Re: automake/autoconf bug

[Andrew D Jewell]

Here I am, answering my own question.

Properly phrased, my bug report should have complained of problems 
when changing the file extensions between .c and .cc

The trouble lies in the secret hidden ".deps" directory that is made 
in the process. If you have foo.c, it writes down "foo.o: foo.c".
If later you change foo.c to foo.cc, the "foo.o: foo.c" line remains, 
and confuses everything.

My a_ filename problems were a red herring, and only seemed like a 
problem because they were always listed first, and also tended to be 
the files that got their extensions changed.

Anyway, the .deps problem exists, and should be looked into one day.

adj

At 9:39 PM -0400 6/10/02, Andrew D Jewell wrote:
> Or perhaps just a documentation oversight, if this is supposed to 
> happen. Or perhaps I'm missing something obvious.
>
> It seems that mixing .c and .cc files in certain ways confuses things.
>
> For example, take the Makefile.am
>
> noinst_LIBRARIES = libfoo.a
> libfoo_a_SOURCES = foo.c
>
> this results in the error :
>
> gmake[2]: *** No rule to make target `foo.cc', needed by `foo.o'.  Stop.
>
> In another iteration, I had a_bin_search.cc in the SOURCES 
> definition, and got an error that a_bin_search.c couldn't be made. 
> The weird part there is that I changed the name to abinsearch.cc and 
> the problem went away.
>
> The configure.ac was about as simple as it could be :
>
> dnl Process this file with autoconf to produce a configure script. -*-m4-*-
> AC_INIT(foo, 1.2, address@hidden)
>
> AC_CONFIG_AUX_DIR(config)
> AM_CONFIG_HEADER(config.h:config.hin)
> AC_CANONICAL_HOST
>
> AM_INIT_AUTOMAKE
>
> dnl Checks for programs.
>
> AC_PROG_CC
> AC_PROG_CPP
> AC_PROG_CXX
> AC_PROG_GCC_TRADITIONAL
> AC_PROG_RANLIB
>
> AC_CONFIG_FILES(
>   Makefile
>   lib/Makefile
>   )
> AC_OUTPUT
>
> Any help or guesses would be most appreciated.
>
> autoconf (GNU Autoconf) 2.53
> automake (GNU automake) 1.6.1
> GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
> Linux arc132.alexa.com 2.4.17-2v3 #1 Sun Apr 14 22:15:52 PDT 2002 i686 unknown
>
> thanks,
> adj
>
>
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