fix .gitignore: only ignore 'perl' in root of repo, not U/perl subdir

[metaconfig.git] / U / perl / Sysroot.U

?RCS: $Id$
?RCS:
?RCS: You may distribute under the terms of either the GNU General Public
?RCS: License or the Artistic License, as specified in the README file.
?RCS:
?MAKE:sysroot: Head
?MAKE:	-pick add $@ %<
?S:sysroot:
?S:	This variable is empty unless supplied by the Configure user.
?S:	It can contain a path to an alternative root directory, under which
?S:	headers and libraries for the compilation target can be found. This
?S:	is generally used when cross-compiling using a gcc-like compiler.
?S:.
?LINT:extern cc
?LINT:extern cppflags
?LINT:change cppflags
?LINT:extern ccflags
?LINT:change ccflags
?LINT:extern ldflags
?LINT:change ldflags
?LINT:extern cccdlflags
?X: _sysroot is later used in ccflags, but we do not want it in config.sh
?T:var xxx path _sysroot
: Set 'sysroot' to change the logical root directory to your headers and libraries see man gcc
: This is primarily meant for cross-compile environments, and may fail to be useful in other cases
if test "X$sysroot" = X; then
    sysroot=""
else
    case "$cc" in
	*gcc*|*g++*)
	    echo "Using $sysroot to find your headers and libraries, adding to ccflags"
	    # _sysroot is used in places where we need --sysroot=foo
	    # but using the rest of the flags could cause issues.
	    _sysroot="--sysroot=$sysroot";
	    case "$ccflags" in
		*sysroot*) ;;
		'undef'|*)
		ccflags="$ccflags $_sysroot"
	    esac
	    case "$ldflags" in
		*sysroot*) ;;
		'undef'|*)
		ldflags="$ldflags $_sysroot"
	    esac
	    case "$cppflags" in
		*sysroot*) ;;
		'undef'|*)
		cppflags="$cppflags $_sysroot"
	    esac
	    # lddlflags updated below in lddlflags section;
	    # same with cccdlflags
	    ;;
    esac

    # Adjust some defaults to also use $sysroot
    for var in xlibpth loclibpth locincpth glibpth; do
	eval xxx=\$$var
	eval $var=''
	for path in $xxx; do
	    eval $var=\"\$$var $sysroot$path\"
	done
    done

fi