patches/binutils/2.20/290-ld-stub-crash.patch
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--
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>
jocke@1700
     1
diff -p -c -u -r1.196 elf32-arm.c
jocke@1700
     2
--- a/bfd/elf32-arm.c	22 May 2009 11:58:44 -0000	1.196
jocke@1700
     3
+++ b/bfd/elf32-arm.c	12 Jun 2009 13:18:20 -0000
jocke@1700
     4
@@ -3175,11 +3175,15 @@ arm_type_of_stub (struct bfd_link_info *
jocke@1700
     5
 
jocke@1700
     6
 	  /* We have an extra 2-bytes reach because of
jocke@1700
     7
 	     the mode change (bit 24 (H) of BLX encoding).  */
jocke@1700
     8
+	  /* A stub is needed only if this call is not throught a PLT
jocke@1700
     9
+	     entry, because PLT stubs handle mode switching
jocke@1700
    10
+	     already.  */
jocke@1700
    11
 	  if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2)
jocke@1700
    12
 	      || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)
jocke@1700
    13
-	      || ((r_type == R_ARM_CALL) && !globals->use_blx)
jocke@1700
    14
-	      || (r_type == R_ARM_JUMP24)
jocke@1700
    15
-	      || (r_type == R_ARM_PLT32))
jocke@1700
    16
+	      || ( (((r_type == R_ARM_CALL) && !globals->use_blx)
jocke@1700
    17
+		    || (r_type == R_ARM_JUMP24)
jocke@1700
    18
+		    || (r_type == R_ARM_PLT32))
jocke@1700
    19
+		   && !use_plt))
jocke@1700
    20
 	    {
jocke@1700
    21
 	      stub_type = (info->shared | globals->pic_veneer)
jocke@1700
    22
 		/* PIC stubs.  */