From 82be08b34a56f0d3e25ec8870e36ad59b4f1f619 Mon Sep 17 00:00:00 2001
From: Elena Pourmal <epourmal@hdfgroup.org>
Date: Fri, 8 Oct 2010 15:57:17 -0500
Subject: [svn-r19566] Maintenance: Added -O3 to be used with the C Intel v 11
 compilers; set default to -O for all              unknown versions of the C
 Intel compilers.              Modified apple config file to display Intel
 compiler information.              Updated RELEASE.txt notes accordingly.
 Platfroms tested: jam, amani and dubna (Mac 64-bit) with Intel C, Fortran and
 C++ compilers.

---
 config/apple             | 21 +++++++++++++++++++++
 config/intel-flags       | 14 +++++++-------
 release_docs/RELEASE.txt |  1 +
 3 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/config/apple b/config/apple
index 10674fb..babcdad 100644
--- a/config/apple
+++ b/config/apple
@@ -62,6 +62,11 @@ case $CC in
             grep 'GCC' | sed 's/.*\((GCC) [-a-z0-9\. ]*.*\)/\1/'`
         ;;
 
+    *icc*)
+        cc_version_info=`$CC $CCFLAGS $H5_CCFLAGS -V 2>&1 | grep 'Version' |\
+            sed 's/\(Intel.* Compiler\).*\( Version [a-z0-9\.]*\).*\( Build [0-9]*\)/\1\2\3/'`
+        ;;
+
     *)
         echo "No match to get cc_version_info for $CC"
         ;;
@@ -72,6 +77,16 @@ case $FC in
         fc_version_info=`$FC $FCFLAGS $H5_FCFLAGS --version 2>&1 |\
             grep 'GCC' | sed 's/\(.*(GCC) [-a-z0-9\. ]*\).*/\1/'`
         ;;
+
+    *ifc*|*ifort*)
+        fc_version_info=`$FC $FCFLAGS $H5_FCFLAGS -V 2>&1 | grep 'Version' |\
+            sed 's/\(Intel.* Compiler\).*\( Version [a-z0-9\.]*\).*\( Build [0-9]*\)/\1\2\3/'`
+        ;;
+
+     *)
+        echo "No match to get fc_version_info for $FC"
+        ;;
+
 esac
 
 # get c++ version info
@@ -80,6 +95,12 @@ case $CXX in
         cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS --version 2>&1 |\
             grep 'GCC' | sed 's/.*\((GCC) [-a-z0-9\. ]*.*\)/\1/'`
         ;;
+
+   *icpc*)
+        cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS -V 2>&1 | grep 'Version' |\
+            sed 's/\(Intel.* Compiler\).*\( Version [a-z0-9\.]*\).*\( Build [0-9]*\)/\1\2\3/'`
+        ;;
+
     *)
         echo "No match to get cxx_version_info for $CXX"
         ;;
diff --git a/config/intel-flags b/config/intel-flags
index 5bf06d4..e6a9c31 100644
--- a/config/intel-flags
+++ b/config/intel-flags
@@ -70,13 +70,8 @@ if test "X-icc" = "X-$cc_vendor"; then
     # Default to C99 standard.
     H5_CFLAGS="${H5_CFLAGS:--std=c99 $arch}"
 
-    # Production
-    # -Wl,-s to remove all symbols for smaller file
-    # O3 optimization causes compilation failures on many platforms;
-    # the problem exists in all versions of the icc compiler up to the latest 9.1
-    # I changed optimization flag to default -O2. EIP, 2006-08-15
-    #PROD_CFLAGS="-O3 -Wl,-s"
-    PROD_CFLAGS="-O2 -Wl,-s"
+    # Production is set to default; see settings for specific version further down
+    PROD_CFLAGS="-O" 
     PROD_CPPFLAGS=
 
     # Debug
@@ -98,6 +93,11 @@ fi
 # Please follow the pattern below by adding new versions at the top, copying
 # the information from the previous version and adding modifications to that.
 case "$cc_vendor-$cc_version" in
+    icc-11*)
+        # -s became obsolete; we also fixed bugs that allow us to enable higher level
+        # of optimization starting with 1.8.7
+        PROD_CFLAGS="-O3"
+        ;;
     icc-10*)
         PROD_CFLAGS="-O1 -Wl,-s"
         ;;
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index c4543ad..54063b1 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -240,6 +240,7 @@ New Features
 
 Support for new platforms, languages and compilers.
 =======================================
+    - Intel V11.1 uses now -O3 optimization in production mode (EIP - 2010/10/08)
     - PathScale compilers are recognized and can build the HDF5 library
       properly. AKC - 2009/7/28 -
 
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