current directory: /Users/roadan/Work/apache/incubator-amaterasu-site/vendor/bundle/ruby/2.4.0/gems/ffi-1.9.18/ext/ffi_c
/usr/local/opt/ruby/bin/ruby -r ./siteconf20170921-22476-1wjs3v0.rb extconf.rb
checking for ffi.h... no
checking for ffi.h in /usr/local/include,/usr/include/ffi... yes
checking for ffi_call() in -lffi... yes
checking for ffi_prep_closure()... yes
checking for ffi_raw_call()... no
checking for shlwapi.h... no
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_with_gvl()... yes
checking for rb_thread_call_without_gvl()... yes
checking for ffi_prep_cif_var()... no
creating extconf.h
creating Makefile

current directory: /Users/roadan/Work/apache/incubator-amaterasu-site/vendor/bundle/ruby/2.4.0/gems/ffi-1.9.18/ext/ffi_c
make "DESTDIR=" clean

current directory: /Users/roadan/Work/apache/incubator-amaterasu-site/vendor/bundle/ruby/2.4.0/gems/ffi-1.9.18/ext/ffi_c
make "DESTDIR="
compiling AbstractMemory.c
compiling ArrayType.c
compiling Buffer.c
compiling Call.c
Call.c:355:5: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration]
    rbffi_thread_blocking_region(call_blocking_function, data, (void *) -1, NULL);
    ^
./Thread.h:78:39: note: expanded from macro 'rbffi_thread_blocking_region'
# define rbffi_thread_blocking_region rb_thread_call_without_gvl
                                      ^
1 warning generated.
compiling ClosurePool.c
compiling DataConverter.c
compiling DynamicLibrary.c
compiling Function.c
Function.c:563:9: warning: implicit declaration of function 'rb_thread_call_without_gvl' is invalid in C99 [-Wimplicit-function-declaration]
        rb_thread_call_without_gvl(async_cb_wait, &w, async_cb_stop, &w);
        ^
1 warning generated.
compiling FunctionInfo.c
compiling LastError.c
compiling LongDouble.c
compiling MappedType.c
compiling MemoryPointer.c
compiling MethodHandle.c
compiling Platform.c
compiling Pointer.c
compiling Struct.c
compiling StructByReference.c
compiling StructByValue.c
compiling StructLayout.c
compiling Thread.c
compiling Type.c
compiling Types.c
compiling Variadic.c
compiling ffi.c
linking shared-object ffi_c.bundle

current directory: /Users/roadan/Work/apache/incubator-amaterasu-site/vendor/bundle/ruby/2.4.0/gems/ffi-1.9.18/ext/ffi_c
make "DESTDIR=" install
/usr/bin/install -c -m 0755 ffi_c.bundle ./.gem.20170921-22476-vyiwyr