complibs/cloog: fix linking with libm

In Ubuntu 11.04 and 11.10, the default options for ld have changed.
--no-copy-dt-needed-entries and --as-needed are now enabled by default, which
causes errors like:

[EXTRA] Checking CLooG/ppl
[DEBUG] ==> Executing: 'make' '-j3' '-s' 'check'
[ALL ] Making check in .
[ALL ] config.status: creating include/cloog/cloog-config.h
[ALL ] config.status: include/cloog/cloog-config.h is unchanged
[ALL ] libtool: link: i686-build_pc-linux-gnu-gcc -Wall -fomit-frame-pointer
-pipe -o cloog cloog.o -L/<snip>/build/static/lib ./.libs/libcloog.a -lm
/<snip>/build/static/lib/libppl_c.a /<snip>/build/static/lib/libpwl.a
/<snip>/build/static/lib/libppl.a /<snip>/build/static/lib/libgmpxx.a
/<snip>/build/static/lib/libgmp.a -lstdc++
[ALL ] /usr/bin/ld: /<snip>/build/static/lib/libppl.a(MIP_Problem.o):
undefined reference to symbol 'sqrt@@GLIBC_2.0'
[ALL ] /usr/bin/ld: note: 'sqrt@@GLIBC_2.0' is defined in DSO
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so so try adding
it to the linker command line
[ALL ] /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so:
could not read symbols: Invalid operation
[ALL ] collect2: ld returned 1 exit status
[ERROR] make[2]: *** [cloog] Error 1
[ERROR] make[1]: *** [check-recursive] Error 1

See:
https://wiki.ubuntu.com/NattyNarwhal/ToolchainTransition

This patch fixes these errors by placing '-lm' at the right place on the command
line as libppl requires libm when linking cloog.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>

Original patch from: gentoo/src/patchsets/glibc/2.9/6015_all_alpha-glibc-2.5-no-page-header.patch

-= BEGIN original header =-

2008-06-07  Mike Frysinger  <vapier@gentoo.org>

	* sysdeps/unix/sysv/linux/alpha/sys/user.h: Copy page.h definitions

	from the kernel header to sys/user.h and remove the #include of

	sys/user.h.

-= END original header =-

diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/alpha/sys/user.h glibc-2_9/sysdeps/unix/sysv/linux/alpha/sys/user.h

--- glibc-2_9.orig/sysdeps/unix/sysv/linux/alpha/sys/user.h	2001-07-06 06:56:13.000000000 +0200

+++ glibc-2_9/sysdeps/unix/sysv/linux/alpha/sys/user.h	2009-02-02 22:01:32.000000000 +0100

@@ -23,7 +23,6 @@

    only. Don't read too much into it. Don't use it for anything other

    than gdb/strace unless you know what you are doing. */

-#include <asm/page.h>

 #include <asm/reg.h>

 struct user

@@ -41,6 +40,9 @@

   char u_comm[32];				/* user command name */

 };

+#define PAGE_SHIFT		13

+#define PAGE_SIZE		(1 << PAGE_SHIFT)

+#define PAGE_MASK		(~(PAGE_SIZE-1))

 #define NBPG			PAGE_SIZE

 #define UPAGES			1

 #define HOST_TEXT_START_ADDR	(u.start_code)