checking whether byte ordering is bigendian... no
checking for iostream... yes
checking if C++ compiler supports bool... yes
checking if C++ compiler supports the explicit keyword... yes
checking whether the compiler supports const_cast<>... yes
checking whether the compiler supports reinterpret_cast<>... yes
checking whether the compiler supports static_cast<>... yes
checking for std::wstring in <string>... yes
checking for std::istream... yes
checking for std::ostream... yes
checking for libraries directory... lib
checking for glibc 2.1 or later... yes
checking for cos... no
checking for floor... no
checking if floating point functions link without -lm... no
checking for sin... yes
checking for ceil... yes
checking if floating point functions link with -lm... yes
checking for wcstoull... yes
configure: WARNING: Defaulting to the the builtin regex library for Unicode build.
checking for zlib.h >= 1.1.4... yes
checking for zlib.h... (cached) yes
checking for deflate in -lz... yes
checking for png.h > 0.90... yes
checking for png.h... (cached) yes
checking for png_sig_cmp in -lpng... yes
checking for jpeglib.h... yes
checking for jpeg_read_header in -ljpeg... yes
checking for tiffio.h... yes
checking for TIFFError in -ltiff... yes
checking for expat.h... yes
checking if expat.h is valid C++ header... yes
checking for XML_ParserCreate in -lexpat... yes
checking for mspack.h... no
checking for GTK+ version...
checking for pkg-config... /usr/bin/pkg-config
checking for GTK+ - version >= 2.0.0... yes (version 2.24.13)
checking whether gtk_icon_size_lookup is declared... yes
checking if GTK+ is version >= 2.6... yes
checking for X11/Xlib.h... yes
checking for X11/XKBlib.h... yes
checking for Xinerama... yes
checking for Xxf86vm extension... yes
checking for X11/extensions/xf86vmode.h... yes
checking for -lSM - X11 session management... yes
checking for OpenGL headers... found in /usr/include
checking for GL/gl.h... yes
checking GL/glu.h usability... no
checking GL/glu.h presence... no
checking for GL/glu.h... no
configure: error: OpenGL libraries not available
=======> ERROR: Building '/usr/ports/contrib/wxgtk/wxgtk#2.8.12-1.pkg.tar.gz' failed.