[gcc r14-4950] RISC-V: Pass abi to g++ rvv testsuite

[Patrick O'Neill]

https://gcc.gnu.org/g:4d49685d671e4e604b2b873ada65aaac89348794

commit r14-4950-g4d49685d671e4e604b2b873ada65aaac89348794
Author: Patrick O'Neill <patrick@rivosinc.com>
Date:   Wed Oct 25 17:03:24 2023 -0700

    RISC-V: Pass abi to g++ rvv testsuite
    
    On rv32gcv testcases like g++.target/riscv/rvv/base/bug-22.C fail with:
    FAIL: g++.target/riscv/rvv/base/bug-22.C (test for excess errors)
    Excess errors:
    cc1plus: error: ABI requires '-march=rv32'
    
    This patch adds the -mabi argument to g++ rvv tests.
    
    gcc/testsuite/ChangeLog:
    
            * g++.target/riscv/rvv/rvv.exp: Add -mabi argument to CFLAGS.
    
    Signed-off-by: Patrick O'Neill <patrick@rivosinc.com>

Diff:
---
 gcc/testsuite/g++.target/riscv/rvv/rvv.exp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/g++.target/riscv/rvv/rvv.exp b/gcc/testsuite/g++.target/riscv/rvv/rvv.exp
index c30d6e93144c..5b01e4e05d2a 100644
--- a/gcc/testsuite/g++.target/riscv/rvv/rvv.exp
+++ b/gcc/testsuite/g++.target/riscv/rvv/rvv.exp
@@ -28,15 +28,17 @@ if ![istarget riscv*-*-*] then {
 load_lib g++-dg.exp
 
 set gcc_march "rv64gcv_zfh"
+set gcc_mabi  "lp64d"
 if [istarget riscv32-*-*] then {
   set gcc_march "rv32gcv_zfh"
+  set gcc_mabi  "ilp32d"
 }
 
 # Initialize `dg'.
 dg-init
 
 # Main loop.
-set CFLAGS "-march=$gcc_march -O3"
+set CFLAGS "-march=$gcc_march -mabi=$gcc_mabi -O3"
 dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/base/*.C]] \
 	"" $CFLAGS