1  # Copyright (c) 2023-present The Bitcoin Core developers
 2  # Distributed under the MIT software license, see the accompanying
 3  # file COPYING or https://opensource.org/license/mit/.
 4  
 5  include_guard(GLOBAL)
 6  
 7  #[=[
 8  Check once if C++ source code can be compiled.
 9  
10  Options:
11  
12    CXXFLAGS - A list of additional flags to pass to the compiler.
13  
14    LDFLAGS - A list of additional flags to pass to the linker.
15  
16    LINK_LIBRARIES - A list of libraries to add to the link command.
17  
18  For historical reasons, among the CMake `CMAKE_REQUIRED_*` variables that influence
19  `check_cxx_source_compiles()`, only `CMAKE_REQUIRED_FLAGS` is a string rather than
20  a list. Additionally, `target_compile_options()` also expects a list of options.
21  
22  The `check_cxx_source_compiles_with_flags()` function handles this case and accepts
23  `CXXFLAGS` as a list, simplifying the code at the caller site.
24  
25  #]=]
26  function(check_cxx_source_compiles_with_flags source result_var)
27    cmake_parse_arguments(PARSE_ARGV 2 _ "" "" "CXXFLAGS;LDFLAGS;LINK_LIBRARIES")
28    list(JOIN __CXXFLAGS " " CMAKE_REQUIRED_FLAGS)
29    set(CMAKE_REQUIRED_LINK_OPTIONS ${__LDFLAGS})
30    set(CMAKE_REQUIRED_LIBRARIES ${__LINK_LIBRARIES})
31    include(CheckCXXSourceCompiles)
32    check_cxx_source_compiles("${source}" ${result_var})
33    set(${result_var} ${${result_var}} PARENT_SCOPE)
34  endfunction()