From cee9015ff8ef30dfc3e5ef3b6e0c6bfd1f11f516 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Sun, 15 Aug 2021 13:34:41 +0100
Subject: [PATCH] Add special build mode for OSS-Fuzz.

---
 CMakeLists.txt            |  1 +
 cmake/compilerFlags.cmake |  2 +-
 fuzz/CMakeLists.txt       | 14 ++++++++++----
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7a3102ec..f51cdf33 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,7 @@ option( EXIV2_BUILD_DOC               "Add 'doc' target to generate documentatio
 option( EXIV2_TEAM_EXTRA_WARNINGS     "Add more sanity checks using compiler flags"           OFF )
 option( EXIV2_TEAM_WARNINGS_AS_ERRORS "Treat warnings as errors"                              OFF )
 option( EXIV2_TEAM_USE_SANITIZERS     "Enable ASAN and UBSAN when available"                  OFF )
+option( EXIV2_TEAM_OSS_FUZZ           "Build config for OSS-Fuzz"                             OFF )
 option( EXIV2_TEAM_PACKAGING          "Additional stuff for generating packages"              OFF )
 set(EXTRA_COMPILE_FLAGS " ")
 
diff --git a/cmake/compilerFlags.cmake b/cmake/compilerFlags.cmake
index e45a5e3f..860385f4 100644
--- a/cmake/compilerFlags.cmake
+++ b/cmake/compilerFlags.cmake
@@ -70,7 +70,7 @@ if ( MINGW OR UNIX OR MSYS ) # MINGW, Linux, APPLE, CYGWIN
         # This seems to be causing issues in the Fedora_MinGW GitLab job
         #add_compile_options(-fasynchronous-unwind-tables)
 
-        if( EXIV2_BUILD_FUZZ_TESTS )
+        if( EXIV2_BUILD_FUZZ_TESTS AND NOT EXIV2_TEAM_OSS_FUZZ )
             if (NOT COMPILER_IS_CLANG)
                 message(FATAL_ERROR "You need to build with Clang for the fuzzers to work. "
                         "Use Clang")
diff --git a/fuzz/CMakeLists.txt b/fuzz/CMakeLists.txt
index 378b67b1..a58edda9 100644
--- a/fuzz/CMakeLists.txt
+++ b/fuzz/CMakeLists.txt
@@ -1,10 +1,16 @@
 
 macro(fuzzer name)
     add_executable(${name} ${name}.cpp)
-    set_target_properties(${name}
-            PROPERTIES
-                COMPILE_FLAGS "-fsanitize=fuzzer"
-                LINK_FLAGS "-fsanitize=fuzzer")
+    if(EXIV2_TEAM_OSS_FUZZ)
+        set_target_properties(${name}
+                PROPERTIES
+                    LINK_FLAGS "${LIB_FUZZING_ENGINE}")
+    else()
+        set_target_properties(${name}
+                PROPERTIES
+                    COMPILE_FLAGS "-fsanitize=fuzzer"
+                    LINK_FLAGS "-fsanitize=fuzzer")
+    endif()
     target_link_libraries(${name}
             PRIVATE
             exiv2lib