I'm curious if there's a good way to handle the following.
I've got a helper Makefile whose job is to build "everything" in my project --
lots of modules, other initial setup stuff, some with autotools, some without,
etc.
To build the autotools stuff, the recipe is (basically)
$ autoreconf -fvi
$ mkdir build
$ cd build
$ ../configure && make && make install
So far so good.
The bummer is what happens when I run this helper Makefile twice without doing
anything else in between. Ideally (I think), nothing should happen. But, since
I run autoreconf -fvi, it does. I tried just running autoreconf -vi again after
this and at that point running make invokes configure again.
I figure there's a way to set up my helper makefile so that if the build
directory already exists, it just runs make and make install there (depending on
the fancy rules to re-run things when necessary). Only if there's no build
directory does it create one and run configure there. I can probably get it
even more granular so that if the build directory exists, but no Makefile
exists, then it runs configure, etc.
But, this leaves me with a struggle...I bet there are times when I need to
re-run autoreconf, even if the build directory and build/Makefile exist. The
autoconf docs say that
"autoreconf runs autoconf, autoheader, aclocal, automake, libtoolize, and
autopoint (when appropriate)"
It doesn't seem like this is the case though since autoreconf -vi causes
configure to run again when I run make. There's also the case of a new version
of one of the autotools for which I need to run autoreconf -fvi...Any chance
there's a way for autoreconf to figure that out on its own?
As I double-check this before sending, I see something that's no doubt
important. Here's the sequence of commands:
$ autoreconf -fvi
$ mkdir build
$ cd build
$ ../configure
$ make
<stuff happens, as it should>
$ cd ..
$ autoreconf -vi
$ cd build
$ make
<stuff happens, including ./config.status --recheck, make does nothing>
$ cd ..
$ autoreconf -vi
$ cd build
$ make
<no ./config.status and make does nothing>
So, the first time I run autoreconf -vi, something triggers ./config.status to
run again. The second time nothing's changed. The third, fourth, etc. are the
same as the second time.
I repeated the test, running make as
$ make -d -p -r >make.out 2>&1
and see this:
Prerequisite `../configure' is newer than target `config.status'.
Must remake target `config.status'.
/bin/sh ./config.status --recheck
automake 1.9.6, autoconf 2.60.
Any ideas?
Thanks much.
-DB
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