if HAVE_LIBPNG libgd_test_programs += \ gdimageconvolution/basic endif EXTRA_DIST += \ gdimageconvolution/CMakeLists.txt \ gdimageconvolution/basic.png \ gdimageconvolution/basic_edge_detect_quick.png \ gdimageconvolution/basic_emboss.png \ gdimageconvolution/basic_mean_removal.png \ gdimageconvolution/basic_smooth.png