Howdy all!
I believe the common consensus is that one should not set CFLAGS in
configure.ac.
However, I have a problem that seems to call for it. Is there a better
way to get this working then messing with CFLAGS?
My configure allows the user to specify a location for a library, the
HDF5 library. So they can do --with-hdf5=/some/location. I do it like
this:
AC_ARG_WITH([hdf5],
[AS_HELP_STRING([--with-hdf5=<directory>],
[Specify location of HDF5 library. Configure will
expect to find subdirs include and lib.])])
AM_CONDITIONAL(USE_HDF5_DIR, [test ! "x$with_hdf5" = x])
AC_SUBST(HDF5DIR, [$with_hdf5])
Then, in the automake files:
# If the user specified a root location for HDF5, use it.
if USE_HDF5_DIR
AM_CPPFLAGS += [EMAIL PROTECTED]@/include
AM_LDFLAGS += [EMAIL PROTECTED]@/lib
endif
But now I want to test during configure that I can really link to the
HDF5 library (i.e. did they provide a valid location?). This is before
the makefiles are even built, of course. So I try this in
configure.ac:
AC_CHECK_LIB([hdf5], [H5Fflush], [], [nc_hdf5_lib_missing=yes])
But this doesn't work, because it doesn't know about the location that
the user has specified. How do I get this to work without setting
CFLAGS in configure?
Thanks for any suggestions!
Ed
--
Ed Hartnett -- [EMAIL PROTECTED]
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