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authorJeroen Hofstee <jeroen@myspectrum.nl>2014-05-30 15:45:27 +0200
committerTom Rini <trini@ti.com>2014-06-11 16:25:38 -0400
commit9262233a963713f1ab77bcf30dcaffdfe6822200 (patch)
treef2630a858613d57c5372556957af8753a74e75f9 /Makefile
parent28b62f0de361ae640eb286969536a236cc8febda (diff)
Makefile: fix clang warnings due to clang support
Building u-boot tools with clang as a host compiler e.g. on FreeBSD with `gmake HOSTCC=clang CONFIG_USE_PRIVATE_LIBGCC=y tools` leads to many warnings [1] for every compiler invocation since commit 598e2d33. Part of mentioned commit imports linux patches: - kbuild: LLVMLinux: Adapt warnings for compilation with clang - kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang No version of clang supports the gcc fno-delete-null-pointer-checks though, but it is only passed to clang. Gcc does not have the clang specific Qunused-arguments for the target. Furthermore several warnings are disabled which aren't encountered in u-boot. Since such a build has worked for quite some time and works after removing these changes, just remove the clang specific handling to restore normal building with clang as hostcc. [1] Actual warnings ------------------- GEN include/autoconf.mk.dep arm-freebsd-gcc: unrecognized option '-Qunused-arguments' HOSTCC scripts/basic/fixdep clang: warning: argument unused during compilation: '-fno-delete-null-pointer-checks' cc: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile28
1 files changed, 0 insertions, 28 deletions
diff --git a/Makefile b/Makefile
index cf810a9d96e..0900e5e0a76 100644
--- a/Makefile
+++ b/Makefile
@@ -209,11 +209,6 @@ HOSTCXX = g++
HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
-ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
-HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
- -Wno-missing-field-initializers -fno-delete-null-pointer-checks
-endif
-
ifeq ($(HOSTOS),cygwin)
HOSTCFLAGS += -ansi
endif
@@ -320,15 +315,6 @@ endif
export quiet Q KBUILD_VERBOSE
-ifneq ($(CC),)
-ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
-COMPILER := clang
-else
-COMPILER := gcc
-endif
-export COMPILER
-endif
-
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
@@ -539,20 +525,6 @@ endif
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
-ifeq ($(COMPILER),clang)
-KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
-KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
-KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
-KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
-# Quiet clang warning: comparison of unsigned expression < 0 is always false
-KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
-# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
-# source of a reference will be _MergedGlobals and not on of the whitelisted names.
-# See modpost pattern 2
-KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
-endif
-
KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
# option to the assembler.