[PATCH] Add "riscv" as an alias for "riscv32"

[Palmer Dabbelt]

Most RISC-V toolchains can generate code for all RISC-V targets, but are
currently named "riscv32-*" and "riscv64-*". Users have suggested that
these names are unintuiative and would like tuples to be "riscv-*".

This patch enables "riscv-*" tuples by adding a config.sub rule that
replaces "riscv-*" with "riscv32-*". The first ISA described by the
RISC-V specification is RV32I, a 32-bit ISA, so making "riscv-*" mean
32-bit seems like the sane way to go. There are also handful of tests
added, which all pass for me.

This has been discussed on various mailing lists a half dozen times, but
I never got around to submitting a patch.

2018-06-11 Palmer Dabbelt <pal...@sifive.com>

* config.sub: Add "riscv-*" as an alias for "riscv32-*".
* testsuite/config-sub.data: Add tests for the "riscv-*" alias.

CC: Sebastian Huber <sebasti...@embedded-brains.de>
Signed-off-by: Palmer Dabbelt <pal...@sifive.com>
---
config.sub | 6 ++++++
testsuite/config-sub.data | 5 +++++
2 files changed, 11 insertions(+)

diff --git a/config.sub b/config.sub
index d1f5b5490349..32be6f6a56db 100755
--- a/config.sub
+++ b/config.sub
@@ -1125,6 +1125,12 @@ 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 8013ead85eb0..79241bdffec4 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -412,6 +412,11 @@ pyramid pyramid-unknown-none
rdos32 i386-pc-rdos
rdos64 x86_64-pc-rdos
rdos x86_64-pc-rdos
+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
riscv32-company-elf riscv32-company-elf
riscv32-company-hcos riscv32-company-hcos
riscv32-elf riscv32-unknown-elf
--
2.16.4