kbuild: pass -g to assembler under CONFIG_DEBUG_INFO

[firefly-linux-kernel-4.4.55.git] / Makefile

diff --git a/Makefile b/Makefile
index f2067e337d4d9513afde5c3a911edd1445ba3130..0ad6e8d9b0b3a04ed3d087bf3edd70fa5298146d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -115,7 +115,9 @@ saved-output := $(KBUILD_OUTPUT)
 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 $(if $(KBUILD_OUTPUT),, \
      $(error output directory "$(saved-output)" does not exist))
-
+# Check that OUTPUT directory is not the same as where we have kernel src
+$(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
+     $(error Output directory (O=...) specifies kernel src dir))
 PHONY += $(MAKECMDGOALS)
 
 $(filter-out _all,$(MAKECMDGOALS)) _all:
@@ -500,6 +502,7 @@ endif
 
 ifdef CONFIG_DEBUG_INFO
 CFLAGS         += -g
+AFLAGS         += -gdwarf-2
 endif
 
 # Force gcc to behave correct even for buggy distributions
@@ -863,7 +866,7 @@ ifneq ($(KBUILD_SRC),)
                /bin/false; \
        fi;
        $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
-       $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
+       $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
 endif
 
 # prepare2 creates a makefile if using a separate output directory
@@ -895,9 +898,9 @@ export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 # before switching between archs anyway.
 
 include/asm:
-       @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
+       @echo '  SYMLINK $@ -> include/asm-$(SRCARCH)'
        $(Q)if [ ! -d include ]; then mkdir -p include; fi;
-       @ln -fsn asm-$(ARCH) $@
+       @ln -fsn asm-$(SRCARCH) $@
 
 # Generate some files
 # ---------------------------------------------------------------------------
@@ -937,7 +940,8 @@ depend dep:
 INSTALL_HDR_PATH=$(objtree)/usr
 export INSTALL_HDR_PATH
 
-HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
+HDRFILTER=generic i386 x86_64
+HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 
 PHONY += headers_install_all
 headers_install_all: include/linux/version.h scripts_basic FORCE
@@ -948,11 +952,11 @@ headers_install_all: include/linux/version.h scripts_basic FORCE
 
 PHONY += headers_install
 headers_install: include/linux/version.h scripts_basic FORCE
-       @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
-         echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
+       @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
+         echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
          exit 1 ; fi
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
-       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
+       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
 
 PHONY += headers_check_all
 headers_check_all: headers_install_all
@@ -962,7 +966,7 @@ headers_check_all: headers_install_all
 
 PHONY += headers_check
 headers_check: headers_install
-       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
+       $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
 
 # ---------------------------------------------------------------------------
 # Modules
@@ -1140,7 +1144,7 @@ help:
        @echo  '  cscope          - Generate cscope index'
        @echo  '  kernelrelease   - Output the release version string'
        @echo  '  kernelversion   - Output the version stored in Makefile'
-       @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
+       @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
         echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
         fi
@@ -1148,7 +1152,7 @@ help:
        @echo  'Static analysers'
        @echo  '  checkstack      - Generate a list of stack hogs'
        @echo  '  namespacecheck  - Name space analysis on compiled kernel'
-       @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
+       @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
         echo  '  headers_check   - Sanity check on exported headers'; \
         fi
        @echo  ''
@@ -1254,8 +1258,10 @@ $(clean-dirs):
        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 
 clean: rm-dirs := $(MODVERDIR)
+clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
 clean: $(clean-dirs)
        $(call cmd,rmdirs)
+       $(call cmd,rmfiles)
        @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \