CMake is funky on detecting Intel 17 as GCC compatible.

Summary: This adds a fallback in case that the Intel compiler is failed to be detected correctly.

Reviewers: chapuni

Reviewed By: chapuni

Subscribers: llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D27610

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293230 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/modules/DetermineGCCCompatible.cmake

@@ -7,5 +7,7 @@ if(NOT DEFINED LLVM_COMPILER_IS_GCC_COMPATIBLE)
     set(LLVM_COMPILER_IS_GCC_COMPATIBLE OFF)
   elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
     set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
+  elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel" )
+    set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
   endif()
 endif()