build: convert frame_pointer to Kconfig

Converts the frame_pointer option to a Kconfig option.

Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/INSTALL b/INSTALL
index 35668bd8e15a137dbefdf4c77010c805cc6d109d..f55d42cc927ef5954848fa2102854646baf3c77c 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -230,7 +230,6 @@ hypervisor build.
 perfc=y
 perfc_arrays=y
 lock_profile=y
-frame_pointer=y
 lto=y
 
 During tools build external repos will be cloned into the source tree.

diff --git a/xen/Kconfig.debug b/xen/Kconfig.debug
index fb11c5675f67ed5a426ec2278d15e4e60b83020b..664a67b52f401fe0f078bd85f151a37c0ce9f5dc 100644 (file)
--- a/xen/Kconfig.debug
+++ b/xen/Kconfig.debug
@@ -20,6 +20,14 @@ config CRASH_DEBUG
          If you want to attach gdb to Xen to debug Xen if it crashes
          then say Y.
 
+config FRAME_POINTER
+       bool "Compile Xen with frame pointers"
+       default DEBUG
+       ---help---
+         If you say Y here the resulting Xen will be slightly larger and
+         maybe slower, but it gives very useful debugging information
+         in case of any Xen bugs.
+
 config VERBOSE_DEBUG
        bool "Verbose debug messages"
        default DEBUG

diff --git a/xen/Rules.mk b/xen/Rules.mk
index 2a93ef7d3f8a83008ec5ba55f0d5d3fff35046eb..418fc74f1f73198141a15393d60e6a0b718637ae 100644 (file)
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -6,7 +6,6 @@
 perfc         ?= n
 perfc_arrays  ?= n
 lock_profile  ?= n
-frame_pointer ?= n
 lto           ?= n
 
 -include $(BASEDIR)/include/config/auto.conf
@@ -15,9 +14,6 @@ include $(XEN_ROOT)/Config.mk
 
 # Hardcoded configuration implications and dependencies.
 # Do this is a neater way if it becomes unwieldy.
-ifeq ($(debug),y)
-frame_pointer := y
-endif
 ifeq ($(perfc_arrays),y)
 perfc := y
 endif
@@ -28,6 +24,9 @@ endif
 ifeq ($(origin debug),command line)
 $(warning "You must use 'make menuconfig' to enable/disable debug now.")
 endif
+ifneq ($(origin frame_pointer),undefined)
+$(error "You must use 'make menuconfig' to enable/disable frame_pointer now.")
+endif
 ifneq ($(origin kexec),undefined)
 $(error "You must use 'make menuconfig' to enable/disable kexec now.")
 endif
@@ -64,7 +63,7 @@ endif
 CFLAGS-$(perfc)         += -DPERF_COUNTERS
 CFLAGS-$(perfc_arrays)  += -DPERF_ARRAYS
 CFLAGS-$(lock_profile)  += -DLOCK_PROFILE
-CFLAGS-$(frame_pointer) += -fno-omit-frame-pointer -DCONFIG_FRAME_POINTER
+CFLAGS-$(CONFIG_FRAME_POINTER) += -fno-omit-frame-pointer
 
 ifneq ($(max_phys_irqs),)
 CFLAGS-y                += -DMAX_PHYS_IRQS=$(max_phys_irqs)