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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | # Generate/check/update a .h file to reflect the values of Makefile
# variables
#
# Example usage (by default, check-conf-h will consider all CFG_*
# and _CFG_* variables plus PLATFORM_*):
#
# path/to/conf.h: FORCE
# $(call check-conf-h)
#
# Or, to include only the variables with the given prefix(es):
#
# path/to/crypto_config.h: FORCE
# $(call check-conf-h,CFG_CRYPTO_ CRYPTO_)
define check-conf-h
$(q)set -e; \
$(cmd-echo-silent) ' CHK $@'; \
cnf='$(strip $(foreach var, \
$(call cfg-vars-by-prefix,$1), \
$(call cfg-make-define,$(var))))'; \
guard="_`echo $@ | tr -- -/.+ _`_"; \
mkdir -p $(dir $@); \
echo "#ifndef $${guard}" >$@.tmp; \
echo "#define $${guard}" >>$@.tmp; \
echo -n "$${cnf}" | sed 's/_nl_ */\n/g' >>$@.tmp; \
echo "#endif" >>$@.tmp; \
$(call mv-if-changed,$@.tmp,$@)
endef
define check-conf-cmake
$(q)set -e; \
$(cmd-echo-silent) ' CHK $@'; \
cnf='$(strip $(foreach var, \
$(call cfg-vars-by-prefix,$1), \
$(call cfg-cmake-set,$(var))))'; \
mkdir -p $(dir $@); \
echo "# auto-generated TEE configuration file" >$@.tmp; \
echo "# TEE version ${TEE_IMPL_VERSION}" >>$@.tmp; \
echo -n "$${cnf}" | sed 's/_nl_ */\n/g' >>$@.tmp; \
$(call mv-if-changed,$@.tmp,$@)
endef
define check-conf-mk
$(q)set -e; \
$(cmd-echo-silent) ' CHK $@'; \
cnf='$(strip $(foreach var, \
$(call cfg-vars-by-prefix,CFG_), \
$(strip $(var)=$($(var))_nl_)))'; \
mkdir -p $(dir $@); \
echo "# auto-generated TEE configuration file" >$@.tmp; \
echo "# TEE version ${TEE_IMPL_VERSION}" >>$@.tmp; \
echo "ARCH=${ARCH}" >>$@.tmp; \
echo "PLATFORM=${PLATFORM}" >>$@.tmp; \
echo "PLATFORM_FLAVOR=${PLATFORM_FLAVOR}" >>$@.tmp; \
echo -n "$${cnf}" | sed 's/_nl_ */\n/g' >>$@.tmp; \
$(call mv-if-changed,$@.tmp,$@)
endef
# Rename $1 to $2 only if file content differs. Otherwise just delete $1.
define mv-if-changed
if cmp -s $2 $1; then \
rm -f $1; \
else \
$(cmd-echo-silent) ' UPD $2'; \
mv $1 $2; \
fi
endef
define cfg-vars-by-prefix
$(strip $(if $(1),$(call _cfg-vars-by-prefix,$(1)),
$(call _cfg-vars-by-prefix,CFG_ _CFG_ PLATFORM_)))
endef
define _cfg-vars-by-prefix
$(sort $(foreach prefix,$(1),$(filter $(prefix)%,$(.VARIABLES))))
endef
# Convert a makefile variable to a #define
# <undefined>, n => <undefined>
# y => 1
# <other value> => <other value>
define cfg-make-define
$(strip $(if $(filter y,$($1)),
#define $1 1_nl_,
$(if $(filter xn x,x$($1)),
/* $1 is not set */_nl_,
#define $1 $($1)_nl_)))
endef
# Convert a makefile variable to a cmake set statement
# <undefined>, n => <undefined>
# <other value> => <other value>
define cfg-cmake-set
$(strip $(if $(filter xn x,x$($1)),
# $1 is not set _nl_,
set($1 $($1))_nl_))
endef
# Returns 'y' if at least one variable is 'y', empty otherwise
# Example:
# FOO_OR_BAR := $(call cfg-one-enabled, FOO BAR)
cfg-one-enabled = $(if $(filter y, $(foreach var,$(1),$($(var)))),y,)
# Returns 'y' if all variables are 'y', empty otherwise
# Example:
# FOO_AND_BAR := $(call cfg-all-enabled, FOO BAR)
cfg-all-enabled = \
$(strip \
$(if $(1), \
$(if $(filter y,$($(firstword $(1)))), \
$(call cfg-all-enabled,$(filter-out $(firstword $(1)),$(1))), \
), \
y \
) \
)
# Disable a configuration variable if some dependency is disabled
# Example:
# $(eval $(call cfg-depends-all,FOO,BAR BAZ))
# Will clear FOO if it is initially 'y' and BAR or BAZ are not 'y'
cfg-depends-all = \
$(strip \
$(if $(filter y, $($(1))), \
$(if $(call cfg-all-enabled,$(2)), \
, \
$(warning Warning: Disabling $(1) [requires $(strip $(2))]) \
override $(1) := \
) \
) \
)
# Disable a configuration variable if all dependencies are disabled
# Example:
# $(eval $(call cfg-depends-one,FOO,BAR BAZ))
# Will clear FOO if it is initially 'y' and both BAR and BAZ are not 'y'
cfg-depends-one = \
$(strip \
$(if $(filter y, $($(1))), \
$(if $(call cfg-one-enabled,$(2)), \
, \
$(warning Warning: Disabling $(1) [requires (one of) $(strip $(2))]) \
override $(1) := \
) \
) \
)
# Enable all depend variables
# Example:
# $(eval $(call cfg-enable-all-depends,FOO,BAR BAZ))
# Will enable BAR and BAZ if FOO is initially 'y'
cfg-enable-all-depends = \
$(strip \
$(if $(2), \
$(if $(filter y, $($(1))), \
$(if $(filter y,$($(firstword $(2)))), \
, \
$(warning Warning: Enabling $(firstword $(2)) [required by $(1)]) \
$(eval override $(firstword $(2)) := y) \
) \
$(call cfg-enable-all-depends,$(1),$(filter-out $(firstword $(2)),$(2))), \
) \
, \
) \
)
# Set a variable or error out if it was previously set to a different value
# The reason message (3rd parameter) is optional
# Example:
# $(call force,CFG_FOO,foo,required by CFG_BAR)
define force
$(eval $(call _force,$(1),$(2),$(3)))
endef
define _force
ifdef $(1)
ifneq ($($(1)),$(2))
ifneq (,$(3))
_reason := $$(_empty) [$(3)]
endif
$$(error $(1) is set to '$($(1))' (from $(origin $(1))) but its value must be '$(2)'$$(_reason))
endif
endif
$(1) := $(2)
endef
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