Kbuild, lto: add ld-version and ld-ifversion macros
authorAndi Kleen <ak@linux.intel.com>
Sat, 8 Feb 2014 08:01:13 +0000 (09:01 +0100)
committerH. Peter Anvin <hpa@linux.intel.com>
Fri, 14 Feb 2014 04:25:00 +0000 (20:25 -0800)
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
scripts/ld-version.sh [new file with mode: 0755]

index 547e15daf03dc86dbfa72818122bc4c61929edb0..93a0da26582b863c64efd5ff226a8386bfb58064 100644 (file)
@@ -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 (executable)
index 0000000..198580d
--- /dev/null
@@ -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
+       }