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>

 2007-02-15  Khem Raj  <kraj@xxxxxxxxxx>

        * sysdeps/unix/sysv/linux/i386/sysdep.h: Re-define __i686.

        * nptl/sysdeps/pthread/pt-initfini.c: Ditto.

 Index: glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h

 ===================================================================

 --- glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h	(revision 1469)

 +++ glibc-2.4/sysdeps/unix/sysv/linux/i386/sysdep.h	(working copy)

 @@ -29,6 +29,10 @@

  #include <dl-sysdep.h>

  #include <tls.h>

 +#if defined __i686 && defined __ASSEMBLER__

 +#undef __i686

 +#define __i686 __i686

 +#endif

  /* For Linux we can use the system call table in the header file

  	/usr/include/asm/unistd.h

 Index: glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c

 ===================================================================

 --- glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c	(revision 1469)

 +++ glibc-2.4/nptl/sysdeps/pthread/pt-initfini.c	(working copy)

 @@ -45,6 +45,11 @@

  /* Embed an #include to pull in the alignment and .end directives. */

  asm ("\n#include \"defs.h\"");

 +asm ("\n#if defined __i686 && defined __ASSEMBLER__");

 +asm ("\n#undef __i686");

 +asm ("\n#define __i686 __i686");

 +asm ("\n#endif");

 +

  /* The initial common code ends here. */

  asm ("\n/*@HEADER_ENDS*/");