From fad8d6b6c0290e92b89cd18493c0c336f3619ee1 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Tue, 15 Dec 2020 18:39:05 +0100 Subject: build system: combat gcc zealotry in data alignment, now for x86_64 too function old new delta .rodata 182928 182620 -308 Signed-off-by: Denys Vlasenko --- arch/x86_64/Makefile | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 arch/x86_64/Makefile (limited to 'arch/x86_64') diff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile new file mode 100644 index 000000000..16576fb81 --- /dev/null +++ b/arch/x86_64/Makefile @@ -0,0 +1,11 @@ +# ========================================================================== +# Build system +# ========================================================================== + +# "Control how GCC aligns variables. +# Supported values for type are compat uses increased alignment value +# compatible uses GCC 4.8 and earlier, abi uses alignment value as specified by the psABI, +# and cacheline uses increased alignment value to match the cache line size. +# compat is the default." +# "abi" seems to be somewhat successful in preventing oversealous data alignment. +CFLAGS += $(call cc-option,-malign-data=abi,) -- cgit v1.2.3