ComputingPolicies: add_usr.sh

# add_usr NEW_USR_PATH
#    Updates environ variables to reference that NEW_USR_PATH
#    contains system resources.

# by Renaud Detry

# Copy this file into your ~/.bashrc, (restart the shell),
# then type commands like `add_usr $HOME/usr`

function add_usr ()
{
  new_usr=$1
  
  [ "$new_usr" = "" ] && return
  [ -d "$new_usr" ] || return
  
  PATH=${new_usr}/bin:${new_usr}/sbin:$PATH
  MANPATH=${new_usr}/man:${new_usr}/share/man:$MANPATH
  
  CPPFLAGS="-I${new_usr}/include $CPPFLAGS"
  LDFLAGS="-L${new_usr}/lib $LDFLAGS"
  LD_LIBRARY_PATH=${new_usr}/lib:$LD_LIBRARY_PATH
  DYLD_LIBRARY_PATH=${new_usr}/lib:$DYLD_LIBRARY_PATH
  
  PKG_CONFIG_PATH=${new_usr}/lib/pkgconfig:$PKG_CONFIG_PATH
  ACLOCAL_FLAGS="-I${new_usr}/share/aclocal $ACLOCAL_FLAGS"
  
  CMAKE_INCLUDE_PATH=${new_usr}/include:$CMAKE_INCLUDE_PATH
  CMAKE_LIBRARY_PATH=${new_usr}/lib:$CMAKE_LIBRARY_PATH
  
  export PATH MANPATH CPPFLAGS LDFLAGS LD_LIBRARY_PATH \
         DYLD_LIBRARY_PATH  PKG_CONFIG_PATH ACLOCAL_FLAGS \
         CMAKE_INCLUDE_PATH CMAKE_LIBRARY_PATH
}