Re: merging imread and imwrite

[John W. Eaton]

On  1-Feb-2008, Shai Ayal wrote:

| I'm not exactly sure how dynamic linking works, but is there no way to
| add this to octave such that if someone does not use imread/imwrite
| then the libraries don't get loaded to memory?

We can do this by just linking the Magick++ library to the
imread/imwrite/etc. .oct files and not to Octave itself.  This is
currently the way we handle several other libraries.  For example, see
the following lines in src/Makefile.in:

  ifeq ($(ENABLE_DYNAMIC_LINKING), true)
    ifdef CXXPICFLAG
      convhulln.oct : pic/convhulln.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(QHULL_LIBS)
      __delaunayn__.oct : pic/__delaunayn__.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(QHULL_LIBS)
      __voronoi__.oct : pic/__voronoi__.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(QHULL_LIBS)
      regexp.oct : pic/regexp.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(REGEX_LIBS)
      urlwrite.oct : pic/urlwrite.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(CURL_LIBS)
      __glpk__.oct : pic/__glpk__.o octave$(EXEEXT)
            $(DL_LD) $(DL_LDFLAGS) -o $@ $< $(OCT_LINK_DEPS) $(GLPK_LIBS)
    else
      ...
    endif
  endif

The $(QHULL_LIBS), $(REGEX_LIBS), $(CURL_LIBS), and $(GPLK_LIBS)
should not be linked to Octave itself, or
liboctinterp/liboctave/libcruft.

jwe