[PATCH 6/6] symbols: centralize and re-arrange $(all_symbols) calculation

[Jan Beulich <jbeulich@xxxxxxxx>]

For one there's no need for each architecture to have the same logic.
Move to the root Makefile, also to calculate just once.

And then re-arrange to permit FAST_SYMBOL_LOOKUP to be independent of
LIVEPATCH, which may be useful in (at least) debugging.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Likely syms-warn-dup-y wants to follow suit; it doesn't even have an Arm
counterpart right now.

--- a/xen/Makefile
+++ b/xen/Makefile
@@ -460,6 +460,10 @@ ALL_OBJS-$(CONFIG_CRYPTO) += crypto/buil
 
 ALL_LIBS-y                := lib/lib.a
 
+all-symbols-y :=
+all-symbols-$(CONFIG_LIVEPATCH) += --all-symbols
+all-symbols-$(CONFIG_FAST_SYMBOL_LOOKUP) += --sort-by-name
+
 include $(srctree)/arch/$(SRCARCH)/arch.mk
 
 # define new variables to avoid the ones defined in Config.mk
@@ -612,7 +616,8 @@ $(TARGET): outputmakefile asm-generic FO
        $(Q)$(MAKE) $(build)=include all
        $(Q)$(MAKE) $(build)=arch/$(SRCARCH) include
        $(Q)$(MAKE) $(build)=. arch/$(SRCARCH)/include/asm/asm-offsets.h
-       $(Q)$(MAKE) $(build)=. MKRELOC=$(MKRELOC) 'ALL_OBJS=$(ALL_OBJS-y)' 
'ALL_LIBS=$(ALL_LIBS-y)' $@
+       $(Q)$(MAKE) $(build)=. MKRELOC=$(MKRELOC) 'ALL_OBJS=$(ALL_OBJS-y)' \
+                   'ALL_LIBS=$(ALL_LIBS-y)' 'all_symbols=$(all-symbols-y)' $@
 
 SUBDIRS = xsm arch common crypto drivers lib test
 define all_sources
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -81,15 +81,6 @@ ifneq ($(CONFIG_DTB_FILE),"")
 obj-y += dtb.o
 endif
 
-ifdef CONFIG_LIVEPATCH
-all_symbols = --all-symbols
-ifdef CONFIG_FAST_SYMBOL_LOOKUP
-all_symbols = --all-symbols --sort-by-name
-endif
-else
-all_symbols =
-endif
-
 $(TARGET): $(TARGET)-syms
        $(OBJCOPY) -O binary -S $< $@
 ifeq ($(CONFIG_ARM_64),y)
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -111,15 +111,6 @@ notes_phdrs = --notes
 endif
 endif
 
-ifdef CONFIG_LIVEPATCH
-all_symbols = --all-symbols
-ifdef CONFIG_FAST_SYMBOL_LOOKUP
-all_symbols = --all-symbols --sort-by-name
-endif
-else
-all_symbols =
-endif
-
 syms-warn-dup-y := --warn-dup
 syms-warn-dup-$(CONFIG_SUPPRESS_DUPLICATE_SYMBOL_WARNINGS) :=
 syms-warn-dup-$(CONFIG_ENFORCE_UNIQUE_SYMBOLS) := --error-dup