[backport proposed fix for PR47230 bootstrap failure on alpha-linux <mikpe@it.uu.se>]

Date: Mon, 2 May 2011 09:21:27 +0200
Subject: [PATCH, alpha]: Fix PR/47230 [4.6/4.7 Regression] gcc fails to bootstrap on alpha in stage2 with "relocation truncated to fit: GPREL16 against ..."
From: Uros Bizjak <ubizjak at gmail dot com>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>

Hello!

It looks that GP relative relocations do not fit anymore into GPREL16
reloc, so bootstrap on alpha hosts fail in stage2 with  "relocation
truncated to fit: GPREL16 against ...". I found no other solution but
to pass --no-relax to linker in order to finish the bootstrap.

2011-05-02  Uros Bizjak  <ubizjak@gmail.com>

	PR target/47230
	* configure.ac (alpha*-*-linux*): Use mh-alpha-linux.
	* configure: Regenerate.

config/ChangeLog:

2011-05-02  Uros Bizjak  <ubizjak@gmail.com>

	PR target/47230
	* mh-alpha-linux: New file.

Patch was bootstrapped and regression tested with "GNU ld (GNU
Binutils) 2.21" on alphaev68-pc-linux-gnu [1].

OK for 4.6. and 4.7 ?

[1] http://gcc.gnu.org/ml/gcc-testresults/2011-05/msg00089.html

Uros.

--- gcc-4.6.2/config/mh-alpha-linux.~1~	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.6.2/config/mh-alpha-linux	2011-11-19 21:15:03.000000000 +0100
@@ -0,0 +1,3 @@
+# Prevent GPREL16 relocation truncation
+LDFLAGS += -Wl,--no-relax
+BOOT_LDFLAGS += -Wl,--no-relax
--- gcc-4.6.2/configure.ac.~1~	2011-06-27 22:54:59.000000000 +0200
+++ gcc-4.6.2/configure.ac	2011-11-19 21:15:03.000000000 +0100
@@ -1197,6 +1197,9 @@ case "${host}" in
     # without overflowing the jump tables (-J says to use a 32 bit table)
     tentative_cc="cc -J"
     ;;
+  alpha*-*-linux*)
+    host_makefile_frag="config/mh-alpha-linux"
+    ;;
   hppa*-hp-hpux10*)
     tentative_cc="cc -Wp,-H256000"
     host_makefile_frag="config/mh-pa-hpux10"
--- gcc-4.6.2/configure.~1~	2011-06-27 22:54:59.000000000 +0200
+++ gcc-4.6.2/configure	2011-11-19 21:15:03.000000000 +0100
@@ -3770,6 +3770,9 @@ fi
     # without overflowing the jump tables (-J says to use a 32 bit table)
     tentative_cc="cc -J"
     ;;
+  alpha*-*-linux*)
+    host_makefile_frag="config/mh-alpha-linux"
+    ;;
   hppa*-hp-hpux10*)
     tentative_cc="cc -Wp,-H256000"
     host_makefile_frag="config/mh-pa-hpux10"