[RISCV] Explicitly set an empty --sysroot in the test

In rL341655 we added additional behaviour to the Driver for riscv32-unknown-elf
when the sysroot is empty.

The new tests that check the new behaviour expect that the absence of --sysroot
in the command-line implies that the sysroot empty. This doesn't hold if clang
is built with a non-empty DEFAULT_SYSROOT in cmake. When this is the case, this
test fails.

Since the new behaviour is triggered when the sysroot is empty, pass an empty
--sysroot to avoid using the default (if any).

Differential Revision: https://reviews.llvm.org/D51972

llvm-svn: 342060

diff --git a/clang/test/Driver/riscv32-toolchain.c b/clang/test/Driver/riscv32-toolchain.c
index b80753ea0dd2cbd4dfd8bd2835c52f5a4b8ad11d..9e8af3a8ff45c587f20eb39d47b7e3ef4e42b4e7 100644 (file)
--- a/clang/test/Driver/riscv32-toolchain.c
+++ b/clang/test/Driver/riscv32-toolchain.c
@@ -21,6 +21,7 @@
 
 // RUN: %clang %s -### -no-canonical-prefixes \
 // RUN:   -target riscv32-unknown-elf \
+// RUN:   --sysroot= \
 // RUN:   --gcc-toolchain=%S/Inputs/basic_riscv32_tree 2>&1 \
 // RUN:   | FileCheck -check-prefix=C-RV32-BAREMETAL-NOSYSROOT-ILP32 %s
 
@@ -52,6 +53,7 @@
 
 // RUN: %clangxx %s -### -no-canonical-prefixes \
 // RUN:   -target riscv32-unknown-elf -stdlib=libstdc++ \
+// RUN:   --sysroot= \
 // RUN:   --gcc-toolchain=%S/Inputs/basic_riscv32_tree 2>&1 \
 // RUN:   | FileCheck -check-prefix=CXX-RV32-BAREMETAL-NOSYSROOT-ILP32 %s