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Update Check for module support to include compiler versions (#4709)

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- We need to confirm compiler support for module scanning before
  creating the CXX_MODULE FILE_SET using the `target_sources` command
- This is especially relevant for compilers that have module support but
  do not support the module scanning such as g++13, clang15. For these
    we can use the older way of creating the fmt-module target

Co-authored-by: Mathew Benson <mathew@benson.co.ke>
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Mathew Benson 2026-03-10 01:37:46 +03:00 committed by GitHub
parent c29b64dde7
commit 2b4eb7df47
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1 changed files with 15 additions and 3 deletions
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18
CMakeLists.txt
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@ -50,16 +50,28 @@ endif ()
project(FMT CXX)
# Determine support for the C++ module scanning.
# Requires C++20, CMake >= 3.28 and (Ninja >= 1.11 OR Visual Studio >= 17.4).
set(FMT_USE_CMAKE_MODULES FALSE)
# Determine support for the C++ module scanning and CXX_MODULE File_Sets
# Requires C++20, CMake >= 3.28 and
# Generators(Ninja >= 1.11 OR Visual Studio >= 17.4).
# Compilers GCC>=14, Clang>=16 or MSVC >= 17.4
# Source: https://cmake.org/cmake/help/latest/manual/cmake-cxxmodules.7.html
Set(FMT_USE_CMAKE_MODULES FALSE)
if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.28 AND CMAKE_CXX_STANDARD
GREATER_EQUAL 20)
if (CMAKE_GENERATOR STREQUAL "Ninja")
execute_process(COMMAND "${CMAKE_MAKE_PROGRAM}" "--version"
OUTPUT_VARIABLE NINJA_VERSION)
if (NINJA_VERSION VERSION_GREATER_EQUAL 1.11)
if (
(CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 14)
OR(CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 16)
OR(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC"
AND MSVC_VERSION GREATER_EQUAL 1934)
)
set(FMT_USE_CMAKE_MODULES TRUE)
endif ()
endif ()
elseif (CMAKE_GENERATOR MATCHES "^Visual Studio" AND MSVC_VERSION
GREATER_EQUAL 1934)