From 86b3a7532d56f74fcd1c362f2da7f95e8cc4e4a6 Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <tschwinge@baylibre.com>
Date: Fri, 27 Sep 2024 17:44:16 +0200
Subject: nvptx: Support '--with-multilib-list'

No change in behavior unless specifying it.

	gcc/
	* config.gcc: nvptx: Support '--with-multilib-list'.
	* config/nvptx/gen-multilib-matches.sh: Adjust.
	* configure.ac: Likewise.
	* configure: Regenerate.
	* doc/install.texi: Update.
	* doc/invoke.texi: Align.
	* config/nvptx/gen-multilib-matches-tests: Extend.
---
 gcc/config.gcc | 69 +++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 59 insertions(+), 10 deletions(-)

(limited to 'gcc/config.gcc')

diff --git a/gcc/config.gcc b/gcc/config.gcc
index f4ae14c..6381a57 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -5595,21 +5595,70 @@ case "${target}" in
 		;;
 	nvptx-*)
 		supported_defaults=arch
-		TM_MULTILIB_CONFIG=$with_arch
-		#TODO 'sm_[...]' list per 'nvptx-sm.def'.
-		case $with_arch in
-			sm_30 )
-				# OK; default.
+
+		nvptx_multilibs_default=sm_30
+
+		case "x${with_multilib_list}" in
+		x | xno)
+			nvptx_multilibs=
+			;;
+		xdefault | xyes)
+			nvptx_multilibs=default
+			;;
+		*)
+			nvptx_multilibs=$with_multilib_list
+			;;
+		esac
+		nvptx_multilibs=`echo $nvptx_multilibs | sed -e 's/,/ /g'`
+		# Expand 'default'.
+		nvptx_multilibs_expanded=
+		for nvptx_multilib in $nvptx_multilibs; do
+			case $nvptx_multilib in
+			default )
+				nvptx_multilibs_expanded="$nvptx_multilibs_expanded $nvptx_multilibs_default"
+				;;
+			* )
+				nvptx_multilibs_expanded="$nvptx_multilibs_expanded $nvptx_multilib"
 				;;
-			sm_35 | sm_53 | sm_70 | sm_75 | sm_80 )
-				# OK, but we'd like 'sm_30', too.
-				TM_MULTILIB_CONFIG="$TM_MULTILIB_CONFIG sm_30"
+			esac
+		done
+		# The '--with-arch=[...]' one comes first.
+		nvptx_multilibs=$with_arch$nvptx_multilibs_expanded
+		# Filter out any duplicates.
+		nvptx_multilibs_filtered=
+		for nvptx_multilib in $nvptx_multilibs; do
+			case " $nvptx_multilibs_filtered " in
+			*" $nvptx_multilib "* )
+				:
+				;;
+			* )
+				nvptx_multilibs_filtered="$nvptx_multilibs_filtered $nvptx_multilib"
+				;;
+			esac
+		done
+		nvptx_multilibs=$nvptx_multilibs_filtered
+		# Verify, and build 'TM_MULTILIB_CONFIG'.
+		TM_MULTILIB_CONFIG=
+		for nvptx_multilib in $nvptx_multilibs; do
+			case $nvptx_multilib in
+			#TODO 'sm_[...]' list per 'nvptx-sm.def'.
+			sm_30 | sm_35 \
+			| sm_53 \
+			| sm_70 | sm_75 \
+			| sm_80 )
+				TM_MULTILIB_CONFIG="$TM_MULTILIB_CONFIG $nvptx_multilib"
+				;;
+			$with_arch )
+				echo "Unknown arch used in --with-arch=$nvptx_multilib" 1>&2
+				exit 1
 				;;
 			* )
-				echo "Unknown arch used in --with-arch=$with_arch" 1>&2
+				echo "Unknown arch used in --with-multilib-list: $nvptx_multilib" 1>&2
 				exit 1
 				;;
-		esac
+			esac
+		done
+		TM_MULTILIB_CONFIG=`echo $TM_MULTILIB_CONFIG | sed 's/^ //'`
 		;;
 
 	powerpc*-*-* | rs6000-*-*)
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