Add compile flag -fno-finite-math-only for Intel LLVM compiler (icx, …

…icpx)
ecmwf · Nov 22, 2023 · 93082b9 · 93082b9
1 parent 99207ce
commit 93082b9
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/cmake/atlas_compile_flags.cmake b/cmake/atlas_compile_flags.cmake
@@ -24,4 +24,11 @@ endif()
 if( CMAKE_CXX_COMPILER_ID MATCHES NVHPC )
   ecbuild_add_cxx_flags("--diag_suppress declared_but_not_referenced --display_error_number" NAME atlas_cxx_disable_warnings )
   # For all the variables with side effects (constructor/dectructor functionality)
-endif()
+endif()
+
+if( CMAKE_CXX_COMPILER_ID MATCHES IntelLLVM )
+  # Turn off -ffinite-math-only which gets included by some optimisation levels which assumes values can never be NaN.
+  # Then results in std::isnan(value) always retrun false.
+  ecbuild_add_cxx_flags("-fno-finite-math-only")
+endif()
+