build gtest statically

Author: dlipicar

nix/all.nix

@@ -56,6 +56,18 @@ pkgs.stdenv.mkDerivation {
     mkdir -p $out/bin
     cp build/tests/lgx_tests $out/bin/
     cp build/tests/lgx_lib_tests $out/bin/
+
+    # Fix rpath for lgx_lib_tests to find liblgx.so at $out/lib                                                                                                                                                            
+    # Keep Nix store entries (libstdc++, etc.) but replace /build/ paths                                                                                                                                        
+    if [ -f $out/bin/lgx_lib_tests ]; then                                                                                                                                                                                 
+      if [[ "$(uname)" == "Darwin" ]]; then                                                                                                                                                                                
+        install_name_tool -add_rpath $out/lib $out/bin/lgx_lib_tests                                                                                                                                                       
+      else                                                                                                                                                                                                                 
+        old_rpath=$(patchelf --print-rpath $out/bin/lgx_lib_tests)                                                                                                                                                         
+        new_rpath=$(echo "$old_rpath" | tr ':' '\n' | grep -v '/build/' | tr '\n' ':' | sed 's/:$//')                                                                                                                      
+        patchelf --set-rpath "$out/lib:$new_rpath" $out/bin/lgx_lib_tests                                                                                                                                                  
+      fi                                                                                                                                                                                                                   
+    fi      
     
     # Fix rpath for lgx_lib_tests to find the shared library
     if [ -f $out/bin/lgx_lib_tests ]; then

nix/default.nix

@@ -17,7 +17,10 @@
     pkgs.zlib
     pkgs.icu
     pkgs.nlohmann_json
-    pkgs.gtest
+    # GTest built static so test binaries don't depend on libgtest at runtime
+    (pkgs.gtest.overrideAttrs (old: {
+      cmakeFlags = (old.cmakeFlags or [ ]) ++ [ "-DBUILD_SHARED_LIBS=OFF" ];
+    }))
   ];
 
   # Common CMake flags