Re: how can I use the -C option of 'install' tool

[Peter Johansson]

On 09/09/2012 05:55 PM, Vincent Torri wrote:
> Hey
>
> if I'm not mistaken, the configure script check for a BSD 'install' 
> tool, and usually, INSTALL is set to /some/path/install -c
>
> What I would like to do is, during installation, not modify the 
> destination file if the source file is the same.
>
> 'install' has the -C option for that, if I'm not mistaken.
>
> So i would like to know if it is possible to do that with autoconf 
> macros. If not, what is the best way of doing what I want ?
Hi Vincent,

I have the following snippet in my Makefile.am, which probably assumes 
GNU make.



# like the normal install target, but does not update header files
# (and their time stamps) if the content did not change.
install-modified:
    $(MAKE) install $(AM_MAKEFLAGS) INSTALL_HEADER="$(install_sh_DATA) -C"


Cheers,
Peter