libamplsolver: fix build on non-trapping FP architectures (#478259)

Author: aanderse

pkgs/by-name/li/libamplsolver/package.nix

@@ -25,9 +25,15 @@ stdenv.mkDerivation {
     })
   ];
 
-  # Allow install_name_tool rewrite paths on darwin.
-  #   error: install_name_tool: changing install names or rpaths can't be redone for: /nix/store/...-libamplsolver-.../lib/libamplsolver.dylib (for architecture arm64) because larger updated load commands do not fit (the program must be relinked, and you may need to use -headerpad or -headerpad_max_install_names)
-  NIX_LDFLAGS = lib.optional stdenv.hostPlatform.isDarwin "-headerpad_max_install_names";
+  env = {
+    # For non-trapping FP architectures like loongarch64 and riscv64
+    NIX_CFLAGS_COMPILE = lib.optionalString (
+      stdenv.hostPlatform.isRiscV64 || stdenv.hostPlatform.isLoongArch64
+    ) "-DNO_fpu_control";
+    # Allow install_name_tool rewrite paths on darwin.
+    #   error: install_name_tool: changing install names or rpaths can't be redone for: /nix/store/...-libamplsolver-.../lib/libamplsolver.dylib (for architecture arm64) because larger updated load commands do not fit (the program must be relinked, and you may need to use -headerpad or -headerpad_max_install_names)
+    NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-headerpad_max_install_names";
+  };
 
   installPhase = ''
     runHook preInstall