simplify checks

Author: scivision

test/iso_fortran_binding/CMakeLists.txt

@@ -12,16 +12,9 @@ endif()
 
 check_include_file_cxx(span HAVE_SPAN)
 
-if(NOT HAVE_SPAN OR
-    (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU" AND
-     CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 12))
-  set(sampling_old TRUE)
-endif()
-
-if(NOT sampling_old)
+if(HAVE_SPAN)
 add_executable(sampling sampling.cpp sampling.f90)
 set_property(TARGET sampling PROPERTY LINKER_LANGUAGE CXX)
-target_compile_features(sampling PRIVATE cxx_std_20)
 
 add_test(NAME sampling COMMAND sampling)
 endif()

test/iterator/CMakeLists.txt

@@ -1,6 +1,4 @@
-
 add_library(int_iterator OBJECT lib.cpp)
-target_compile_features(int_iterator PUBLIC cxx_std_20)
 target_include_directories(int_iterator PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 
 # glitch in arm64 GitHub Actions. Happened on other projects too (h5fortran-mpi)