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>

diff -durN gcc-4.3.1.orig/gcc/config/arm/linux-elf.h gcc-4.3.1/gcc/config/arm/linux-elf.h

--- gcc-4.3.1.orig/gcc/config/arm/linux-elf.h	2007-11-08 14:44:09.000000000 +0100

+++ gcc-4.3.1/gcc/config/arm/linux-elf.h	2008-07-23 15:30:57.000000000 +0200

@@ -60,7 +60,7 @@

    %{shared:-lc} \

    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"

-#define LIBGCC_SPEC "%{msoft-float:-lfloat} %{mfloat-abi=soft*:-lfloat} -lgcc"

+#define LIBGCC_SPEC "-lgcc"

 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"

diff -durN gcc-4.3.1.orig/gcc/config/arm/t-linux gcc-4.3.1/gcc/config/arm/t-linux

--- gcc-4.3.1.orig/gcc/config/arm/t-linux	2006-11-09 23:14:27.000000000 +0100

+++ gcc-4.3.1/gcc/config/arm/t-linux	2008-07-23 19:15:25.000000000 +0200

@@ -3,7 +3,12 @@

 TARGET_LIBGCC2_CFLAGS = -fomit-frame-pointer -fPIC

 LIB1ASMSRC = arm/lib1funcs.asm

-LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx

+LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func \

+	_call_via_rX _interwork_call_via_rX \

+	_lshrdi3 _ashrdi3 _ashldi3 \

+	_negdf2 _addsubdf3 _muldivdf3 _cmpdf2 _unorddf2 _fixdfsi _fixunsdfsi \

+	_truncdfsf2 _negsf2 _addsubsf3 _muldivsf3 _cmpsf2 _unordsf2 \

+	_fixsfsi _fixunssfsi _floatdidf _floatdisf _floatundidf _floatundisf

 # MULTILIB_OPTIONS = mhard-float/msoft-float

 # MULTILIB_DIRNAMES = hard-float soft-float