[PATCH] D20662: [LibFuzzer] Emit error during configuration if LLVM_USE_SANITIZER is not correctly set.

[Dan Liew via llvm-commits]

delcypher created this revision.
delcypher added reviewers: kcc, aizatsky.
delcypher added subscribers: kcc, aizatsky, zaks.anna, llvm-commits.

[LibFuzzer] Emit error during configuration if LLVM_USE_SANITIZER is not correctly set.

Previously CMake would successfully configure and compile (with warnings
about ``-fsanitize-coverage=...`` being unused) but the tests LibFuzzer
tests would fail.

This patch is dependent on http://reviews.llvm.org/D20558

http://reviews.llvm.org/D20662

Files:
  lib/Fuzzer/CMakeLists.txt

Index: lib/Fuzzer/CMakeLists.txt
===================================================================
--- lib/Fuzzer/CMakeLists.txt
+++ lib/Fuzzer/CMakeLists.txt
@@ -2,6 +2,12 @@
 # Disable the coverage and sanitizer instrumentation for the fuzzer itself.
 set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters -Werror")
 if( LLVM_USE_SANITIZE_COVERAGE )
+  if(NOT "${LLVM_USE_SANITIZER}" STREQUAL "Address")
+    message(FATAL_ERROR
+      "LLVM_USE_SANITIZER must be set to Address"
+      " to build LibFuzzer"
+      )
+  endif()
   add_library(LLVMFuzzerNoMainObjects OBJECT
     FuzzerCrossOver.cpp
     FuzzerTraceState.cpp


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