[test-suite] Add GCC C Torture Suite

Summary:
This patch adds support for testing clang/LLVM against the GCC Torture
suite.

This patch adds the CMake configuration and licence information for these tests. A follow-up patch will add the testcases themselves (which are too large to review, and included without modifications). They will be committed together.

Reviewers: hfinkel, kristof.beyls, asb

Reviewed By: kristof.beyls

Subscribers: khcheang, mehdi_amini, jvesely, krytarowski, fedor.sergeev, zzheng, steven_wu, dexonsmith, arphaman, jfb, mstorsjo, lewis-revill, simoncook, s.egerton, riccibruno, asb, mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D66887

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@374155 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 17 insertions, 0 deletions

diff --git a/SingleSource/Regression/C/gcc-c-torture/README b/SingleSource/Regression/C/gcc-c-torture/README
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+# GCC C Torture Suite
+
+This directory contains a checkout of
+svn://gcc.gnu.org/svn/gcc/trunk/gcc/testsuite/gcc.c-torture/execute .
+
+Last checked at SVN version 275024
+
+CMake Build configuration added by the LLVM project. The tests in
+`execute/builtins` are not run, and each CMakeLists.txt contains a list of tests
+to skip. These are both general and architecture-specific.
+
+There are not Makefiles for this part of the test suite.
+
+# Platform-specific concerns:
+
+RISC-V: The list of tests to exclude on RISC-V was devised using glibc and qemu.
+You may have to exclude additional tests when running with newlib and/or spike.