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patches/gcc/4.3.2/350-sh-without-headers.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jun 13 23:45:29 2010 +0200 (2010-06-13)
changeset 1982 63cee3d5ab85
permissions -rw-r--r--
libc/newlib: build in the 'start files' pass

A few facts:
- building the C library requires a proper core compiler
- core compiler is issued from one of the core passes
- the C library is required to build libstdc++
- newlib is only built for baremetal
- in bare metal, the final compiler is issued from one of the core passes

So we need to build the C library between core pass 1 and core pass 2.
The only place is eithe libc_headers() or libc_start_files(). The most
pertinent seems to be libc_start_files().

So we build newlib from libc_start_files(), and leave libc() empty. 
     1 On 20081011, Khem RAJ writes:

     2  You have to bar gcc trying to build unwinding at stage 1. Try the

     3  attached patch and see if it helps.

     4 

     5  gcc/config/sh/linux-unwind.h |    3 +++

     6  1 file changed, 3 insertions(+)

     7 

     8 Index: gcc-4_2-branch/gcc/config/sh/linux-unwind.h

     9 ===================================================================

    10 --- gcc-4_2-branch.orig/gcc/config/sh/linux-unwind.h	2008-07-01 17:24:40.000000000 -0700

    11 +++ gcc-4_2-branch/gcc/config/sh/linux-unwind.h	2008-07-01 17:25:47.000000000 -0700

    12 @@ -26,6 +26,8 @@ along with this program; see the file CO

    13  the Free Software Foundation, 51 Franklin Street, Fifth Floor,

    14  Boston, MA 02110-1301, USA.  */

    15  

    16 +#ifndef inhibit_libc

    17 +

    18  /* Do code reading to identify a signal frame, and set the frame

    19     state data appropriately.  See unwind-dw2.c for the structs.  */

    20  

    21 @@ -251,3 +253,4 @@ sh_fallback_frame_state (struct _Unwind_

    22    return _URC_NO_REASON;

    23  }

    24  #endif /* defined (__SH5__) */

    25 +#endif /* ifndef inhibit_libc */

    26
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