conf,recipes: Add new variable LINKER_HASH_STYLE

LINKER_HASH_STYLE in OE is set to either 'sysv' or 'gnu'
depending upon processor architecture e.g. mips does not support
gnu hash style so is uses sysv

besides 'sysv' and 'gnu' third option is to set it to 'both' we do
not do that by default but user can still set it

(From OE-Core rev: 17322dba8434e592d3922496f89f8d1d5598247e)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/bitbake.conf

@@ -476,7 +476,14 @@ BUILDSDK_LDFLAGS = "-L${STAGING_LIBDIR} \
                     -Wl,-rpath-link,${STAGING_DIR_HOST}${base_libdir} \
                     -Wl,-rpath,${base_libdir} -Wl,-O1"
 
-TARGET_LINK_HASH_STYLE ??= ""
+LINKER_HASH_STYLE ??= "gnu"
+# mips does not support GNU hash style therefore we override
+LINKER_HASH_STYLE_mips = "sysv"
+LINKER_HASH_STYLE_mipsel = "sysv"
+LINKER_HASH_STYLE_mips64 = "sysv"
+LINKER_HASH_STYLE_mips64el = "sysv"
+TARGET_LINK_HASH_STYLE ?= "${@['-Wl,--hash-style=gnu',''][bb.data.getVar('LINKER_HASH_STYLE', d, True) == 'gnu']}"
+
 export LDFLAGS = "${TARGET_LDFLAGS}"
 export TARGET_LDFLAGS = "-Wl,-O1 ${TARGET_LINK_HASH_STYLE}"
 #export TARGET_LDFLAGS = "-L${STAGING_DIR_TARGET}${libdir} \

meta/conf/distro/include/tcmode-default.inc

@@ -63,5 +63,4 @@ PREFERRED_VERSION_gzip-native ?= "1.4"
 
 # Setup suitable toolchain flags
 require conf/distro/include/as-needed.inc
-TARGET_LINK_HASH_STYLE ?= "${@['-Wl,--hash-style=gnu',''][bb.data.getVar('TARGET_ARCH', d, True) in ['mips', 'mipsel', 'mips64', 'mips64el']]}"