haproxy/include/make/options.mk
Willy Tarreau 6a2cd33509 BUILD: makefile: remove the special case of the SSL option
By creating USE_SSL and enabling it when USE_OPENSSL is set, we can
get rid of the special case that was made with it regarding cflags
collect and when resetting options. The option doesn't need to be
manually set, though in the future it might prove useful if other
non-openssl API are supported.
2022-12-23 16:53:35 +01:00

53 lines
2.5 KiB
Makefile

# this contains various functions and macros used to manipulate USE_* options
# and their flags
# Depending on the target platform, some options are set, as well as some
# CFLAGS and LDFLAGS. All variables pre-set here will not appear in the build
# options string. They may be set to any value, but are historically set to
# "implicit" which eases debugging. You should not have to change anything
# there unless you're adding support for a new platform.
default_opts = $(foreach name,$(1),$(eval $(name)=implicit))
# Return USE_xxx=$(USE_xxx) if the variable was set from the environment or the
# command line.
ignore_implicit = $(if $(subst environment,,$(origin $(1))), \
$(if $(subst command line,,$(origin $(1))),, \
$(1)=$($(1))), \
$(1)=$($(1))) \
# This macro collects all USE_* values except those set to "implicit". This
# is used to report a list of all flags which were used to build this version.
# Do not assign anything to it.
build_options = $(foreach opt,$(use_opts),$(call ignore_implicit,$(opt)))
# Make a list of all known features with +/- prepended depending on their
# activation status. Must be a macro so that dynamically enabled ones are
# evaluated with their current status.
build_features = $(foreach opt,$(patsubst USE_%,%,$(sort $(use_opts))),$(if $(USE_$(opt)),+$(opt),-$(opt)))
# This returns a list of -DUSE_* for all known USE_* that are set
opts_as_defines = $(foreach opt,$(use_opts),$(if $($(opt)),-D$(opt),))
# Lists all enabled or disabled options without the "USE_" prefix
enabled_opts = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt)),$(opt),))
disabled_opts = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt)),,$(opt)))
# preset all XXX_{INC,LIB,CFLAGS,LDFLAGS,SRC} variables to empty for $1=XXX
reset_opt_vars = $(foreach name,INC LIB CFLAGS LDFLAGS SRC,$(eval $(1)_$(name)=))
# preset all variables for all supported build options among use_opts
reset_opts_vars = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(call reset_opt_vars,$(opt)))
# append $(1)_{C,LD}FLAGS into OPTIONS_{C,LD}FLAGS if not empty
define collect_opt_flags =
ifneq ($$($(1)_CFLAGS),)
OPTIONS_CFLAGS += $$($(1)_CFLAGS)
endif
ifneq ($$($(1)_LDFLAGS),)
OPTIONS_LDFLAGS += $$($(1)_LDFLAGS)
endif
endef
# collect all known USE_foo's foo_{C,LD}FLAGS into OPTIONS_{C,LD}FLAGS
collect_opts_flags = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(eval $(call collect_opt_flags,$(opt))))