From 84bfebdf4096e462cca8e8c198a8c5849832b322 Mon Sep 17 00:00:00 2001
From: Charles Karney <charles@karney.com>
Date: Tue, 20 Mar 2018 13:27:43 -0400
Subject: For the Intel compiler use "-fp-model precise" on all platforms.

---
 CMakeLists.txt | 2 +-
 configure.ac   | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8a60b540..02de6a81 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,7 @@ if (CMAKE_C_COMPILER_ID STREQUAL "Intel")
   if (MSVC)
     set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /fp:precise")
   else ()
-    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fprotect-parens -fsigned-zeros")
+    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fp-model precise")
   endif ()
 endif ()
 
diff --git a/configure.ac b/configure.ac
index ee5fc507..66da9d13 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,8 +33,8 @@ dnl Check flag for accurate arithmetic with Intel compiler.  This is
 dnl needed to stop the compiler from ignoring parentheses in expressions
 dnl like (a + b) + c and from simplifying 0.0 + x to x (which is wrong if
 dnl x = -0.0).
-AX_CHECK_COMPILE_FLAG([-fprotect-parens -fsigned-zeros],
-        [CFLAGS="$CFLAGS -fprotect-parens -fsigned-zeros"],,[-Werror])
+AX_CHECK_COMPILE_FLAG([-fp-model precise],
+        [CFLAGS="$CFLAGS -fp-model precise"],,[-Werror])
 dnl Check for C99 math functions
 save_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -Wall -Werror"
@@ -113,8 +113,8 @@ dnl posix mutexes for instance).
 dnl ---------------------------------------------------------------------------
 
 AC_ARG_WITH([mutex],
-	    AS_HELP_STRING([--without-mutex],
-	       [Disable real mutex locks (lacking pthreads)]),,)
+            AS_HELP_STRING([--without-mutex],
+               [Disable real mutex locks (lacking pthreads)]),,)
 
 AC_MSG_CHECKING([for mutexes])
 THREAD_LIB=""
-- 
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