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Kbuild, lto: add ld-version and ld-ifversion macros

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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>
This commit is contained in:
Andi Kleen 2014-02-08 09:01:13 +01:00 committed by H. Peter Anvin
parent 7d02b490e9
commit ccbef1674a
2 changed files with 17 additions and 0 deletions
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9
scripts/Kbuild.include
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@ -155,6 +155,15 @@ ld-option = $(call try-run,\
# Important: no spaces around options # Important: no spaces around options
ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) ar-option = $(call try-run, $(AR) rc$(1) "$$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))
###### ######
### ###

8
scripts/ld-version.sh Executable file
View file

@ -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
}