add required lib if UMF_BUILD_FUZZTESTS is set

Author: bratpiorka

CMakeLists.txt

@@ -585,6 +585,35 @@ if(UMF_BUILD_FUZZTESTS
    AND LINUX)
     add_compile_options("-fsanitize=fuzzer-no-link")
     add_link_options("-fsanitize=fuzzer-no-link")
+
+    #file(GLOB_RECURSE LIBRARY_FILES /usr/lib/*)
+    #message(STATUS "Files in /usr/lib:")
+    #foreach(FILE ${LIBRARY_FILES})
+    #    message(STATUS "  ${FILE}")
+    #endforeach()
+
+    message(STATUS "CMAKE_C_COMPILER_VERSION: ${CMAKE_C_COMPILER_VERSION}")
+    message(STATUS "/usr/lib/llvm-{CMAKE_C_COMPILER_VERSION}/lib/clang/${CMAKE_C_COMPILER_VERSION}/lib/linux/")
+    message(STATUS "/usr/lib/llvm-18/lib/clang/18/lib/linux/libclang_rt.fuzzer_no_main-x86_64.a")
+
+    find_library(
+        FUZZER_NO_MAIN_LIB
+        NAMES libclang_rt.fuzzer_no_main-x86_64.a
+        PATHS
+            "/usr/lib/llvm-{CMAKE_C_COMPILER_VERSION}/lib/clang/${CMAKE_C_COMPILER_VERSION}/lib/linux/"
+            "lib/clang/${CMAKE_C_COMPILER_VERSION}/lib/linux/"
+    )
+
+    # /usr/lib/llvm-18/lib/clang/18/lib/linux/libclang_rt.fuzzer_no_main-x86_64.a
+
+    if(FUZZER_NO_MAIN_LIB)
+        message(STATUS "Found fuzzer lib: ${FUZZER_NO_MAIN_LIB}")
+        link_libraries(${FUZZER_NO_MAIN_LIB})
+        link_libraries("stdc++")
+    else()
+        message(FATAL_ERROR "libclang_rt.fuzzer_no_main-x86_64 not found!")
+        
+    endif()
 endif()
 
 # A header-only lib to specify include directories in transitive dependencies