# git rev-parse -q --verify 815f0ddb346c196018d4d8f8f55c12b83da1de3f^{commit}
815f0ddb346c196018d4d8f8f55c12b83da1de3f
already have revision, skipping fetch
# git checkout -q -f -B kisskb 815f0ddb346c196018d4d8f8f55c12b83da1de3f
# git clean -qxdf
# < git log -1
# commit 815f0ddb346c196018d4d8f8f55c12b83da1de3f
# Author: Nick Desaulniers <ndesaulniers@google.com>
# Date:   Wed Aug 22 16:37:24 2018 -0700
# 
#     include/linux/compiler*.h: make compiler-*.h mutually exclusive
#     
#     Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
#     recently exposed a brittle part of the build for supporting non-gcc
#     compilers.
#     
#     Both Clang and ICC define __GNUC__, __GNUC_MINOR__, and
#     __GNUC_PATCHLEVEL__ for quick compatibility with code bases that haven't
#     added compiler specific checks for __clang__ or __INTEL_COMPILER.
#     
#     This is brittle, as they happened to get compatibility by posing as a
#     certain version of GCC.  This broke when upgrading the minimal version
#     of GCC required to build the kernel, to a version above what ICC and
#     Clang claim to be.
#     
#     Rather than always including compiler-gcc.h then undefining or
#     redefining macros in compiler-intel.h or compiler-clang.h, let's
#     separate out the compiler specific macro definitions into mutually
#     exclusive headers, do more proper compiler detection, and keep shared
#     definitions in compiler_types.h.
#     
#     Fixes: cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
#     Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
#     Suggested-by: Eli Friedman <efriedma@codeaurora.org>
#     Suggested-by: Joe Perches <joe@perches.com>
#     Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version
# < git log --format=%s --max-count=1 815f0ddb346c196018d4d8f8f55c12b83da1de3f
# < make -s -j 40 ARCH=arm O=/kisskb/build/linus_lpc32xx_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  lpc32xx_defconfig
# make -s -j 40 ARCH=arm O=/kisskb/build/linus_lpc32xx_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  
<stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:129:33: warning: 'levelspread[<Ub5a0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:96:6: note: 'levelspread[<Ub5a0>]' was declared here
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/ipc/shm.c: In function 'ksys_shmdt':
/kisskb/src/ipc/shm.c:1685:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:341:21: note: 'pdeo' was declared here
/kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic':
/kisskb/src/net/core/gen_stats.c:161:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list':
/kisskb/src/net/core/dev.c:3344:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker':
/kisskb/src/lib/rhashtable.c:265:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c:230:28: note: 'next' was declared here
/kisskb/src/drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_add':
/kisskb/src/drivers/gpio/gpiolib-of.c:390:8: warning: 'dflags' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpio/gpiolib-of.c:376:19: note: 'dflags' was declared here
/kisskb/src/drivers/gpio/gpiolib-of.c:390:8: warning: 'lflags' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpio/gpiolib-of.c:375:25: note: 'lflags' was declared here
/kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery':
/kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/mtd/ubi/eba.c: In function 'try_write_vid_and_data':
/kisskb/src/drivers/mtd/ubi/eba.c:1001:7: warning: 'opnum' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/linus_lpc32xx_defconfig_arm
# Build took: 0:00:30.606643