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|
# -*- 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
# Clang compiler or a derivative. It is careful not to do anything
# if the compiler is not Clang; otherwise 'cc_flags_set' is set to 'yes'
#
#
# For now, do not promote any warnings to errors.
#
WARNINGS_AS_ERRORS_DFLT=no
#
# This filter rewrites -Werror= as -W, in that way demoting warnings
# promoted to errors back to warnings, if WARNINGS_AS_ERRORS is no.
#
demote_errors()
{
if [ ${WARNINGS_AS_ERRORS:-${WARNINGS_AS_ERRORS_DFLT}} = no ]; then
sed 's,-Werror=,-W,g'
else
cat
fi
}
#
# Prepend `$srcdir/config/clang-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_clang_arguments()
{
set -- $(for arg; do
sed 's,#.*$,,' $srcdir/config/clang-warnings/${arg} | demote_errors
done)
IFS=' ' echo "$*"
}
# Get the compiler version in a way that works for clang
# unless a compiler version is already known
#
# cc_vendor: The compiler name: clang
# cc_version: Version number: 6.0.0, 7.3.0, ... 10.0.1
#
if test "X-" = "X-$cc_flags_set"; then
# clang -v will return version number following "clang" on Linux machines,
# but on Xcode the version number will follow "Apple LLVM version"
# Note that the Xcode reported LLVM version doesn't match the canonical
# LLVM version, so you'll need to do different version checks for
# Xcode.
cc_version="`$CC $CFLAGS $H5_CFLAGS -v 2>&1 |\
grep 'clang version' | sed 's/.*clang version \([-a-z0-9\.]*\).*/\1/'`"
if test -n "$cc_version"; then
cc_vendor="clang"
else
cc_version="`$CC $CFLAGS $H5_CFLAGS -v 2>&1 |\
grep 'Apple LLVM version' | sed 's/.*Apple LLVM version \([-a-z0-9\.]*\).*/\1/'`"
if test -n "$cc_version"; then
cc_vendor="Apple LLVM"
fi
fi
if test "X-" != "X-$cc_version"; then
# 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
fi
if test "X-clang" = "X-$cc_vendor" -o "X-Apple LLVM" = "X-$cc_vendor"; then
echo "compiler '$CC' is $cc_vendor-$cc_version"
###############################
# 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 $arch"
##############
# Production #
##############
# NDEBUG is handled explicitly by the configure script
PROD_CFLAGS=
#########
# Debug #
#########
# NDEBUG is handled explicitly by the configure script
# -g is handled by the symbols flags
DEBUG_CFLAGS="-ftrapv -fno-common"
###########
# Symbols #
###########
NO_SYMBOLS_CFLAGS=
SYMBOLS_CFLAGS="-g"
#############
# Profiling #
#############
PROFILE_CFLAGS="-pg"
################
# Optimization #
################
HIGH_OPT_CFLAGS="-O3"
NO_OPT_CFLAGS="-O0"
# -Og is only understood by clang 4+ and Xcode 9+
# Otherwise use -O1 (which is what -Og usually equates to)
if test "X-clang" = "X-$cc_vendor" -a $cc_vers_major -ge 4 -o "X-Apple LLVM" = "X-$cc_vendor" -a $cc_vers_major -ge 9; then
DEBUG_OPT_CFLAGS="-Og"
else
DEBUG_OPT_CFLAGS="-O1"
fi
############
# Warnings #
############
###########
# General #
###########
H5_CFLAGS="$H5_CFLAGS $(load_clang_arguments general)"
H5_ECFLAGS="$H5_ECFLAGS $(load_clang_arguments error-general)"
######################
# Developer warnings #
######################
NO_DEVELOPER_WARNING_CFLAGS=$(load_clang_arguments no-developer-general)
DEVELOPER_WARNING_CFLAGS=$(load_clang_arguments developer-general)
#############################
# Version-specific warnings #
#############################
#################
# Flags are set #
#################
cc_flags_set=yes
fi
# Clear cc info if no flags set
if test "X$cc_flags_set" = "X"; then
cc_vendor=
cc_version=
fi
|
