Re: [avr-gcc-list] __DATE__ constant, any way to format it differently ?

[Steven Michalske]

great make snippet.

one suggestion,  this doesn't  check if the files were modified from  
the svn revision.

if you only compile code that is checked in this is fine,  if you have  
changes in the working copy this poses problems.

I have used and seen scripts that add a single letter m to the  
revision number to indicate that the repository is modified.

Hardkrash

On Jan 28, 2009, at 12:10 PM, Dave Hylands wrote:

> HI Vince,
>
> ...snip...
> > While I am at it, in the same vein, has anybody a trick to retrieve
> > the program revision number from subversion, so I can display that  
> > too
> > along with the compilation date ?
>
> This is really a make question and not a gcc question.
>
> I created the following Makefile (which I called svn-version.mk), and
> then in my normal Makefile (I use handcoded Makefiles), I put this:
>
> all: svn-version.h
> include ${PATH_TO_SVN_VERSION}/svn-version.mk
>
> and make my code have
>
> #include "svn-version.h"
>
> My makefiles also do dependency generation, which will automatically
> add the svn-version.h file as a dependent.
>
> --
> Dave Hylands
> Shuswap, BC, Canada
> http://www.DaveHylands.com/
>
>
>
> ###########################################################################
> #
> # svn-version.mk - Creates the svn-version.h file
> #
> ###########################################################################
>
> #--------------------------------------------------------------------------
> #
> # Rule to update svn-version.h file. If a C file includes this file  
> then
> # the dependcy generator will cause this file to be generated.
> #
> # To prevent unnecessary updates, a temporary file is created and  
> compared
> # to svn-version.h, so that svn-version.h is only touched if a change
> # is detected.
> #
>
> svn-revision := $(subst Revision:,,$(shell svn info | grep Revision:))
> ifeq ($(strip $(svn-revision)),)
> svn-revision := 0
> endif
>
> svn-version.h: FORCE
>         @echo "Creating svn-version.h ..."
>         @echo "/*" > svn-version.tmp
>         @echo " * Generated file - Do NOT edit" >> svn-version.tmp
>         @echo " */" >> svn-version.tmp
>         @echo >> svn-version.tmp
>         @echo "#define     SVN_REVISION $(svn-revision)" >> svn-version.tmp
> 	@cmp --quiet svn-version.tmp svn-version.h || cp svn-version.tmp  
> svn-version.h
>         @rm svn-version.tmp
>
> ifneq ($(wildcard svn-version.h),)
> clean: clean-svn-version
>
> clean-svn-version:
>         @echo "Removing svn-version.h ..."
>         @rm svn-version.h
> endif
>
>
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