Help me PHP + libgd

I have configured PHP with gd, zlib and png but I can't display images Here is configure output: Configuring extensions checking if the location of ZLIB install directory is defined... no checking whether to include ZLIB support... yes checking for gzgets in -lz... yes checking whether to include GD support... yes checking for the location of libpng... yes checking for png_info_init in -lpng... yes checking for gdImageString16 in -lgd... yes checking for gdImagePaletteCopy in -lgd... yes checking for gdImageCreateFromPng in -lgd... yes checking for gdImageCreateFromGif in -lgd... no checking for gdImageGif in -lgd... no checking for gdImageWBMP in -lgd... yes checking for gdImageCreateFromJpeg in -lgd... no checking for gdImageCreateFromXpm in -lgd... yes checking for gdImageCreateFromGd2 in -lgd... yes checking for gdImageCreateTrueColor in -lgd... no checking for gdImageSetTile in -lgd... yes checking for gdImageSetBrush in -lgd... yes checking for gdImageStringTTF in -lgd... yes checking for gdImageStringFT in -lgd... yes checking for gdImageStringFTEx in -lgd... no checking for gdImageColorClosestHWB in -lgd... yes checking for gdImageColorResolve in -lgd... yes checking for gdImageGifCtx in -lgd... no while 'making' there is creation of ext/zlib ext/gd directories but not ext/png does it mean that i made something wrong? PNG testing 'make test' went OK I cannot display PNGs - error is appearing While trying to display WBMP (ImageWBMP function is accessible) there is no error but image does not appear. Can I display it in WAP browser only?