depends: Add file-based logging for individual packages

depends/Makefile

@@ -271,7 +271,7 @@ clean-all: clean
 	@rm -rf $(SOURCES_PATH) x86_64* i686* mips* arm* aarch64* powerpc* riscv32* riscv64* s390x*
 
 clean:
-	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD)
+	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD) *.log
 
 install: check-packages $(host_prefix)/share/config.site
 

depends/README.md

@@ -113,7 +113,10 @@ The following can be set when running make: `make FOO=bar`
 - `BUILD_ID_SALT`: Optional salt to use when generating build package ids
 - `FORCE_USE_SYSTEM_CLANG`: (EXPERTS ONLY) When cross-compiling for macOS, use Clang found in the
   system's `$PATH` rather than the default prebuilt release of Clang
-  from llvm.org. Clang 8 or later is required.
+  from llvm.org. Clang 8 or later is required
+- `LOG`: Use file-based logging for individual packages. During a package build its log file
+  resides in the `depends` directory, and the log file is printed out automatically in case
+  of build error. After successful build log files are moved along with package archives
 
 If some packages are not built, for example `make NO_WALLET=1`, the appropriate
 options will be passed to bitcoin's configure. In this case, `--disable-wallet`.

depends/funcs.mk

@@ -67,6 +67,7 @@ $(1)_cached_checksum:=$(BASE_CACHE)/$(host)/$(1)/$(1)-$($(1)_version)-$($(1)_bui
 $(1)_patch_dir:=$(base_build_dir)/$(host)/$(1)/$($(1)_version)-$($(1)_build_id)/.patches-$($(1)_build_id)
 $(1)_prefixbin:=$($($(1)_type)_prefix)/bin/
 $(1)_cached:=$(BASE_CACHE)/$(host)/$(1)/$(1)-$($(1)_version)-$($(1)_build_id).tar.gz
+$(1)_build_log:=$(BASEDIR)/$(1)-$($(1)_version)-$($(1)_build_id).log
 $(1)_all_sources=$($(1)_file_name) $($(1)_extra_sources)
 
 #stamps
@@ -85,7 +86,7 @@ $(1)_download_path_fixed=$(subst :,\:,$$($(1)_download_path))
 # The default behavior for tar will try to set ownership when running as uid 0 and may not succeed, --no-same-owner disables this behavior
 $(1)_fetch_cmds ?= $(call fetch_file,$(1),$(subst \:,:,$$($(1)_download_path_fixed)),$$($(1)_download_file),$($(1)_file_name),$($(1)_sha256_hash))
 $(1)_extract_cmds ?= mkdir -p $$($(1)_extract_dir) && echo "$$($(1)_sha256_hash)  $$($(1)_source)" > $$($(1)_extract_dir)/.$$($(1)_file_name).hash &&  $(build_SHA256SUM) -c $$($(1)_extract_dir)/.$$($(1)_file_name).hash && $(build_TAR) --no-same-owner --strip-components=1 -xf $$($(1)_source)
-$(1)_preprocess_cmds ?=
+$(1)_preprocess_cmds ?= true
 $(1)_build_cmds ?=
 $(1)_config_cmds ?=
 $(1)_stage_cmds ?=
@@ -187,6 +188,10 @@ endif
 endef
 
 define int_add_cmds
+ifneq ($(LOG),)
+$(1)_logging = >>$$($(1)_build_log) 2>&1 || { if test -f $$($(1)_build_log); then cat $$($(1)_build_log); fi; exit 1; }
+endif
+
 $($(1)_fetched):
 	mkdir -p $$(@D) $(SOURCES_PATH)
 	rm -f $$@
@@ -203,23 +208,23 @@ $($(1)_preprocessed): | $($(1)_extracted)
 	echo Preprocessing $(1)...
 	mkdir -p $$(@D) $($(1)_patch_dir)
 	$(foreach patch,$($(1)_patches),cd $(PATCHES_PATH)/$(1); cp $(patch) $($(1)_patch_dir) ;)
-	cd $$(@D); $($(1)_preprocess_cmds)
+	{ cd $$(@D); $($(1)_preprocess_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_configured): | $($(1)_dependencies) $($(1)_preprocessed)
 	echo Configuring $(1)...
 	rm -rf $(host_prefix); mkdir -p $(host_prefix)/lib; cd $(host_prefix); $(foreach package,$($(1)_all_dependencies), $(build_TAR) --no-same-owner -xf $($(package)_cached); )
 	mkdir -p $$(@D)
-	+cd $$(@D); $($(1)_config_env) $($(1)_config_cmds)
+	+{ cd $$(@D); $($(1)_config_env) $($(1)_config_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_built): | $($(1)_configured)
 	echo Building $(1)...
 	mkdir -p $$(@D)
-	+cd $$(@D); $($(1)_build_env) $($(1)_build_cmds)
+	+{ cd $$(@D); $($(1)_build_env) $($(1)_build_cmds); } $$($(1)_logging)
 	touch $$@
 $($(1)_staged): | $($(1)_built)
 	echo Staging $(1)...
 	mkdir -p $($(1)_staging_dir)/$(host_prefix)
-	cd $($(1)_build_dir); $($(1)_stage_env) $($(1)_stage_cmds)
+	+{ cd $($(1)_build_dir); $($(1)_stage_env) $($(1)_stage_cmds); } $$($(1)_logging)
 	rm -rf $($(1)_extract_dir)
 	touch $$@
 $($(1)_postprocessed): | $($(1)_staged)
@@ -233,6 +238,7 @@ $($(1)_cached): | $($(1)_dependencies) $($(1)_postprocessed)
 	rm -rf $$(@D) && mkdir -p $$(@D)
 	mv $$($(1)_staging_dir)/$$(@F) $$(@)
 	rm -rf $($(1)_staging_dir)
+	if test -f $($(1)_build_log); then mv $($(1)_build_log) $$(@D); fi
 $($(1)_cached_checksum): $($(1)_cached)
 	cd $$(@D); $(build_SHA256SUM) $$(<F) > $$(@)