CMake: Check C rather than C++ compiler for clang for fuzzing

diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 502b876c4631576a4933cc5124ab61e8c936c418..24667e6ff7b1b2b41a7dab745a5f92ed7bc80def 100644 (file)
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -326,7 +326,7 @@ if(BUILD_tests)
 endif(BUILD_tests)
 
 if(BUILD_fuzzers)
-    if(NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    if(NOT "${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
         message(SEND_ERROR
             "Building fuzz targets without clang is not supported. Please set "
             "-DCMAKE_C_COMPILER=clang.")