PingLiuPing commented on code in PR #936:
URL: https://github.com/apache/iceberg-cpp/pull/936#discussion_r4119045023
##########
example/CMakeLists.txt:
##########
@@ -20,13 +20,79 @@ cmake_minimum_required(VERSION 3.25)
project(example)
-set(CMAKE_CXX_STANDARD 23)
+# C++20 is the minimum standard iceberg-cpp's public headers support, so the
+# example builds as C++20 by default to keep that contract exercised. Set this
to
+# 23 to also check the headers from a C++23 consumer.
+set(ICEBERG_EXAMPLE_CXX_STANDARD
+ 20
+ CACHE STRING "C++ standard used to build the example (20 or 23)")
+set_property(CACHE ICEBERG_EXAMPLE_CXX_STANDARD PROPERTY STRINGS 20 23)
+if(NOT ICEBERG_EXAMPLE_CXX_STANDARD MATCHES "^(20|23)$")
+ message(FATAL_ERROR "ICEBERG_EXAMPLE_CXX_STANDARD must be 20 or 23, got "
+ "'${ICEBERG_EXAMPLE_CXX_STANDARD}'")
+endif()
+
+set(CMAKE_CXX_STANDARD ${ICEBERG_EXAMPLE_CXX_STANDARD})
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
find_package(iceberg CONFIG REQUIRED COMPONENTS bundle rest)
+if(TARGET iceberg::iceberg_bundle_shared)
+ set(ICEBERG_BUNDLE_TARGET iceberg::iceberg_bundle_shared)
+else()
+ set(ICEBERG_BUNDLE_TARGET iceberg::iceberg_bundle_static)
+endif()
+
+if(TARGET iceberg::iceberg_rest_shared)
+ set(ICEBERG_REST_TARGET iceberg::iceberg_rest_shared)
+else()
+ set(ICEBERG_REST_TARGET iceberg::iceberg_rest_static)
+endif()
+
add_executable(demo_example demo_example.cc)
-target_link_libraries(demo_example
- PRIVATE
"$<IF:$<TARGET_EXISTS:iceberg::iceberg_bundle_shared>,iceberg::iceberg_bundle_shared,iceberg::iceberg_bundle_static>"
-
"$<IF:$<TARGET_EXISTS:iceberg::iceberg_rest_shared>,iceberg::iceberg_rest_shared,iceberg::iceberg_rest_static>"
-)
+target_link_libraries(demo_example PRIVATE ${ICEBERG_BUNDLE_TARGET}
+ ${ICEBERG_REST_TARGET})
+
+# Compile every installed public header as a consumer using
+# ICEBERG_EXAMPLE_CXX_STANDARD. The installed include
+# tree is the public API contract: iceberg_install_all_headers excludes
internal
+# headers before packaging them.
+get_target_property(ICEBERG_BUNDLE_INCLUDE_DIRS ${ICEBERG_BUNDLE_TARGET}
+ INTERFACE_INCLUDE_DIRECTORIES)
+foreach(ICEBERG_INCLUDE_DIR IN LISTS ICEBERG_BUNDLE_INCLUDE_DIRS)
+ if(EXISTS "${ICEBERG_INCLUDE_DIR}/iceberg")
+ set(ICEBERG_PUBLIC_INCLUDE_DIR "${ICEBERG_INCLUDE_DIR}")
+ break()
+ endif()
+endforeach()
+
+if(NOT ICEBERG_PUBLIC_INCLUDE_DIR)
+ message(FATAL_ERROR "Could not locate iceberg's installed public headers")
+endif()
+
+file(GLOB_RECURSE
+ ICEBERG_PUBLIC_HEADERS
+ CONFIGURE_DEPENDS
+ "${ICEBERG_PUBLIC_INCLUDE_DIR}/iceberg/*.h"
+ "${ICEBERG_PUBLIC_INCLUDE_DIR}/iceberg/*.hpp")
Review Comment:
Thanks, checked the source code and no .hpp headers, removed.
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