GitHub-Mirror/opensbi
2
0
Fork 0
mirror of https://github.com/Fishwaldo/opensbi.git synced 2025-03-16 11:51:33 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Makefile: Add build time and compiler info string

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

31
Makefile
View file

@ -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:

24
README.md
View file

@ -254,6 +254,29 @@ to produce broken binaries with missing relocations; it is therefore currently
recommended that this combination be avoided or *FW_PIC=n* be used to disable
building OpenSBI as a position-independent binary.
Building with timestamp and compiler info
-----------------------------------------
When doing development, we may want to know the build time and compiler info
for debug purpose. OpenSBI can also be built with timestamp and compiler info.
To build with those info and print it out at boot time, we can just simply add
`BUILD_INFO=y`, like:
```
make BUILD_INFO=y
```
But if you have used `BUILD_INFO=y`, and want to switch back to `BUILD_INFO=n`,
you must do
```
make clean
```
before the next build.
NOTE: Using `BUILD_INFO=y` without specifying SOURCE_DATE_EPOCH will violate
[reproducible builds]. This definition is ONLY for development and debug
purpose, and should NOT be used in a product which follows "reproducible
builds".
Contributing to OpenSBI
-----------------------
@ -336,3 +359,4 @@ make I=<install_directory> install_docs
[Doxygen manual]: http://www.doxygen.nl/manual/index.html
[Kendryte standalone SDK]: https://github.com/kendryte/kendryte-standalone-sdk
[third party notices]: ThirdPartyNotices.md
[reproducible builds]: https://reproducible-builds.org

8
lib/sbi/sbi_init.c
View file

@ -48,6 +48,14 @@ static void sbi_boot_print_banner(struct sbi_scratch *scratch)
OPENSBI_VERSION_MINOR);
#endif
#ifdef OPENSBI_BUILD_TIME_STAMP
sbi_printf("Build time: %s\n", OPENSBI_BUILD_TIME_STAMP);
#endif
#ifdef OPENSBI_BUILD_COMPILER_VERSION
sbi_printf("Build compiler: %s\n", OPENSBI_BUILD_COMPILER_VERSION);
#endif
sbi_printf(BANNER);
}