[gcc r13-2872] nvptx: forward '-v' command-line option to assembler

[Thomas Schwinge <tschwinge@gcc.gnu.org>]

https://gcc.gnu.org/g:84072a2615ec1f5f35e994128a6dc22af5bf1322

commit r13-2872-g84072a2615ec1f5f35e994128a6dc22af5bf1322
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Sun May 29 22:31:43 2022 +0200

    nvptx: forward '-v' command-line option to assembler
    
    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+}
        [...]
    
    (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): Define.

Diff:
---
 gcc/config/nvptx/nvptx.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index dc9cad1aaaf..0b0170d77b3 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -27,6 +27,10 @@
 
 /* Run-time Target.  */
 
+/* Assembler supports '-v' option; handle similar to
+   '../../gcc.cc:asm_options', 'HAVE_GNU_AS'.  */
+#define ASM_SPEC "%{v}"
+
 #define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
 
 #define TARGET_CPU_CPP_BUILTINS() nvptx_cpu_cpp_builtins ()