crosstool-ng: patches/gcc/4.2.4/310-sh-without-headers.patch@ff2181adbd28

cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

     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.

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

     6  1 file changed, 3 insertions(+)

     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.  */

    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.  */

    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 */

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sun Sep 12 23:51:25 2010 +0200 (2010-09-12)
changeset 2123	ff2181adbd28
permissions	-rw-r--r--