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Merge d3f42fa08f into 66aa6a47bd

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Hennadii Stepanov 2025-01-08 20:44:42 +01:00 committed by GitHub
commit 6a9b4394a9
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2 changed files with 32 additions and 10 deletions
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12
CMakeLists.txt
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@ -186,16 +186,8 @@ string(APPEND CMAKE_CXX_LINK_EXECUTABLE " ${APPEND_LDFLAGS}")
set(configure_warnings) set(configure_warnings)
include(CheckPIESupported) include(CheckLinkerSupportsPIE)
check_pie_supported(OUTPUT_VARIABLE check_pie_output LANGUAGES CXX) check_linker_supports_pie(configure_warnings)
if(CMAKE_CXX_LINK_PIE_SUPPORTED)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
elseif(NOT WIN32)
# The warning is superfluous for Windows.
message(WARNING "PIE is not supported at link time: ${check_pie_output}")
list(APPEND configure_warnings "Position independent code disabled.")
endif()
unset(check_pie_output)
# The core_interface library aims to encapsulate common build flags. # The core_interface library aims to encapsulate common build flags.
# It is a usage requirement for all targets except for secp256k1, which # It is a usage requirement for all targets except for secp256k1, which

30
cmake/module/CheckLinkerSupportsPIE.cmake Normal file
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@ -0,0 +1,30 @@
# Copyright (c) 2024-present The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or https://opensource.org/license/mit/.
include_guard(GLOBAL)
function(check_linker_supports_pie warnings)
# This forces running a linker.
set(CMAKE_TRY_COMPILE_TARGET_TYPE EXECUTABLE)
# Workaround for a bug in the check_pie_supported() function.
# See:
# - https://gitlab.kitware.com/cmake/cmake/-/issues/26463
# - https://gitlab.kitware.com/cmake/cmake/-/merge_requests/10034
if(CMAKE_VERSION VERSION_LESS 3.32)
# CMAKE_CXX_COMPILE_OPTIONS_PIE is a list, whereas CMAKE_REQUIRED_FLAGS
# must be a string. Therefore, a proper conversion is required.
list(JOIN CMAKE_CXX_COMPILE_OPTIONS_PIE " " CMAKE_REQUIRED_FLAGS)
endif()
include(CheckPIESupported)
check_pie_supported(OUTPUT_VARIABLE output LANGUAGES CXX)
if(CMAKE_CXX_LINK_PIE_SUPPORTED)
set(CMAKE_POSITION_INDEPENDENT_CODE ON PARENT_SCOPE)
elseif(NOT WIN32)
# The warning is superfluous for Windows.
message(WARNING "PIE is not supported at link time: ${output}")
set(${warnings} ${${warnings}} "Position independent code disabled." PARENT_SCOPE)
endif()
endfunction()