[PATCH 03/15] scripts/Kbuild.include: Fix portability problem of "echo -e"

[Steffen Trumtrar <s.trumtrar@pengutronix.de>]

Based on Linux v3.3 patch: 875de98623fa2b29f0cb19915fe3292ab6daa1cb

    scripts/Kbuild.include: Fix portability problem of "echo -e"

    "echo -e" is a GNU extension. When cross-compiling the kernel on a
    BSD-like operating system (Mac OS X in my case), this doesn't work.

    One could install a GNU version of echo, put that in the $PATH before
    the system echo and use "/usr/bin/env echo", but the solution with
    printf is simpler.

    Since it is no disadvantage on Linux, I hope that gets accepted even if
    cross-compiling the Linux kernel on another Unix operating system is
    quite a rare use case.

    Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
    Andreas Bießmann <andreas@biessmann.de>
    Signed-off-by: Michal Marek <mmarek@suse.cz>

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
 scripts/Kbuild.include | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 512d217324c1..e62bd35692d0 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -105,7 +105,7 @@ as-option = $(call try-run,\
 # Usage: cflags-y += $(call as-instr,instr,option1,option2)
 
 as-instr = $(call try-run,\
-	/bin/echo -e "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" -,$(2),$(3))
+	printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
 
 # cc-option
 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
-- 
2.19.2


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