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/2.9/6016_all_alpha-glibc-2.5-no-asm-elf-header.patch

-= BEGIN original header =-

2007-03-13  Mike Frysinger  <vapier@gentoo.org>

	* sysdeps/unix/sysv/linux/alpha/sys/procfs.h: Copy some defines

	from alpha's asm/elf.h

-= END original header =-

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

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

+++ glibc-2_9/sysdeps/unix/sysv/linux/alpha/sys/procfs.h	2009-02-02 22:01:33.000000000 +0100

@@ -29,10 +29,23 @@

 #include <sys/types.h>

 #include <sys/ucontext.h>

 #include <sys/user.h>

-#include <asm/elf.h>

 __BEGIN_DECLS

+/*

+ * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long.

+ * I have no idea why that is so.  For now, we just leave it at 33

+ * (32 general regs + processor status word). 

+ */

+#define ELF_NGREG	33

+#define ELF_NFPREG	32

+

+typedef unsigned long elf_greg_t;

+typedef elf_greg_t elf_gregset_t[ELF_NGREG];

+

+typedef double elf_fpreg_t;

+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

+

 struct elf_siginfo

   {

     int si_signo;			/* Signal number.  */