[lmi-commits] [6509] Do build DLLs, not static libraries, when cross-compiling

[Vadim Zeitlin]

Revision: 6509
          http://svn.sv.gnu.org/viewvc/?view=rev&root=lmi&revision=6509
Author:   zeitlin
Date:     2016-02-27 20:55:27 +0000 (Sat, 27 Feb 2016)
Log Message:
-----------
Do build DLLs, not static libraries, when cross-compiling

This required:

- Adding missing "-no-undefined" to LDFLAGS as DLLs won't be created by
  libtool without this option in any case.
- Adding win32-dll to LT_INIT() options as DLLs are not created by libtool
  by default (!).
- Adding a hack to disable libtool smart algorithm for determining whether the
  library dependencies can be linked into a DLL because it seems completely
  useless as any library can be linked into a DLL under MSW and it just
  prevented any DLLs from being created because of their static Boost and
  xmlwrapp libraries dependencies.

Modified Paths:
--------------
    lmi/trunk/Makefile.am
    lmi/trunk/configure.ac

Modified: lmi/trunk/Makefile.am
===================================================================
--- lmi/trunk/Makefile.am       2016-02-12 22:23:24 UTC (rev 6508)
+++ lmi/trunk/Makefile.am       2016-02-27 20:55:27 UTC (rev 6509)
@@ -207,7 +207,7 @@
 
 libskeleton_la_CXXFLAGS = \
      $(AM_CXXFLAGS) $(WX_CXXFLAGS) $(XMLWRAPP_CFLAGS) $(GTK_CFLAGS)
-
+libskeleton_la_LDFLAGS = -no-undefined $(AM_LDFLAGS)
 libskeleton_la_LIBADD = \
     liblmi.la \
     libwx_new.la \

Modified: lmi/trunk/configure.ac
===================================================================
--- lmi/trunk/configure.ac      2016-02-12 22:23:24 UTC (rev 6508)
+++ lmi/trunk/configure.ac      2016-02-27 20:55:27 UTC (rev 6509)
@@ -246,14 +246,23 @@
 
 dnl === Configure libtool ===
 
+dnl Hack: ensure that libtool doesn't do anything "smart" to determine whether
+dnl it can link MSW DLLs with their dependencies because this is never a
+dnl problem for this platform.
+dnl
+dnl This obviously relies on the details of libtool implementation and can
+dnl break with the future libtool versions (last version tested is 2.4.2).
+if test "$USE_WINDOWS" = "1"; then
+    lt_cv_deplibs_check_method=pass_all
+fi
+
 dnl We can't do this at the end because we need the correct values
 dnl for enable_shared/static variables which appears to be defined
 dnl by AC_PROG_LIBTOOL (for ex. with --disable-shared you get only
 dnl enable_shared=no before this point and enable_static=yes only after)
 dnl Wx configuration part needs exactly that feature to understand
 dnl what library type build we're using.
-AC_DISABLE_STATIC   dnl don't waste time on static build by default
-AC_PROG_LIBTOOL
+LT_INIT([disable-static,win32-dll])
 
 dnl use C++ compiler as we're checking for C++ libraries/headers from now on
 dnl (we couldn't do it before as libtool tests must be done with C compiler)