fix cmake

examples/book/CMakeLists.txt

@@ -0,0 +1,44 @@
+cmake_minimum_required(VERSION 3.10)
+project(MyCapnpProject)
+
+# Find the Cap'n Proto compiler and C plugin
+find_program(CAPNP_EXECUTABLE capnp)
+
+if(NOT CAPNP_EXECUTABLE)
+    message(FATAL_ERROR "capnp compiler not found!")
+endif()
+
+# Schema file (adjust path as needed)
+set(SCHEMA_FILE "book.capnp")
+
+# Generated file paths (outputs in the build directory)
+set(GENERATED_C "${CMAKE_CURRENT_BINARY_DIR}/${SCHEMA_FILE}.c")
+set(GENERATED_H "${CMAKE_CURRENT_BINARY_DIR}/${SCHEMA_FILE}.h")
+
+# Generate C++ sources from the schema
+add_custom_command(
+    OUTPUT ${GENERATED_C} ${GENERATED_H}
+    COMMAND ${CAPNP_EXECUTABLE} compile
+        -o $<TARGET_FILE:capnpc-c>:${CMAKE_CURRENT_BINARY_DIR}
+	-I ${CMAKE_CURRENT_SOURCE_DIR}/../../compiler
+	--src-prefix ${CMAKE_CURRENT_SOURCE_DIR}
+        ${CMAKE_CURRENT_SOURCE_DIR}/${SCHEMA_FILE}
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${SCHEMA_FILE}
+    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+    COMMENT "Generating C code for ${SCHEMA_FILE}"
+)
+
+# Create an executable/library and include generated files
+add_executable(book test.c ${GENERATED_C})
+
+# Include directory for generated headers
+target_include_directories(book PRIVATE
+    ${CMAKE_CURRENT_BINARY_DIR}
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+# Link against Cap'n Proto libraries
+target_link_libraries(book PRIVATE
+    capnp
+    CapnC_Runtime
+)