perlPackages.YAMLSyck: fix build with gcc15

[ghpzin]

• add "-std=gnu17" to env.NIX_CFLAGS_COMPILE

Upstream issue:
https://www.github.com/cpan-authors/YAML-Syck/issues/61

There is a PR with proposed patch:
https://www.github.com/cpan-authors/YAML-Syck/pull/64
alpine uses it:
https://gitlab.alpinelinux.org/alpine/aports/-/commit/7dab2a77194967a52df82378c817f686d32056a7

Other distros settled on "-std=gnu17":
https://gitlab.archlinux.org/archlinux/packaging/packages/perl-yaml-syck/-/commit/9355df2bddfdda80963a629d750d0dbc1c1d8aa8
https://src.fedoraproject.org/rpms/perl-YAML-Syck/c/5fb93f7185d99ad738c985a944191ceb89368a82

Fixes build failure with gcc15:

emitter.c:161:9: error: too many arguments to function 'st_foreach';
expected 0, have 3
  161 |         st_foreach( e->anchors, syck_st_free_anchors, 0 );
      |         ^~~~~~~~~~  ~~~~~~~~~~
In file included from syck.h:36,
                 from emitter.c:15:
syck_st.h:35:6: note: declared here
   35 | void st_foreach(), st_add_direct(), st_free_table(), st_cleanup_safe();
      |      ^~~~~~~~~~
emitter.c:162:9: error: too many arguments to function 'st_free_table';
expected 0, have 1
  162 |         st_free_table( e->anchors );
      |         ^~~~~~~~~~~~~  ~~~~~~~~~~
syck_st.h:35:37: note: declared here
   35 | void st_foreach(), st_add_direct(), st_free_table(), st_cleanup_safe();
      |                                     ^~~~~~~~~~~~~
emitter.c:400:9: error: too many arguments to function 'st_lookup';
expected 0, have 3
  400 |         st_lookup( e->markers, n, (st_data_t *)&oid ) &&
      |         ^~~~~~~~~  ~~~~~~~~~~
syck_st.h:34:18: note: declared here
   34 | int st_insert(), st_lookup();
      |                  ^~~~~~~~~

---

Tested build with:

nix-build --expr 'with import ./. {}; (perlPackages.overrideScope (final: prev: { stdenv = gcc15Stdenv; })).YAMLSyck'

Part of fixes for gcc15 update:
#440456

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

---

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[ghpzin]

nixpkgs-review result

Generated using nixpkgs-review.

Command: nixpkgs-review pr 468898
Commit: 192988ed10b5d300cf77e8bfa6cb07b9db9a135c

---

x86_64-linux

✅ 25 packages built:

• perl538Packages.BeanstalkClient
• perl538Packages.BeanstalkClient.devdoc
• perl538Packages.CPAN
• perl538Packages.CPAN.devdoc
• perl538Packages.GraphicsColor
• perl538Packages.GraphicsColor.devdoc
• perl538Packages.MooseXStorage
• perl538Packages.MooseXStorage.devdoc
• perl538Packages.MooseXStorageFormatJSONpm
• perl538Packages.MooseXStorageFormatJSONpm.devdoc
• perl538Packages.YAMLSyck
• perl538Packages.YAMLSyck.devdoc
• perlPackages.BeanstalkClient (perl540Packages.BeanstalkClient)
• perlPackages.BeanstalkClient.devdoc (perl540Packages.BeanstalkClient.devdoc)
• perlPackages.CPAN (perl540Packages.CPAN)
• perlPackages.CPAN.devdoc (perl540Packages.CPAN.devdoc)
• perlPackages.GraphicsColor (perl540Packages.GraphicsColor)
• perlPackages.GraphicsColor.devdoc (perl540Packages.GraphicsColor.devdoc)
• perlPackages.MooseXStorage (perl540Packages.MooseXStorage)
• perlPackages.MooseXStorage.devdoc (perl540Packages.MooseXStorage.devdoc)
• perlPackages.MooseXStorageFormatJSONpm (perl540Packages.MooseXStorageFormatJSONpm)
• perlPackages.MooseXStorageFormatJSONpm.devdoc (perl540Packages.MooseXStorageFormatJSONpm.devdoc)
• perlPackages.YAMLSyck (perl540Packages.YAMLSyck)
• perlPackages.YAMLSyck.devdoc (perl540Packages.YAMLSyck.devdoc)
• shelldap

All good now, thank you!