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>

 By Lennert Buytenhek <buytenh@wantstofly.org>

 Adds support for arm*b-linux* big-endian ARM targets

 See http://gcc.gnu.org/PR16350

 diff -durN gcc-4.4.4.orig/gcc/config/arm/linux-elf.h gcc-4.4.4/gcc/config/arm/linux-elf.h

 --- gcc-4.4.4.orig/gcc/config/arm/linux-elf.h	2009-02-20 16:20:38.000000000 +0100

 +++ gcc-4.4.4/gcc/config/arm/linux-elf.h	2010-05-16 19:38:07.000000000 +0200

 @@ -51,7 +51,7 @@

  #undef  MULTILIB_DEFAULTS

  #define MULTILIB_DEFAULTS \

 -	{ "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" }

 +	{ "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" }

  /* Now we define the strings used to build the spec file.  */

  #undef  LIB_SPEC

 diff -durN gcc-4.4.4.orig/gcc/config.gcc gcc-4.4.4/gcc/config.gcc

 --- gcc-4.4.4.orig/gcc/config.gcc	2010-05-16 19:36:15.000000000 +0200

 +++ gcc-4.4.4/gcc/config.gcc	2010-05-16 19:38:07.000000000 +0200

 @@ -733,6 +733,11 @@

  	tm_file="dbxelf.h elfos.h arm/unknown-elf.h arm/elf.h arm/linux-gas.h arm/uclinux-elf.h"

  	tmake_file="arm/t-arm arm/t-arm-elf"

  	case ${target} in

 +	arm*b-*)

 +		tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"

 +		;;

 +	esac

 +	case ${target} in

  	arm*-*-uclinux*eabi)

  	    tm_file="$tm_file arm/bpabi.h arm/uclinux-eabi.h"

  	    tmake_file="$tmake_file arm/t-bpabi"