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Makefile: Add build time and compiler info string

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When we are doing opensbi development, we want to know the build time
and compiler info for debug purpose.

To enable this message, please add "BUILD_INFO=y", like:

```
make BUILD_INFO=y
```

NOTE: Using `BUILD_INFO=y` without specifying SOURCE_DATE_EPOCH will
violate "reproducible builds". So it's ONLY for development and debug
purpose, and should NOT be used in a product which follows "reproducible
builds".

Signed-off-by: Wei Fu <wefu@redhat.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Wei Fu
2021-09-30 18:11:20 +08:00
committed by Anup Patel
parent 67cbbcb100
commit 422eda499c
3 changed files with 63 additions and 0 deletions
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31
Makefile
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@@ -150,6 +150,25 @@ endif
# Check whether the linker supports creating PIEs
OPENSBI_LD_PIE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) $(USE_LD_FLAG) -fPIE -nostdlib -Wl,-pie -x c /dev/null -o /dev/null >/dev/null 2>&1 && echo y || echo n)
# Build Info:
# OPENSBI_BUILD_TIME_STAMP -- the compilation time stamp
# OPENSBI_BUILD_COMPILER_VERSION -- the compiler version info
BUILD_INFO ?= n
ifeq ($(BUILD_INFO),y)
OPENSBI_BUILD_DATE_FMT = +%Y-%m-%d %H:%M:%S %z
ifdef SOURCE_DATE_EPOCH
OPENSBI_BUILD_TIME_STAMP ?= $(shell date -u -d "@$(SOURCE_DATE_EPOCH)" \
"$(OPENSBI_BUILD_DATE_FMT)" 2>/dev/null || \
date -u -r "$(SOURCE_DATE_EPOCH)" \
"$(OPENSBI_BUILD_DATE_FMT)" 2>/dev/null || \
date -u "$(OPENSBI_BUILD_DATE_FMT)")
else
OPENSBI_BUILD_TIME_STAMP ?= $(shell date "$(OPENSBI_BUILD_DATE_FMT)")
endif
OPENSBI_BUILD_COMPILER_VERSION=$(shell $(CC) -v 2>&1 | grep ' version ' | \
sed 's/[[:space:]]*$$//')
endif
# Setup list of objects.mk files
ifdef PLATFORM
platform-object-mks=$(shell if [ -d $(platform_src_dir)/ ]; then find $(platform_src_dir) -iname "objects.mk" | sort -r; fi)
@@ -247,6 +266,10 @@ GENFLAGS += -I$(include_dir)
ifneq ($(OPENSBI_VERSION_GIT),)
GENFLAGS += -DOPENSBI_VERSION_GIT="\"$(OPENSBI_VERSION_GIT)\""
endif
ifeq ($(BUILD_INFO),y)
GENFLAGS += -DOPENSBI_BUILD_TIME_STAMP="\"$(OPENSBI_BUILD_TIME_STAMP)\""
GENFLAGS += -DOPENSBI_BUILD_COMPILER_VERSION="\"$(OPENSBI_BUILD_COMPILER_VERSION)\""
endif
GENFLAGS += $(libsbiutils-genflags-y)
GENFLAGS += $(platform-genflags-y)
GENFLAGS += $(firmware-genflags-y)
@@ -398,6 +421,11 @@ $(build_dir)/%.dep: $(src_dir)/%.c
$(build_dir)/%.o: $(src_dir)/%.c
$(call compile_cc,$@,$<)
ifeq ($(BUILD_INFO),y)
$(build_dir)/lib/sbi/sbi_init.o: $(libsbi_dir)/sbi_init.c FORCE
$(call compile_cc,$@,$<)
endif
$(build_dir)/%.dep: $(src_dir)/%.S
$(call compile_as_dep,$@,$<)
@@ -551,3 +579,6 @@ ifeq ($(install_root_dir),$(install_root_dir_default)/usr)
$(if $(V), @echo " RM $(install_root_dir_default)")
$(CMD_PREFIX)rm -rf $(install_root_dir_default)
endif
.PHONY: FORCE
FORCE: