diff options
Diffstat (limited to 'scripts/Kconfig.include')
| -rw-r--r-- | scripts/Kconfig.include | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index fc10671c297c..a7d9201acfcc 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -23,13 +23,33 @@ success = $(if-success,$(1),y,n) # Return n if <command> exits with 0, y otherwise failure = $(if-success,$(1),n,y) +# $(cc-probe,<flag>) +# The command $(cc-option) and $(cc-option-str) test <flag> with. Not meant +# to be called directly; use one of those two instead. +cc-probe = trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(CC) -Werror $(CLANG_FLAGS) $(shell,echo $(1) | sed "s;^-Wno-;-W;") -c -x c /dev/null -o .tmp_$$/tmp.o + # $(cc-option,<flag>) # Return y if the compiler supports <flag>, n otherwise -cc-option = $(success,trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$/tmp.o) +cc-option = $(success,$(cc-probe,$(1))) + +# $(cc-option-str,<flag>[,<fallback>]) +# Return <flag> if the compiler supports it, <fallback> otherwise. +# <fallback> defaults to an empty string and is returned untested. +cc-option-str = $(if-success,$(cc-probe,$(1)),$(1),$(2)) + +# $(ld-probe,<flag>) +# The command $(ld-option) and $(ld-option-str) test <flag> with. Not meant +# to be called directly; use one of those two instead. +ld-probe = $(LD) -v $(1) # $(ld-option,<flag>) # Return y if the linker supports <flag>, n otherwise -ld-option = $(success,$(LD) -v $(1)) +ld-option = $(success,$(ld-probe,$(1))) + +# $(ld-option-str,<flag>[,<fallback>]) +# Return <flag> if the linker supports it, <fallback> otherwise. +# <fallback> defaults to an empty string and is returned untested. +ld-option-str = $(if-success,$(ld-probe,$(1)),$(1),$(2)) # $(as-instr,<instr>) # Return y if the assembler supports <instr>, n otherwise @@ -61,9 +81,8 @@ ld-version := $(shell,set -- $(ld-info) && echo $2) # machine bit flags # $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise. # $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise. -cc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1)) -m32-flag := $(cc-option-bit,-m32) -m64-flag := $(cc-option-bit,-m64) +m32-flag := $(cc-option-str,-m32) +m64-flag := $(cc-option-str,-m64) # Test whether the compiler can link userspace applications cc_can_link_user = $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(1)) |