[gcc r13-3200] RISC-V: Add riscv_vector.h wrapper in testsuite to prevent pull in stdint.h from C library

[Kito Cheng]

https://gcc.gnu.org/g:d0bbecb1c418b680505faa998fe420f0fd4bbfc1

commit r13-3200-gd0bbecb1c418b680505faa998fe420f0fd4bbfc1
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Fri Oct 7 16:55:14 2022 +0800

    RISC-V: Add riscv_vector.h wrapper in testsuite to prevent pull in stdint.h from C library
    
    For RISC-V linux/glibc toolchain will got header file not found when including
    stdint.h if multilib is not enabled, it because some header file will
    try to include gnu/stubs-<ABI-NAME>.h from the system, however it only
    generated when multilib enabled.
    
    In order to prevent that, we introduce a wrapper for riscv_vector.h,
    include stdint-gcc.h rather than the default stdint.h.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/base/riscv_vector.h: New.
    
    Reported-by: Christoph Müllner <christoph.muellner@vrull.eu>
    Tested-by: Christoph Müllner <christoph.muellner@vrull.eu>
    Reviewed-by: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>

Diff:
---
 gcc/testsuite/gcc.target/riscv/rvv/base/riscv_vector.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/riscv_vector.h b/gcc/testsuite/gcc.target/riscv/rvv/base/riscv_vector.h
new file mode 100644
index 00000000000..fbb4858fc86
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/riscv_vector.h
@@ -0,0 +1,11 @@
+/* Wrapper of riscv_vector.h, prevent riscv_vector.h including stdint.h from
+   C library, that might cause problem on testing RV32 related testcase when
+   we disable multilib.  */
+#ifndef _RISCV_VECTOR_WRAP_H
+
+#define _GCC_WRAP_STDINT_H
+#include "stdint-gcc.h"
+#include_next <riscv_vector.h>
+#define _RISCV_VECTOR_WRAP_H
+
+#endif