termcap: fix build

[Prince213]

Fixes #479253.

In align with the steps in #475479.
Supersedes and closes #478354.

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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[Prince213]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 479265
Commit: c2f15e46c65866536bdaa2d92c3997780b6b2681 (subsequent changes)
Merge: 449e73f0f1bf4b2f9dd7ee5fd31569036e3765e0

Logs: https://github.com/Prince213/nixpkgs-review-gha/actions/runs/20911053466

---

x86_64-linux

✅ 4 packages built:

• gnucap
• gnucap-full
• termcap
• termcap.dev

---

aarch64-linux

✅ 4 packages built:

• gnucap
• gnucap-full
• termcap
• termcap.dev

---

x86_64-darwin (sandbox = relaxed)

❌ 2 packages failed to build:

• termcap
• termcap.dev

---

Error logs: `x86_64-darwin`

termcap

      | ^
termcap.c:449:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  449 | tgetent (bp, name)
      | ^
termcap.c:614:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  614 | scan_file (str, fd, bufp)
      | ^
termcap.c:654:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  654 | name_match (line, name)
      | ^
termcap.c:670:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  670 | compare_contin (str1, str2)
      | ^
termcap.c:711:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  711 | gobble_line (fd, bufp, append_end)
      | ^
13 warnings and 1 error generated.
make: *** [Makefile:72: termcap.o] Error 1
make: *** Waiting for unfinished jobs....
5 warnings generated.

---

aarch64-darwin (sandbox = relaxed)

❌ 2 packages failed to build:

• termcap
• termcap.dev

---

Error logs: `aarch64-darwin`

termcap

      | ^
termcap.c:449:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  449 | tgetent (bp, name)
      | ^
termcap.c:614:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  614 | scan_file (str, fd, bufp)
      | ^
termcap.c:654:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  654 | name_match (line, name)
      | ^
termcap.c:670:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  670 | compare_contin (str1, str2)
      | ^
termcap.c:711:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  711 | gobble_line (fd, bufp, append_end)
      | ^
13 warnings and 1 error generated.
make: *** [Makefile:72: termcap.o] Error 1
make: *** Waiting for unfinished jobs....
5 warnings generated.