[PATCH v2 01/18] kbuild: add ld-name macro and support for GNU gold
From: samitolvanen@google.com (Sami Tolvanen)
Date: 2017-11-15 21:35:07
Also in:
linux-kbuild, lkml
Subsystem:
kernel build + files below scripts/ (unless maintained elsewhere), the rest · Maintainers:
Nathan Chancellor, Nicolas Schier, Linus Torvalds
GNU gold may require different flags than GNU ld. Add a macro for detecting the linker and conditionally add gold specific flags from LDFLAGS_GOLD. Reviewed-by: Nick Desaulniers <redacted> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> --- Makefile | 5 +++++ scripts/Kbuild.include | 4 ++++ 2 files changed, 9 insertions(+)
diff --git a/Makefile b/Makefile
index 763ab35df12a..f976af9525bf 100644
--- a/Makefile
+++ b/Makefile@@ -827,6 +827,11 @@ include scripts/Makefile.kasan include scripts/Makefile.extrawarn include scripts/Makefile.ubsan +# Add any flags specific to ld.gold +ifeq ($(ld-name),gold) +LDFLAGS += $(LDFLAGS_GOLD) +endif + # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the # last assignments KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 9ffd3dda3889..584d6cecd7c0 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include@@ -172,6 +172,10 @@ ld-option = $(call try-run,\ # Important: no spaces around options ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) +# ld-name +# Expands to either bfd or gold +ld-name = $(shell $(LD) -v 2>&1 | grep -q "GNU gold" && echo gold || echo bfd) + # ld-version # Note this is mainly for HJ Lu's 3 number binutil versions ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
--
2.15.0.448.gf294e3d99a-goog