# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/gcc/parse-config
# Copyright (C) 2004 - 2024 The T2 SDE Project
# Copyright (C) 1998 - 2003 ROCK Linux Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2.
# --- T2-COPYRIGHT-NOTE-END ---

# Use the stack protector patch, if not disabled for the pkg
#
if [ "$SDECFG_SSP" = 1 ]; then
    if ! hasflag NO-SSP; then
	var_append GCC_WRAPPER_INSERT ' ' '-fstack-protector-strong'
    else
	echo_warning 'Stack-Smashing Protector disabled for this package'
    fi
fi

[ "$SDECFG_AUTO_VAR_INIT" = 1 ] && case $pkg in
    gcc) : ;;	# TODO: fine grained and bootloaders, too?
    *)
	var_append GCC_WRAPPER_INSERT ' ' '-ftrivial-auto-var-init=zero' ;;
esac

# It's usually better to not change the kernel optimization too drastically.
#
atstage toolchain &&
	export KCC="$CC" ||
	export KCC="${archprefix}kcc"
var_insert KCC_WRAPPER_REMOVE " " "-O -O[0-9sgz]"

# set CC, CXX and F77 environment variables
#
for x in CC CXX F77 ; do
	eval "y=\$SDECFG_DEFAULT_$x"
	if [[ $y = gcc* || $pkg = glibc* || $pkg = gcc || $pkg = memtest86 || $pkg = grub2 ]]; then
		case "$x-$stagelevel" in
		    CC-*)
			z="${archprefix}gcc ${archprefix}gcc" ;;
		    CXX*)
			z="${archprefix}g++ ${archprefix}g++" ;;
		    F77*)
			z="${archprefix}g77 ${archprefix}gfortran" ;;
		    *)
			export $x=${x}_not_available_in_stage_${stagelevel}
			continue ;;
		esac
		for y in $z ; do
			[ "`type -p $y`" ] && export $x=$y
		done
	fi
done

# Add the usual gcc optimazation options
# Strip or add debug information
#
debug_flags='-g -ggdb -g[0-9] -gdwarf*'

if [ "$SDECFG_DEBUG" = 0 ]; then
	var_append GCC_WRAPPER_APPEND " " "-c?:-s"
	var_insert GCC_WRAPPER_REMOVE " " "$debug_flags"
	var_append SYSGCC_WRAPPER_APPEND " " "-c?:-s"
	var_insert SYSGCC_WRAPPER_REMOVE " " "$debug_flags"
else
	var_append GCC_WRAPPER_APPEND " " "-ggdb"
	var_insert GCC_WRAPPER_REMOVE " " "-s $debug_flags"
	var_append SYSGCC_WRAPPER_APPEND " " "-ggdb"
	var_insert SYSGCC_WRAPPER_REMOVE " " "-s $debug_flags"
fi

# Remove the optimization options, since we pass generic ones ... In ROCK
# history this has been -m*, but this caused -msse and -maltivec style options
# to get removed. So we better only remove a known set of -m options ...
var_insert GCC_WRAPPER_REMOVE " " "-O -O[0-9sgz] -mtune* -march* -mcpu* -Werror -Wextra"
var_insert KCC_WRAPPER_REMOVE " " "-Werror"
var_insert SYSGCC_WRAPPER_REMOVE " " "-O -O[0-9sgz] -mtune* -march* -mcpu* -Werror"

# Disable some new compiler warnings to avoid patching thousands of packages.
case $pkg in
   gcc)
	# libstdc++ breaks w/ -Wno-error?
	: ;;
   *)
	var_append GCC_WRAPPER_INSERT ' ' "-Wno-error=implicit-int -Wno-error=incompatible-pointer-types"
	var_append GCC_WRAPPER_INSERT ' ' "-Wno-error=implicit-function-declaration"
	;;
esac

case "$SDECFG_OPT" in
	smart*)
		f="$confdir/$pkg.prof"
		# hack mostly for glibc32, could be made more generic
		[ -f "$f" ] || f="$confdir/../${pkg%%[0-9]*}/${pkg%%[0-9]*}.prof"
		# TODO: or fix awk script for non existing file?
		[ -f "$f" ] || f="/dev/null"

		basek="-Os"
		[ "$arch_sizeof_char_p" = 4 ] && basec="-Os" || basec="-O1"
		[ "$arch_sizeof_char_p" = 4 ] && basecxx="-O1" || basecxx="-O2"
		opt="-O2"
		[ "$SDECFG_OPT" = "smartly" ] && basecxx="$basec"
		[ "$SDECFG_OPT" = "smarter" ] && opt="-O3"
		kopt="$opt"
		[ "$SDECFG_OPT" = "smartest" ] && opt="-Ofast" && kopt="-O3"

		var_insert CC_WRAPPER_INSERT " " "$basec"
		var_insert CXX_WRAPPER_INSERT " " "$basecxx"
		var_insert GCC_WRAPPER_INSERT " " "-HOT$opt"
		var_insert GCC_WRAPPER_FILTER "|" "gawk -f $base/misc/tools-source/smart_wrapper.awk $f -"
		var_insert KCC_WRAPPER_INSERT " " "$basek -HOT$kopt"
		var_insert KCC_WRAPPER_FILTER "|" "gawk -f $base/misc/tools-source/smart_wrapper.awk $f -"
		var_insert SYSCC_WRAPPER_INSERT " " "$basec"
		var_insert SYSCXX_WRAPPER_INSERT " " "$basecxx"
		var_insert SYSGCC_WRAPPER_INSERT " " "-HOT$opt"
		var_insert SYSGCC_WRAPPER_FILTER "|" "gawk -f $base/misc/tools-source/smart_wrapper.awk $f -"
		unset basec basecxx basek opt kopt
		;;
	speed)
		var_insert GCC_WRAPPER_INSERT " " "-O2"
		var_insert KCC_WRAPPER_INSERT " " "-O2"
		var_insert SYSGCC_WRAPPER_INSERT " " "-O2"
		;;
	fast)
		var_insert GCC_WRAPPER_INSERT " " "-O3"
		var_insert KCC_WRAPPER_INSERT " " "-O3"
		var_insert SYSGCC_WRAPPER_INSERT " " "-O3"
		;;
	faster)
		var_insert GCC_WRAPPER_INSERT " " "-Ofast"
		var_insert KCC_WRAPPER_INSERT " " "-Ofast"
		var_insert SYSGCC_WRAPPER_INSERT " " "-Ofast"
		;;
	size)
		var_insert GCC_WRAPPER_INSERT " " "-Os"
		var_insert KCC_WRAPPER_INSERT " " "-Os"
		var_insert SYSGCC_WRAPPER_INSERT " " "-Os"
		;;
	lazy)
		var_insert GCC_WRAPPER_INSERT " " "-O1"
		var_insert KCC_WRAPPER_INSERT " " "-O1"
		var_insert SYSGCC_WRAPPER_INSERT " " "-O1"
		;;
	debug)
		var_insert GCC_WRAPPER_INSERT " " "-Og"
		var_insert KCC_WRAPPER_INSERT " " "-Og"
		var_insert SYSGCC_WRAPPER_INSERT " " "-Og"
		;;
	none)
		var_insert GCC_WRAPPER_INSERT " " "-O0"
		var_insert KCC_WRAPPER_INSERT " " "-O0"
		var_insert SYSGCC_WRAPPER_INSERT " " "-O0"
		;;
esac

# Add the architecture gcc optimisation options
#
if [ -f architecture/$arch/gcc-options.in ]; then
	. architecture/$arch/gcc-options.in
fi

# gcc-4.1.0 hangs with -v --help -pipe, thus we do not add it in that case
var_insert GCC_WRAPPER_INSERT ' ' '--help?:-pipe'
var_insert SYSGCC_WRAPPER_INSERT ' ' '--help?:-pipe'

[ "$SDECFG_LD_AS_NEEDED" != 0 ] &&
	var_append GCC_WRAPPER_INSERT " " "-c?:-Wl,--as-needed"


if hasflag NO-PIE; then
	[ "$SDECFG_PIE" == 1 ] &&
		echo_warning 'Position-Independent Executables disabled for this package'
elif [ "$SDECFG_PIE" == 1 ]; then
	case $SDECFG_STATIC in
		0) var_append GCC_WRAPPER_INSERT " " "-fPIE -c?:-pie"
		   var_append GCC_WRAPPER_APPEND " " "-fPIC" ;;
		1) var_append GCC_WRAPPER_INSERT " " "-fPIE -c?:-static-pie" ;;
	esac
fi

var_append GCC_WRAPPER_APPEND " " "$SDECFG_C_FLAGS"
var_append KCC_WRAPPER_APPEND " " "$SDECFG_C_FLAGS"

# Compile (i.e. link) all bins statically
#
if [ "$SDECFG_STATIC" = 1 ]; then
	var_insert GCC_WRAPPER_INSERT " " "-static"
fi

# Compile with no exceptions or rtti, gcc itself must support both
#
if [ "$SDECFG_LIMITCXX" = 1 ] && [[ $pkg != gcc* ]]; then
	var_append CXX_WRAPPER_APPEND " " "-fno-exceptions -fno-rtti"
fi

# Passing -I/usr{/local/}include creates a warning in gcc3 which is confusing
# some of the configure scripts and Makefiles.
#
var_insert GCC_WRAPPER_REMOVE " " "-I/usr/include -I/usr/local/include"

# pkg-config and other output or hardcoded configure assumption
# do not include the "DESTDIR" we need to adapt the pathes accordingly
function gcc_sysroot_filter() {
	# merge multiple path separators
	var_append GCC_WRAPPER_FILTER '|' "sed -e 's,//*,/,g'"

	# translate all non-$sysroot with trailing /lib and correct to $libdir
	var_append GCC_WRAPPER_FILTER '|' \
	"sed -e 's@^\(-[L]\|-Wl.*-rpath-link,\)*\(/\|/usr/\|/usr/[^/]*/\|/opt/[^/]*/\)\(lib\)\$@\1$root\2${libdir##*/}@'"

	# keep any other non-$sysdir /lib* as it
	var_append GCC_WRAPPER_FILTER '|' \
	"sed -e 's@^\(-[L]\|-Wl.*-rpath-link,\)*\(/\|/usr/\|/usr/[^/]*/\|/opt/[^/]*/\)\(lib\)@\1$root\2\3@'"

	# and tranlate includes, too, and yes, we need "lib" for for lib/glib/include/glibconfig.h
	var_append GCC_WRAPPER_FILTER '|' \
	"sed -e 's@^\(-[I]\)*\(/\|/usr/\|/usr/[^/]*/\|/opt/[^/]*/\)\(include\|lib\)@\1$root\2\3@'"
	var_append CPP_WRAPPER_FILTER '|' \
	"sed -e 's@^\(-[I]\)*\(/\|/usr/\|/usr/[^/]*/\|/opt/[^/]*/\)\(include\|lib\)@\1$root\2\3@'"
}
hook_add prepare 5 gcc_sysroot_filter

# Inject -fPIC if the package is marked to need a quirk ...
#
hasflag FPIC && var_append GCC_WRAPPER_APPEND ' ' '-fPIC'

# Build with LTO, if not disabled for this package
#
if [ "$SDECFG_LTO" != 1 ]; then
    var_append GCC_WRAPPER_REMOVE " " "-flto*"
else
    hasflag CUSTOM-LTO || var_append GCC_WRAPPER_REMOVE " " "-flto*"
    if hasflag NO-LTO; then
	echo_warning 'Link Time Optimization disabled for this package'
    elif ! hasflag CUSTOM-LTO; then
	if [ "$SDECFG_DEFAULT_CC" = clang ]; then
	    var_append GCC_WRAPPER_INSERT " " "conftest*.*?:-flto=thin"
	else
	    var_append GCC_WRAPPER_INSERT " " "conftest*.*?:-flto=${SDECFG_PARALLEL:-auto}"
	    var_append GCC_WRAPPER_INSERT " " "conftest*.*?:-shared?:-fwhole-program"
	    hasflag FAT-LTO && var_append GCC_WRAPPER_INSERT " " "-ffat-lto-objects"
	fi
    fi
fi

# -fcommon backward compatibility
hasflag FCOMMON && var_append GCC_WRAPPER_INSERT " " "-fcommon"

# usually 64-bit -latomic for some architectures
hasflag LATOMIC && [ $arch != avr32 ] && var_append GCC_WRAPPER_INSERT ' ' '-c?:-latomic -Wl,--as-needed'

# Remove -Wl,--as-needed, some packages break with it...
#
if hasflag NO-AS-NEEDED; then
	var_remove_regex GCC_WRAPPER_INSERT ' ' ".*-Wl,--as-needed"
	var_append GCC_WRAPPER_REMOVE ' ' "-Wl,--as-needed"
fi