NPTL patch for crosstool-0.40

["Robert P. J. Day" <rpjday at mindspring dot com>]

URL:  http://dev.gentoo.org/~halcy0n/glibc/patches/5070_all_cross-compile-nptl.patch
ML: http://www.nabble.com/Re%3A-how-to-implement-conditional-patches--p1795571.html

A little hack for cross-compiling NPTL w/out linuxthreads.  Can be applied
to both glibc-2.3.5 and glibc-2.3.6, at the very least.

--- libc/nptl/sysdeps/pthread/configure.in
+++ libc/nptl/sysdeps/pthread/configure.in
@@ -28,6 +28,9 @@
 struct _Unwind_Context *context;
 _Unwind_GetCFA (context)],
 libc_cv_forced_unwind=yes, libc_cv_forced_unwind=no)])
+if test $libc_cv_forced_unwind = no -a $build_cpu != $host_cpu; then
+  libc_cv_forced_unwind=yes
+fi
 if test $libc_cv_forced_unwind = yes; then
   AC_DEFINE(HAVE_FORCED_UNWIND)
 dnl Check for C cleanup handling.
@@ -41,6 +44,9 @@
   puts ("test")],
 libc_cv_c_cleanup=yes, libc_cv_c_cleanup=no)])
   CFLAGS="$old_CFLAGS"
+  if test $libc_cv_c_cleanup = no -a $build_cpu != $host_cpu; then
+    libc_cv_c_cleanup=yes
+  fi
   if test $libc_cv_c_cleanup = no; then
     AC_MSG_ERROR([the compiler must support C cleanup handling])
   fi
--- libc/nptl/sysdeps/pthread/configure
+++ libc/nptl/sysdeps/pthread/configure
@@ -81,6 +81,10 @@
 fi
 echo "$as_me:$LINENO: result: $libc_cv_forced_unwind" >&5
 echo "${ECHO_T}$libc_cv_forced_unwind" >&6
+if test $libc_cv_forced_unwind = no -a $build_cpu != $host_cpu; then
+  echo "$as_me:$LINENO: forcing libc_cv_forced_unwind = yes for cross-compile"
+  libc_cv_forced_unwind=yes
+fi
 if test $libc_cv_forced_unwind = yes; then
   cat >>confdefs.h <<\_ACEOF
 #define HAVE_FORCED_UNWIND 1
@@ -147,6 +151,10 @@
 echo "$as_me:$LINENO: result: $libc_cv_c_cleanup" >&5
 echo "${ECHO_T}$libc_cv_c_cleanup" >&6
   CFLAGS="$old_CFLAGS"
+  if test $libc_cv_c_cleanup = no -a $build_cpu != $host_cpu; then
+    echo "$as_me:$LINENO: result: forcing libc_cv_c_cleanup = yes for cross-compile"
+    libc_cv_c_cleanup=yes
+  fi
   if test $libc_cv_c_cleanup = no; then
     { { echo "$as_me:$LINENO: error: the compiler must support C cleanup handling" >&5
 echo "$as_me: error: the compiler must support C cleanup handling" >&2;}

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>

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