[U-Boot] [PATCH v2 6/8] clang: workaround for generated constants

Jeroen Hofstee
2014-07-30T19:54:54Z

KBuild abuses the asm statement to write to a file and
clang chokes about these invalid asm statements. Hack it
even more by fooling this is actual valid asm code.

cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
cc: Tom Rini <trini@ti.com>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
---
Kbuild | 3 ++-
include/linux/kbuild.h | 6 +++---
2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Kbuild b/Kbuild
index 6e1698c..ef97787 100644
--- a/Kbuild
+++ b/Kbuild
@@ -53,7 +53,8 @@ targets += arch/$(ARCH)/lib/asm-offsets.s

# Default sed regexp - multiline due to syntax constraints
define sed-y
- "/^->/{s:->#\(.*\):/* \1 */:; \
+ "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
+ /^->/{s:->#\(.*\):/* \1 */:; \
s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
s:->::; p;}"
diff --git a/include/linux/kbuild.h b/include/linux/kbuild.h
index ab7805a..8a9f645 100644
--- a/include/linux/kbuild.h
+++ b/include/linux/kbuild.h
@@ -7,14 +7,14 @@
#define __LINUX_KBUILD_H

#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+ asm volatile("\n.ascii \"->" #sym " %0 " #val "\"" : : "i" (val))

-#define BLANK() asm volatile("\n->" : : )
+#define BLANK() asm volatile("\n.ascii \"->\"" : : )

#define OFFSET(sym, str, mem) \
DEFINE(sym, offsetof(struct str, mem))

#define COMMENT(x) \
- asm volatile("\n->#" x)
+ asm volatile("\n.ascii \"->#" x "\"")

#endif
--
1.9.1