x86/build: Remove jump label quirk for GCC older than 4.5.2

Commit 46ed35d9f3fa ("Raise the minimum required gcc version to 4.6")
bumped the minimum GCC version to 4.6 for all architectures.

Remove the workaround code.

It was the only user of cc-if-fullversion.  Remove the macro as well.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
Link: https://lkml.kernel.org/r/1535348714-25457-1-git-send-email-yamada.masahiro@socionext.com

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 94859241bc3eada03292e25362649b226511f872..8fc8f94ef5f54a8f3b9360bc51b715177429e9a0 100644 (file)
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -179,18 +179,6 @@ ifndef CC_HAVE_ASM_GOTO
   $(error Compiler lacks asm-goto support.)
 endif
 
-#
-# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a
-# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226).  There's no way
-# to test for this bug at compile-time because the test case needs to execute,
-# which is a no-go for cross compilers.  So check the GCC version instead.
-#
-ifdef CONFIG_JUMP_LABEL
-  ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1)
-       ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1)
-  endif
-endif
-
 ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
        # This compiler flag is not supported by Clang:
        KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index c75413d05a630cbb8111857b927cb8b0202c5432..ce53639a864a14fa13d85710af4b875fd477217f 100644 (file)
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -153,10 +153,6 @@ cc-fullversion = $(shell $(CONFIG_SHELL) \
 # Usage:  EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
 cc-ifversion = $(shell [ $(cc-version) $(1) $(2) ] && echo $(3) || echo $(4))
 
-# cc-if-fullversion
-# Usage:  EXTRA_CFLAGS += $(call cc-if-fullversion, -lt, 040502, -O1)
-cc-if-fullversion = $(shell [ $(cc-fullversion) $(1) $(2) ] && echo $(3) || echo $(4))
-
 # cc-ldoption
 # Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
 cc-ldoption = $(call try-run,\