Build as much of the samples as possible in lite-mode

c++/samples/CMakeLists.txt

@@ -26,10 +26,13 @@ add_executable(addressbook addressbook.c++ ${addressbookSources})
 target_link_libraries(addressbook CapnProto::capnp)
 target_include_directories(addressbook PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 
-capnp_generate_cpp(calculatorSources calculatorHeaders calculator.capnp)
-add_executable(calculator-client calculator-client.c++ ${calculatorSources})
-add_executable(calculator-server calculator-server.c++ ${calculatorSources})
-target_link_libraries(calculator-client CapnProto::capnp-rpc)
-target_link_libraries(calculator-server CapnProto::capnp-rpc)
-target_include_directories(calculator-client PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
-target_include_directories(calculator-server PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+# Don't build the rpc sample if find_package() found an installation of Cap'n Proto lite.
+if(TARGET CapnProto::capnp-rpc)
+  capnp_generate_cpp(calculatorSources calculatorHeaders calculator.capnp)
+  add_executable(calculator-client calculator-client.c++ ${calculatorSources})
+  add_executable(calculator-server calculator-server.c++ ${calculatorSources})
+  target_link_libraries(calculator-client CapnProto::capnp-rpc)
+  target_link_libraries(calculator-server CapnProto::capnp-rpc)
+  target_include_directories(calculator-client PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+  target_include_directories(calculator-server PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+endif()

c++/samples/addressbook.c++

@@ -113,6 +113,8 @@ void printAddressBook(int fd) {
   }
 }
 
+#if !CAPNP_LITE
+
 #include "addressbook.capnp.h"
 #include <capnp/message.h>
 #include <capnp/serialize-packed.h>
@@ -260,8 +262,9 @@ void dynamicPrintMessage(int fd, StructSchema schema) {
   std::cout << std::endl;
 }
 
+#endif  // !CAPNP_LITE
+
 int main(int argc, char* argv[]) {
-  StructSchema schema = Schema::from<AddressBook>();
   if (argc != 2) {
     std::cerr << "Missing arg." << std::endl;
     return 1;
@@ -269,10 +272,14 @@ int main(int argc, char* argv[]) {
     writeAddressBook(1);
   } else if (strcmp(argv[1], "read") == 0) {
     printAddressBook(0);
+#if !CAPNP_LITE
   } else if (strcmp(argv[1], "dwrite") == 0) {
+    StructSchema schema = Schema::from<AddressBook>();
     dynamicWriteAddressBook(1, schema);
   } else if (strcmp(argv[1], "dread") == 0) {
+    StructSchema schema = Schema::from<AddressBook>();
     dynamicPrintMessage(0, schema);
+#endif
   } else {
     std::cerr << "Invalid arg: " << argv[1] << std::endl;
     return 1;