On Mon, Feb 02, 2009 at 09:18:14PM +0100, Simon Josefsson wrote: > Sylvain Beucler <b...@beuc.net> writes: > > > Hi, > > > > I'm trying to implement simply a '--with-mylib=/path/to/mylib' option > > in 'configure', and I'm wondering if the 'havelib' would help. > > Hi. I believe it does. > > > However I don't really understand how it's meant to be > > used. Apparently its m4 macros need to be used within a macro > > definition? > > > > Can you explain me basically what it does and how to use it? > > (is it even meant for external use?) > > I'm using it in some projects which aren't using gnulib otherwise, such > as for example libssh2: > > http://www.libssh2.org/wiki/index.php/Main_Page > http://libssh2.cvs.sourceforge.net/viewvc/libssh2/libssh2/ > > Typically you add the lib-ld.m4, lib-link.m4, and lib-prefix.m4 macros > to your project's m4/ directory, and add something like this to > configure.ac: > > AC_LIB_HAVE_LINKFLAGS([ssl], [crypto], [#include <openssl/ssl.h>]) > ... > AC_LIB_HAVE_LINKFLAGS([gcrypt], [], [#include <gcrypt.h>]) > ... > AC_LIB_HAVE_LINKFLAGS([z], [], [#include <zlib.h>]) > > Then add to *_LDFLAGS the automake variables, e.g.: > > libssh2_la_LDFLAGS = $(VERSION) -no-undefined \ > $(LTLIBGCRYPT) $(LTLIBSSL) $(LTLIBZ) > > See complete usage in: > > http://libssh2.cvs.sourceforge.net/viewvc/libssh2/libssh2/configure.in?revision=1.63&view=markup > http://libssh2.cvs.sourceforge.net/viewvc/libssh2/libssh2/src/Makefile.am?revision=1.13&view=markup > > Of course, you may use gnulib-tool to import the files too, to avoid > manual work. But the files are relatively stable and have been tested > on many platforms already. > > Read the *.m4 files, they contain documentation for the various macros > you may use.
Thanks, I just couldn't find the main macro to call, and your examples are good. The AC_LIB_HAVE_LINKFLAGS macro generates options like "--with-libmylib-prefix". It sounds a bit unclear to specify options such as --without-libmylib-prefix to disable "mylib" (i.e. it sounds like we're disabling mylib's *additional prefix* only, "--without-mylib" would be more straightforward). Is that normal? -- Sylvain
