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This is required for further patches that will introduce diverging behaviour depending on the linker implementation in use. Note that LLVM ld returns "compatible with GNU linkers" as part of the version string, so be on the safe side and use '^' to only match at the start of the line in case LLVM ever decides to change the text to use "compatible with GNU ld" instead. Signed-off-by: Roger Pau Monné Reviewed-by: Michal Orzel Acked-by: Julien Grall --- This was discussed with Jan in: https://lore.kernel.org/xen-devel/fbe0e0f0-85dd-434b-aca5-fa513b720c0b@suse.com/ While he would be fine to use the option if it was present, he isn't convinced tools capabilities should be recorded in Kconfig, and hence doesn't want to introduce the option himself (I hope I got this worded right). --- xen/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/xen/Kconfig b/xen/Kconfig index ec2bd9fbcf..134e6e68ad 100644 --- a/xen/Kconfig +++ b/xen/Kconfig @@ -23,6 +23,12 @@ config CLANG_VERSION int default $(shell,$(srctree)/scripts/clang-version.sh $(CC)) +config LD_IS_GNU + def_bool $(success,$(LD) --version | head -n 1 | grep -q "^GNU ld") + +config LD_IS_LLVM + def_bool $(success,$(LD) --version | head -n 1 | grep -q "^LLD") + # -fvisibility=hidden reduces -fpic cost, if it's available config CC_HAS_VISIBILITY_ATTRIBUTE def_bool $(cc-option,-fvisibility=hidden)