Fix build with Eigen3 and Imtel compiler.

diff --git a/tools/cmake/Flags.cmake b/tools/cmake/Flags.cmake
index 5afc1f0..de55de0 100644 (file)
--- a/tools/cmake/Flags.cmake
+++ b/tools/cmake/Flags.cmake
@@ -191,7 +191,8 @@ endif()
 
 if (CMAKE_C_COMPILER_ID MATCHES "Intel")
   # honor parentheses when determining the order of expression evaluation.
-  set(optCFLAGS "${optCFLAGS} -fprotect-parens ")
+  # disallow optimizations for floating-point arithmetic with Nans or +-Infs (breaks Eigen3)
+  set(optCFLAGS "${optCFLAGS} -fprotect-parens -fno-finite-math-only")
 endif()
 
 if(NOT enable_debug)