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://bugs.gentoo.org/196245

http://sourceware.org/ml/libc-alpha/2006-05/msg00017.html

Attached is a patch to add __attribute__ ((noinline)) to

call_gmon_start.

Without this patch, the sec script that processed initfini.s removes a

part of inlined call_gmon_start, causing undefined label errors.

This patch solves the problem by forcing gcc not to inline

call_gmon_start with __attribute__ ((noinline)).

Tested by building for arm-none-lixux-gnueabi.  OK to apply?

Kazu Hirata

2006-05-07  Kazu Hirata  <kazu@codesourcery.com>

	* sysdeps/generic/initfini.c (call_gmon_start): Add

	__attribute__ ((noinline)).

Index: sysdeps/generic/initfini.c

===================================================================

diff -durN glibc-2.10.1.orig/sysdeps/generic/initfini.c glibc-2.10.1/sysdeps/generic/initfini.c

--- glibc-2.10.1.orig/sysdeps/generic/initfini.c	2007-06-17 20:02:40.000000000 +0200

+++ glibc-2.10.1/sysdeps/generic/initfini.c	2009-11-13 00:50:09.000000000 +0100

@@ -70,7 +70,7 @@

 /* The beginning of _init:  */

 asm ("\n/*@_init_PROLOG_BEGINS*/");

-static void

+static void __attribute__ ((noinline))

 call_gmon_start(void)

 {

   extern void __gmon_start__ (void) __attribute__ ((weak)); /*weak_extern (__gmon_start__);*/