gcc: 2 symlink 2 hack

[K900]

Tested nix build .#pkgsCross.mingw32.libarchive .#pkgsCross.aarch64-multiplatform.libarchive .#gccgo .#libgccjit .#loadlibrary.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

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[vcunat]

(I'm afraid I don't have capacity.)

[Mindavi]

This seems to make sense to me and is well explained in the comments.

[trofi]

Bisect says 5e2e98f gcc: document, clean up, undangle install symlink hacks broke claws-mail build in master as https://hydra.nixos.org/build/292052276:

/nix/store/kmfzghfpqmfl98mgx802994q58vys2bf-gnused-4.9/bin/sed: can't read /nix/store/yxci1m17spdrd2a428rgwzzk2np18j9m-gcc-14-20241116-lib/lib/../lib64/libstdc++.la: No such file or directory
libtool:   error: '/nix/store/yxci1m17spdrd2a428rgwzzk2np18j9m-gcc-14-20241116-lib/lib/../lib64/libstdc++.la' is not a valid libtool archive

It fails both on aarch64-linux and x86_64-linux.

[vcunat]

On current nixpkgs master we would work around this by

--- a/pkgs/by-name/cl/claws-mail/package.nix
+++ b/pkgs/by-name/cl/claws-mail/package.nix
@@ -331,6 +331,12 @@ stdenv.mkDerivation rec {
       feature: map (flag: lib.strings.enableFeature feature.enabled flag) feature.flags
     ) features);
 
+  # FIXME: ugly hack for https://github.com/NixOS/nixpkgs/pull/389009
+  postConfigure = ''
+    substituteInPlace libtool \
+      --replace 'for search_ext in .la $std_shrext .so .a' 'for search_ext in $std_shrext .so .a'
+  '';
+
   enableParallelBuilding = true;
 
   preFixup = ''

I didn't push this one, as the package won't build anyway, for a different reason.

[vcunat]

And on current staging we have a general fix.

[trofi]

On current nixpkgs master we would work around this by

--- a/pkgs/by-name/cl/claws-mail/package.nix
+++ b/pkgs/by-name/cl/claws-mail/package.nix
@@ -331,6 +331,12 @@ stdenv.mkDerivation rec {
       feature: map (flag: lib.strings.enableFeature feature.enabled flag) feature.flags
     ) features);
 
+  # FIXME: ugly hack for https://github.com/NixOS/nixpkgs/pull/389009
+  postConfigure = ''
+    substituteInPlace libtool \
+      --replace 'for search_ext in .la $std_shrext .so .a' 'for search_ext in $std_shrext .so .a'
+  '';
+
   enableParallelBuilding = true;
 
   preFixup = ''

I didn't push this one, as the package won't build anyway, for a different reason.

Along with enablePluginClamd = false; I was able to get my system to build against master. Thank you!