waf: introduce reverse logic for allowing unknown symbols

Some os (ie OSX 10.6) forbids by default unknown symbols so in order to
allow them (for special case) we have no to remove linker option *but*
to add options to ask the linker to be more relax.

Signed-off-by: Andrew Bartlett <abartlet@samba.org>

diff --git a/buildtools/wafsamba/samba_deps.py b/buildtools/wafsamba/samba_deps.py
index adeb3645ce16b58815463eebe08eed958be133d0..0bd2c6cf67bb6e75870343dd13558318e2ea060c 100644 (file)
--- a/buildtools/wafsamba/samba_deps.py
+++ b/buildtools/wafsamba/samba_deps.py
@@ -89,6 +89,10 @@ def build_dependencies(self):
             for f in self.env.undefined_ldflags:
                 self.ldflags.remove(f)
 
+        if getattr(self, 'allow_undefined_symbols', False) and self.env.undefined_ignore_ldflags:
+            for f in self.env.undefined_ignore_ldflags:
+                self.ldflags.append(f)
+
         debug('deps: computed dependencies for target %s: uselib=%s uselib_local=%s add_objects=%s',
               self.sname, self.uselib, self.uselib_local, self.add_objects)
 

diff --git a/wscript b/wscript
index 46773bfd86ad45a0c052b090ad2bc8b2c9f76b2e..7e9d7730ab7d9f0994c0fae085d2a37a6dd7ae27 100755 (executable)
--- a/wscript
+++ b/wscript
@@ -122,6 +122,11 @@ def configure(conf):
     if sys.platform != "openbsd4":
         conf.env.undefined_ldflags = conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True)
 
+    if sys.platform != "openbsd4" and conf.env.undefined_ignore_ldflags == []:
+        if conf.CHECK_LDFLAGS(['-undefined', 'dynamic_lookup']):
+            conf.env.undefined_ignore_ldflags = ['-undefined', 'dynamic_lookup']
+
+
     # gentoo always adds this. We want our normal build to be as
     # strict as the strictest OS we support, so adding this here
     # allows us to find problems on our development hosts faster.