Adding CMake files to build libcaffeine and native-multi-image test.

This commit contains the necessary files to build libcaffeine with CMake.
It also builds required dependencies such as libassert and GASNet-ex if
they are not found.
The native-mult-image test is also built if the LLVMFlang compiler is
used (currently it is the only one that supports PRIF lowering).

Author: JDPailleux

CMakeLists.txt

@@ -0,0 +1,128 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+project(caffeine LANGUAGES C CXX Fortran)
+include(ExternalProject)
+
+if(NOT DEFINED BUILD_SHARED_LIBS)
+  set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries" FORCE)
+endif()
+
+add_subdirectory(src)
+
+# ---------------------------------------------------------
+# Dependencies
+# ---------------------------------------------------------
+if (NOT DEFINED CMAKE_INSTALL_PREFIX)
+  set(CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/install)
+endif()
+
+target_include_directories(caffeine PUBLIC ${CMAKE_BINARY_DIR}/include)
+target_include_directories(caffeine PUBLIC ${CMAKE_SOURCE_DIR}/include)
+
+message(STATUS "CMAKE_Fortran_COMPILER_ID: ${CMAKE_Fortran_COMPILER_ID}")
+if(CMAKE_Fortran_COMPILER_ID STREQUAL "LLVMFlang")
+  set(Fortran_COMPILER "flang-new")
+endif()
+
+# --------
+# Assert
+# --------
+SET(ASSERT_GIT "https://github.com/berkeleylab/assert.git")
+SET(ASSERT_TAG "3.0.2")
+ExternalProject_Add(assert_lib 
+  GIT_REPOSITORY ${ASSERT_GIT} 
+  GIT_TAG ${ASSERT_TAG}
+  CONFIGURE_COMMAND ""
+  INSTALL_DIR ${CMAKE_BINARY_DIR}
+  BUILD_COMMAND fpm build --compiler ${Fortran_COMPILER} 
+  INSTALL_COMMAND 
+  	fpm install --prefix=<INSTALL_DIR> --compiler ${Fortran_COMPILER} &&
+      ${CMAKE_COMMAND} -E make_directory <INSTALL_DIR> &&
+      ${CMAKE_COMMAND} -E copy_directory <SOURCE_DIR>/include <INSTALL_DIR>/include
+  BUILD_IN_SOURCE 1
+)
+
+add_library(assert_lib_external STATIC IMPORTED)
+set_target_properties(assert_lib_external PROPERTIES
+    IMPORTED_LOCATION ${CMAKE_BINARY_DIR}/lib/libassert.a
+    INTERFACE_INCLUDE_DIRECTORIES $<INSTALL_INTERFACE:${CMAKE_BINARY_DIR}/include>
+)
+add_dependencies(assert_lib_external assert_lib)
+target_link_libraries(caffeine PRIVATE assert_lib_external)
+
+# -----------
+# GASNet-EX
+# -----------
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+if (NOT DEFINED GASNet_THREADING)
+  set(GASNet_THREADING seq)
+endif()
+if (NOT DEFINED GASNet_PREFERRED_CONDUITS)
+  set(GASNet_PREFERRED_CONDUITS smp)
+endif()
+
+find_package(GASNet QUIET)
+if (NOT GASNet_FOUND)
+  set(GASNet_TAG "2025.8.0")
+  set(GASNet_MD5 "7f61c16c6d06e9789157b3b6804e1927")
+  message(STATUS "Cannot find GASNet-Ex, maybe GASNet_ROOT variable is not set.")
+  message(STATUS "Configuration and building of GASNet-Ex from release ${GASNet_TAG}.")
+  if(BUILD_SHARED_LIBS)
+    if(NOT CMAKE_C_FLAGS MATCHES "-fPIC")
+      set(CMAKE_C_FLAGS "-fPIC ${CMAKE_C_FLAGS}")
+    endif()
+    if(NOT CMAKE_CXX_FLAGS MATCHES "-fPIC")
+      set(CMAKE_CXX_FLAGS "-fPIC ${CMAKE_CXX_FLAGS}")
+    endif()
+  endif()
+  ExternalProject_Add(gasnet_ex
+      URL https://gasnet.lbl.gov/EX/GASNet-${GASNet_TAG}.tar.gz
+      URL_HASH MD5=${GASNet_MD5}
+      INSTALL_DIR ${CMAKE_BINARY_DIR}/gasnet
+      DOWNLOAD_EXTRACT_TIMESTAMP TRUE
+      DOWNLOAD_NO_EXTRACT FALSE
+      CONFIGURE_COMMAND 
+        <SOURCE_DIR>/configure --prefix=<INSTALL_DIR> --enable-static --enable-seq --with-cflags=${CMAKE_C_FLAGS} --with-cppflags=${CMAKE_CXX_FLAGS} 
+      BUILD_COMMAND make -j
+      INSTALL_COMMAND make install
+      BUILD_IN_SOURCE 1
+  )
+  set(GASNET_INSTALL ${CMAKE_BINARY_DIR}/gasnet)
+  add_library(gasnet_lib STATIC IMPORTED)
+  set_target_properties(gasnet_lib PROPERTIES
+    INTERFACE_COMPILE_DEFINITIONS "GASNET_CONDUIT_SMP;GASNET_SEQ"
+      IMPORTED_LOCATION ${GASNET_INSTALL}/lib/libgasnet-smp-seq.a
+      INTERFACE_INCLUDE_DIRECTORIES $<INSTALL_INTERFACE:${GASNET_INSTALL}/include>
+  )
+  add_dependencies(gasnet_lib gasnet_ex)
+  target_link_libraries(caffeine PUBLIC gasnet_lib)
+  target_include_directories(caffeine PUBLIC ${GASNET_INSTALL}/include)
+  target_include_directories(caffeine PUBLIC ${GASNET_INSTALL}/include/smp-conduit)
+else()
+  target_link_libraries(caffeine PUBLIC GASNet::GASNet)
+endif()
+
+# ---------------------------------------------------------
+# Installation 
+# ---------------------------------------------------------
+install(TARGETS caffeine
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+)
+
+# ---------------------------------------------------------
+# Test using App 
+# ---------------------------------------------------------
+if(CMAKE_Fortran_COMPILER_ID STREQUAL "LLVMFlang")
+  # If you want to view the test logs, please run : make test ARGS="--verbose"
+  enable_testing()
+  add_executable(test_native_multi_image app/native-multi-image.F90)
+  
+  target_compile_options(test_native_multi_image PRIVATE "-fcoarray" "-cpp" "-DHAVE_MULTI_IMAGE")
+  target_link_libraries(test_native_multi_image PRIVATE caffeine)
+  
+  add_test(NAME TestNativeMultiImage COMMAND test_native_multi_image)
+else()
+  message(STATUS "${CMAKE_Fortran_COMPILER_ID} doesn't support lowering to PRIF, not test can't be built.")
+endif()