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| author | Nick Desaulniers <ndesaulniers@google.com> | 2019-04-23 14:27:41 -0700 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-05-21 00:02:59 +0900 |
| commit | 055efab3120bae7ab1ed841317774f3c953f6e1b (patch) | |
| tree | d464025628dc65e9e36430ee53e35749639431be | |
| parent | cb6f8739fbf98203d0fb0bc2c2dbbec0ddfe978a (diff) | |
| download | lwn-055efab3120bae7ab1ed841317774f3c953f6e1b.tar.gz lwn-055efab3120bae7ab1ed841317774f3c953f6e1b.zip | |
kbuild: drop support for cc-ldoption
If you want to see if your linker supports a certain flag, then ask the
linker directly with ld-option (not the compiler with cc-ldoption).
Checking for linker flag support is an antipattern that complicates the
usage of various linkers other than bfd via -fuse-ld={bfd|gold|lld}.
Cc: clang-built-linux@googlegroups.com
Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| -rw-r--r-- | Documentation/kbuild/makefiles.txt | 14 | ||||
| -rw-r--r-- | scripts/Kbuild.include | 5 |
2 files changed, 0 insertions, 19 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt index 03c065855eaf..d65ad5746f94 100644 --- a/Documentation/kbuild/makefiles.txt +++ b/Documentation/kbuild/makefiles.txt @@ -437,20 +437,6 @@ more details, with real examples. The second argument is optional, and if supplied will be used if first argument is not supported. - cc-ldoption - cc-ldoption is used to check if $(CC) when used to link object files - supports the given option. An optional second option may be - specified if first option are not supported. - - Example: - #arch/x86/kernel/Makefile - vsyscall-flags += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) - - In the above example, vsyscall-flags will be assigned the option - -Wl$(comma)--hash-style=sysv if it is supported by $(CC). - The second argument is optional, and if supplied will be used - if first argument is not supported. - as-instr as-instr checks if the assembler reports a specific instruction and then outputs either option1 or option2 diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index a675ce11a573..e2de6c4dce90 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -138,11 +138,6 @@ cc-disable-warning = $(call try-run,\ # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4)) -# cc-ldoption -# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both) -cc-ldoption = $(call try-run,\ - $(CC) $(1) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2)) - # ld-option # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y) ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3)) |