pkgsStatic.protobuf: fix installation of protoc

pkgs/development/libraries/protobuf/generic-v3-cmake.nix

@@ -53,6 +53,8 @@ let
         url = "https://github.com/protocolbuffers/protobuf/commit/a7324f88e92bc16b57f3683403b6c993bf68070b.patch";
         sha256 = "sha256-SmwaUjOjjZulg/wgNmR/F5b8rhYA2wkKAjHIOxjcQdQ=";
       })
+    ] ++ lib.optionals stdenv.hostPlatform.isStatic [
+      ./static-executables-have-no-rpath.patch
     ];
 
     nativeBuildInputs = let

pkgs/development/libraries/protobuf/static-executables-have-no-rpath.patch

@@ -0,0 +1,18 @@
+diff --git a/cmake/install.cmake b/cmake/install.cmake
+index 26a55be8b..b6823c3f9 100644
+--- a/cmake/install.cmake
++++ b/cmake/install.cmake
+@@ -32,13 +32,6 @@ if (protobuf_BUILD_PROTOC_BINARIES)
+   install(TARGETS protoc EXPORT protobuf-targets
+     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT protoc
+     BUNDLE DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT protoc)
+-  if (UNIX AND NOT APPLE)
+-    set_property(TARGET protoc
+-      PROPERTY INSTALL_RPATH "$ORIGIN/../${CMAKE_INSTALL_LIBDIR}")
+-  elseif (APPLE)
+-    set_property(TARGET protoc
+-      PROPERTY INSTALL_RPATH "@loader_path/../lib")
+-  endif()
+ endif (protobuf_BUILD_PROTOC_BINARIES)
+ 
+ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/protobuf.pc ${CMAKE_CURRENT_BINARY_DIR}/protobuf-lite.pc DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")