you shouldn't have to do that. There are multitudes of projects that
do exactly what you are doing and don't have continuous rebuilds. Now,
having said that I am _assuming_ that osconfig.h.in is NOT being
changed, generated, updated or in any way changed? osconfig.h.in being
changed would cause "configure_file()" to re-run which will regenerate
the osconfig.h file.
Early in the HDF5/CMake port we were doing exactly that which
caused HDF5 to be rebuilt just about completely because the "H5conf.h"
file was always being generated at cmake time.
_________________________________________________________
Mike Jackson mike.jack...@bluequartz.net
BlueQuartz Software www.bluequartz.net
Principal Software Engineer Dayton, Ohio
On Jan 12, 2010, at 3:51 PM, Tyler Roscoe wrote:
On Tue, Jan 12, 2010 at 02:09:36PM -0600, Daniel Blezek wrote:
CONFIGURE_FILE(${DCMTK_SOURCE_DIR}/osconfig.h.in
${DCMTK_BINARY_DIR}/include/dcmtk/config/osconfig.h)
However, every time I touch a CMake file, ³osconfig.h² is
regenerated,
causing nearly the entire library to re-build because of
dependancies. Is
this a good/proper/recommended way to guard against regeneration of
the
file?
You could configure_file() to a temporary location, then
'cmake -E copy_if_different' from the temp location to the real
location. This way, the real osconfig.h is only updated (and the
dependent parts of the build are re-compiled) if something has
changed.
tyler
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