SPL defines CONFIG_SPL_BUILD but this does not percolate to the autoconf.mk
Makefile.
As a result the build breaks when CONFIG_SPL_BUILD is used in the
board-specific include
header file. With this, there is a possibility of having a CONFIG option
defined in the
header file but not defined in the Makefile causing all kinds of build failure
and problems.
It also messes things for up, for example, when one might want to undefine
options to
keep the SPL small and doesn't want to be stuck with the CONFIG options used
for U-boot.
Lastly, this also avoids defining special CONFIG_SPL_ variables for cases where
some
options are required in U-boot but not in SPL.
We add a spl-autoconf.mk rule that is generated for SPL with the
CONFIG_SPL_BUILD flag
and conditionally include it for SPL builds.
v2 changes:
Fixed issue where builds in a different directory were failing.
Suggested-by: Muddegowda, Deepak x0171...@ti.com . Thanks Deepak!
Reported-by: Tom Rini tr...@ti.com
Signed-off-by: Joel A Fernandes joelag...@ti.com
Cc: Muddegowda, Deepak x0171...@ti.com
Cc: Tom Rini tr...@ti.com
---
Makefile | 19 +--
config.mk |6 ++
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index 6a30e04..e3a87e5 100644
--- a/Makefile
+++ b/Makefile
@@ -567,6 +567,7 @@ updater:
# Explicitly make _depend in subdirs containing multiple targets to prevent
# parallel sub-makes creating .depend files simultaneously.
depend dep:$(TIMESTAMP_FILE) $(VERSION_FILE) \
+ $(obj)include/spl-autoconf.mk \
$(obj)include/autoconf.mk \
$(obj)include/generated/generic-asm-offsets.h \
$(obj)include/generated/asm-offsets.h
@@ -632,12 +633,23 @@ $(obj)include/autoconf.mk: $(obj)include/config.h
sed -n -f tools/scripts/define2mk.sed $@.tmp \
mv $@.tmp $@
+# Auto-generate the spl-autoconf.mk file (which is included by all makefiles
for SPL)
+$(obj)include/spl-autoconf.mk: $(obj)include/config.h
+ @$(XECHO) Generating $@ ; \
+ set -e ; \
+ : Extract the config macros ; \
+ $(CPP) $(CFLAGS) -DCONFIG_SPL_BUILD -DDO_DEPS_ONLY -dM include/common.h
| \
+ sed -n -f tools/scripts/define2mk.sed $@.tmp \
+ mv $@.tmp $@
+
$(obj)include/generated/generic-asm-offsets.h: $(obj)include/autoconf.mk.dep \
+ $(obj)include/spl-autoconf.mk \
$(obj)lib/asm-offsets.s
@$(XECHO) Generating $@
tools/scripts/make-asm-offsets $(obj)lib/asm-offsets.s $@
$(obj)lib/asm-offsets.s: $(obj)include/autoconf.mk.dep \
+ $(obj)include/spl-autoconf.mk \
$(src)lib/asm-offsets.c
@mkdir -p $(obj)lib
$(CC) -DDO_DEPS_ONLY \
@@ -645,11 +657,13 @@ $(obj)lib/asm-offsets.s: $(obj)include/autoconf.mk.dep \
-o $@ $(src)lib/asm-offsets.c -c -S
$(obj)include/generated/asm-offsets.h: $(obj)include/autoconf.mk.dep \
+ $(obj)include/spl-autoconf.mk \
$(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
@$(XECHO) Generating $@
tools/scripts/make-asm-offsets $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s $@
-$(obj)$(CPUDIR)/$(SOC)/asm-offsets.s: $(obj)include/autoconf.mk.dep
+$(obj)$(CPUDIR)/$(SOC)/asm-offsets.s: $(obj)include/autoconf.mk.dep \
+ $(obj)include/spl-autoconf.mk
@mkdir -p $(obj)$(CPUDIR)/$(SOC)
if [ -f $(src)$(CPUDIR)/$(SOC)/asm-offsets.c ];then \
$(CC) -DDO_DEPS_ONLY \
@@ -711,7 +725,8 @@ include/license.h: tools/bin2header COPYING
unconfig:
@rm -f $(obj)include/config.h $(obj)include/config.mk \
$(obj)board/*/config.tmp $(obj)board/*/*/config.tmp \
- $(obj)include/autoconf.mk $(obj)include/autoconf.mk.dep
+ $(obj)include/autoconf.mk $(obj)include/autoconf.mk.dep \
+ $(obj)include/spl-autoconf.mk
%_config:: unconfig
@$(MKCONFIG) -A $(@:_config=)
diff --git a/config.mk b/config.mk
index 51b4783..3246c2c 100644
--- a/config.mk
+++ b/config.mk
@@ -153,7 +153,13 @@ DTC= dtc
#
# Load generated board configuration
+ifeq ($(CONFIG_SPL_BUILD),y)
+# Include SPL autoconf
+sinclude $(OBJTREE)/include/spl-autoconf.mk
+else
+# Include normal autoconf
sinclude $(OBJTREE)/include/autoconf.mk
+endif
sinclude $(OBJTREE)/include/config.mk
# Some architecture config.mk files need to know what CPUDIR is set to,
--
1.7.4.1
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