[PATCH] D68407: [RISCV] Use compiler-rt if no GCC installation detected

[Edward Jones via Phabricator via cfe-commits]

edward-jones updated this revision to Diff 229284.
edward-jones retitled this revision from "[WIP][RISCV] Use compiler-rt if no GCC installation detected" to "[RISCV] Use compiler-rt if no GCC installation detected".
edward-jones added a comment.

Added tests that a user can specify a specific runtime library through `--rtlib`. Also rebased on master, and added a comment explaining the use of `--rtlib=platform` in the tests.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D68407/new/

https://reviews.llvm.org/D68407

Files:
  clang/lib/Driver/ToolChains/RISCVToolchain.cpp
  clang/lib/Driver/ToolChains/RISCVToolchain.h
  clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf/lib/crtbegin.o
  clang/test/Driver/Inputs/basic_riscv32_nogcc_tree/riscv32-unknown-elf/lib/crtend.o
  clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf/lib/crtbegin.o
  clang/test/Driver/Inputs/basic_riscv64_nogcc_tree/riscv64-unknown-elf/lib/crtend.o
  clang/test/Driver/riscv32-toolchain-extra.c
  clang/test/Driver/riscv32-toolchain.c
  clang/test/Driver/riscv64-toolchain-extra.c
  clang/test/Driver/riscv64-toolchain.c

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