libgphoto2_port/m4/gp-dynamic-libraries.m4

   1 AC_DEFUN([GP_DYNAMIC_LIBRARIES],[dnl
   2 dnl We require either of those
   3 dnl AC_REQUIRE([AC_LIBTTDL_INSTALLABLE])dnl
   4 dnl AC_REQUIRE([AC_LIBLTDL_CONVENIENCE])dnl
   5 AC_REQUIRE([AC_LIBTOOL_DLOPEN])dnl
   6 AC_REQUIRE([AC_PROG_LIBTOOL])dnl
   7 dnl ---------------------------------------------------------------------------
   8 dnl Check for libltdl:
   9 dnl  - lt_dlforeachfile has been introduced in libtool-1.4.
  10 dnl  - However, there are still systems out there running libtool-1.3.
  11 dnl    For those, we will use our shipped libltdl. This has the welcome
  12 dnl    side effect that we don't have to distinguish between libltdl 1.3 with
  13 dnl    and without the notorious segfault bug.
  14 dnl  - FIXME: In case we're using our own version, we have to check whether
  15 dnl           -ldl is required?
  16 dnl ---------------------------------------------------------------------------
  17 # $0
  18 ltdl_msg="no (not found or too old)"
  19 have_ltdl=false
  20 LIBS_save="$LIBS"
  21 LIBS="$LIBLTDL"
  22 AC_CHECK_LIB([ltdl], [lt_dlforeachfile],[
  23         CPPFLAGS_save="$CPPFLAGS"
  24         CPPFLAGS="$LTDLINCL"
  25         AC_CHECK_HEADER([ltdl.h],[
  26                 AC_DEFINE([HAVE_LTDL],1,[whether we use libltdl])
  27                 ltdl_msg="yes (from system)"
  28                 have_ltdl=:
  29         ])
  30         CPPFLAGS="$CPPFLAGS_save"
  31 ])
  32 LIBS="$LIBS_save"
  33 if "$have_ltdl"; then :; else
  34         AC_MSG_CHECKING([for included libltdl])
  35         if test -d "$srcdir/libltdl"; then
  36                 LIBLTDL="\$(top_builddir)/libltdl/libltdlc.la"
  37                 LTDLINCL="-I\$(top_srcdir)/libltdl"
  38                 have_ltdl=:
  39                 ltdl_msg="yes (included)"
  40                 AC_MSG_RESULT([yes])
  41         else
  42                 AC_MSG_RESULT([no])
  43                 AC_MSG_ERROR([
  44 *** Could not detect or configure libltdl.
  45 ])
  46         fi
  47 fi
  48 GP_CONFIG_MSG([libltdl],["${ltdl_msg}"])
  49 ])dnl
  50 dnl
  51 dnl ####################################################################
  52 dnl
  53 dnl Please do not remove this:
  54 dnl filetype: 2b993145-3256-47b4-84fd-ec4dcdf4fdf9
  55 dnl I use this to find all the different instances of this file which
  56 dnl are supposed to be synchronized.
  57 dnl
  58 dnl Local Variables:
  59 dnl mode: autoconf
  60 dnl End: