[Bug 3193] Need to use CFI_ wrappers to build NPTL with gcc 4.2.1/binutils 2.17

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=3193

Carmelo Amoroso <carmelo.amoroso at st.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED

--- Comment #1 from Carmelo Amoroso <carmelo.amoroso at st.com>  ---
Hi Rob,
I've checked it further and both .cfi_personality and .cfi_lsda are already
wrapped by the corresponding macros.

The problem is that, by default, on i386 the macro
__UCLIBC_HAVE_ASM_CFI_DIRECTIVES__ is defined (see the
__uClibc_arch_features.h), to the corresponding macro HAVE_ASM_CFI_DIRECTIVES
is also enabled.

As a temporary w/a you should just #undef it.

As a general fix, I'd suggest to have an config option
__UCLIBC_USE_ASM_CFI_DIRECTIVES__ that the user can enable/disable has he
likes,

libc-symbols shoudl do something like this:

#if defined __UCLIBC_HAVE_ASM_CFI_DIRECTIVES__ && defined
__UCLIBC_USE_ASM_CFI_DIRECTIVES__

#define HAVE_ASM_CFI_DIRECTIVES
#else
#undef HAVE_ASM_CFI_DIRECTIVES
#endif

It is similar to ARCH_HAS_MMU and ARCH_USE_MMU.

Comments ?

Cheers,
Carmelo

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