Disable the optimized Intel Math Library for PP/AN and WS compilations

Specifying -lm before the object file has the effect of using the standard GNU math library instead of the optimized Intel Math library for C programs. Additionally, add the -xsse2 option to use a stricter set of ISA than the default -msse2, which is also used for the gaea settings.
NOAA-GFDL · Dec 8, 2021 · 2e5c68c · 2e5c68c
1 parent ada43ac
commit 2e5c68c
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/site-configs/gfdl-ws/config.site b/site-configs/gfdl-ws/config.site
@@ -29,4 +29,7 @@ test -z "$CC" && CC=icc
 test -z "$FC" && FC=ifort
 
 # Compile/Link flags
-test -z "$FCFLAGS" && FCFLAGS="-fltconsistency -fno-alias -stack_temps -ftz -assume byterecl -i4 -traceback"
+# Note: using -lm before the object file causes the Intel compiler to use the
+#       standard GNU math library instead of the optimized Intel Math library
+test -z "$CFLAGS" && CFLAGS="-xSSE2 -lm"
+test -z "$FCFLAGS" && FCFLAGS="-fltconsistency -fno-alias -stack_temps -ftz -assume byterecl -i4 -traceback -xSSE2"
diff --git a/site-configs/gfdl/config.site b/site-configs/gfdl/config.site
@@ -29,4 +29,7 @@ test -z "$CC" && CC=icc
 test -z "$FC" && FC=ifort
 
 # Compile/Link flags
-test -z "$FCFLAGS" && FCFLAGS="-fltconsistency -fno-alias -stack_temps -ftz -assume byterecl -i4 -traceback"
+# Note: using -lm before the object file causes the Intel compiler to use the
+#       standard GNU math library instead of the optimized Intel Math library
+test -z "$CFLAGS" && CFLAGS="-xSSE2 -lm"
+test -z "$FCFLAGS" && FCFLAGS="-fltconsistency -fno-alias -stack_temps -ftz -assume byterecl -i4 -traceback -xSSE2"