I think the following fixes this PR; it consists only in duplicating a
few lines from s-osinte-freebsd.ads to s-osinte-kfreebsd-gnu.ads:
Index: b/src/gcc/ada/s-osinte-kfreebsd-gnu.ads
===================================================================
--- a/src/gcc/ada/s-osinte-kfreebsd-gnu.ads
+++ b/src/gcc/ada/s-osinte-kfreebsd-gnu.ads
@@ -238,6 +238,16 @@
function getpid return pid_t;
pragma Import (C, getpid, "getpid");
+ ---------
+ -- LWP --
+ ---------
+
+ function lwp_self return System.Address;
+ -- lwp_self does not exist on this thread library, revert to pthread_self
+ -- which is the closest approximation (with getpid). This function is
+ -- needed to share 7staprop.adb across POSIX-like targets.
+ pragma Import (C, lwp_self, "pthread_self");
+
-------------
-- Threads --
-------------
Index: b/src/gcc/ada/ChangeLog
===================================================================
--- a/src/gcc/ada/ChangeLog
+++ b/src/gcc/ada/ChangeLog
@@ -0,0 +1,6 @@
+2011-08-02 Ludovic Brenta <ludo...@ludovic-brenta.org>
+
+ PR ada/49940
+ * s-osinte-kfreebsd-gnu.ads (lwp_self): import pthread_self, as on
+ FreeBSD.
+
--
Ludovic Brenta.
