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>

 Matthias Kaehlcke <matthias at kaehlcke dot net> writes:

 A compilation of an ARM toolchain with glibc 2.7 using crosstool-ng

 failed with a gcc error in glibc-2.7/posix/regex_internal.c, more

 concretly in the function build_wcs_upper_buffer(). The return type of

 the function prototype in regex_internal.h doesn't correspond with the

 return type of this function in regex_internal.c.

 The attached patch corrects the return type of the function prototype

 in regex_internal.h

 --- glibc-2.7/posix/regex_internal.h.org	2008-05-30 11:16:01.000000000 +0200

 +++ glibc-2.7/posix/regex_internal.h	2008-05-30 11:16:35.000000000 +0200

 @@ -391,7 +391,7 @@

       internal_function;

  # ifdef RE_ENABLE_I18N

  static void build_wcs_buffer (re_string_t *pstr) internal_function;

 -static int build_wcs_upper_buffer (re_string_t *pstr) internal_function;

 +static reg_errcode_t build_wcs_upper_buffer (re_string_t *pstr) internal_function;

  # endif /* RE_ENABLE_I18N */

  static void build_upper_buffer (re_string_t *pstr) internal_function;

  static void re_string_translate_buffer (re_string_t *pstr) internal_function;