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hdf5/config/gnu-cxxflags
Larry Knox fcd87d2569 Revise gnu-*flags and cmake/HDF*CompilerFlags.cmake files to add warning 
flags for GCC compilers version 4.8 and above.
Removed files from gnu-warnings that only apply to versions < 4.8.
Consolidated warnings from versions < 4.8 that apply to versions >= 4.8
into the 4.8 warnings files.
2020-05-18 14:28:51 -05:00

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# -*- shell-script -*-
#
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# 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://support.hdfgroup.org/ftp/HDF5/releases.
# 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
# GNU g++ compiler or a derivative. It is careful not to do anything
# if the compiler is not GNU; otherwise `cxx_flags_set' is set to `yes'
#
#
# For now, do not promote any warnings to errors.
#
PROMOTE_ERRORS_DFLT=no
#
# This filter rewrites -Werror= as -W, in that way demoting warnings
# promoted to errors back to warnings, if PROMOTE_ERRORS is no.
#
demote_errors()
{
if [ ${PROMOTE_ERRORS:-${PROMOTE_ERRORS_DFLT}} = no ]; then
sed 's,-Werror=,-W,g'
else
cat
fi
}
#
# Prepend `$srcdir/config/gnu-warnings/` to the filename suffix(es) given as
# subroutine argument(s), remove comments starting with # and ending
# at EOL, replace spans of whitespace (including newlines) with spaces,
# and re-emit the file(s) thus filtered on the standard output stream.
#
load_gnu_arguments()
{
set -- $(for arg; do
sed 's,#.*$,,' $srcdir/config/gnu-warnings/${arg}
done)
IFS=' ' echo "$*"
}
# Get the compiler version in a way that works for g++
# unless a compiler version is already known
#
# cxx_vendor: The compiler name: g++
# cxx_version: Version number: 2.91.60, 2.7.2.1
#
if test "X-" = "X-$cxx_flags_set"; then
# PathScale compiler spits out gcc version string too. Need to
# filter it out.
# icc beginning with version 12 includes a "gcc version compatiblilty"
# string, causing the gcc H5_CXXFLAGS to be erroneously added. The line
# "grep -v 'icc version'" causes the discarding of any output
# containing 'icc version'. The cxx_version for icc is correctly determined
# and flags added in the intel-flags script.
cxx_version="`$CXX $CXXFLAGS $H5_CXXFLAGS -v 2>&1 | grep -v 'PathScale' |\
grep -v '^icc.*version' |\
grep 'gcc version' | sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
cxx_vendor=`echo $cxx_version |sed 's/\([a-z]*\).*/\1/'`
cxx_version=`echo $cxx_version |sed 's/[-a-z]//g'`
if test X = "X$cxx_vendor" -a X != "X$cxx_version"; then
cxx_vendor=g++
fi
if test "-" != "$cxx_vendor-$cxx_version"; then
echo "compiler '$CXX' is GNU $cxx_vendor-$cxx_version"
fi
# Get the compiler version numbers
cxx_vers_major=`echo $cxx_version | cut -f1 -d.`
cxx_vers_minor=`echo $cxx_version | cut -f2 -d.`
cxx_vers_patch=`echo $cxx_version | cut -f3 -d.`
test -n "$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 + $cxx_vers_patch`
fi
if test "X-g++" = "X-$cxx_vendor"; then
###############################
# Architecture-specific flags #
###############################
arch=
case "$host_os-$host_cpu" in
# FreeBSD sets the information from "uname -m" to the general machine
# architecture, not the specific CPU for the machine, so even our
# Pentium II Xeon server is set to "i386". Once we know we are on a FreeBSD
# machine, use the "sysctl" command to get the CPU hardware model.
freebsd*-i386)
host_cpu_model=`sysctl -n hw.model`
case "$host_cpu_model" in
# Hmm.. this might not catch Celerons, but it won't hurt them either...
*Pro*|*II*|*III*|*IV*|*Athlon*)
# architecture-specific optimizations cause problems
# for some users who build binaries to be used on
# multiple architectures.
# arch="-march=i686"
;;
esac
;;
*-i686)
# architecture-specific optimizations cause problems
# for some users who build binaries to be used on
# multiple architectures.
# arch="-march=i686"
;;
esac
# C++-specific
H5_CXXFLAGS="$H5_CXXFLAGS $arch"
##############
# Production #
##############
# NDEBUG is handled explicitly by the configure script
if test $cxx_vers_major -le 4; then
PROD_CXXFLAGS=
else
PROD_CXXFLAGS="-fstdarg-opt"
fi
#########
# Debug #
#########
# NDEBUG is handled explicitly by the configure script
# -g is handled by the symbols flags
if test $cxx_vers_major -le 4; then
DEBUG_CXXFLAGS=
else
DEBUG_CXXFLAGS="-ftrapv -fno-common"
fi
###########
# Symbols #
###########
NO_SYMBOLS_CXXFLAGS="-s"
SYMBOLS_CXXFLAGS="-g"
#############
# Profiling #
#############
PROFILE_CXXFLAGS="-pg"
################
# Optimization #
################
if test $cxx_vers_major -le 4; then
HIGH_OPT_CXXFLAGS="-O3"
DEBUG_OPT_CXXFLAGS=
else
HIGH_OPT_CXXFLAGS="-O3"
DEBUG_OPT_CXXFLAGS="-Og"
fi
NO_OPT_CXXFLAGS="-O0"
############
# Warnings #
############
# First load the C warnings then add CXX warnings (if needed)
###########
# General #
###########
# Add various general warning flags in gnu-warnings for gcc versions 4.8 and later.
if test $cxx_vers_major -eq 4 -a $cxx_vers_minor -ge 8 -o $cxx_vers_major -ge 5; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments cxx-general)"
H5_ECXXFLAGS="$H5_ECXXFLAGS $(load_gnu_arguments cxx-error-general)"
######################
# Developer warnings #
######################
NO_DEVELOPER_WARNING_CXXFLAGS=$(load_gnu_arguments no-developer-general)
DEVELOPER_WARNING_CXXFLAGS=$(load_gnu_arguments developer-general)
fi
#######################
# gcc 4 special cases #
#######################
# GCC 4.8 through the end of GCC 4 series
if test $cxx_vers_major -eq 4 -a $cxx_vers_minor -ge 8; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 4.8-4.last)"
fi
#############################
# Version-specific warnings #
#############################
# gcc >= 4.8
if test $cxx_vers_major -ge 5 -o $cxx_vers_major -eq 4 -a $cxx_vers_minor -ge 8; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 4.8)"
DEVELOPER_WARNING_CXXFLAGS="$DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments developer-4.8)"
NO_DEVELOPER_WARNING_CXXFLAGS="$NO_DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments no-developer-4.8)"
fi
# gcc >= 4.9
if test $cxx_vers_major -ge 5 -o $cxx_vers_major -eq 4 -a $cxx_vers_minor -ge 9; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 4.9)"
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments cxx-4.9)"
fi
# gcc >= 5
if test $cxx_vers_major -ge 5; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments cxx-5)"
H5_ECXXFLAGS="$H5_ECXXFLAGS $(load_gnu_arguments cxx-error-5)"
fi
# gcc >= 6
if test $cxx_vers_major -ge 6; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 6)"
fi
# gcc >= 7
if test $cxx_vers_major -ge 7; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 7)"
DEVELOPER_WARNING_CXXFLAGS="$DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments developer-7)"
fi
# gcc 8
if test $cxx_vers_major -ge 8; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 8)"
#H5_ECXXFLAGS="$H5_ECXXFLAGS $(load_gnu_arguments error-8)"
DEVELOPER_WARNING_CXXFLAGS="$DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments developer-8)"
NO_DEVELOPER_WARNING_CXXFLAGS="$NO_DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments no-developer-8)"
fi
# gcc 9
if test $cxx_vers_major -ge 9; then
H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 9)"
fi
#################
# Flags are set #
#################
cxx_flags_set=yes
fi
# Clear cxx info if no flags set
if test "X$cxx_flags_set" = "X"; then
cxx_vendor=
cxx_version=
fi
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