Johannes Doerfert 330d8983d2
[Offload] Move /openmp/libomptarget to /offload (#75125)
In a nutshell, this moves our libomptarget code to populate the offload
subproject.

With this commit, users need to enable the new LLVM/Offload subproject
as a runtime in their cmake configuration.
No further changes are expected for downstream code.

Tests and other components still depend on OpenMP and have also not been
renamed. The results below are for a build in which OpenMP and Offload
are enabled runtimes. In addition to the pure `git mv`, we needed to
adjust some CMake files. Nothing is intended to change semantics.

```
ninja check-offload
```
Works with the X86 and AMDGPU offload tests

```
ninja check-openmp
```
Still works but doesn't build offload tests anymore.

```
ls install/lib
```
Shows all expected libraries, incl.
- `libomptarget.devicertl.a`
- `libomptarget-nvptx-sm_90.bc`
- `libomptarget.rtl.amdgpu.so` -> `libomptarget.rtl.amdgpu.so.18git`
- `libomptarget.so` -> `libomptarget.so.18git`

Fixes: https://github.com/llvm/llvm-project/issues/75124

---------

Co-authored-by: Saiyedul Islam <Saiyedul.Islam@amd.com>
2024-04-22 09:51:33 -07:00

90 lines
4.1 KiB
CMake

if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux")
return()
endif()
set(supported_targets x86_64 aarch64 ppc64 ppc64le s390x)
if(NOT ${CMAKE_SYSTEM_PROCESSOR} IN_LIST supported_targets)
libomptarget_say("Not building ${machine} NextGen offloading plugin")
return()
endif()
set(machine ${CMAKE_SYSTEM_PROCESSOR})
if(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le$")
set(machine ppc64)
endif()
# Create the library and add the default arguments.
add_target_library(omptarget.rtl.${machine} ${machine})
target_sources(omptarget.rtl.${machine} PRIVATE src/rtl.cpp)
if(LIBOMPTARGET_DEP_LIBFFI_FOUND)
libomptarget_say("Building ${machine} plugin linked with libffi")
if(FFI_STATIC_LIBRARIES)
target_link_libraries(omptarget.rtl.${machine} PRIVATE FFI::ffi_static)
else()
target_link_libraries(omptarget.rtl.${machine} PRIVATE FFI::ffi)
endif()
else()
libomptarget_say("Building ${machine} plugin for dlopened libffi")
target_sources(omptarget.rtl.${machine} PRIVATE dynamic_ffi/ffi.cpp)
target_include_directories(omptarget.rtl.${machine} PRIVATE dynamic_ffi)
endif()
# Install plugin under the lib destination folder.
install(TARGETS omptarget.rtl.${machine}
LIBRARY DESTINATION "${OFFLOAD_INSTALL_LIBDIR}")
set_target_properties(omptarget.rtl.${machine} PROPERTIES
INSTALL_RPATH "$ORIGIN" BUILD_RPATH "$ORIGIN:${CMAKE_CURRENT_BINARY_DIR}/.."
POSITION_INDEPENDENT_CODE ON
CXX_VISIBILITY_PRESET protected)
target_include_directories(omptarget.rtl.${machine} PRIVATE
${LIBOMPTARGET_INCLUDE_DIR})
if(LIBOMPTARGET_DEP_LIBFFI_FOUND)
list(APPEND LIBOMPTARGET_TESTED_PLUGINS omptarget.rtl.${machine})
set(LIBOMPTARGET_TESTED_PLUGINS
"${LIBOMPTARGET_TESTED_PLUGINS}" PARENT_SCOPE)
else()
libomptarget_say("Not generating ${tmachine_name} tests. LibFFI not found.")
endif()
# Define the target specific triples and ELF machine values.
if(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64le$")
target_compile_definitions(omptarget.rtl.${machine} PRIVATE TARGET_ELF_ID=EM_PPC64)
target_compile_definitions(omptarget.rtl.${machine} PRIVATE
LIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE="powerpc64le-ibm-linux-gnu")
list(APPEND LIBOMPTARGET_SYSTEM_TARGETS
"powerpc64le-ibm-linux-gnu" "powerpc64le-ibm-linux-gnu-LTO")
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "ppc64$")
target_compile_definitions(omptarget.rtl.${machine} PRIVATE TARGET_ELF_ID=EM_PPC64)
target_compile_definitions(omptarget.rtl.${machine} PRIVATE
LIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE="powerpc64-ibm-linux-gnu")
list(APPEND LIBOMPTARGET_SYSTEM_TARGETS
"powerpc64-ibm-linux-gnu" "powerpc64-ibm-linux-gnu-LTO")
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64$")
target_compile_definitions(omptarget.rtl.${machine} PRIVATE TARGET_ELF_ID=EM_X86_64)
target_compile_definitions(omptarget.rtl.${machine} PRIVATE
LIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE="x86_64-pc-linux-gnu")
list(APPEND LIBOMPTARGET_SYSTEM_TARGETS
"x86_64-pc-linux-gnu" "x86_64-pc-linux-gnu-LTO")
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64$")
target_compile_definitions(omptarget.rtl.${machine} PRIVATE TARGET_ELF_ID=EM_AARCH64)
target_compile_definitions(omptarget.rtl.${machine} PRIVATE
LIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE="aarch64-unknown-linux-gnu")
list(APPEND LIBOMPTARGET_SYSTEM_TARGETS
"aarch64-unknown-linux-gnu" "aarch64-unknown-linux-gnu-LTO")
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "s390x$")
target_compile_definitions(omptarget.rtl.${machine} PRIVATE TARGET_ELF_ID=EM_S390)
target_compile_definitions(omptarget.rtl.${machine} PRIVATE
LIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE="s390x-ibm-linux-gnu")
list(APPEND LIBOMPTARGET_SYSTEM_TARGETS
"s390x-ibm-linux-gnu" "s390x-ibm-linux-gnu-LTO")
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
endif()