Re: multi-line AC_SUBSTs as targets in Makefile.am
Hello William, * William Pursell wrote on Mon, Oct 08, 2007 at 12:11:59PM CEST: > Andreas Schwab wrote: >> William Pursell <[EMAIL PROTECTED]> writes: >> >>> I'd like to get away from AC_SUBST_FILE, but I don't see a way >>> around the manner in which automake is building the Makefile. >>> Is there a way to construct a generic target via AC_SUBST? >> >> How about using AM_CONDITIONAL instead? > > How so? What I'm hoping to do is to have a set of generic targets > so that I can have a template Makefile.am that simply includes > the line @MY_TARGETS@ > > I currently have it working with AC_SUBST_FILE, but I'm copying the > template target files into each of my project directory trees. > I would rather install my macros in /usr/share/aclocal, but I > notice that none of the packages I have ever seen invoke > AC_SUBST_FILE, and I suspect the reason is that there's no > good place to put the target file. Well, with Autoconf 2.60 or newer, AC_SUBSTed values can contain newlines, so in principle you could AC_PREREQ([2.60]) AC_SUBST([MY_TARGETS], [# this assignment line is ignored target1: [...] ...]) and it will have roughly the same effect as your previous AC_SUBST_FILE. However, in both cases (AC_SUBST or AC_SUBST_FILE), you put stuff in a Makefile which automake won't see, and all its magic variables, its machinery to let you override its default-provided targets, and so on, won't work as expected. This may in some cases be what you want, but mostly I would guess it shouldn't, unless you are working around some bug in Automake. Instead, I suggest you just use Automake's `include' feature to put the fragment file in the Makefile.am where it is used. This won't relieve you from having to copy the fragment into your projects, but it will cause a readable error message from `automake' if you forgot to. You could provide a `bootstrap' script that does the copying for you. Hope that helps. Cheers, Ralf
Re: multi-line AC_SUBSTs as targets in Makefile.am
Andreas Schwab wrote: William Pursell <[EMAIL PROTECTED]> writes: I'd like to get away from AC_SUBST_FILE, but I don't see a way around the manner in which automake is building the Makefile. Is there a way to construct a generic target via AC_SUBST? How about using AM_CONDITIONAL instead? How so? What I'm hoping to do is to have a set of generic targets so that I can have a template Makefile.am that simply includes the line @MY_TARGETS@ I currently have it working with AC_SUBST_FILE, but I'm copying the template target files into each of my project directory trees. I would rather install my macros in /usr/share/aclocal, but I notice that none of the packages I have ever seen invoke AC_SUBST_FILE, and I suspect the reason is that there's no good place to put the target file.
Re: multi-line AC_SUBSTs as targets in Makefile.am
William Pursell <[EMAIL PROTECTED]> writes: > I'd like to get away from AC_SUBST_FILE, but I don't see a way > around the manner in which automake is building the Makefile. > Is there a way to construct a generic target via AC_SUBST? How about using AM_CONDITIONAL instead? Andreas. -- Andreas Schwab, SuSE Labs, [EMAIL PROTECTED] SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."
multi-line AC_SUBSTs as targets in Makefile.am
I've been using AC_SUBST_FILE to put common targets into my makefile.am's. eg, Makefile.am contains: @FOO_TARGET@ where configure.ac contains FOO_TARGET=foo_target AC_SUBST_FILE(FOO_TARGET) and foo_target contains: foo: echo foo I would like to do this via AC_SUBST, but this completely hoses the Makefile. For example, if configure.ac instead contains: BAR_TARGET="bar: echo bar" AC_SUBST( BAR_TARGET) Then Make bails since Makefile now contains the invalid construct: BAR_TARGET = bar: echo bar I'd like to get away from AC_SUBST_FILE, but I don't see a way around the manner in which automake is building the Makefile. Is there a way to construct a generic target via AC_SUBST?
