(ZUO_STRING_PTR(((zuo_symbol_t *)_zuo_car(left))->str),
> ++               ZUO_STRING_PTR(((zuo_symbol_t *)_zuo_car(right))->str))
> ++        < 1) {
> ++      p = zuo_cons(_zuo_car(left), z.o_null);
> ++      left = _zuo_cdr(left);
> ++    } else {
> ++      p = zuo_cons(_zuo_car(right), z.o_null);
> ++      right = _zuo_cdr(right);
> ++    }
> ++
> ++    if (first == z.o_null)
> ++      first = p;
> ++    else
> ++      ((zuo_pair_t *)last)->cdr = p;
> ++    last = p;
> ++  }
> ++
> ++  ((zuo_pair_t *)last)->cdr = ((left != z.o_null) ? left : right);
> ++
> ++  return first;
> ++}
> ++
> ++static zuo_t *zuo_trie_sorted_keys(zuo_t *trie_in, zuo_t *accum) {
> ++  return zuo_symbol_list_sort(zuo_trie_keys(trie_in, accum));
> ++}
> ++
> + /*======================================================================*/
> + /* terminal support                                                     */
> + /*======================================================================*/
> +@@ -1571,7 +1624,7 @@ static void zuo_out(zuo_out_t *out, zuo_t *obj, zuo_print_mode_t mode) {
> +         out_string(out, "opaque");
> +       out_string(out, ">");
> +     } else if (obj->tag == zuo_trie_node_tag) {
> +-      zuo_t *keys = zuo_trie_keys(obj, z.o_null);
> ++      zuo_t *keys = zuo_trie_sorted_keys(obj, z.o_null);
> +       if (mode == zuo_print_mode) {
> +         out_string(out, "(hash");
> +         if (keys != z.o_null)
> +@@ -2587,7 +2640,7 @@ static zuo_t *zuo_hash_remove(zuo_t *ht, zuo_t *sym) {
> + 
> + static zuo_t *zuo_hash_keys(zuo_t *ht) {
> +   check_hash("hash-keys", ht);
> +-  return zuo_trie_keys(ht, z.o_null);
> ++  return zuo_trie_sorted_keys(ht, z.o_null);
> + }
> + 
> + static zuo_t *zuo_hash_keys_subset_p(zuo_t *ht, zuo_t *ht2) {
> +-- 
> +2.32.0
> +
> +
> +From f2eecaa1dd875479d2cf51566223b3d0d7b9f738 Mon Sep 17 00:00:00 2001
> +From: Matthew Flatt <mflatt@racket-lang.org>
> +Date: Sat, 23 Jul 2022 18:06:41 -0600
> +Subject: [PATCH 3/4] Zuo: check for nul characters in `string->symbol`
> +
> +(cherry picked from commit e20022ccfad40d0ba2e77aa75bc4f775018c781f)
> +---
> + racket/src/zuo/tests/symbol.zuo       |  3 +++
> + racket/src/zuo/zuo-doc/lang-zuo.scrbl |  4 ++-
> + racket/src/zuo/zuo.c                  | 37 +++++++++++++++++----------
> + 3 files changed, 29 insertions(+), 15 deletions(-)
> +
> +diff --git a/racket/src/zuo/tests/symbol.zuo b/racket/src/zuo/tests/symbol.zuo
> +index 7775aeeb04..5600a89755 100644
> +--- a/racket/src/zuo/tests/symbol.zuo
> ++++ b/racket/src/zuo/tests/symbol.zuo
> +@@ -19,3 +19,6 @@
> + (check (not (equal? 'apple (string->uninterned-symbol "apple"))))
> + (check-arg-fail (string->symbol 'apple) not-string)
> + (check-arg-fail (string->uninterned-symbol 'apple) not-string)
> ++
> ++(check-arg-fail (string->symbol "apple\0spice") "without a nul character")
> ++(check (symbol? (string->uninterned-symbol "apple\0spice")))
> +diff --git a/racket/src/zuo/zuo-doc/lang-zuo.scrbl b/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> +index 4605e47471..07dd5815b0 100644
> +--- a/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> ++++ b/racket/src/zuo/zuo-doc/lang-zuo.scrbl
> +@@ -500,7 +500,9 @@ back into Zuo.
> + )]{
> + 
> + Analogous to @realracket*[symbol? symbol->string string->symbol
> +-string->uninterned-symbol] from @racketmodname[racket].}
> ++string->uninterned-symbol] from @racketmodname[racket], but
> ++@racket[string->symbol] accepts only strings that do not contain the
> ++null character.}
> + 
> + 
> + @section{Hash Tables (Persistent Maps)}
> +diff --git a/racket/src/zuo/zuo.c b/racket/src/zuo/zuo.c
> +index 88d5747326..17f161826d 100644
> +--- a/racket/src/zuo/zuo.c
> ++++ b/racket/src/zuo/zuo.c
> +@@ -1323,7 +1323,7 @@ static zuo_t *zuo_symbol_list_sort(zuo_t *l_in) {
> + 
> +   first = last = z.o_null;
> +   while ((left != z.o_null) && (right != z.o_null)) {
> +-    zuo_t *p;
> ++    zuo_t *p, *s_left, *s_right;
> + 
> +     if (strcmp(ZUO_STRING_PTR(((zuo_symbol_t *)_zuo_car(left))->str),
> +                ZUO_STRING_PTR(((zuo_symbol_t *)_zuo_car(right))->str))
> +@@ -2573,8 +2573,28 @@ static zuo_t *zuo_substring(zuo_t *obj, zuo_t *start_i, zuo_t *end_i) {
> +   return zuo_sized_string((const char *)&((zuo_string_t *)obj)->s[s_idx], e_idx - s_idx);
> + }
> + 
> ++static int zuo_is_string_without_nul(zuo_t *obj) {
> ++  zuo_int_t i;
> ++
> ++  if ((obj->tag != zuo_string_tag)
> ++      || ZUO_STRING_LEN(obj) == 0)
> ++    return 0;
> ++
> ++  for (i = ZUO_STRING_LEN(obj); i--; ) {
> ++    if (((zuo_string_t *)obj)->s[i] == 0)
> ++      return 0;
> ++  }
> ++
> ++  return 1;
> ++}
> ++
> + static zuo_t *zuo_string_to_symbol(zuo_t *obj) {
> +-  check_string("string->symbol", obj);
> ++  if (!zuo_is_string_without_nul(obj)) {
> ++    const char *who = "string->symbol";
> ++    check_string(who, obj);
> ++    zuo_fail_arg(who, "string without a nul character", obj);
> ++  }
> ++
> +   return zuo_symbol_from_string(ZUO_STRING_PTR(obj), obj);
> + }
> + 
> +@@ -3577,18 +3597,7 @@ static void *zuo_envvars_block(const char *who, zuo_t *envvars)
> + #endif
> + 
> + static int zuo_is_path_string(zuo_t *obj) {
> +-  zuo_int_t i;
> +-
> +-  if ((obj->tag != zuo_string_tag)
> +-      || ZUO_STRING_LEN(obj) == 0)
> +-    return 0;
> +-
> +-  for (i = ZUO_STRING_LEN(obj); i--; ) {
> +-    if (((zuo_string_t *)obj)->s[i] == 0)
> +-      return 0;
> +-  }
> +-
> +-  return 1;
> ++  return zuo_is_string_without_nul(obj);
> + }
> + 
> + static zuo_t *zuo_path_string_p(zuo_t *obj) {
> +-- 
> +2.32.0
> +
> +
> +From de6618cb3819d25580e3cd400ea09c8cf4f673a9 Mon Sep 17 00:00:00 2001
> +From: Matthew Flatt <mflatt@racket-lang.org>
> +Date: Sat, 23 Jul 2022 19:50:46 -0600
> +Subject: [PATCH 4/4] Zuo: CPPFLAGS_FOR_BUILD, too
> +
> +(cherry picked from commit cf82706c4b298f654a04c4bc8d98dff39b62a2ac)
> +---
> + racket/src/zuo/Makefile.in  | 3 ++-
> + racket/src/zuo/configure    | 5 ++++-
> + racket/src/zuo/configure.ac | 4 +++-
> + 3 files changed, 9 insertions(+), 3 deletions(-)
> +
> +diff --git a/racket/src/zuo/Makefile.in b/racket/src/zuo/Makefile.in
> +index 747b584c5c..0376c038a8 100644
> +--- a/racket/src/zuo/Makefile.in
> ++++ b/racket/src/zuo/Makefile.in
> +@@ -19,6 +19,7 @@ LIBS = @LIBS@
> + 
> + CC_FOR_BUILD = @CC_FOR_BUILD@
> + CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
> ++CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
> + LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@
> + LIBS_FOR_BUILD = @LIBS_FOR_BUILD@
> + 
> +@@ -29,7 +30,7 @@ zuos-to-run-and-install: zuo
> + 	./zuo . zuos-to-run-and-install
> + 
> + zuo: $(srcdir)/zuo.c
> +-	$(CC_FOR_BUILD) $(FLAGS_FOR_BUILD) -DZUO_LIB_PATH='"'"$(srcdir)/lib"'"' -o zuo $(srcdir)/zuo.c $(LDFLAGS_FOR_BUILD) $(LIBS_FOR_BUILD)
> ++	$(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(CPPFLAGS_FOR_BUILD) -DZUO_LIB_PATH='"'"$(srcdir)/lib"'"' -o zuo $(srcdir)/zuo.c $(LDFLAGS_FOR_BUILD) $(LIBS_FOR_BUILD)
> + 
> + .PHONY: check
> + check: zuo
> +diff --git a/racket/src/zuo/configure b/racket/src/zuo/configure
> +index 575ce07d96..7ac453e3bc 100755
> +--- a/racket/src/zuo/configure
> ++++ b/racket/src/zuo/configure
> +@@ -591,6 +591,7 @@ LIBOBJS
> + EMBED_LIBS
> + LIBS_FOR_BUILD
> + LDFLAGS_FOR_BUILD
> ++CPPFLAGS_FOR_BUILD
> + CFLAGS_FOR_BUILD
> + CC_FOR_BUILD
> + OBJEXT
> +@@ -2590,7 +2591,8 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
> + 
> + if test "${CC_FOR_BUILD}" = ""; then
> +   CC_FOR_BUILD='$(CC) -O2'
> +-  CFLAGS_FOR_BUILD='$(CPPFLAGS) $(CFLAGS)'
> ++  CPPFLAGS_FOR_BUILD='$(CPPFLAGS)'
> ++  CFLAGS_FOR_BUILD='$(CFLAGS)'
> +   LDFLAGS_FOR_BUILD='$(LDFLAGS)'
> +   LIBS_FOR_BUILD='$(LIBS)'
> + fi
> +@@ -2600,6 +2602,7 @@ fi
> + 
> + 
> + 
> ++
> + { $as_echo "$as_me:${as_lineno-$LINENO}: zuo libraries to embed: \"${EMBED_LIBS}\"" >&5
> + $as_echo "$as_me: zuo libraries to embed: \"${EMBED_LIBS}\"" >&6;}
> + 
> +diff --git a/racket/src/zuo/configure.ac b/racket/src/zuo/configure.ac
> +index 598ff79629..051ea0beb5 100644
> +--- a/racket/src/zuo/configure.ac
> ++++ b/racket/src/zuo/configure.ac
> +@@ -27,12 +27,14 @@ AC_PROG_CC
> + 
> + if test "${CC_FOR_BUILD}" = ""; then
> +   CC_FOR_BUILD='$(CC) -O2'
> +-  CFLAGS_FOR_BUILD='$(CPPFLAGS) $(CFLAGS)'
> ++  CPPFLAGS_FOR_BUILD='$(CPPFLAGS)'
> ++  CFLAGS_FOR_BUILD='$(CFLAGS)'
> +   LDFLAGS_FOR_BUILD='$(LDFLAGS)'
> +   LIBS_FOR_BUILD='$(LIBS)'
> + fi
> + AC_SUBST(CC_FOR_BUILD)
> + AC_SUBST(CFLAGS_FOR_BUILD)
> ++AC_SUBST(CPPFLAGS_FOR_BUILD)
> + AC_SUBST(LDFLAGS_FOR_BUILD)
> + AC_SUBST(LIBS_FOR_BUILD)
> + 
> +-- 
> +2.32.0
> +
> diff --git a/gnu/packages/patches/racket-zuo-bin-sh.patch b/gnu/packages/patches/racket-zuo-bin-sh.patch
> new file mode 100644
> index 0000000000..bcdcb8e963
> --- /dev/null
> +++ b/gnu/packages/patches/racket-zuo-bin-sh.patch
> @@ -0,0 +1,74 @@
> +From 73d9b77a11b4516905caf579abb559736f715ea6 Mon Sep 17 00:00:00 2001
> +From: Philip McGrath <philip@philipmcgrath.com>
> +Date: Mon, 11 Apr 2022 20:43:18 -0400
> +Subject: [PATCH] Zuo: patch zuo_process for "/bin/sh" on Guix
> +
> +If:
> +
> +    1. The nonstandard but ubiquitous macro `_PATH_BSHELL` from
> +       <paths.h> is defined; and
> +
> +    2. `zuo_process` is called with the exact path "/bin/sh"; and
> +
> +    3. The path specified by `_PATH_BSHELL` exists;
> +
> +then `zuo_process` will execute the file specified by `_PATH_BSHELL`
> +instead of "/bin/sh".
> +
> +Checking that the path specified by `_PATH_BSHELL` exists safeguards
> +against obscure errors if attempting to use stand-alone executables
> +built by the patched Racket in non-Guix envoronments.
> +---
> + racket/src/zuo/zuo.c | 20 ++++++++++++++++++--
> + 1 file changed, 18 insertions(+), 2 deletions(-)
> +
> +diff --git a/racket/src/zuo/zuo.c b/racket/src/zuo/zuo.c
> +index 17f161826d..c4fb3929bb 100644
> +--- a/racket/src/zuo/zuo.c
> ++++ b/racket/src/zuo/zuo.c
> +@@ -15,6 +15,7 @@
> + #include <string.h>
> + #include <ctype.h>
> + #ifdef ZUO_UNIX
> ++# include <paths.h> /* PATCHED for Guix */
> + # include <fcntl.h>
> + # include <unistd.h>
> + # include <errno.h>
> +@@ -5730,7 +5731,10 @@ static void zuo_pipe(zuo_raw_handle_t *_r, zuo_raw_handle_t *_w)
> + zuo_t *zuo_process(zuo_t *command_and_args)
> + {
> +   const char *who = "process";
> +-  zuo_t *command = _zuo_car(command_and_args);
> ++  /* BEGIN PATCH for Guix */
> ++  zuo_t *_guix_orig_command = _zuo_car(command_and_args);
> ++  zuo_t *command;
> ++  /* END PATCH for Guix */
> +   zuo_t *args = _zuo_cdr(command_and_args), *rev_args = z.o_null;
> +   zuo_t *options = z.o_empty_hash, *opt;
> +   zuo_t *dir, *l, *p_handle, *result;
> +@@ -5741,7 +5745,19 @@ zuo_t *zuo_process(zuo_t *command_and_args)
> +   void *env;
> +   int as_child, exact_cmdline;
> + 
> +-  check_path_string(who, command);
> ++  /* BEGIN PATCH for Guix */
> ++  check_path_string(who, _guix_orig_command);
> ++#if defined(_PATH_BSHELL)
> ++  command =
> ++    ((z.o_false == zuo_string_eql(_guix_orig_command, zuo_string("/bin/sh")))
> ++     || (z.o_false == zuo_stat(zuo_string(_PATH_BSHELL), z.o_false, z.o_true)))
> ++    ? _guix_orig_command
> ++    : zuo_string(_PATH_BSHELL);
> ++#else
> ++  command = _guix_orig_command;
> ++#endif
> ++  /* END PATCH for Guix */
> ++
> +   for (l = args; l->tag == zuo_pair_tag; l = _zuo_cdr(l)) {
> +     zuo_t *a = _zuo_car(l);
> +     if (a == z.o_null) {
> +
> +base-commit: 87eee6e2adb8c6bc11e60619c706fa6295096085
> +-- 
> +2.32.0
> +
> diff --git a/gnu/packages/racket.scm b/gnu/packages/racket.scm
> index 0f766e7850..6433897981 100644
> --- a/gnu/packages/racket.scm
> +++ b/gnu/packages/racket.scm
> @@ -200,6 +200,7 @@ (define* (racket-vm-for-system #:optional
>        racket-vm-bc))
>  
>  (define %racket-version "8.5") ; Remember to update chez-scheme-for-racket!
> +(define %zuo-version "1.0") ; defined in racket/src/zuo/zuo.c
>  (define %racket-commit
>    (string-append "v" %racket-version))
>  (define %racket-origin
> @@ -232,6 +233,56 @@ (define %racket-origin
>           ;; Unbundle libffi.
>           (delete-file-recursively "racket/src/bc/foreign/libffi")))))
>  
> +
> +(define-public zuo
> +  (let ((revision #f))
> +    (package
> +      (name "zuo")
> +      (version (string-append %zuo-version
> +                              "-racket"
> +                              "8.6"

Should the 8.6 instead be %racket-version? I understand above it is
currently 8.5 but why is it hardcoded? I'm a little late to the party.

> +                              (if revision "-guix" "")
> +                              (or revision "")))

I'd rather this be (if revision
                     (string-append "-guix" revision)
                     "")

> +      (source
> +       (origin
> +         (inherit %racket-origin)
> +         (uri (git-reference
> +               (url "https://github.com/racket/racket")
> +               (commit "v8.6")))
> +         (sha256
> +          (base32 "1yi36nr7zrdwrnvpmliirxxjz4pyfyhkar6yvk3rapvmg4q2vmnk"))
> +         (patches (append (origin-patches %racket-origin)
> +                          (search-patches "racket-backport-8.6-zuo.patch"
> +                                          "racket-zuo-bin-sh.patch")))
> +         (file-name (git-file-name "racket" "8.6"))))

I see a third instance of "8.6", lets factor this out either use
%racket-version (I see we've decided on updating separately from racket,
so that's out) or zuo-racket-version would also work, as a variable up
with revision.

> +      (outputs '("out" "debug"))
> +      (build-system gnu-build-system)
> +      (arguments
> +       (list
> +        #:out-of-source? #t
> +        #:phases
> +        #~(modify-phases %standard-phases
> +            (add-after 'unpack 'chdir
> +              (lambda args
> +                (chdir "racket/src/zuo"))))))
> +      (home-page "https://github.com/racket/zuo")
> +      ;; ^ This is downstream of https://github.com/racket/racket,
> +      ;; but it's designed to be a friendly landing place
> +      (synopsis "Tiny Racket for build scripts")
> +      (description "You should use Racket to write scripts.  But what if you
> +need something much smaller than Racket for some reason—or what if you're
> +trying to script a build of Racket itself?  Zuo (作) is a tiny Racket with
> +primitives for dealing with files and running processes, and it comes with a
> +@command{make}-like embedded DSL.
> +
> +Zuo is a Racket variant in the sense that program files start with
> +@code{#lang}, and the module path after @code{#lang} determines the parsing
> +and expansion of the file content.  That's how the @command{make}-like DSL is
> +defined, and even the base Zuo language is defined by layers of @code{#lang}s.
> +One of the early layers implements macros.")
> +      (license (list license:asl2.0 license:expat)))))

I'm not sold on the second paragraph, but I understand it's from
upstream so that's not too bad. For the first paragraph I'd drop the
first two sentences and consider @acronym{symbol, Zuo} for the next
sentence.

> +
> +
>  (define racket-vm-common-configure-flags
>    #~`(,@(cond
>           ((false-if-exception
> -- 
> 2.32.0
> 

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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