From 91977210fb88d162e354d9556407e65de0bc02c5 Mon Sep 17 00:00:00 2001
From: "M. Scot Breitenfeld" <brtnfld@hdfgroup.org>
Date: Tue, 10 Oct 2023 14:38:28 -0500
Subject: [PATCH] added cmake ieee flag for nagfor

---
 config/cmake/HDFFortranCompilerFlags.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/config/cmake/HDFFortranCompilerFlags.cmake b/config/cmake/HDFFortranCompilerFlags.cmake
index 86d04315720..425b6aa109e 100644
--- a/config/cmake/HDFFortranCompilerFlags.cmake
+++ b/config/cmake/HDFFortranCompilerFlags.cmake
@@ -51,6 +51,10 @@ if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_Fortran_COMPILER_VERS
     set (CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fdiagnostics-urls=never -fno-diagnostics-color")
   endif ()
 endif ()
+if (CMAKE_Fortran_COMPILER_ID STREQUAL "NAG")
+    message (STATUS "... Select IEEE floating-point mode full")
+    list (APPEND HDF5_CMAKE_Fortran_FLAGS "-ieee=full")
+endif ()
 
 if (NOT MSVC AND NOT MINGW)
   # General flags