Re: LTLIBOBJS not built when using AC_REPLACE_FUNCS without AC_CONFIG_LIBOBJ_DIR

[Chris Pickett]

Hi Ralf,

It turns out that I can fix my problem by adding @LTLIBOBJS@ to 
libcheck_la_DEPENDENCIES, which is something I set explicitly but 
neglected to mention earlier.

Ralf Wildenhues wrote:
> mkdir src
> cat >configure.ac <<\END
> AC_INIT(a,1)
> AM_INIT_AUTOMAKE(foreign)
> AC_CONFIG_FILES(Makefile src/Makefile)
> AC_PROG_CC
> AC_PROG_LIBTOOL
> AC_REPLACE_FUNCS([strsignal])
> AC_OUTPUT
> END
> echo 'SUBDIRS = src' > Makefile.am
> cat >src/Makefile.am <<\END

However, if you simply add

libcheck_la_DEPENDENCIES =

at this point (at the top of the src/Makefile.am) to your minimal 
example, then strsignal.lo is produced under OS X, but not under 
msys/gcc.  However, if you then take out the libcheckinternal bits it 
fails (correctly) on OS X again.  It looks like libcheckinternal is 
causing strsignal.lo to get built on OS X but not on sys/gcc.

In tracking this down, I found out that neither @LTLIBOBJS@ nor 
@LTALLOCA@ are mentioned in either the "Linking the Program" manual 
section or the "Program and Library Variables" section in the paragraphs 
talking about _DEPENDENCIES, although @LIBOBJS@ and @ALLOCA@ are. 
Minor, but also trivial to fix I guess?  I didn't make a patch because I 
figured it's faster all around for you to just edit the files.

Cheers,
Chris

> libcheck_la_LIBADD      = @LTLIBOBJS@
> libcheckinternal_la_LIBADD      = @LTLIBOBJS@
> lib_LTLIBRARIES = libcheck.la libcheckinternal.la
> END
> touch src/libcheck.c src/libcheckinternal.c
>
> autoreconf -vif  # will error out unless src/strsignal.c exists
>
> ./configure ac_cv_func_strsignal=no  # to fake nonexistent function
> make             # will build and link strsignal.lo