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>

http://in3www.epfl.ch/~schaffne/glibc-configure-apple-as.patch

http://sources.redhat.com/ml/crossgcc/2004-02/msg00151.html

The following makes it possible to configure glibc-2.3.2 on Mac OS X,

where the assembler but doesn't understand the --version flag.

Fixes the symptom

checking whether ld is GNU ld... no

checking for /usr/libexec/gcc/darwin/ppc/as... /usr/libexec/gcc/darwin/ppc/as

checking version of /usr/libexec/gcc/darwin/ppc/as... 

<PAUSES HERE AND JUST SITS THERE DOING NOTHING>

--- glibc-2.3.2/configure~	Wed Feb 26 09:20:48 2003

+++ glibc-2.3.2/configure	Fri Feb 27 13:12:53 2004

@@ -4039,7 +4039,7 @@

   # Found it, now check the version.

   echo "$as_me:$LINENO: checking version of $AS" >&5

 echo $ECHO_N "checking version of $AS... $ECHO_C" >&6

-  ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`

+  ac_prog_version=`$AS -v </dev/null 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`

   case $ac_prog_version in

     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;

     2.1[3-9]*)

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>