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LLVMFlang: Support Flang 18 and 19 on Apple platforms

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Flang gained -Xlinker only in LLVM 20, so the Apple linker flags added
by commit 18d65b9d4b (LLVMFlang: Fix Fortran shared library creation on
Apple platforms, 2026-09-23) fail with older Flang.  For those versions
the flags now go through -Wl, with the install name joined to its flag.
Flang 20 and later keep the -Xlinker form.

Fixes: #28148
This commit is contained in:
Daksh Mamodiya authored and Brad King committed 2026-10-14 09:35:43 -04:00
1 parent c739e7ae98
commit 45208d7353
2 files changed
+20 -4
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Modules/Platform/Apple-LLVMFlang-Fortran.cmake
+17 -4
View File
@@ -3,7 +3,20 @@
# LLVM Flang requires Darwin linker flags to be passed through its linker
# wrapper rather than directly to the compiler driver.
set(CMAKE_Fortran_OSX_COMPATIBILITY_VERSION_FLAG "-Xlinker -compatibility_version -Xlinker ")
set(CMAKE_Fortran_OSX_CURRENT_VERSION_FLAG "-Xlinker -current_version -Xlinker ")
set(CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS "-Xlinker -bundle")
set(CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG "-Xlinker -install_name -Xlinker ")
if(CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 20)
# Flang < 20 has no -Xlinker. The -Wl, form needs the install name joined
# to its flag, without the space Darwin.cmake leaves after <SONAME_FLAG>.
set(CMAKE_Fortran_OSX_COMPATIBILITY_VERSION_FLAG "-Wl,-compatibility_version,")
set(CMAKE_Fortran_OSX_CURRENT_VERSION_FLAG "-Wl,-current_version,")
set(CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS "-Wl,-bundle")
set(CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG "-Wl,-install_name,")
foreach(rule IN ITEMS CREATE_SHARED_LIBRARY CREATE_MACOSX_FRAMEWORK)
set(CMAKE_Fortran_${rule}
"<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG><TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
endforeach()
else()
set(CMAKE_Fortran_OSX_COMPATIBILITY_VERSION_FLAG "-Xlinker -compatibility_version -Xlinker ")
set(CMAKE_Fortran_OSX_CURRENT_VERSION_FLAG "-Xlinker -current_version -Xlinker ")
set(CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS "-Xlinker -bundle")
set(CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG "-Xlinker -install_name -Xlinker ")
endif()
Tests/Fortran/CMakeLists.txt
+3
View File
@@ -50,6 +50,9 @@ add_library(hello STATIC hello.f)
add_library(world ${_SHARED} world.f ${world_def})
if(APPLE AND CMAKE_Fortran_COMPILER_ID STREQUAL "LLVMFlang")
set_target_properties(world PROPERTIES VERSION 1.2.3 SOVERSION 1)
add_library(world_module MODULE world.f)
add_library(world_framework SHARED world.f)
set_target_properties(world_framework PROPERTIES FRAMEWORK TRUE)
endif()
add_executable(testf testf.f)
target_link_libraries(testf hello world)