From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Mon, 28 Mar 2022 23:52:02 +0000 (-0700)
Subject: Use standalone fuzzing runner only when fuzzing engine is not found.
X-Git-Tag: 2.1.0-beta1~293
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98d4908aa67437e199544493fa63d84c16070c54;p=thirdparty%2Fzlib-ng.git

Use standalone fuzzing runner only when fuzzing engine is not found.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2bc748a8..8241d32e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1252,12 +1252,30 @@ if(ZLIB_ENABLE_TESTS)
         -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/run-and-compare.cmake)
 
     if(WITH_FUZZERS)
+        if(CMAKE_C_COMPILER_ID MATCHES "Clang")
+            enable_language(CXX)
+
+            if(DEFINED ENV{LIB_FUZZING_ENGINE})
+                set(FUZZING_ENGINE $ENV{LIB_FUZZING_ENGINE})
+                set(FUZZING_ENGINE_FOUND ON)
+            else()
+                find_library(FUZZING_ENGINE "FuzzingEngine")
+            endif()
+        endif()
+
         set(FUZZERS checksum compress example_small example_large example_flush example_dict minigzip)
         file(GLOB ALL_SRC_FILES "${CMAKE_CURRENT_SOURCE_DIR}/*")
         foreach(FUZZER ${FUZZERS})
-            add_executable(fuzzer_${FUZZER} test/fuzz/fuzzer_${FUZZER}.c test/fuzz/standalone_fuzz_target_runner.c)
+            set(FUZZER_SRCS test/fuzz/fuzzer_${FUZZER}.c)
+            if(NOT FUZZING_ENGINE_FOUND)
+                list(APPEND FUZZER_SRCS test/fuzz/standalone_fuzz_target_runner.c)
+            endif()
+            add_executable(fuzzer_${FUZZER} ${FUZZER_SRCS})
             configure_test_executable(fuzzer_${FUZZER})
             target_link_libraries(fuzzer_${FUZZER} zlib)
+            if(FUZZING_ENGINE_FOUND)
+                target_link_libraries(fuzzer_${FUZZER} ${FUZZING_ENGINE})
+            endif()
             set(FUZZER_COMMAND ${CMAKE_CROSSCOMPILING_EMULATOR} $<TARGET_FILE:fuzzer_${FUZZER}> ${ALL_SRC_FILES})
             add_test(NAME fuzzer_${FUZZER} COMMAND ${FUZZER_COMMAND})
         endforeach()