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Diffstat (limited to 'config/clang-flags')
| -rw-r--r-- | config/clang-flags | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/config/clang-flags b/config/clang-flags new file mode 100644 index 0000000..32c29d4 --- /dev/null +++ b/config/clang-flags @@ -0,0 +1,218 @@ +# -*- 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 +# 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. +# +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/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} + 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 Macs the version number will follow "Apple LLVM version" + 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/'`" + cc_vendor="Apple LLVM" + fi + if test "X-" != "X-$cc_version"; then + echo "compiler '$CC' is $cc_vendor-$cc_version" + + # 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 + 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" + + ############# + # 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="-g" + fi + NO_OPT_CFLAGS="-O0" + + ############ + # Warnings # + ############ + + ########### + # General # + ########### + + if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 2 -o $cc_vers_major -gt 4; then + H5_CFLAGS="$H5_CFLAGS $(load_clang_arguments general)" + fi +# if test $cc_vers_major -eq 4 -a $cc_vers_minor -ge 8 -o $cc_vers_major -gt 4; then +# H5_ECFLAGS="$H5_ECFLAGS $(load_clang_arguments error-general)" +# fi + +echo "H5_CFLAGS: $H5_CFLAGS" + + ###################### + # Developer warnings # + ###################### + + NO_DEVELOPER_WARNING_CFLAGS=$(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 + |