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c3f3078884
Public flags, especially -Wxx (i.e. -Wno-XX) can hide some warnings,
that had been added in the main cmake rules of ClickHouse.
This patch had been tested manually with the following patch:
```patch
diff --git a/contrib/jemalloc-cmake/CMakeLists.txt b/contrib/jemalloc-cmake/CMakeLists.txt
index d5ea69d4926..7e79fba0c16 100644
--- a/contrib/jemalloc-cmake/CMakeLists.txt
+++ b/contrib/jemalloc-cmake/CMakeLists.txt
@@ -158,6 +158,7 @@ target_include_directories(_jemalloc SYSTEM PRIVATE
"${CMAKE_CURRENT_BINARY_DIR}/${JEMALLOC_INCLUDE_PREFIX}/jemalloc/internal")
target_compile_definitions(_jemalloc PRIVATE -DJEMALLOC_NO_PRIVATE_NAMESPACE)
+target_compile_options(_jemalloc INTERFACE -Wno-error) # also PUBLIC had been checked
if (CMAKE_BUILD_TYPE_UC STREQUAL "DEBUG")
target_compile_definitions(_jemalloc PRIVATE
```
And cmake gave:
CMake Error at cmake/sanitize_targets.cmake:69 (message):
_jemalloc set INTERFACE_COMPILE_OPTIONS to -Wno-error. This is forbidden.
Call Stack (most recent call first):
cmake/sanitize_targets.cmake:79 (sanitize_interface_flags)
CMakeLists.txt:595 (include)
Fixes: #12447
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
82 lines
3.4 KiB
CMake
82 lines
3.4 KiB
CMake
# https://stackoverflow.com/a/62311397/328260
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macro (get_all_targets_recursive targets dir)
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get_property (subdirectories DIRECTORY ${dir} PROPERTY SUBDIRECTORIES)
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foreach (subdir ${subdirectories})
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get_all_targets_recursive (${targets} ${subdir})
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endforeach ()
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get_property (current_targets DIRECTORY ${dir} PROPERTY BUILDSYSTEM_TARGETS)
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list (APPEND ${targets} ${current_targets})
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endmacro ()
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# When you will try to link target with the directory (that exists), cmake will
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# skip this without an error, only the following warning will be reported:
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#
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# target_link_libraries(main /tmp)
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#
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# WARNING: Target "main" requests linking to directory "/tmp". Targets may link only to libraries. CMake is dropping the item.
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#
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# And there is no cmake policy that controls this.
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# (I guess the reason that it is allowed is because of FRAMEWORK for OSX).
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#
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# So to avoid error-prone cmake rules, this can be sanitized.
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# There are the following ways:
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# - overwrite target_link_libraries()/link_libraries() and check *before*
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# calling real macro, but this requires duplicate all supported syntax
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# -- too complex
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# - overwrite target_link_libraries() and check LINK_LIBRARIES property, this
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# works great
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# -- but cannot be used with link_libraries()
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# - use BUILDSYSTEM_TARGETS property to get list of all targets and sanitize
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# -- this will work.
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function (get_all_targets var)
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set (targets)
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get_all_targets_recursive (targets ${CMAKE_CURRENT_SOURCE_DIR})
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set (${var} ${targets} PARENT_SCOPE)
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endfunction()
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function (sanitize_link_libraries target)
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get_target_property(target_type ${target} TYPE)
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if (${target_type} STREQUAL "INTERFACE_LIBRARY")
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get_property(linked_libraries TARGET ${target} PROPERTY INTERFACE_LINK_LIBRARIES)
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else()
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get_property(linked_libraries TARGET ${target} PROPERTY LINK_LIBRARIES)
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endif()
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foreach (linked_library ${linked_libraries})
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if (TARGET ${linked_library})
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# just in case, skip if TARGET
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elseif (IS_DIRECTORY ${linked_library})
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message(FATAL_ERROR "${target} requested to link with directory: ${linked_library}")
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endif()
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endforeach()
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endfunction()
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get_all_targets (all_targets)
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foreach (target ${all_targets})
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sanitize_link_libraries(${target})
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endforeach()
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#
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# Do not allow to define -W* from contrib publically (INTERFACE/PUBLIC).
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#
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function (get_contrib_targets var)
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set (targets)
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get_all_targets_recursive (targets ${CMAKE_CURRENT_SOURCE_DIR}/contrib)
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set (${var} ${targets} PARENT_SCOPE)
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endfunction()
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function (sanitize_interface_flags target)
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get_target_property(target_type ${target} TYPE)
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get_property(compile_definitions TARGET ${target} PROPERTY INTERFACE_COMPILE_DEFINITIONS)
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get_property(compile_options TARGET ${target} PROPERTY INTERFACE_COMPILE_OPTIONS)
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if (NOT "${compile_options}" STREQUAL "")
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message(FATAL_ERROR "${target} set INTERFACE_COMPILE_OPTIONS to ${compile_options}. This is forbidden.")
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endif()
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if ("${compile_definitions}" MATCHES "-Wl,")
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# linker option - OK
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elseif ("${compile_definitions}" MATCHES "-W")
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message(FATAL_ERROR "${target} contains ${compile_definitions} flags in INTERFACE_COMPILE_DEFINITIONS. This is forbidden.")
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endif()
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endfunction()
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get_contrib_targets (contrib_targets)
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foreach (contrib_target ${contrib_targets})
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sanitize_interface_flags(${contrib_target})
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endforeach()
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