Add support for running source code checkers on u-boot source, e.g.,
using sparse to aid with typechecking. This comes in especially
handy as SoC vendors mix and match cores and devices with different
endianness, thus here we add CHECK_ENDIAN to the otherwise linux
kernel default CHECKFLAGS.
Signed-off-by: Kim Phillips <kim.phill...@freescale.com>
---
Makefile | 18 ++++++++++++++++++
config.mk | 9 +++++++++
2 files changed, 27 insertions(+)
diff --git a/Makefile b/Makefile
index 058fb53..6969763 100644
--- a/Makefile
+++ b/Makefile
@@ -92,6 +92,24 @@ BUILD_DIR := $(O)
endif
endif
+# Call a source code checker (by default, "sparse") as part of the
+# C compilation.
+#
+# Use 'make C=1' to enable checking of re-compiled files.
+#
+# See the linux kernel file "Documentation/sparse.txt" for more details,
+# including where to get the "sparse" utility.
+
+ifdef C
+ifeq ("$(origin C)", "command line")
+CHECKSRC := $(C)
+endif
+endif
+ifndef CHECKSRC
+ CHECKSRC = 0
+endif
+export CHECKSRC
+
ifneq ($(BUILD_DIR),)
saved-output := $(BUILD_DIR)
diff --git a/config.mk b/config.mk
index c3822a2..e572902 100644
--- a/config.mk
+++ b/config.mk
@@ -148,6 +148,7 @@ OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
RANLIB = $(CROSS_COMPILE)RANLIB
DTC = dtc
+CHECK = sparse
#########################################################################
@@ -274,6 +275,10 @@ ifneq ($(CONFIG_SPL_TEXT_BASE),)
LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
endif
+# Linus' kernel sanity checking tool
+CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
+ -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
+
# Location of a usable BFD library, where we define "usable" as
# "built for ${HOST}, supports ${TARGET}". Sensible values are
# - When cross-compiling: the root of the cross-environment
@@ -321,6 +326,9 @@ $(obj)%.s: %.S
$(obj)%.o: %.S
$(CC) $(ALL_AFLAGS) -o $@ $< -c
$(obj)%.o: %.c
+ifneq ($(CHECKSRC),0)
+ $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
+endif
$(CC) $(ALL_CFLAGS) -o $@ $< -c
$(obj)%.i: %.c
$(CPP) $(ALL_CFLAGS) -o $@ $< -c
--
1.7.12
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