crosstool-ng: patches/gcc/4.4.0/190-flatten-switch-stmt-00.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 diff -durN gcc-4.4.0.orig/gcc/stmt.c gcc-4.4.0/gcc/stmt.c

     2 --- gcc-4.4.0.orig/gcc/stmt.c	2009-02-27 20:49:42.000000000 +0100

     3 +++ gcc-4.4.0/gcc/stmt.c	2009-05-27 21:38:21.000000000 +0200

     4 @@ -2376,7 +2376,11 @@

     5  	  use_cost_table

     6  	    = (TREE_CODE (orig_type) != ENUMERAL_TYPE

     7  	       && estimate_case_costs (case_list));

     8 -	  balance_case_nodes (&case_list, NULL);

     9 +	  /* When optimizing for size, we want a straight list to avoid

    10 +	     jumps as much as possible. This basically creates an if-else

    11 +	     chain.  */

    12 +	  if (!optimize_size)

    13 +	    balance_case_nodes (&case_list, NULL);

    14  	  emit_case_nodes (index, case_list, default_label, index_type);

    15  	  if (default_label)

    16  	    emit_jump (default_label);

    17 @@ -2942,6 +2946,7 @@

    18  	    {

    19  	      if (!node_has_low_bound (node, index_type))

    20  		{

    21 +		  if (!optimize_size) /* don't jl to the .default_label. */

    22  		  emit_cmp_and_jump_insns (index,

    23  					   convert_modes

    24  					   (mode, imode,

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--