# -*- 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://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 # 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. # 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/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} | demote_errors 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 compatibility" # 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 ######################## # Enhanced Diagnostics # ######################## if test $cxx_vers_major -ge 10; then NO_DIAGS_CXXFLAGS="-fdiagnostics-urls=never -fno-diagnostics-color" fi DIAGS_CXXFLAGS= ########### # 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 # ############ ########### # 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 $(load_gnu_arguments cxx-error-general)" ###################### # Developer warnings # ###################### # Use the C warnings as CXX warnings are the same NO_DEVELOPER_WARNING_CXXFLAGS=$(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 $cxx_vers_minor -ge 8; then # Use the C warnings as CXX warnings are the same H5_CXXFLAGS="$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 $(load_gnu_arguments cxx-4.8)" # Use the C warnings as CXX warnings are the same DEVELOPER_WARNING_CXXFLAGS="$DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments cxx-developer-4.8)" NO_DEVELOPER_WARNING_CXXFLAGS="$NO_DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments no-cxx-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 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 $cxx_vers_major -ge 6; then # Use the C warnings as CXX warnings are the same H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 6)" fi # gcc >= 7 if test $cxx_vers_major -ge 7; then # Use the C warnings as CXX warnings are the same H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 7)" DEVELOPER_WARNING_CXXFLAGS="$DEVELOPER_WARNING_CXXFLAGS $(load_gnu_arguments developer-7)" fi # gcc 8 if test $cxx_vers_major -ge 8; then # Use the C warnings as CXX warnings are the same H5_CXXFLAGS="$H5_CXXFLAGS $(load_gnu_arguments 8)" #H5_ECXXFLAGS="$H5_ECXXFLAGS $(load_gnu_arguments error-8)" # Use the C warnings as CXX warnings are the same DEVELOPER_WARNING_CXXFLAGS="$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 cxx-9)" fi # gcc >= 9.3 # no cxx warnings, do NOT use C warnings # gcc >= 10 if test $cxx_vers_major -ge 10; then # Use the C warnings as CXX warnings are the same DEVELOPER_WARNING_CFLAGS="$DEVELOPER_WARNING_CFLAGS $(load_gnu_arguments developer-10)" fi ################# # Flags are set # ################# cxx_flags_set=yes fi # Clear cxx info if no flags set if test "X$cxx_flags_set" = "X"; then cxx_vendor= cxx_version= fi