Re: Don't define USE_PT_GNU_EH_FRAME when using uClibc

[Jie Zhang <jzhang918 at gmail dot com>]

David Daney wrote:
> Jie Zhang wrote:
> > When building a cross compiler with --with-sysroot option,
> > inhibit_libc is not defined. GCC checks if PT_GNU_EH_FRAME can be used
>
> I think a better option is to defind inhibit_libc for uClibc.
When I searched the mailing list, I found this
<http://gcc.gnu.org/ml/gcc-patches/2003-05/msg02068.html>.
If we define inhibit_libc for uClibc as we did for newlib before, 
-fprofile-arcs / -fbranch-probabilities maybe cannot be used with uClibc.

> Attached is a patch I am using with 3.4.3, that I am going to try to 
> submit for 4.3 when it goes back to stage 1.
> +if { { test x$host != x$target && test "x$with_sysroot" = x && test 
x$target_os != "xlinux-uclibc"; } ||

I don't know if configure in gcc checks what C library is used when 
building GCC and change *-*-linux into *-*-linux-uclibc. For bfin port, 
since uClibc is the only supported C library on uClinux, we usually just 
configure it with --target=bfin-uclinux. If configure does not check the 
C library, this test will not work.

Jie