From ccbef1674a1579842c7dbdf554efca85d2cd245a Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@linux.intel.com>
Date: Sat, 8 Feb 2014 09:01:13 +0100
Subject: [PATCH] Kbuild, lto: add ld-version and ld-ifversion macros
To check the linker version. Used by the LTO makefile.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1391846481-31491-9-git-send-email-ak@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
scripts/Kbuild.include | 9 +++++++++
scripts/ld-version.sh | 8 ++++++++
2 files changed, 17 insertions(+)
create mode 100755 scripts/ld-version.sh
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 547e15daf03d..93a0da26582b 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -155,6 +155,15 @@ ld-option = $(call try-run,\
# Important: no spaces around options
ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
+# ld-version
+# Usage: $(call ld-version)
+# Note this is mainly for HJ Lu's 3 number binutil versions
+ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
+
+# ld-ifversion
+# Usage: $(call ld-ifversion, -ge, 22252, y)
+ld-ifversion = $(shell [ $(call ld-version) $(1) $(2) ] && echo $(3))
+
######
###
diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
new file mode 100755
index 000000000000..198580d245e0
--- /dev/null
+++ b/scripts/ld-version.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/awk -f
+# extract linker version number from stdin and turn into single number
+ {
+ gsub(".*)", "");
+ split($1,a, ".");
+ print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5];
+ exit
+ }
--
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