# -*- 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