[all-commits] [llvm/llvm-project] de61aa: [RISCV] Improve sysroot computation if no GCC inst...

[edward-jones via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: de61aa3118b9bac85c468ea7ec40604a086744f5
      https://github.com/llvm/llvm-project/commit/de61aa3118b9bac85c468ea7ec40604a086744f5
  Author: Edward Jones <ed.jones at embecosm.com>
  Date:   2019-11-07 (Thu, 07 Nov 2019)

  Changed paths:
    M clang/lib/Driver/ToolChains/RISCVToolchain.cpp
    A clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/bin/riscv32-unknown-elf-ld
    A clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf/lib/crt0.o
    A clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf/lib/crtbegin.o
    A clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf/lib/crtend.o
    A clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/bin/riscv64-unknown-elf-ld
    A clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf/lib/crt0.o
    A clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf/lib/crtbegin.o
    A clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf/lib/crtend.o
    A clang/test/Driver/riscv32-toolchain-extra.c
    A clang/test/Driver/riscv64-toolchain-extra.c

  Log Message:
  -----------
  [RISCV] Improve sysroot computation if no GCC install detected

If a GCC installed is not detected, the driver would default to
the root of the filesystem. This is not ideal when this doesn't
match the install directory of the toolchain and can cause
undesireable behavior such as picking up system libraries or
the system linker when cross-compiling.

Differential Revision: https://reviews.llvm.org/D68391