[Buildroot] [PATCH 1/1] gcc: Support configure option --with-linker-hash-style

["Stefan Fröberg" <stefan.froberg@petroprogram.com>]

This will set the default hash style that GCC will 
always use during linking.

Signed-off-by: Stefan Fr?berg <stefan.froberg@petroprogram.com>
---
 package/gcc/Config.in.host | 27 +++++++++++++++++++++++++++
 package/gcc/gcc.mk         | 12 ++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/package/gcc/Config.in.host b/package/gcc/Config.in.host
index 70cce0a5c5..b9391392e1 100644
--- a/package/gcc/Config.in.host
+++ b/package/gcc/Config.in.host
@@ -152,3 +152,30 @@ config BR2_GCC_ENABLE_GRAPHITE
 
 comment "graphite support needs gcc >= 5.x"
 	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_5
+
+choice 
+	prompt "Hash style used during linking"
+	default BR2_GCC_HASH_STYLE_GNU
+	help
+	  This tells GCC to pass --hash-style=choice option to the
+	  linker for all final links where choice can be one of
+	  "gnu", "sysv" or "both".
+	  Using "gnu" should give best application startup time.
+
+config BR2_GCC_HASH_STYLE_GNU
+	bool "gnu"
+	help
+	  For new style GNU ".gnu.hash" section.
+
+config BR2_GCC_HASH_STYLE_SYSV
+	bool "sysv"
+	help
+	  For classic ELF ".hash" section.
+
+config BR2_GCC_HASH_STYLE_BOTH
+	bool "both"
+	help
+	  For both the classic ELF ".hash" and
+	  new style GNU ".gnu.hash".
+
+endchoice	  
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk
index 27fc1e987c..51bb22d0e9 100644
--- a/package/gcc/gcc.mk
+++ b/package/gcc/gcc.mk
@@ -183,6 +183,18 @@ else
 HOST_GCC_COMMON_CONF_OPTS += --without-isl --without-cloog
 endif
 
+ifeq ((BR2_GCC_HASH_STYLE_GNU),y)
+HOST_GCC_COMMON_CONF_OPTS += --with-linker-hash-style=gnu
+endif
+
+ifeq ((BR2_GCC_HASH_STYLE_SYSV),y)
+HOST_GCC_COMMON_CONF_OPTS += --with-linker-hash-style=sysv
+endif
+
+ifeq ((BR2_GCC_HASH_STYLE_BOTH),y)
+HOST_GCC_COMMON_CONF_OPTS += --with-linker-hash-style=both
+endif
+
 ifeq ($(BR2_arc)$(BR2_or1k),y)
 HOST_GCC_COMMON_DEPENDENCIES += host-flex host-bison
 endif
-- 
2.13.6