Fix warnings with Intel 2021.4

[alexxy/gromacs.git] / cmake / gmxTestCompilerProblems.cmake

diff --git a/cmake/gmxTestCompilerProblems.cmake b/cmake/gmxTestCompilerProblems.cmake
index 59848df2f1f43035d9900a2bc17f8cdd07bac33c..c382cc85bbf57d59fe9ee3c69b7e35b8dcccb7c6 100644 (file)
--- a/cmake/gmxTestCompilerProblems.cmake
+++ b/cmake/gmxTestCompilerProblems.cmake
@@ -75,6 +75,12 @@ macro(gmx_test_compiler_problems)
     if (CMAKE_CXX_COMPILER_ID MATCHES "Intel" AND NOT CMAKE_CXX_COMPILER_ID MATCHES "IntelLLVM")
         message(WARNING "The Intel classic compiler is no longer supported. It may pass the tests, but is not tested by the GROMACS developers. Use the clang-based compiler from oneAPI, or gcc")
     endif()
+    # Intel LLVM 2021.2 defaults to no-finite-math which isn't OK for GROMACS and its dependencies (muParser and GTest).
+    # This is why we set the flags globally via CMAKE_CXX_FLAGS
+    if(GMX_INTEL_LLVM AND GMX_INTEL_LLVM_VERSION GREATER_EQUAL 2021020)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-finite-math-only")
+    endif()
+
 
     if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "XL")
         check_cxx_source_compiles(