diff options
| -rw-r--r-- | Makefile | 31 | ||||
| -rw-r--r-- | README.md | 24 | ||||
| -rw-r--r-- | lib/sbi/sbi_init.c | 8 |
3 files changed, 63 insertions, 0 deletions
@@ -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: @@ -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 diff --git a/lib/sbi/sbi_init.c b/lib/sbi/sbi_init.c index 843659e..b1c7cf0 100644 --- a/lib/sbi/sbi_init.c +++ b/lib/sbi/sbi_init.c @@ -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); } |