| # A collection of handy macros used all over the build system. |
| # This can be included anywhere and must not have any side effects. |
| |
| # Find the local dir of the make file |
| GET_LOCAL_DIR = $(patsubst %/,%,$(dir $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))) |
| |
| # makes sure the target dir exists |
| MKDIR = if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi |
| |
| # prepends the BUILD_DIR var to each item in the list |
| TOBUILDDIR = $(addprefix $(BUILDDIR)/,$(1)) |
| |
| # converts specified variable to boolean value |
| TOBOOL = $(if $(filter-out 0 false,$1),true,false) |
| |
| COMMA := , |
| E := |
| SPACE := $E $E |
| |
| # lower case and upper case translation |
| LC = $(subst A,a,$(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)))))))))))))))))))))))))) |
| UC = $(subst a,A,$(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)))))))))))))))))))))))))) |
| |
| # test if two files are different, replacing the first |
| # with the second if so |
| # args: $1 - temporary file to test |
| # $2 - file to replace |
| define TESTANDREPLACEFILE |
| if [ -f "$2" ]; then \ |
| if cmp -- "$1" "$2"; then \ |
| rm -f -- $1; \ |
| else \ |
| mv -- $1 $2; \ |
| fi \ |
| else \ |
| mv -- $1 $2; \ |
| fi |
| endef |
| |
| # replace all characters or sequences of letters in defines to convert to a proper C style variable |
| MAKECVAR=$(subst C++,CPP,$(subst -,_,$(subst /,_,$(subst .,_,$1)))) |
| |
| # generate a header file at $1 with an expanded variable in $2 |
| # $3 provides an (optional) raw footer to append to the end |
| # NOTE: the left side of the variable will be upper cased and some symbols replaced |
| # to be valid C names (see MAKECVAR above). |
| # The right side of the #define can be any valid C but cannot contain spaces, even |
| # inside a string. |
| define MAKECONFIGHEADER |
| $(info generating $1) \ |
| $(MKDIR); \ |
| echo '#pragma once' > $1.tmp; \ |
| $(foreach var,$($(2)), \ |
| echo \#define \ |
| $(firstword $(subst =,$(SPACE),$(call MAKECVAR,$(call UC,$(var))))) \ |
| $(if $(findstring =,$(var)),$(subst $(firstword $(subst =,$(SPACE),$(var)))=,,$(var))) \ |
| >> $1.tmp;) \ |
| echo $3 >> $1.tmp; \ |
| $(call TESTANDREPLACEFILE,$1.tmp,$1) |
| endef |
| |
| check_compiler_flag = $(shell $(CC) -c -xc /dev/null -o /dev/null $(1) 2>/dev/null && echo yes || echo no) |
| # Due to GCC's behaviour with regard to unknown warning flags this macro can |
| # only be used to detect warning-enable options (-Wfoo) but not for warning |
| # disable flags such as -Wno-foo. |
| # https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#:~:text=When%20an%20unrecognized%20warning%20option%20is%20requested |
| is_warning_flag_supported = $(strip \ |
| $(if $(findstring -Wno-,$(1)),$(error "Cannot use -Wno- flags here: $(1)"),) \ |
| $(if $(CC),,$(error "CC is not set, this macro cannot be used yet!")) \ |
| $(if $($(call MAKECVAR,$(1))), \ |
| $(info Using cached result for $(1): $($(call MAKECVAR,$(1)))), \ |
| $(eval $(call MAKECVAR,$(1)) := $(call check_compiler_flag,-Werror -fsyntax-only $(1))) \ |
| $(info Checking if $(1) is supported: $($(call MAKECVAR,$(1)))) \ |
| )$($(call MAKECVAR,$(1)))) |