From: Arnaud Giersch <arnaud.giersch@univ-fcomte.fr>
Date: Thu, 12 May 2022 15:59:35 +0000 (+0200)
Subject: Fix build with Eigen3 and Imtel compiler.
X-Git-Tag: v3.32~245
X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/76ec29f832083ef95c56afbd1e11fc29856a0770

Fix build with Eigen3 and Imtel compiler.
---

diff --git a/tools/cmake/Flags.cmake b/tools/cmake/Flags.cmake
index 5afc1f0837..de55de01d4 100644
--- 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)