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[PATCH 1/7] RISC-V: Top-Level Makefile for riscv{32,64}

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  [PATCH 1/7] RISC-V: Top-Level Makefile for riscv{32,64} Palmer Dabbelt <palmer@dabbelt.com> - 2017-05-23 02:50 +0200
    Re: [PATCH 1/7] RISC-V: Top-Level Makefile for riscv{32,64} Arnd Bergmann <arnd@arndb.de> - 2017-05-23 13:40 +0200

#1647519 — [PATCH 1/7] RISC-V: Top-Level Makefile for riscv{32,64}

RISC-V has both 32-bit and 64-bit base ISAs, but they are very similar.
Like some other platforms, we'd like to share one arch directory between
the two of them.
---
 Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index 63e10bd4f14a..0606f28cd4fd 100644
--- a/Makefile
+++ b/Makefile
@@ -269,6 +269,14 @@ ifeq ($(ARCH),x86_64)
         SRCARCH := x86
 endif
 
+# Additional ARCH settings for RISC-V
+ifeq ($(ARCH),riscv32)
+	SRCARCH := riscv
+endif
+ifeq ($(ARCH),riscv64)
+	SRCARCH := riscv
+endif
+
 # Additional ARCH settings for sparc
 ifeq ($(ARCH),sparc32)
        SRCARCH := sparc
-- 
2.13.0

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#1647957

On Tue, May 23, 2017 at 2:41 AM, Palmer Dabbelt <palmer@dabbelt.com> wrote:
> RISC-V has both 32-bit and 64-bit base ISAs, but they are very similar.
> Like some other platforms, we'd like to share one arch directory between
> the two of them.

I think we mainly do the others for backwards-compatibility with ancient
build scripts, and we don't need that here. Instead, you could add one more
line to the 'SUBARCH:=' statement that interprets the uname output.

        Arnd

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