#!/bin/sh

REAL_RANLIB=binutils-ranlib
PARENT="$(readlink /proc/$PPID/exe)"
WRAPPED=false

# If /proc isn't mounted, let's do the least evil thing we can
if [ -z "$PARENT" ]; then
    WRAPPED=true
# If we're being called by gcc-ranlib or llvm-ranlib,
# we're already wrapped (and need to make sure we don't
# call ourselves recursively)
elif echo "$PARENT" |grep -qE -- '-ranlib$'; then
    WRAPPED=true
# Fun... We're running inside qemu binfmt_misc emulation,
# so we have to determine our parent the evil and less
# reliable way...
elif echo "$PARENT" |grep -qE -- 'qemu'; then
    if grep -qE -- '-ranlib' /proc/$PPID/cmdline; then
		WRAPPED=true
    fi
fi
# If we're being called by gcc-ranlib or llvm-ranlib, we're
# already wrapped
if ! "$WRAPPED"; then

	which llvm-ranlib &>/dev/null && IS_LLVM_RANLIB=true
	which gcc-ranlib &>/dev/null && IS_GCC_RANLIB=true
	which gcc-nm &>/dev/null && IS_GCC_NM=true
	[[ -z "$IS_GCC_NM" ]] && echo "${0}-wrapper ERROR: GCC-NM missing, cannot continue!" && exit 1

	for i in "$@"; do
		[ "$(echo $i |cut -b1)" = '-' ] && continue
		if echo "$i" |grep -qE '\.(o|a)$' && [ -e "$i" ]; then
	    	if LANG=C gcc-nm "$i" 2>&1 |grep -qi "file format not recognized"; then
				if [[ -n "$IS_LLVM_RANLIB" ]]; then
		    		REAL_RANLIB=llvm-ranlib
		    		break
				else
					echo "${0}-wrapper ERROR: LLVM-LTO code but missing llvm-ranlib, cannot continue!"
					exit 1
				fi
			fi
			if LANG=C readelf -s "$i" | grep -q "gnu_lto"; then
				if [[ -n "$IS_GCC_RANLIB" ]]; then
					REAL_RANLIB=gcc-ranlib
					break
				else
					echo "${0}-wrapper ERROR: GCC-LTO code but missing gcc-ranlib, cannot continue!"
					exit
				fi
			fi
		fi
    done

	# static LTO stuff sucks hell , force gcc-xxx
	if [ "$REAL_RANLIB" = 'binutils-ranlib' ]; then
		REAL_RANLIB=gcc-ranlib
	fi
fi
exec "$REAL_RANLIB" "$@"