[Buildroot] [PATCH v2] ruby: fix 'pcrel too far' build problem on SuperH architectures

[Buildroot] [PATCH v2] ruby: fix 'pcrel too far' build problem on SuperH architectures

[Thomas De Schampheleire]

The 'pcrel too far' problem detected in the autobuild on SuperH
architectures, seems to be caused by the -Os optimization flag. Using
standard optimization fixes the problem.

Fixes http://autobuild.buildroot.net/results/bc36e051e06f596c2fafdd3cc3745bb34b73ace3/

Investigated-by: Lionel Orry <lionel.orry@gmail.com>
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>

---
v2: don't try to be smarter than you are (don't change TARGET_CFLAGS)

 package/ruby/ruby.mk |  7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/package/ruby/ruby.mk b/package/ruby/ruby.mk
--- a/package/ruby/ruby.mk
+++ b/package/ruby/ruby.mk
@@ -15,6 +15,13 @@ HOST_RUBY_CONF_OPT = --disable-install-d
 RUBY_LICENSE = Ruby or BSD-2c, BSD-3c, others
 RUBY_LICENSE_FILES = LEGAL COPYING BSDL
 
+# With some SuperH toolchains (like Sourcery CodeBench 2012.09), ruby fails to
+# build with 'pcrel too far'. This seems to be caused by the -Os option we pass
+# by default. To fix the problem, use standard -O2 optimization instead.
+ifeq ($(BR2_sh)$(BR2_sh64),y)
+RUBY_CONF_ENV += CFLAGS="$(TARGET_CFLAGS) -O2"
+endif
+
 # Force optionals to build before we do
 ifeq ($(BR2_PACKAGE_BERKELEYDB),y)
 	RUBY_DEPENDENCIES += berkeleydb