[PING^6] nvptx: forward '-v' command-line option to assembler, linker

[Thomas Schwinge <thomas@codesourcery.com>]

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Hi Tom!

Ping.


Grüße
 Thomas


On 2022-07-27T17:48:46+0200, I wrote:
> Hi Tom!
>
> Ping.
>
>
> Grüße
>  Thomas
>
>
> On 2022-07-20T14:44:36+0200, I wrote:
>> Hi Tom!
>>
>> Ping.
>>
>>
>> Grüße
>>  Thomas
>>
>>
>> On 2022-07-13T10:41:23+0200, I wrote:
>>> Hi Tom!
>>>
>>> Ping.
>>>
>>>
>>> Grüße
>>>  Thomas
>>>
>>>
>>> On 2022-07-05T16:58:54+0200, I wrote:
>>>> Hi Tom!
>>>>
>>>> Ping.
>>>>
>>>>
>>>> Grüße
>>>>  Thomas
>>>>
>>>>
>>>> On 2022-06-07T17:41:16+0200, I wrote:
>>>>> Hi!
>>>>>
>>>>> On 2022-05-30T09:06:21+0200, Tobias Burnus <tobias@codesourcery.com> wrote:
>>>>>> On 29.05.22 22:49, Thomas Schwinge wrote:
>>>>>>> Not sure if that's what you had in mind, but what do you think about the
>>>>>>> attached "nvptx: forward '-v' command-line option to assembler, linker"?
>>>>>>> OK to push to GCC master branch (after merging
>>>>>>> <https://github.com/MentorEmbedded/nvptx-tools/pull/37>
>>>>>>> "Put '-v' verbose output onto stderr instead of stdout")?
>>>>>>
>>>>>> I was mainly thinking of some way to have it available — which
>>>>>> '-foffload-options=-Wa,-v' already permits on the GCC side. (Once the
>>>>>> nvptx-tools patch actually makes use of the '-v'.)
>>>>>
>>>>> (Merged a week ago.)
>>>>>
>>>>>> If I understand your patch correctly, this patch now causes 'gcc -v' to
>>>>>> imply 'gcc -v -Wa,-v'. I think that's okay, since 'gcc -v' already
>>>>>> outputs a lot of lines and those lines can be helpful to understand what
>>>>>> happens and what not.
>>>>>
>>>>> ACK.
>>>>>
>>>>>> Tom, your thoughts on this?
>>>>>
>>>>> Ping.
>>>>>
>>>>>
>>>>> Grüße
>>>>>  Thomas


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From 17c35607d4927299b0c4bd19dd6fd205c85c4a4b Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Sun, 29 May 2022 22:31:43 +0200
Subject: [PATCH] nvptx: forward '-v' command-line option to assembler, linker

For example, for offloading compilation with '-save-temps -v', before vs. after
word-diff then looks like:

    [...]
     [...]/build-gcc-offload-nvptx-none/gcc/as {+-v -v+} -o ./a.xnvptx-none.mkoffload.o ./a.xnvptx-none.mkoffload.s
    {+Verifying sm_30 code with sm_35 code generation.+}
    {+ ptxas -c -o /dev/null ./a.xnvptx-none.mkoffload.o --gpu-name sm_35 -O0+}
    [...]
     [...]/build-gcc-offload-nvptx-none/gcc/collect2 {+-v -v+} -o ./a.xnvptx-none.mkoffload [...] @./a.xnvptx-none.mkoffload.args.1 -lgomp -lgcc -lc -lgcc
    {+collect2 version 12.0.1 20220428 (experimental)+}
    {+[...]/build-gcc-offload-nvptx-none/gcc/collect-ld -v -v -o ./a.xnvptx-none.mkoffload [...] ./a.xnvptx-none.mkoffload.o -lgomp -lgcc -lc -lgcc+}
    {+Linking ./a.xnvptx-none.mkoffload.o as 0+}
    {+trying lib libc.a+}
    {+trying lib libgcc.a+}
    {+trying lib libgomp.a+}
    {+Resolving abort+}
    {+Resolving acc_on_device+}
    {+Linking libgomp.a::oacc-init.o/     as 1+}
    {+Linking libc.a::lib_a-abort.o/   as 2+}
    [...]

(This depends on <https://github.com/MentorEmbedded/nvptx-tools/pull/37>
"Put '-v' verbose output onto stderr instead of stdout".)

	gcc/
	* config/nvptx/nvptx.h (ASM_SPEC, LINK_SPEC): Define.
---
 gcc/config/nvptx/nvptx.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index ed72c253191..b184f1d0150 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -27,6 +27,13 @@
 
 /* Run-time Target.  */
 
+/* Assembler supports '-v' option; handle similar to
+   '../../gcc.cc:asm_options', 'HAVE_GNU_AS'.  */
+#define ASM_SPEC "%{v}"
+
+/* Linker supports '-v' option.  */
+#define LINK_SPEC "%{v}"
+
 #define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
 
 #define TARGET_CPU_CPP_BUILTINS() nvptx_cpu_cpp_builtins ()
-- 
2.25.1