[gentoo-dev] [PATCH 1/4] cross.eclass: new eclass

[Alfred Persson Forsberg <cat@catcream.org>]

Signed-off-by: Alfred Persson Forsberg <cat@catcream.org>
---
 eclass/cross.eclass | 83 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 eclass/cross.eclass

diff --git a/eclass/cross.eclass b/eclass/cross.eclass
new file mode 100644
index 000000000000..a7a75aac8e43
--- /dev/null
+++ b/eclass/cross.eclass
@@ -0,0 +1,83 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: cross.eclass
+# @MAINTAINER:
+# cat@catcream.org
+# @AUTHOR:
+# Alfred Persson Forsberg <cat@catcream.org> (21 Jul 2023)
+# @SUPPORTED_EAPIS: 7 8
+# @BLURB: Convenience wrappers for packages used by the Crossdev tool.
+
+inherit toolchain-funcs
+
+case ${EAPI} in
+	7|8) ;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+if [[ -z ${_CROSS_ECLASS} ]]; then
+_CROSS_ECLASS=1
+
+# @ECLASS_VARIABLE: _CROSS_CATEGORY_PREFIX
+# @INTERNAL
+_CROSS_CATEGORY_PREFIX=""
+
+# @ECLASS_VARIABLE: _IS_CROSSPKG_LLVM
+# @INTERNAL
+_IS_CROSSPKG_LLVM=0
+if [[ ${CATEGORY} == cross_llvm-* ]] ; then
+	_IS_CROSSPKG_LLVM=1
+	_CROSS_CATEGORY_PREFIX="cross_llvm-"
+fi
+
+# @ECLASS_VARIABLE: _IS_CROSSPKG_GCC
+# @INTERNAL
+_IS_CROSSPKG_GCC=0
+if [[ ${CATEGORY} == cross-* ]] ; then
+	_IS_CROSSPKG_GCC=1
+	_CROSS_CATEGORY_PREFIX="cross-"
+fi
+
+# @ECLASS_VARIABLE: _IS_CROSSPKG
+# @INTERNAL
+[[ ${_IS_CROSSPKG_LLVM} == 1 || ${_IS_CROSSPKG_GCC} == 1 ]] && _IS_CROSSPKG=1
+
+# Default CBUILD and CTARGET to CHOST if unset.
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	# cross-aarch64-gentoo-linux-musl -> aarch64-gentoo-linux-musl
+	[[ ${_IS_CROSSPKG_GCC} == 1 ]] && export CTARGET=${CATEGORY#cross-}
+	[[ ${_IS_CROSSPKG_LLVM} == 1 ]] && export CTARGET=${CATEGORY#cross_llvm-}
+fi
+
+# @FUNCTION: is_crosscompile
+# @RETURN:
+# Shell true if we're targeting an architecture other than host
+is_crosscompile() {
+	 [[ ${CHOST} != ${CTARGET} ]]
+}
+
+# @FUNCTION: is_crosspkg
+# @RETURN:
+# Shell true if package belongs to any crossdev category
+is_crosspkg() {
+	 [[ ${_IS_CROSSPKG} == 1 ]]
+}
+
+# @FUNCTION: is_crosspkg_gcc
+# @RETURN:
+# Shell true if package belongs to GCC (standard) crossdev category
+is_crosspkg_gcc() {
+	[[ ${_IS_CROSSPKG_GCC} == 1 ]]
+}
+
+# @FUNCTION: is_crosspkg_llvm
+# @RETURN:
+# Shell true if package belongs to LLVM crossdev category.
+is_crosspkg_llvm() {
+	[[ ${_IS_CROSSPKG_LLVM} == 1 ]]
+}
+
+fi
-- 
2.41.0