=> Bootstrap dependency digest>=20010302: found digest-20160304
===> Skipping vulnerability checks.
WARNING: No /var/db/pkg/pkg-vulnerabilities file found.
WARNING: To fix run: `/usr/sbin/pkg_admin -K /var/db/pkg fetch-pkg-vulnerabilities'.
===> Building for guetzli-0.2
==== Building guetzli (release) ====
Creating obj/Release
butteraugli_comparator.cc
Creating bin/Release
debug_print.cc
entropy_encode.cc
guetzli.cc
fdct.cc
gamma_correct.cc
jpeg_data_writer.cc
idct.cc
dct_double.cc
jpeg_data.cc
jpeg_data_reader.cc
jpeg_data_decoder.cc
jpeg_data_encoder.cc
jpeg_huffman_decode.cc
output_image.cc
preprocess_downsample.cc
processor.cc
In file included from guetzli/guetzli.cc:22:
In file included from /data/scratch/graphics/guetzli/work/.buildlink/include/gflags/gflags.h:84:
/data/scratch/graphics/guetzli/work/.buildlink/include/gflags/gflags_declare.h:43:9: warning: 'GFLAGS_NAMESPACE' macro redefined [-Wmacro-redefined]
#define GFLAGS_NAMESPACE gflags
        ^
<command line>:1:9: note: previous definition is here
#define GFLAGS_NAMESPACE google
        ^
quality.cc
guetzli/output_image.cc:206:5: error: use of undeclared identifier 'exit'
    exit(1);
    ^
quantize.cc
score.cc
butteraugli.cc
1 error generated.
guetzli.make:189: recipe for target 'obj/Release/output_image.o' failed
gmake[1]: *** [obj/Release/output_image.o] Error 1
gmake[1]: *** Waiting for unfinished jobs....
1 warning generated.
Makefile:28: recipe for target 'guetzli' failed
gmake: *** [guetzli] Error 2
*** Error code 2

Stop.
make[1]: stopped in /data/pkgsrc/graphics/guetzli
*** Error code 1

Stop.
make: stopped in /data/pkgsrc/graphics/guetzli