OK, how about this? This patch makes everything uniform (see test cases below for an illustration of behaviour):
diff --git a/config.sub b/config.sub
index 072700f..c95acc6 100755
--- a/config.sub
+++ b/config.sub
@@ -625,7 +625,7 @@ case $basic_machine in
| powerpc | powerpc64 | powerpc64le | powerpcle \
| pru \
| pyramid \
- | riscv32 | riscv64 \
+ | riscv | riscv32 | riscv64 \
| rl78 | rx \
| score \
| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb |
shbe | shle | sh[1234]le | sh3ele \
@@ -752,7 +752,7 @@ case $basic_machine in
| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
| pru-* \
| pyramid-* \
- | riscv32-* | riscv64-* \
+ | riscv-* | riscv32-* | riscv64-* \
| rl78-* | romp-* | rs6000-* | rx-* \
| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-*
| sheb-* | shbe-* \
| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
@@ -1125,12 +1125,6 @@ case $basic_machine in
ps2)
basic_machine=i386-ibm
;;
- riscv)
- basic_machine=riscv32-unknown
- ;;
- riscv-*)
- basic_machine=`echo "$basic_machine" | sed 's/^riscv/riscv32/'`
- ;;
rm[46]00)
basic_machine=mips-siemens
;;
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index 7ad1f76..5ab1807 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -422,11 +422,11 @@ riscv64-elf
riscv64-unknown-elf
riscv64-hcos riscv64-unknown-hcos
riscv64-linux riscv64-unknown-linux-gnu
riscv64 riscv64-unknown-none
-riscv-company-elf riscv32-company-elf
-riscv-company-hcos riscv32-company-hcos
-riscv-elf riscv32-unknown-elf
-riscv-linux riscv32-unknown-linux-gnu
-riscv riscv32-unknown-none
+riscv-company-elf riscv-company-elf
+riscv-company-hcos riscv-company-hcos
+riscv-elf riscv-unknown-elf
+riscv-linux riscv-unknown-linux-gnu
+riscv riscv-unknown-none
rl78-linux rl78-unknown-linux-gnu
rl78 rl78-unknown-none
rx-linux rx-unknown-linux-gnu
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