kernel/linux: fix using custom location

Currently, extract and patch are skipped as thus:
- using a custom directory of pre-installed headers
- a correctly named directory already exists

Otherwise, extract and patch are done.

The current second condition is wrong, because it allows the following
sequence to happen:
- a non-custom kernel is used
- a previous build only partially extracted the non-custom sources
- that p[revious build broke during extraction (eg. incomplete tarball...)
- a subsequent build will find a properly named directory, and will
thus skip extract and patch, which is wrong

Fix that by following the conditions in this table:

Type | Extract | Patch
----------------------+---------+-------
Pre-installed headers | N | N
custom directory | N | N
custom tarball | Y | N
mainstream tarball | Y | Y

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: David Holsgrove <david.holsgrove@xilinx.com>

2009-05-26  Aurelien Jarno  <aurelien@aurel32.net>

	* sysdeps/alpha/Makefile (CFLAGS-rtld.c): add $(PIC-ccflag).

 ports/sysdeps/alpha/Makefile |    3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff -durN glibc-2.13.orig/glibc-ports-2.13/sysdeps/alpha/Makefile glibc-2.13/glibc-ports-2.13/sysdeps/alpha/Makefile

--- glibc-2.13.orig/glibc-ports-2.13/sysdeps/alpha/Makefile	2009-05-16 10:36:20.000000000 +0200

+++ glibc-2.13/glibc-ports-2.13/sysdeps/alpha/Makefile	2009-11-13 00:51:13.000000000 +0100

@@ -35,7 +35,8 @@

 ifeq ($(subdir),elf)

 # The ld.so startup code cannot use literals until it self-relocates.

-CFLAGS-rtld.c = -mbuild-constants

+# It uses more than 64k for the small data area.

+CFLAGS-rtld.c = -mbuild-constants $(PIC-ccflag)

 endif

 # Build everything with full IEEE math support, and with dynamic rounding;

diff -durN glibc-2.13.orig/ports/sysdeps/alpha/Makefile glibc-2.13/ports/sysdeps/alpha/Makefile