On Mar 20, 2009, at 10:12 AM, Bill Hoffman wrote:
Michael Jackson wrote:
On Mar 20, 2009, at 5:30 AM, Eric Noulard wrote:
2009/3/20 Philip Lowman <[email protected]>:
On Thu, Mar 19, 2009 at 11:18 PM, Michael Jackson
<[email protected]> wrote:
I am trying to find a nice portable solution for generating
version
strings based on the date (seems reasonable). I even have my own
c++ code
that can generate the proper string for me. The problem that I
can not seem
to get my head around is that I need to compile and run the
program at cmake
time which probably isn't really going to happen, at least easily.
So. what is everyone else doing for this?
My main goal is to automate the generation of cmake code like the
following:
set ( ${${Project_Name}_VERSION} "2009.03.10")
so that I can later use it for OS X bundle building.
On Unix systems I can easily spawn a "date" command to get what
I need but
what to do on windows?
I use 'date' on unix and nothing but a "nodate" string on
windows :-(
Ugly, but apparently possible with batch file scripting!
http://www.tech-recipes.com/rx/956/windows-batch-file-bat-to-get-current-date-in-mmddyyyy-format/
Another option is you could write a small program which uses
localtime() and
other posix functions to get you the format that you want and
then use the
output from the program via a CHECK_C_SOURCE_COMPILES configure
test.
may be the same idea, use TRY_RUN with your home made portable
source
to get your string at CMake time.
another solution would be to try to find some script language
installed
(perl, python, ...) then EXECUTE_PROCESS with appropriate pieces
of code
for getting the date you want.
I think it would be worth a feature request for cmake -E date
<format>
the "how to get date" is popping again and again.
--
Erk
That was the ticket. The try_run is working as best as I would
expect it to. I plan to wrap that code in a CMake variable so that
I can trigger the try_run when I need to increment the version
string.
After all of this I'll probably put in a feature request for this
functionality to be a part of CMake. Actually, if we could just get
the following variables set by CMake it would be great:
CMAKE_CURRENT_YEAR
CMAKE_CURRENT_MONTH
CMAKE_CURRENT_DAY
CMAKE_CURRENT_HOUR
CMAKE_CURRENT_MINUTE
CMAKE_CURRENT_SECOND
I don't think you could do this as a set of variables. It would be
better as some sort of command. file(GETDATE result) or something.
-Bill
Well, I could but I am really interested in _why_ I would _not_ want
to? Besides the obvious that the variables would basically change
every time that cmake ran which might have some unwanted side effects.
Mike
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