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 glibc-2.12.1.orig/elf/elf.h glibc-2.12.1/elf/elf.h

--- glibc-2.12.1.orig/elf/elf.h	2009-04-15 02:15:54.000000000 +0200

+++ glibc-2.12.1/elf/elf.h	2009-11-13 00:50:35.000000000 +0100

@@ -580,6 +580,7 @@

 #define PT_GNU_EH_FRAME	0x6474e550	/* GCC .eh_frame_hdr segment */

 #define PT_GNU_STACK	0x6474e551	/* Indicates stack executability */

 #define PT_GNU_RELRO	0x6474e552	/* Read-only after relocation */

+#define PT_PAX_FLAGS	0x65041580	/* Indicates PaX flag markings */

 #define PT_LOSUNW	0x6ffffffa

 #define PT_SUNWBSS	0x6ffffffa	/* Sun Specific segment */

 #define PT_SUNWSTACK	0x6ffffffb	/* Stack segment */

@@ -593,6 +594,18 @@

 #define PF_X		(1 << 0)	/* Segment is executable */

 #define PF_W		(1 << 1)	/* Segment is writable */

 #define PF_R		(1 << 2)	/* Segment is readable */

+#define PF_PAGEEXEC	(1 << 4)	/* Enable  PAGEEXEC */

+#define PF_NOPAGEEXEC	(1 << 5)	/* Disable PAGEEXEC */

+#define PF_SEGMEXEC	(1 << 6)	/* Enable  SEGMEXEC */

+#define PF_NOSEGMEXEC	(1 << 7)	/* Disable SEGMEXEC */

+#define PF_MPROTECT	(1 << 8)	/* Enable  MPROTECT */

+#define PF_NOMPROTECT	(1 << 9)	/* Disable MPROTECT */

+#define PF_RANDEXEC	(1 << 10)	/* Enable  RANDEXEC */

+#define PF_NORANDEXEC	(1 << 11)	/* Disable RANDEXEC */

+#define PF_EMUTRAMP	(1 << 12)	/* Enable  EMUTRAMP */

+#define PF_NOEMUTRAMP	(1 << 13)	/* Disable EMUTRAMP */

+#define PF_RANDMMAP	(1 << 14)	/* Enable  RANDMMAP */

+#define PF_NORANDMMAP	(1 << 15)	/* Disable RANDMMAP */

 #define PF_MASKOS	0x0ff00000	/* OS-specific */

 #define PF_MASKPROC	0xf0000000	/* Processor-specific */