optionally enable oss-fuzz targets via --enable-fuzzers

Change-Id: I16f52515a149a1e6e47cd0301a45db84ddd95885

Repository.mk

@@ -93,6 +93,7 @@ $(eval $(call gb_Helper_register_executables_for_install,SDK,sdk, \
 
 $(eval $(call gb_Helper_register_executables_for_install,OOO,brand, \
 	$(call gb_Helper_optional,BREAKPAD,minidump_upload) \
+	$(call gb_Helper_optional,FUZZERS,wmftester) \
 	$(if $(filter-out ANDROID IOS MACOSX WNT,$(OS)),oosplash) \
 	soffice_bin \
 	$(if $(filter DESKTOP,$(BUILD_TYPE)),unopkg_bin) \

config_host.mk.in

@@ -121,6 +121,7 @@ export ENABLE_COLLADA=@ENABLE_COLLADA@
 export ENABLE_CRASHDUMP=@ENABLE_CRASHDUMP@
 export ENABLE_CUPS=@ENABLE_CUPS@
 export ENABLE_CURL=@ENABLE_CURL@
+export ENABLE_FUZZERS=@ENABLE_FUZZERS@
 export ENABLE_DBGUTIL=@ENABLE_DBGUTIL@
 export ENABLE_DBUS=@ENABLE_DBUS@
 export ENABLE_DCONF=@ENABLE_DCONF@

configure.ac

@@ -1049,6 +1049,11 @@ AC_ARG_ENABLE(fetch-external,
         [Disables fetching external tarballs from web sources.])
 )
 
+AC_ARG_ENABLE(fuzzers,
+    AS_HELP_STRING([--enable-fuzzers],
+        [Enables building libfuzzer targets for fuzz testing.])
+)
+
 AC_ARG_ENABLE(pch,
     AS_HELP_STRING([--enable-pch],
         [Enables precompiled header support for C++. Forced default on Windows/VC build])
@@ -9206,6 +9211,20 @@ else
 fi
 AC_SUBST(ENABLE_BREAKPAD)
 
+dnl ==================================================================
+dnl libfuzzer
+dnl ==================================================================
+AC_MSG_CHECKING([whether to enable fuzzers])
+if test "$enable_fuzzers" != yes; then
+    AC_MSG_RESULT([no])
+else
+    AC_MSG_RESULT([yes])
+    ENABLE_FUZZERS="TRUE"
+    AC_DEFINE(ENABLE_FUZZERS)
+    BUILD_TYPE="$BUILD_TYPE FUZZERS"
+fi
+AC_SUBST(ENABLE_FUZZERS)
+
 dnl ===================================================================
 dnl Orcus
 dnl ===================================================================

distro-configs/LibreOfficeOssFuzz.conf

+--enable-fuzzers
 --disable-postgresql-sdbc
 --disable-firebird-sdbc
 --disable-coinmp

vcl/Module_vcl.mk

@@ -95,6 +95,12 @@ $(eval $(call gb_Module_add_targets,vcl,\
 ))
 endif
 
+ifneq ($(ENABLE_FUZZERS),)
+$(eval $(call gb_Module_add_targets,vcl,\
+    Executable_wmftester \
+))
+endif
+
 $(eval $(call gb_Module_add_check_targets,vcl,\
 	CppunitTest_vcl_lifecycle \
 	CppunitTest_vcl_bitmap_test \