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| author | Michael Brown | 2014-08-19 17:17:25 +0200 |
|---|---|---|
| committer | Michael Brown | 2014-08-20 13:36:44 +0200 |
| commit | c801cb29d64764fa8082ec2ab17dd12f74b3143f (patch) | |
| tree | dde1548393981062a33054083daddfecbd2a0c9b /src/Makefile.housekeeping | |
| parent | [smc9000] Avoid using CONFIG as a preprocessor macro (diff) | |
| download | ipxe-c801cb29d64764fa8082ec2ab17dd12f74b3143f.tar.gz ipxe-c801cb29d64764fa8082ec2ab17dd12f74b3143f.tar.xz ipxe-c801cb29d64764fa8082ec2ab17dd12f74b3143f.zip | |
[build] Allow for named configurations at build time
Allow named configurations to be specified via the CONFIG=... build
parameter. For headers in config/*.h which support named
configurations, the following files will be included when building
with CONFIG=<name>:
- config/defaults/<platform>.h (e.g. config/defaults/pcbios.h)
- config/<header>.h
- config/<name>/<header>.h (only if the directory config/<name> exists)
- config/local/<header>.h (autocreated if necessary)
- config/local/<name>/<header>.h (autocreated if necessary)
This mechanism allows for predefined named configurations to be
checked in to the source tree, as a directory config/<name> containing
all of the required header files.
The mechanism also allows for users to define multiple local
configurations, by creating header files in the directory
config/local/<name>.
Note that the config/*.h files which are used only to configure
internal iPXE APIs (e.g. config/ioapi.h) cannot be modified via a
named configuration. This avoids rebuilding the entire iPXE codebase
whenever switching to a different named configuration.
Inspired-by: Robin Smidsrød <robin@smidsrod.no>
Tested-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/Makefile.housekeeping')
| -rw-r--r-- | src/Makefile.housekeeping | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping index 0dce8d06..b07a8d96 100644 --- a/src/Makefile.housekeeping +++ b/src/Makefile.housekeeping @@ -689,6 +689,34 @@ privkey_DEPS += $(PRIVKEY_LIST) CFLAGS_privkey += $(if $(PRIVKEY),-DPRIVATE_KEY="\"$(PRIVKEY_INC)\"") +# (Single-element) list of named configurations +# +CONFIG_LIST := $(BIN)/.config.list +ifeq ($(wildcard $(CONFIG_LIST)),) +CONFIG_OLD := <invalid> +else +CONFIG_OLD := $(shell cat $(CONFIG_LIST)) +endif +ifneq ($(CONFIG_OLD),$(CONFIG)) +$(shell $(ECHO) "$(CONFIG)" > $(CONFIG_LIST)) +endif + +$(CONFIG_LIST) : $(MAKEDEPS) + +VERYCLEANUP += $(CONFIG_LIST) + +# Named configurations +# +ifneq ($(CONFIG),) +ifneq ($(wildcard config/$(CONFIG)),) +CFLAGS += -DCONFIG=$(CONFIG) +endif +CFLAGS += -DLOCAL_CONFIG=$(CONFIG) +endif + +config/named.h : $(CONFIG_LIST) + $(Q)$(TOUCH) $@ + # These files use .incbin inline assembly to include a binary file. # Unfortunately ccache does not detect this dependency and caches # builds even when the binary file has changed. @@ -1260,8 +1288,16 @@ CLEANUP += $(EINFO) # # Local configs # -config/local/%.h : - $(Q)touch $@ +CONFIG_HEADERS := $(patsubst config/%,%,$(wildcard config/*.h)) + +$(foreach HEADER,$(CONFIG_HEADERS),config/local/$(HEADER)) : + $(Q)$(TOUCH) $@ + +ifneq ($(CONFIG),) +$(foreach HEADER,$(CONFIG_HEADERS),config/local/$(CONFIG)/$(HEADER)) : + $(Q)$(MKDIR) -p $(dir $@) + $(Q)$(TOUCH) $@ +endif ############################################################################### # |