Re: srcdir != buildir woes

[Dan Kegel]

Angus Leeming wrote:
> Guys, I have a Makefile containing some source files:
>
> UISRCS = optionDialogGUIWidget_base.ui \
>         optionDialogAccessibilityWidget.ui
>
> MOCSRCS = documentPageCache.h \
>         documentWidget.h
>
> The .ui files are processed to create .h files:
> $(objdir)/%.h: $(srcdir)/%.ui
>         $(UIC) $< > $@
>
> The .h files are processed to produce .moc files.
> $(objdir)/%.moc: $(srcdir)/%.h
>         $(MOC) -o $@ $<
>
> The .moc files are #included in my C++ source.
>
> However, here's the rub. When my srcdir != buildir the generated .h files
> are not in the srcdir and so the .h -> .moc step is failing. For obvious
> reasons.
>
> I can add another rule, so:
>
> $(objdir)/%.moc: %.h
>         $(MOC) -o $@ $<
>
> (and this works) but obviously things are going to get confused when srcdir
> and builddir are the same.

Can you surround that rule with an "ifneq($(srcdir),$(objdir))" conditional,
or something like that?

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