superscs: fix build with gcc 15

[Sigmanificient]

• Some packages may fail to compile with GCC 15 #475479

While migrating my python packages to finalAttrs, I encountered this build failures, as i am indirectly dependent.

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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Add a 👍 reaction to pull requests you find important.

[nim65s]

Thanks !

I'll forward that to upstream, even if they do not seem super reactive

[Aleksanaa]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 477003 -p superscs
Commit: 7c7d6ac789e8ace559bc381368604f4871e33ba5 (subsequent changes)
Merge: 8a9799493332c599f4edd6e9a742d8a907d78381

Logs: https://github.com/Aleksanaa/nixpkgs-review-gha/actions/runs/20704720359

---

x86_64-linux

✅ 1 package built:

• superscs

---

aarch64-linux

✅ 1 package built:

• superscs

---

x86_64-darwin (sandbox = relaxed)

❌ 1 package failed to build:

• superscs

---

Error logs: `x86_64-darwin`

superscs

src/unit_test_util.c:43:29: error: function cannot return function type 'bool' (aka 'int (int *)')
   43 | bool scs_assert_equals_float(const scs_float a, const scs_float b, const scs_float tol) {
      |                             ^
src/unit_test_util.c:47:29: error: function cannot return function type 'bool' (aka 'int (int *)')
   47 | bool scs_assert_equals_array(
      |                             ^
src/unit_test_util.c:55:33: error: function cannot return function type 'bool' (aka 'int (int *)')
   55 | bool scs_assert_equals_array_int(
      |                                 ^
src/unit_test_util.c:60:10: error: illegal initializer (only variables can be initialized)
   60 |     bool all_equal = 1;
      |          ^
src/unit_test_util.c:67:21: error: unknown type name 'unitTest_t'
   67 | bool scs_test(const unitTest_t ut, const char* name) {
      |                     ^
src/unit_test_util.c:67:14: error: function cannot return function type 'bool' (aka 'int (int *)')
   67 | bool scs_test(const unitTest_t ut, const char* name) {
      |              ^
16 errors generated.
make: *** [Makefile:59: out/obj/unit_test_util.o] Error 1

---

aarch64-darwin (sandbox = relaxed)

❌ 1 package failed to build:

• superscs

---

Error logs: `aarch64-darwin`

superscs

src/unit_test_util.c:43:29: error: function cannot return function type 'bool' (aka 'int (int *)')
   43 | bool scs_assert_equals_float(const scs_float a, const scs_float b, const scs_float tol) {
      |                             ^
src/unit_test_util.c:47:29: error: function cannot return function type 'bool' (aka 'int (int *)')
   47 | bool scs_assert_equals_array(
      |                             ^
src/unit_test_util.c:55:33: error: function cannot return function type 'bool' (aka 'int (int *)')
   55 | bool scs_assert_equals_array_int(
      |                                 ^
src/unit_test_util.c:60:10: error: illegal initializer (only variables can be initialized)
   60 |     bool all_equal = 1;
      |          ^
src/unit_test_util.c:67:21: error: unknown type name 'unitTest_t'
   67 | bool scs_test(const unitTest_t ut, const char* name) {
      |                     ^
src/unit_test_util.c:67:14: error: function cannot return function type 'bool' (aka 'int (int *)')
   67 | bool scs_test(const unitTest_t ut, const char* name) {
      |              ^
16 errors generated.
make: *** [Makefile:59: out/obj/unit_test_util.o] Error 1

[Aleksanaa]

nixpkgs-review result

Generated using nixpkgs-review-gha

Command: nixpkgs-review pr 477003 -p superscs
Commit: 8edaedac0de6a219980a0e598921b40a5012a436 (subsequent changes)
Merge: fc5f7413cf40d3618bc3d27c318d6ebfa7601a11

Logs: https://github.com/Aleksanaa/nixpkgs-review-gha/actions/runs/20718922258

---

x86_64-linux

✅ 1 package built:

• superscs

---

aarch64-linux

✅ 1 package built:

• superscs

---

x86_64-darwin (sandbox = relaxed)

✅ 1 package built:

• superscs

---

aarch64-darwin (sandbox = relaxed)

✅ 1 package built:

• superscs