brlcad 7.16.6-1 build error

Making all in png
make[4]: Entering directory `/tmp/bauerbill/build/aur/brlcad/src/brlcad-7.16.6/src/other/tkimg/png'
/bin/sh ../../../../libtool --silent --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I../../../../include  -DPNG_PACKAGE_NAME=\"libpng\" -DPNGTCL_PACKAGE_NAME=\"pngtcl\" -DTKIMG_VERSION="\"1.3\"" -DTKIMG_PNG_PACKAGE_NAME=\"Tkimgpng\" -I../../../../src/other/tkimg/base -I../../../../src/other/tkimg/png -I../../../../src/other/tkimg/pngtcl     -I/usr/local/include -DBRLCADBUILD=1 -I../../../../include -I../../../../src/other/openNURBS   -march=x86-64 -mtune=generic -O2 -pipe -pipe -fno-strict-aliasing -fno-common -fexceptions -g3 -gstabs+ -c -o png.lo png.c
In file included from ../../../../src/other/tkimg/pngtcl/pngtcl.h:131,
                 from png.c:24:
../../../../src/other/tkimg/pngtcl/pngtclDecls.h:49: error: conflicting types for 'png_get_compression_buffer_size'
/usr/include/png.h:1559: note: previous declaration of 'png_get_compression_buffer_size' was here
../../../../src/other/tkimg/pngtcl/pngtclDecls.h:52: error: conflicting types for 'png_set_compression_buffer_size'
/usr/include/png.h:1562: note: previous declaration of 'png_set_compression_buffer_size' was here
../../../../src/other/tkimg/pngtcl/pngtclDecls.h:339: error: conflicting types for 'png_malloc'
/usr/include/png.h:2104: note: previous declaration of 'png_malloc' was here
../../../../src/other/tkimg/pngtcl/pngtclDecls.h:353: error: conflicting types for 'png_malloc_default'
/usr/include/png.h:2144: note: previous declaration of 'png_malloc_default' was here
../../../../src/other/tkimg/pngtcl/pngtclDecls.h:383: error: conflicting types for 'png_get_rowbytes'
/usr/include/png.h:2203: note: previous declaration of 'png_get_rowbytes' was here
make[4]: *** [png.lo] Error 1
make[4]: Leaving directory `/tmp/bauerbill/build/aur/brlcad/src/brlcad-7.16.6/src/other/tkimg/png'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/tmp/bauerbill/build/aur/brlcad/src/brlcad-7.16.6/src/other/tkimg'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/tmp/bauerbill/build/aur/brlcad/src/brlcad-7.16.6/src/other'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/bauerbill/build/aur/brlcad/src/brlcad-7.16.6/src'
make: *** [all-recursive] Error 1
==> ERROR: Build Failed.
    Aborting...