[Spice-devel] [PATCH] Fix build when builddir != srcdir

[Frediano Ziglio]

> 
> The following build error occurs when building outside of the source
> directory:
> 
> glib-mkenums --template spice-server-enums.tmpl.c ../../server/spice-server.h
> > spice-server-enums.c
> Can't open spice-server-enums.tmpl.c: No such file or directory
> Makefile:1111: recipe for target 'spice-server-enums.c' failed
> 
> GNU Make does some magic to know that the spice-server-enums.tmpl.c file
> listed in the prerequisites for the rule is located in the srcdir. But
> when we use the bare filename in the rule definition, it assumes that it is
> in the builddir. If there was an automatic variable that we could use
> (like $< that we already use for the first prerequisite), the srdir
> would be automatically prepended to the filename, but there's nothing we
> can use for the second prerequisite. So we need to explicitly specify
> the location of the input template file.
> ---
>  server/Makefile.am | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/server/Makefile.am b/server/Makefile.am
> index 972f3e2..949e56a 100644
> --- a/server/Makefile.am
> +++ b/server/Makefile.am
> @@ -202,10 +202,10 @@ libspice_server_la_LIBADD = libserver.la
>  libspice_server_la_SOURCES =
>  
>  spice-server-enums.c: spice-server.h spice-server-enums.tmpl.c
> -	$(AM_V_GEN)glib-mkenums --template spice-server-enums.tmpl.c $< > $@
> +	$(AM_V_GEN)glib-mkenums --template $(srcdir)/spice-server-enums.tmpl.c $< >
> $@
>  
>  spice-server-enums.h: spice-server.h spice-server-enums.tmpl.h
> -	$(AM_V_GEN)glib-mkenums --template spice-server-enums.tmpl.h $< > $@
> +	$(AM_V_GEN)glib-mkenums --template $(srcdir)/spice-server-enums.tmpl.h $< >
> $@
>  
>  EXTRA_DIST =					\
>  	spice-bitmap-utils.tmpl.c			\

Actually there may be a trick:

spice-server-enums.h: spice-server-enums.tmpl.h spice-server.h
	$(AM_V_GEN)glib-mkenums --template $^ > $@

the $^ should be replaced by both so the command should receive the
right files.

(didn't try, my spice directory is in a messy state at the moment).

Frediano