app-portage/prefix-toolkit: new packageprefix-toolkit-0

* For any Gentoo Prefix, provides the 'startprefix' script, and should
provide some 'runprefix' script later on, as inspired in
Bug: https://bugs.gentoo.org/673816

* For base Gentoo Prefix (as in "not stacked"), provides the
'prefix-stack-setup' script, superseding app-portage/prefix-chain-setup,
does force the prefix-stack implit USE flag in the stacked Prefix.
* For stacked Gentoo Prefix (set up using 'prefix-stack-setup'),
provides the toolchain wrapper, superseding sys-apps/prefix-chain-utils.
Bug: https://bugs.gentoo.org/658572

Closes: https://bugs.gentoo.org/509142
Package-Manager: Portage-2.3.51, Repoman-2.3.11
Signed-off-by: Michael Haubenwallner <haubi@gentoo.org>

(cherry picked from commit 84b9f582e8c8db69a3b3677de702c7cc00ac3dab)

1 files changed, 94 insertions, 0 deletions

diff --git a/prefix-stack-ccwrap b/prefix-stack-ccwrap
new file mode 100644
index 0000000..93f7a82
--- /dev/null
+++ b/prefix-stack-ccwrap
@@ -0,0 +1,94 @@
+#!@GENTOO_PORTAGE_BPREFIX@/bin/bash
+
+if [ -r /cygdrive/. ]; then
+	winpath2unix() { cygpath -u "$1"; }
+	unixpath2win() { cygpath -w "$1"; }
+fi
+
+myself=${0##*/} # basename $0
+link_dirs=()
+opts=()
+chost="@GENTOO_PORTAGE_CHOST@"
+prefix="@GENTOO_PORTAGE_EPREFIX@"
+absprefix=${prefix}
+if [[ ${chost} == *"-winnt"* ]]; then
+	# we may get called from windows binary, like pkgdata in dev-libs/icu
+	# in this case, PATH elements get the "/dev/fs/C/WINDOWS/SUA" prefix
+	absprefix=$(winpath2unix "$(unixpath2win "${absprefix}")")
+fi
+[[ ${myself} == *windres* ]] && mode=compile || mode=link
+orig_args=("$@")
+
+for opt in "$@"
+do
+	case "$opt" in
+	-L)
+		link_dirs=("${link_dirs[@]}" "-L$1")
+		shift
+		;;
+	-L*)
+		link_dirs=("${link_dirs[@]}" "${opt}")
+		;;
+	*)
+		case "${opt}" in
+		-v)
+			# -v done right: only use mode version if -v is the _only_
+			# argument on the command line.
+			[[ ${#orig_args[@]} -gt 1 ]] || mode=version
+			;;
+		--version)	mode=version ;;
+		-c|-E|-S)	mode=compile ;;
+		-print-search-dirs) mode=dirs ;;
+		esac
+		opts=("${opts[@]}" "${opt}")
+		;;
+	esac
+done
+
+# remove any path to current prefix, need base prefix only
+new_path=
+save_ifs=$IFS
+IFS=':'
+for p in $PATH
+do
+	IFS=$save_ifs
+	[[ ${p#${absprefix}} != "${p}" ]] && continue
+	if [[ -z "${new_path}" ]]; then
+		new_path="${p}"
+	else
+		new_path="${new_path}:${p}"
+	fi
+done
+IFS=$save_ifs
+
+PATH=${new_path}
+
+# binutils-config's ldwrapper understands '-R' for aix and hpux too.
+# parity (winnt) understands -rpath only ...
+case "${chost}" in
+*-winnt*) rpath_opt="-Wl,-rpath," ;;
+*) rpath_opt="-Wl,-R," ;;
+esac
+
+pfx_link=("-L${prefix}/usr/lib" "-L${prefix}/lib")
+pfx_link_r=("${rpath_opt}${prefix}/lib" "${rpath_opt}${prefix}/usr/lib")
+pfx_comp=("-I${prefix}/include" "-I${prefix}/usr/include")
+
+# ensure we run the right chost program in base prefix
+[[ ${myself} == *-*-*-* ]] || myself=${chost}-${myself#${chost}-}
+
+case "$mode" in
+link)    exec "${myself}" "${link_dirs[@]}" "${pfx_link[@]}" "${opts[@]}" "${pfx_comp[@]}" "${pfx_link_r[@]}" ;;
+compile) exec "${myself}" "${link_dirs[@]}" "${opts[@]}" "${pfx_comp[@]}" ;;
+version) exec "${myself}" "${orig_args[@]}" ;;
+dirs)
+	"${myself}" "${orig_args[@]}" | while read line; do
+		if [[ "${line}" == "libraries: ="* ]]; then
+			echo "libraries: =${prefix}/usr/lib:${prefix}/lib:${line#"libraries: ="}"
+		else
+			echo "${line}"
+		fi
+	done
+	;;
+*)			echo "cannot infer ${myself}'s mode from comamnd line arguments"; exit 1 ;;
+esac