[gentoo-dev] Ada eclass support for gcc_12.2.0

[Alfredo Tupone]

I would like to share the incoming changes to ada eclass to add support
to sys-devel/gcc-12.2.0 

One change is to not depend on gcc SLOT like for gnat the dependency in
on dev-lang/gnat-gpl SLOT, as gcc slot is 12 but the eclass need to
point to (eg.) gnatbind-12.2.0. Maybe in the future we could add
SUBSLOT to gcc.

So the dependency now is against gcc-12.2.0*

The other changes are trivial 

Alfredo

diff --git a/eclass/ada.eclass b/eclass/ada.eclass
index 0bf3dcfe41cc..e6027e38393b 100644
--- a/eclass/ada.eclass
+++ b/eclass/ada.eclass
@@ -46,58 +46,61 @@ EXPORT_FUNCTIONS pkg_setup
 # The dependency string is conditional on ADA_TARGET.
 #
 # Example use:
 # @CODE
 # RDEPEND="${ADA_DEPS}
 #   dev-foo/mydep"
 # DEPEND="${RDEPEND}"
 # @CODE
 #
 
 # @ECLASS_VARIABLE: _ADA_ALL_IMPLS
 # @INTERNAL
 # @DESCRIPTION:
 # All supported Ada implementations, most preferred last.
 _ADA_ALL_IMPLS=(
-	gnat_2020 gnat_2021
+	gnat_2020 gnat_2021 gcc_12_2_0
 )
 readonly _ADA_ALL_IMPLS
 
 
 # @FUNCTION: _ada_impl_supported
 # @USAGE: <impl>
 # @INTERNAL
 # @DESCRIPTION:
 # Check whether the implementation <impl> (ADA_COMPAT-form)
 # is still supported.
 #
 # Returns 0 if the implementation is valid and supported. If it is
 # unsupported, returns 1 -- and the caller should ignore the entry.
 # If it is invalid, dies with an appopriate error messages.
 _ada_impl_supported() {
 	debug-print-function ${FUNCNAME} "${@}"
 
 	[[ ${#} -eq 1 ]] || die "${FUNCNAME}: takes exactly 1 argument (impl)."
 
 	local impl=${1}
 
 	# keep in sync with _ADA_ALL_IMPLS!
 	# (not using that list because inline patterns shall be faster)
 	case "${impl}" in
 		gnat_202[01])
 			return 0
 			;;
+		gcc_12_2_0)
+			return 0
+			;;
 		*)
 			[[ ${ADA_COMPAT_NO_STRICT} ]] && return 1
 			die "Invalid implementation in ADA_COMPAT: ${impl}"
 	esac
 }
 
 # @FUNCTION: _ada_set_impls
 # @INTERNAL
 # @DESCRIPTION:
 # Check ADA_COMPAT for well-formedness and validity, then set
 # two global variables:
 #
 # - _ADA_SUPPORTED_IMPLS containing valid implementations supported
 #   by the ebuild (ADA_COMPAT - dead implementations),
 #
@@ -169,50 +172,58 @@ _ada_set_impls() {
 # the current one will be obtained from ${EADA}.
 #
 # The variables which can be exported are: GCC, EADA, GNATMAKE.
 # They are described more completely in the eclass
 # variable documentation.
 ada_export() {
 	debug-print-function ${FUNCNAME} "${@}"
 
 	local impl var
 
 	case "${1}" in
 		gnat_202[01])
 			impl=${1}
 			shift
 			;;
+		gcc_12_2_0)
+			impl=${1}
+			shift
+			;;
 		*)
 			impl=${EADA}
 			if [[ -z ${impl} ]]; then
 				die "ada_export called without a ada implementation and EADA is unset"
 			fi
 			;;
 	esac
 	debug-print "${FUNCNAME}: implementation: ${impl}"
 
 	local gcc_pv
 	local slot
 	case "${impl}" in
 		gnat_2020)
 			gcc_pv=9.3.1
 			slot=9.3.1
 			;;
 		gnat_2021)
 			gcc_pv=10.3.1
 			slot=10
 			;;
+		gcc_12_2_0)
+			gcc_pv=12.2.0
+			slot=12
+			;;
 		*)
 			gcc_pv="9.9.9"
 			slot=9.9.9
 			;;
 	esac
 
 	for var; do
 		case "${var}" in
 			EADA)
 				export EADA=${impl}
 				debug-print "${FUNCNAME}: EADA = ${EADA}"
 				;;
 			GCC)
 				export GCC=${EPREFIX}/usr/bin/gcc-${gcc_pv}
 				debug-print "${FUNCNAME}: GCC = ${GCC}"
@@ -234,31 +245,38 @@ ada_export() {
 				debug-print "${FUNCNAME}: GNATMAKE = ${GNATMAKE}"
 				;;
 			GNATLS)
 				export GNATLS=${EPREFIX}/usr/bin/gnatls-${gcc_pv}
 				debug-print "${FUNCNAME}: GNATLS = ${GNATLS}"
 				;;
 			GNATPREP)
 				export GNATPREP=${EPREFIX}/usr/bin/gnatprep-${gcc_pv}
 				debug-print "${FUNCNAME}: GNATPREP = ${GNATPREP}"
 				;;
 			GNATCHOP)
 				export GNATCHOP=${EPREFIX}/usr/bin/gnatchop-${gcc_pv}
 				debug-print "${FUNCNAME}: GNATCHOP = ${GNATCHOP}"
 				;;
 			ADA_PKG_DEP)
-				ADA_PKG_DEP="dev-lang/gnat-gpl:${slot}[ada]"
+				case "${impl}" in
+					gnat_202[01])
+						ADA_PKG_DEP="dev-lang/gnat-gpl:${slot}[ada]"
+						;;
+					*)
+						ADA_PKG_DEP="=sys-devel/gcc-${gcc_pv}*[ada]"
+						;;
+				esac
 
 				# use-dep
 				if [[ ${ADA_REQ_USE} ]]; then
 					ADA_PKG_DEP+=[${ADA_REQ_USE}]
 				fi
 
 				export ADA_PKG_DEP
 				debug-print "${FUNCNAME}: ADA_PKG_DEP = ${ADA_PKG_DEP}"
 				;;
 			*)
 				die "ada_export: unknown variable ${var}"
 		esac
 	done
 }