[pdf-devel] Task 88 - dependencies in configure.ac

[Sylvain Beucler]

Hi,

Here's some progress with task #88 "Dependencies detection in
configuration time".

The system imports Gnulib's "havelib" module and configure.ac uses
AC_LIB_HAVE_LINKFLAGS to:
- test the library presence
- define $HAVE_LIBMYLIB variables (library detection)
- add --with-libmylib-prefix= to specify alternate locations
- add --without-libmylib-prefix= to avoid trying some locations

It's enhanced by AC_ARG_WITH to:
- define $with_lib variables (library specification)
- add --with-lib and --without-lib options in ./configure

(more on AC_LIB_HAVE_LINKFLAGS:
 http://lists.gnu.org/archive/html/bug-gnulib/2009-02/msg00016.html)


At the end of the script there's a set of tests to tell the users
everything he needs to fix (all the errors are mentioned in a row, so
the user doesn't have to configure / fix 1 lib / configure / fix 1 lib
/ etc.). In particular tests such as:

  if test "x$HAVE_LIBJBIG2DEC" = "xno" -a "x$with_jbig2dec" != "xno"; then

verify if the library specification (even if it's the default
specification) matches the library detection.

If there's any error AC_OUTPUT is not executed.


If this sounds good to you I can polish configure.ac some more.


(Incidentally the script also uses AM_ICONV from the "iconv" module
but that's another story :))

-- 
Sylvain

configure.ac
Description: Text document