lkml.org 
[lkml]   [2014]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 10/20] Kbuild, lto: add ld-version and ld-ifversion macros
    Date
    From: Andi Kleen <ak@linux.intel.com>

    To check the linker version. Used by the LTO makefile.

    Signed-off-by: Andi Kleen <ak@linux.intel.com>
    ---
    Documentation/kbuild/makefiles.txt | 10 ++++++++++
    scripts/Kbuild.include | 9 +++++++++
    scripts/ld-version.sh | 8 ++++++++
    3 files changed, 27 insertions(+)
    create mode 100755 scripts/ld-version.sh

    diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
    index d567a7c..40d51f3 100644
    --- a/Documentation/kbuild/makefiles.txt
    +++ b/Documentation/kbuild/makefiles.txt
    @@ -595,6 +595,16 @@ more details, with real examples.
    #Makefile
    LDFLAGS_vmlinux += $(call ld-option, -X)

    + ld-version
    + ld-version returns the full version number of $(LD), for three
    + number binutils versions, like the Linux binutils
    +
    + ld-ifversion
    + Check the version number of the $(LD) linker in an if.
    +
    + Example:
    + #Makefile.lto
    + ifeq ($(call ld-ifversion,-ge,22710001,y),y)

    === 4 Host Program support

    diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
    index 547e15d..93a0da2 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 0000000..198580d
    --- /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
    + }
    --
    1.8.5.2


    \
     
     \ /
      Last update: 2014-02-18 17:41    [W:8.193 / U:0.024 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site