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# -*- shell-script -*-
#
# This file is part of the HDF4 build script. It is processed shortly
# after configure starts and defines, among other things, flags for
# the various compilation modes.
#
# 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 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 -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 $H4_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"
CFLAGS="$CFLAGS -Wno-error=implicit-function-declaration"
CFLAGS="$CFLAGS -std=c99"
DEBUG_CFLAGS="-g -ftrapv -fno-common"
# -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 $cc_vers_major -ge 9; then
DEBUG_CFLAGS="$DEBUG_CFLAGS -Og"
else
DEBUG_CFLAGS="$DEBUG_CFLAGS -O1"
fi
DEBUG_CPPFLAGS=
PROD_CFLAGS="-O3"
PROD_CPPFLAGS=
PROFILE_CFLAGS="-pg"
PROFILE_CPPFLAGS=
###########
# General #
###########
CFLAGS="$CFLAGS $(load_clang_arguments general)"
CFLAGS="$CFLAGS $(load_clang_arguments no-developer-general)"
#################
# Flags are set #
#################
cc_flags_set=yes
fi
# Clear cc info if no flags set
if test "X$cc_flags_set" = "X"; then
cc_vendor=
cc_version=
fi
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