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hdf5/config/gnu-flags
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 gcc compiler or a derivative. It is careful not to do anything
# if the compiler is not GNU; otherwise 'cc_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 "$*"
}
# Get the compiler version in a way that works for gcc
# unless a compiler version is already known
#
# cc_vendor: The compiler name: gcc
# cc_version: Version number: 2.91.60, 2.7.2.1
#
if test "X-" = "X-$cc_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_CFLAGS to be erroneously added. The line
# "grep -v 'icc version'" causes the discarding of any output
# containing 'icc version'. The cc_version for icc is correctly determined
# and flags added in the intel-flags script.
cc_version="`$CC $CFLAGS $H5_CFLAGS -v 2>&1 | grep -v 'PathScale' |\
grep -v '^icc.*version' |\
grep 'gcc version' | sed 's/.*gcc version \([-a-z0-9\.]*\).*/\1/'`"
cc_vendor=`echo $cc_version |sed 's/\([a-z]*\).*/\1/'`
cc_version=`echo $cc_version |sed 's/[-a-z]//g'`
if test X = "X$cc_vendor" -a X != "X$cc_version"; then
cc_vendor=gcc
fi
if test "-" != "$cc_vendor-$cc_version"; then
echo "compiler '$CC' is GNU $cc_vendor-$cc_version"
fi
# Get the compiler version numbers
cc_vers_major=`echo $cc_version | cut -f1 -d.`
cc_vers_minor=`echo $cc_version | cut -f2 -d.`
cc_vers_patch=`echo $cc_version | cut -f3 -d.`
test -n "$cc_vers_major" || cc_vers_major=0
test -n "$cc_vers_minor" || cc_vers_minor=0
test -n "$cc_vers_patch" || cc_vers_patch=0
fi
if test "X-gcc" = "X-$cc_vendor"; then
###############################
# Architecture-specific flags #
###############################
arch=
case "$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
case "$host_os-$host_cpu" in
# cygwin needs the "-std=c99" flag removed, so make
# a specific case for Cygwin without the flag and a default
# case to add the flag everywhere else
cygwin-*)
;;
*)
H5_CFLAGS="$H5_CFLAGS -std=c99"
;;
esac
H5_CFLAGS="$H5_CFLAGS $arch"
##############
# Production #
##############
# NDEBUG is handled explicitly by the configure script
if test $cc_vers_major -le 4; then
PROD_CFLAGS=
else
PROD_CFLAGS="-fstdarg-opt"
fi
#########
# Debug #
#########
# NDEBUG is handled explicitly by the configure script
# -g is handled by the symbols flags
if test $cc_vers_major -le 4; then
DEBUG_CFLAGS=
else
DEBUG_CFLAGS="-ftrapv -fno-common"
fi
###########
# Symbols #
###########
NO_SYMBOLS_CFLAGS="-s"
SYMBOLS_CFLAGS="-g -fno-omit-frame-pointer"
#############
# Profiling #
#############
PROFILE_CFLAGS="-pg"
################
# Optimization #
################
if test $cc_vers_major -le 4; then
HIGH_OPT_CFLAGS="-O3"
DEBUG_OPT_CFLAGS=
else
HIGH_OPT_CFLAGS="-O3"
DEBUG_OPT_CFLAGS="-Og"
fi
NO_OPT_CFLAGS="-O0"
############
# Warnings #
############
###########
# General #
###########
# Add various general warning flags in gnu-warnings for gcc versions 4.8 and later.
if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 8 -o $cc_vers_major -gt 4; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments general)"
H5_ECFLAGS="$H5_ECFLAGS $(load_gnu_arguments error-general)"
######################
# Developer warnings #
######################
NO_DEVELOPER_WARNING_CFLAGS=$(load_gnu_arguments no-developer-general)
DEVELOPER_WARNING_CFLAGS=$(load_gnu_arguments developer-general)
fi
#######################
# gcc 4 special cases #
#######################
# GCC 4.8 through the end of GCC 4 series
if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 8; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 4.8-4.last)"
fi
#############################
# Version-specific warnings #
#############################
# gcc >= 4.8
if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 8; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 4.8)"
DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments developer-4.8)"
NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments no-developer-4.8)"
fi
# gcc >= 4.9
if test $cc_vers_major -ge 5 -o $cc_vers_major -eq 4 -a $cc_vers_minor -ge 9; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 4.9)"
fi
# gcc >= 5
if test $cc_vers_major -ge 5; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 5)"
H5_ECFLAGS="$H5_ECFLAGS $(load_gnu_arguments error-5)"
fi
# gcc >= 6
if test $cc_vers_major -ge 6; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 6)"
fi
# gcc >= 7
if test $cc_vers_major -ge 7; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 7)"
DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments developer-7)"
fi
# gcc 8
if test $cc_vers_major -ge 8; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 8)"
H5_ECFLAGS="$H5_ECFLAGS $(load_gnu_arguments error-8)"
DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments developer-8)"
NO_DEVELOPER_WARNING_CFLAGS="$NO_DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments no-developer-8)"
fi
# gcc 9
if test $cc_vers_major -ge 9; then
H5_CFLAGS="$H5_CFLAGS $(load_gnu_arguments 9)"
fi
#################
# Flags are set #
#################
cc_flags_set=yes
fi
# Clear cc info if no flags set
if test "X$cc_flags_set" = "X"; then
cc_vendor=
cc_version=
fi
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