kou commented on a change in pull request #7696:
URL: https://github.com/apache/arrow/pull/7696#discussion_r452624987
##########
File path: cpp/examples/minimal_build/CMakeLists.txt
##########
@@ -19,10 +19,31 @@ cmake_minimum_required(VERSION 3.0)
project(ArrowMinimalExample)
+option(ARROW_LINK_SHARED "Link to the Arrow shared library" ON)
+
find_package(Arrow REQUIRED)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_BUILD_TYPE Release)
+
message(STATUS "Arrow version: ${ARROW_VERSION}")
message(STATUS "Arrow SO version: ${ARROW_FULL_SO_VERSION}")
add_executable(arrow_example example.cc)
-target_link_libraries(arrow_example PRIVATE arrow_shared)
+
+if (ARROW_LINK_SHARED)
+ target_link_libraries(arrow_example PRIVATE arrow_shared)
+else()
+ set(THREADS_PREFER_PTHREAD_FLAG ON)
+ find_package(Threads REQUIRED)
+
+ # We must also link to libarrow_bundled_dependencies.a
+ get_property(arrow_static_loc TARGET arrow_static PROPERTY LOCATION)
+ get_filename_component(arrow_lib_dir ${arrow_static_loc} DIRECTORY)
+
+ add_library(arrow_dependencies STATIC IMPORTED)
+ set_target_properties(arrow_dependencies
+ PROPERTIES IMPORTED_LOCATION
+
"${arrow_lib_dir}/${CMAKE_STATIC_LIBRARY_PREFIX}arrow_bundled_dependencies${CMAKE_STATIC_LIBRARY_SUFFIX}")
Review comment:
Could you put this to `cpp/src/arrow/ArrowConfig.cmake.in`?
Then users don't need to put this to their `CMakeLists.txt`.
```diff
diff --git a/cpp/src/arrow/ArrowConfig.cmake.in
b/cpp/src/arrow/ArrowConfig.cmake.in
index 0e595066d..ccbc3d110 100644
--- a/cpp/src/arrow/ArrowConfig.cmake.in
+++ b/cpp/src/arrow/ArrowConfig.cmake.in
@@ -40,4 +40,14 @@ include("${CMAKE_CURRENT_LIST_DIR}/ArrowOptions.cmake")
# already existent target error.
if(NOT (TARGET arrow_shared OR TARGET arrow_static))
include("${CMAKE_CURRENT_LIST_DIR}/ArrowTargets.cmake")
+
+ if(TARGET arrow_static)
+ get_property(arrow_static_loc TARGET arrow_static PROPERTY LOCATION)
+ get_filename_component(arrow_lib_dir ${arrow_static_loc} DIRECTORY)
+
+ add_library(arrow_bundled_dependencies STATIC IMPORTED)
+ set_target_properties(arrow_bundled_dependencies
+ PROPERTIES IMPORTED_LOCATION
+
"${arrow_lib_dir}/${CMAKE_STATIC_LIBRARY_PREFIX}arrow_bundled_dependencies${CMAKE_STATIC_LIBRARY_SUFFIX}")
+ endif()
endif()
```
If we append `arrow_dependencies` (`arrow_bundled_dependencies` will be
better) to `arrow_static`'s `INTERFACE_LINK_LIBRARIES`, users may not need to
care about bundled dependencies. (I didn't test it. Sorry.):
```diff
diff --git a/cpp/src/arrow/ArrowConfig.cmake.in
b/cpp/src/arrow/ArrowConfig.cmake.in
index 0e595066d..a2dac690f 100644
--- a/cpp/src/arrow/ArrowConfig.cmake.in
+++ b/cpp/src/arrow/ArrowConfig.cmake.in
@@ -40,4 +40,18 @@ include("${CMAKE_CURRENT_LIST_DIR}/ArrowOptions.cmake")
# already existent target error.
if(NOT (TARGET arrow_shared OR TARGET arrow_static))
include("${CMAKE_CURRENT_LIST_DIR}/ArrowTargets.cmake")
+
+ if(TARGET arrow_static)
+ get_property(arrow_static_loc TARGET arrow_static PROPERTY LOCATION)
+ get_filename_component(arrow_lib_dir ${arrow_static_loc} DIRECTORY)
+
+ add_library(arrow_bundled_dependencies STATIC IMPORTED)
+ set_target_properties(arrow_bundled_dependencies
+ PROPERTIES IMPORTED_LOCATION
+
"${arrow_lib_dir}/${CMAKE_STATIC_LIBRARY_PREFIX}arrow_bundled_dependencies${CMAKE_STATIC_LIBRARY_SUFFIX}")
+
+ get_property(arrow_static_interface_link_libraries TARGET arrow_static
PROPERTY INTERFACE_LINK_LIBRARIES)
+ set_target_properties(arrow_static PROPERTEIS
+ INTERFACE_ILINK_LIBRARIES
"${arrow_static_interface_link_libraries};arrow_bundled_dependencies")
+ endif()
endif()
```
##########
File path: cpp/examples/minimal_build/Dockerfile
##########
@@ -22,5 +22,5 @@ ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -y -q && \
apt-get install -y -q --no-install-recommends \
build-essential \
- cmake && \
+ cmake &&\
Review comment:
Could you revert this?
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