No package 'gail' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables GAIL_CFLAGS
and GAIL_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

*** error during stage configure of gtkhtml: Error running ./autogen.sh --prefix  /opt/gnome2  --enable-nss=yes --with-nss-includes=/usr/include/nss3 --with-nss- libs=/usr/lib/ --with-nspr-includes=/usr/include/nspr4 --with-nspr-libs=/usr/lib / *** [1/3]


  [1] rerun stage configure
  [2] ignore error and continue to build
  [3] give up on module
  [4] start shell
  [5] go to stage force_checkout
choice: