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https://github.com/RIOT-OS/RIOT.git
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8c055f0f3e
The Makefile function `version_is_greater_or_equal` is used to check if a version of GNU Make is at least the required one. However, it has the built-in assumption the version numbers have to format x.y.z, but Alpine Linux currently ships GNU Make 4.4. This results in `$(call _pad_number,3,)` which runs `printf '$03d' ''` in the shell, which is not valid. This fixes the issue by making `_pad_number` more robust by fall back to printing `0` with the given padding, if the number given to print is empty.
49 lines
2.8 KiB
Makefile
49 lines
2.8 KiB
Makefile
# Make only version of string functions
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#
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# This replaces the pattern of using ':= $(shell echo $(var) | tr 'a-z-' 'A-Z_)'
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# On local tests the make version was ~100 times faster than the shell one
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lowercase = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$1))))))))))))))))))))))))))
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uppercase = $(subst a,A,$(subst b,B,$(subst c,C,$(subst d,D,$(subst e,E,$(subst f,F,$(subst g,G,$(subst h,H,$(subst i,I,$(subst j,J,$(subst k,K,$(subst l,L,$(subst m,M,$(subst n,N,$(subst o,O,$(subst p,P,$(subst q,Q,$(subst r,R,$(subst s,S,$(subst t,T,$(subst u,U,$(subst v,V,$(subst w,W,$(subst x,X,$(subst y,Y,$(subst z,Z,$1))))))))))))))))))))))))))
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uppercase_and_underscore = $(call uppercase,$(subst -,_,$1))
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# Padds number $2 to $1 digits. If $2 is empty, zero will be printed instead.
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_pad_number = $(shell printf '%0$1d' $(if $2,$2,0))
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# Gets major, minor, patch from 'major.minor.patch', e.g.: 4.2.1 by index
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# $1: index
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# $2: version
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_version = $(word $1, $(subst ., ,$2))
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# Returns padded version 'major.minor.patch' to 3 digits
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# eg: 4.2.1 -> 004.002.001
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# $1: version
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_padded_version = $(subst $(space),.,$(foreach var,1 2 3,$(call _pad_number,3,$(call _version,$(var),$1))))
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# Checks if $1 is greater than $2
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# $1, $2: The values to compare must be padded to the same length
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# otherwise when using '$(sort)' make will consider '2' larger
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# than '19'
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# Return 1 if $1 is greater than $2, nothing otherwise
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_is_greater = $(if $(filter $1,$(firstword $(sort $1 $2))),,1)
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# Checks if version $1 is greater than version $2
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# $1: version to check, '.' separated version 'major.minor.patch'
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# $2: minimum version, '.' separated version 'major.minor.patch'
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# Return 1 if $1 is greater than $2, nothing otherwise
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version_is_greater = $(call _is_greater,$(call _padded_version,$1),\
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$(call _padded_version,$2))
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# Checks if version $1 is equal to version $2
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# $1,$2: version to check, '.' separated version 'major.minor.patch'
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# Return 1 if $1 equal to $2, nothing otherwise
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_is_equal = $(if $(and $(findstring $(1),$(2)),$(findstring $(2),$(1))),1,)
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# Checks if version $1 is greater or equal than version $2
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# $1: version to check, '.' separated version 'major.minor.patch'
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# $2: minimum version, '.' separated version 'major.minor.patch'
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# Return 1 if $1 is greater or equal than $2, nothing otherwise
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version_is_greater_or_equal = $(or \
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$(call _is_greater,$(call _padded_version,$1),$(call _padded_version,$2)),\
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$(call _is_equal,$(call _padded_version,$1),$(call _padded_version,$2)))
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