Imported Upstream version 2.6.0

[debian/amanda] / config / amanda / swig.m4

diff --git a/config/amanda/swig.m4 b/config/amanda/swig.m4
new file mode 100644 (file)
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+++ b/config/amanda/swig.m4
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+# OVERVIEW
+#
+#   Set up for building SWIG bindings.  Note that shipped tarballs contain pre-built
+#   SWIG bindings, so there should be no need for SWIG on non-developer machines.
+# SYNOPSIS
+#
+#   Find perl and SWIG, and substitute PERL_INC, the -I command that will lead the compiler
+#   to perl.h and friends.
+#
+#   Supports --with-perlextlibs, for adding extra LIBS declarations to perl extensions.
+#
+AC_DEFUN([AMANDA_SETUP_SWIG],
+[
+    AC_REQUIRE([AMANDA_PROG_SWIG])
+    AC_REQUIRE([AMANDA_PROG_PERL])
+
+    # If we want cygwin to copy ddl to modules directory.
+    WANT_CYGWIN_COPY_PERL_DLL="false"
+
+    # get the include path for building perl extensions
+    PERL_INC=`$PERL -MExtUtils::Embed -e perl_inc`
+    AC_SUBST(PERL_INC)
+
+    if test x"$enable_shared" = x"no"; then
+       AC_MSG_ERROR([*** Amanda cannot be compiled without shared-library support (do not use --disable-shared)])
+    fi
+
+    case "$target" in
+       *freebsd@<:@123456@:>@*) # up to and including FreeBSD 6.*
+           # Before 7.0, FreeBSD systems don't include a DT_NEEDS segment in
+           # libgthread to automatically pull in the desired threading library.
+           # Instead, they assume that any application linking against
+           # libgthread will pull in the threading library.  This is fine for
+           # Amanda C applications, but for Perl applications this assumption
+           # means that the perl binary would pull in the threading library.
+           # But perl is compiled without threading by default.  
+           #
+           # Specifically, this occurs on any FreeBSD using gcc-3.*: the linking
+           # decision is made in gcc's spec files, which were changed in
+           # gcc-4.0.  For a more in-depth discussion, see
+           #  http://wiki.zmanda.com/index.php/Installation/OS_Specific_Notes/Installing_Amanda_on_FreeBSD
+           #
+           # The easiest solution for the "default" case is to link all perl
+           # extension libraries against the threading library, so it is loaded
+           # when perl loads the extension library.  The default threading
+           # library in FreeBSD is libpthread.  The below default will work on
+           # such a FreeBSD system, but ports maintainers and those with
+           # different configurations may need to override this value with
+           # --with-perlextlibs.
+           #
+           # We can't use -pthread because gcc on FreeBSD ignores -pthread in
+           # combination with -shared.  See
+           #   http://lists.freebsd.org/pipermail/freebsd-stable/2006-June/026229.html
+
+           PERLEXTLIBS="-lpthread"
+           ;;
+       *-pc-cygwin)
+           # When need -lperl and the '-L' where it is located,
+           # we don't want the DynaLoader.a
+           PERLEXTLIBS=`perl -MExtUtils::Embed -e ldopts | sed -e 's/^.*-L/-L/'`
+           WANT_CYGWIN_COPY_PERL_DLL="true";
+           ;;
+    esac
+    AM_CONDITIONAL(WANT_CYGWIN_COPY_PERL_DLL,$WANT_CYGWIN_COPY_PERL_DLL)
+
+    AC_ARG_WITH(perlextlibs,
+       AC_HELP_STRING([--with-perlextlibs=libs],[extra LIBS for Perl extensions]),
+       [
+           case "$withval" in
+               y|ye|yes) AC_MSG_ERROR([*** You must specify a value for --with-perlextlibs]);;
+               n|no) PERLEXTLIBS='';;
+               *) PERLEXTLIBS="$withval" ;;
+           esac
+       ])
+    AC_SUBST(PERLEXTLIBS)
+])