add checks that Flang f18 doesn't have yet

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.19...3.28)
+cmake_minimum_required(VERSION 3.19...3.29)
 
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
   message(FATAL_ERROR "Please specify build directory like:
@@ -16,10 +16,11 @@ include(CheckSourceCompiles)
 
 # --- compiler checks
 
-foreach(i IN ITEMS f03ieee f03utf8
-  f08contig f08kind
+foreach(i IN ITEMS f03abstract f03charalloc f03ieee f03utf8 f03selectType
+  f08contig f08execute f08kind
   f18abstract f18assumed_rank f18prop f18random
   f2023rank_integer f2023ternary f2023tokenize f2023real16)
+
   include(cmake/${i}.cmake)
 endforeach()
 

cmake/f03abstract.cmake

@@ -0,0 +1,19 @@
+check_source_compiles(Fortran
+"program abst
+
+implicit none
+
+type, abstract :: L1
+integer, pointer :: bullseye(:,:)
+end type L1
+
+type, extends(L1) :: L2
+integer, pointer :: arrow(:)
+end type L2
+
+class(L2), allocatable :: obj
+
+end program
+"
+f03abstract
+)

cmake/f03charalloc.cmake

@@ -0,0 +1,11 @@
+check_source_compiles(Fortran
+"program a
+implicit none
+character(:), allocatable :: x(:)
+
+character(:), allocatable :: flex(:), scalar
+
+flex = [character(5) :: 'hi', 'hello']
+end program"
+f03charalloc
+)

cmake/f03selectType.cmake

@@ -0,0 +1,29 @@
+check_source_compiles(Fortran
+"
+program selectType
+implicit none
+real :: r
+integer :: i
+
+call selector(r)
+call selector(i)
+
+contains
+
+subroutine selector(x)
+
+class(*), intent(in) :: x
+
+select type (x)
+  type is (real)
+    print *, 'real'
+  type is (integer)
+    print *, 'integer'
+end select
+
+end subroutine
+
+end program
+"
+f03selectType
+)

cmake/f08execute.cmake

@@ -0,0 +1,9 @@
+check_source_compiles(Fortran
+"program a
+implicit none
+
+call execute_command_line('echo hello')
+
+end program"
+f08execute
+)

cmake/f08kind.cmake

@@ -3,6 +3,8 @@ check_source_compiles(Fortran
 use, intrinsic:: iso_fortran_env, only: real128
 use, intrinsic:: ieee_arithmetic, only: ieee_is_nan
 
+real(real128) :: pi128 = 4*atan(1.0_real128)
+
 print *, huge(0._real128)
 print *, ieee_is_nan(0._real128)
 

src/system/CMakeLists.txt

@@ -2,6 +2,7 @@ set_property(DIRECTORY PROPERTY LABELS system)
 
 add_library(osdet OBJECT os_detect.f90)
 
+if(f08execute)
 find_package(Python COMPONENTS Interpreter)
 
 add_executable(callpython call_python_script.f90)
@@ -12,3 +13,4 @@ find_program(FFPLAY NAMES ffplay)
 add_executable(playsound play_sound.f90)
 add_test(NAME PlaySound COMMAND playsound ${CMAKE_CURRENT_SOURCE_DIR}/bell.aac)
 set_property(TEST PlaySound PROPERTY DISABLED $<NOT:$<BOOL:${FFPLAY}>>)
+endif()

test/array/CMakeLists.txt

@@ -1,7 +1,9 @@
 set_property(DIRECTORY PROPERTY LABELS array)
 
+if(f03selectType)
 add_executable(rotflip test_rot90.f90 ${PROJECT_SOURCE_DIR}/src/array/rot90.f90)
 add_test(NAME RotFlip COMMAND rotflip)
+endif()
 
 add_executable(auto_allocate_array auto_allocate.f90)
 target_compile_options(auto_allocate_array PRIVATE

test/character/CMakeLists.txt

@@ -1,8 +1,14 @@
 set_property(DIRECTORY PROPERTY LABELS character)
 
-foreach(t IN ITEMS ascii character_allocatable character_array charlen
+set(tests ascii character_array charlen
 color_text
 print_vs_write overwrite_stdout special_characters str2int utf8)
+
+if(f03charalloc)
+  list(APPEND tests character_allocatable)
+endif()
+
+foreach(t IN LISTS tests)
   add_executable(${t} ${t}.f90)
   add_test(NAME ${t} COMMAND ${t})
 endforeach()

test/io/CMakeLists.txt

@@ -6,12 +6,16 @@ foreach(t IN ITEMS devnull leading_zeros terminal_size)
 endforeach()
 
 
+if(f03selectType)
+
 add_library(logging OBJECT ${PROJECT_SOURCE_DIR}/src/io/logging.f90)
 
 add_executable(append_file append_file.f90 unlink.f90)
 target_link_libraries(append_file PRIVATE logging)
 add_test(NAME appendFile COMMAND append_file)
 
+endif()
+
 add_executable(termio ${PROJECT_SOURCE_DIR}/app/io/terminal_io.f90)
 add_test(NAME terminal
 COMMAND ${CMAKE_COMMAND}

test/pointer/CMakeLists.txt

@@ -1,6 +1,11 @@
 set_property(DIRECTORY PROPERTY LABELS pointer)
 
-foreach(t IN ITEMS null_pointer derived_type)
+set(tests null_pointer)
+if(f03abstract)
+  list(APPEND tests derived_type)
+endif()
+
+foreach(t IN LISTS tests)
   add_executable(${t} ${t}.f90)
   add_test(NAME ${t} COMMAND ${t})
 endforeach()

test/submodule/CMakeLists.txt

@@ -1,5 +1,9 @@
 set_property(DIRECTORY PROPERTY LABELS submodule)
 
+if(NOT f03selectType)
+  return()
+endif()
+
 foreach(t IN ITEMS explicit procedure)
   add_executable(${t} ${t}.f90)
   add_test(NAME ${t} COMMAND ${t})