Updates PGI C/C++ configurations (#715)

* Updates PGI C/C++ configurations

Tweaks some settings and configures pgc++ to use C++11

* Updated copyright information

MANIFEST

@@ -146,6 +146,7 @@
 ./config/lt_vers.am
 ./config/Makefile.am.blank
 ./config/netbsd
+./config/pgi-cxxflags
 ./config/pgi-fflags
 ./config/pgi-flags
 ./config/solaris

config/linux-gnulibc1

@@ -202,6 +202,9 @@ fi
 # Figure out GNU CXX compiler flags
 . $srcdir/config/gnu-cxxflags
 
+# Figure out PGI CXX compiler flags
+. $srcdir/config/pgi-cxxflags
+
 # Figure out Clang CXX compiler flags
 . $srcdir/config/clang-cxxflags
 
@@ -314,6 +317,9 @@ fi
 # check if the compiler_version_info is already set
 if test -z "$cxx_version_info"; then
 case $CXX in
+    *pgc++*)
+        cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS -V 2>&1 | grep 'pgc++'`
+        ;;
     *g++*)
         cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS --version 2>&1 |\
             grep 'GCC' | sed 's/\(.*(GCC) [-a-z0-9\. ]*\).*/\1/'`
@@ -322,10 +328,6 @@ case $CXX in
         cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS -V 2>&1 | grep 'Version' |\
             sed 's/\(Intel.* Compiler\).*\( Version [a-z0-9\.]*\).*\( Build [0-9]*\)/\1\2\3/'`
         ;;
-    *pgCC*)
-        cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS -V 2>&1 | grep 'pgCC'`
-        ;;
-
     *mpicxx*)
         cxx_version_info=`$CXX $CXXFLAGS $H5_CXXFLAGS -v 2>&1 | grep 'version' |\
             sed 's/^[a-z0-9]* for //' |\

config/pgi-cxxflags

@@ -0,0 +1,96 @@
+#							-*- shell-script -*-
+#
+# Copyright by The HDF Group.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://www.hdfgroup.org/licenses.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
+
+
+# This file should be sourced into configure if the compiler is the
+# PGI pgc++ compiler or a derivative.  It is careful not to do anything
+# if the compiler is not PGI; otherwise `cxx_flags_set' is set to `yes'
+#
+
+# Get the compiler version in a way that works for pgc++
+# pgc++ unless a compiler version is already known
+#
+#   cxx_vendor:    The compiler name: pgc++
+#   cxx_version:   Version number: 5.0-2, 5.2-2
+#
+if test X = "X$cxx_flags_set"; then
+    cxx_version="`$CXX $CXXFLAGS -V 2>&1 |grep '^pgc++ '`"
+    if test X != "X$cxx_version"; then
+        cxx_vendor=`echo $cxx_version |sed 's/\([a-z]*++\).*/\1/'`
+        cxx_version=`echo $cxx_version |sed 's/pgc++ \([-a-z0-9\.\-]*\).*/\1/'`
+        echo "compiler '$CXX' is PGI $cxx_vendor-$cxx_version"
+
+        # Some version numbers
+        # PGI version numbers are of the form: "major.minor-patch"
+        cxx_vers_major=`echo $cxx_version | cut -f1 -d.`
+        cxx_vers_minor=`echo $cxx_version | cut -f2 -d. | cut -f1 -d-`
+        cxx_vers_patch=`echo $cxx_version | cut -f2 -d. | cut -f2 -d-`
+        test -n "$cxx_vers_major" || cxx_vers_major=0
+        test -n "$cxx_vers_minor" || cxx_vers_minor=0
+        test -n "$cxx_vers_patch" || cxx_vers_patch=0
+        cxx_vers_all=`expr $cxx_vers_major '*' 1000000 + $cxx_vers_minor '*' 1000 + $cxx_vers_patch`
+    fi
+fi
+
+# Common PGI flags for various situations
+if test "X-pgc++" = "X-$cxx_vendor"; then
+
+    # C++-specific
+    H5_CXXFLAGS="$H5_CXXFLAGS -std=c++11 -Minform=warn"
+
+    ##############
+    # Production #
+    ##############
+
+    # NDEBUG is handled explicitly by the configure script
+    PROD_CXXFLAGS="-fast"
+
+    #########
+    # Debug #
+    #########
+
+    # NDEBUG is handled explicitly by the configure script
+    # -g is handled by the symbols flags
+    DEBUG_CXXFLAGS="-Mbounds"
+
+    ###########
+    # Symbols #
+    ###########
+
+    SYMBOLS_CXXFLAGS="-g"
+    NO_SYMBOLS_CXXFLAGS="-s"
+
+    #############
+    # Profiling #
+    #############
+
+    PROFILE_CXXFLAGS="-Mprof=func,line"
+    # Use this for profiling with gprof
+    #PROFILE_CXXFLAGS="-pg"
+
+    ################
+    # Optimization #
+    ################
+
+    HIGH_OPT_CXXFLAGS="-O4"
+    DEBUG_OPT_CXXFLAGS="-gopt -O2"
+    NO_OPT_CXXFLAGS="-O0"
+
+    # Flags are set
+    cxx_flags_set=yes
+fi
+
+# Clear cxx info if no flags set
+if test "X-$cxx_flags_set" = "X-"; then
+  cxx_vendor=
+  cxx_version=
+fi

config/pgi-flags

@@ -66,50 +66,45 @@ if test "X-pgcc" = "X-$cc_vendor"; then
     #esac
 
     # General
-    H5_CFLAGS="$H5_CFLAGS $arch -c99 -Minform=inform"
+    H5_CFLAGS="$H5_CFLAGS $arch -c99 -Minform=warn"
 
-    # Production
-    case "$cc_vendor-$cc_version" in
-      pgcc-10.6*)
-        PROD_CFLAGS=
-        ;;
-      pgcc-9.*)
-        PROD_CFLAGS=
-        ;;
-      *)
-        PROD_CFLAGS="-fast"
-        ;;
-    esac
+    ##############
+    # Production #
+    ##############
 
-    # Debug
     # NDEBUG is handled explicitly by the configure script
+    PROD_CFLAGS="-fast"
+
+    #########
+    # Debug #
+    #########
+
+    # NDEBUG is handled explicitly by the configure script
+    # -g is handled by the symbols flags
     DEBUG_CFLAGS="-Mbounds"
 
-    # Symbols
+    ###########
+    # Symbols #
+    ###########
+
     SYMBOLS_CFLAGS="-g"
     NO_SYMBOLS_CFLAGS="-s"
 
-    # Profiling
+    #############
+    # Profiling #
+    #############
+
     PROFILE_CFLAGS="-Mprof=func,line"
     # Use this for profiling with gprof
     #PROFILE_CFLAGS="-pg"
 
-    # Optimization
-    case "$cc_vendor-$cc_version" in
-      # Tweak down compiler optimizations for v10.6, it has a bug
-      pgcc-10.6*)
-        HIGH_OPT_CFLAGS="-O1"
-        ;;
-      # Tweak down compiler optimizations for v9.x
-      pgcc-9.*)
-        HIGH_OPT_CFLAGS="-O1"
-        ;;
-      *)
-        HIGH_OPT_CFLAGS=
-        ;;
-    esac
-    DEBUG_OPT_CFLAGS=
-    NO_OPT_CFLAGS=
+    ################
+    # Optimization #
+    ################
+
+    HIGH_OPT_CFLAGS="-O4"
+    DEBUG_OPT_CFLAGS="-gopt -O2"
+    NO_OPT_CFLAGS="-O0"
 
     # Flags are set
     cc_flags_set=yes

release_docs/RELEASE.txt

@@ -49,6 +49,24 @@ New Features
 
     Configuration:
     -------------
+    - Adds C++ Autotools configuration file for PGI
+
+      * Checks for pgc++ as the compiler name (was: pgCC)
+      * Sets -std=c++11
+      * Other options basically match new C options (below)
+
+      (DER - 2021/06/02)
+
+    - Updates PGI C options
+
+      * -Minform set to warn (was: inform) to suppress spurious messages
+      * Sets -gopt -O2 as debug options
+      * Sets -O4 as 'high optimization' option
+      * Sets -O0 as 'no optimization' option
+      * Removes specific settings for PGI 9 and 10
+
+      (DER - 2021/06/02)
+
     - A C++11-compliant compiler is now required to build the C++ wrappers
 
       CMAKE_CXX_STANDARD is now set to 11 when building with CMake and 
@@ -56,7 +74,6 @@ New Features
 
       (DER - 2021/05/27)
 
-
     - CMake will now run the shell script tests in test/ by default
 
       The test directory includes several shell script tests that previously