[llvmlinux] Compiling sources from llvmlinux/kernel.git

Vinícius Tinti viniciustinti at gmail.com
Wed Nov 26 15:42:12 UTC 2014


On Wed, Nov 26, 2014 at 1:40 PM, Juan Simón <decedion at gmail.com> wrote:
> My config file:  http://pastebin.com/qtvSyeKt
>
> 2014-11-26 16:38 GMT+01:00 Juan Simón <decedion at gmail.com>:
>>
>> Yes, I've applied all kernel-patches from
>> http://buildbot.llvm.linuxfoundation.org/configs/x86_64/kernel-patches.tar.bz2
>> with 'bzcat ../kernel-patches.tar.bz2 | patch -p1':
>>
>> kernel/linux-3.17.4$ grep -i clang Makefile
>> ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
>> ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
>> COMPILER := clang
>> ifeq ($(COMPILER),clang)
>> CLANG_TARGET    := -target $(notdir $(CROSS_COMPILE:%-=%))
>> CLANG_GCC_TC    := -gcc-toolchain $(GCC_TOOLCHAIN)
>> CLANG_IA_FLAG    = -no-integrated-as
>> CLANG_FLAGS    := $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_IA_FLAG)
>> ifeq ($(COMPILER),clang)
>>
>> My relevant environment variables:
>>
>> LDFLAGS=-Wl,--as-needed -Wl,-s -Wl,-S -Wl,-O1 -Wl,--hash-style=gnu
>> -Wl,--sort-common
>> MAKEFLAGS=-s
>> CPPFLAGS=-m64 -fPIC -pipe -march=native -mtune=native -Ofast
>> -fomit-frame-pointer -fivopts -w -fno-math-errno
>> CXXFLAGS=-m64 -fPIC -pipe -march=native -mtune=native -Ofast
>> -fomit-frame-pointer -fivopts -w -fno-math-errno
>> CPP=clang-3.6 -E
>>
>> PATH=/home/simon/bin:usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:~/bin
>> HOSTCC=clang-3.6
>> LANG=es_ES.UTF-8
>> CONCURRENCY_LEVEL=9
>> CXX=clang++-3.6
>> CFLAGS=-m64 -fPIC -pipe -march=native -mtune=native -Ofast
>> -fomit-frame-pointer -fivopts -w -fno-math-errno
>> CC=clang-3.6
>>
>> The errors are:
>> In file included from
>> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs_64.c:17:
>> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:969:6:
>> warning: variable 'do_reloc' is used uninitialized
>>       whenever 'if' condition is false [-Wsometimes-uninitialized]
>>         if (!use_real_mode)
>>             ^~~~~~~~~~~~~~
>> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:981:14:
>> note: uninitialized use occurs here
>>         walk_relocs(do_reloc);
>>                     ^~~~~~~~
>> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:969:2:
>> note: remove the 'if' if its condition is always
>>       true
>>         if (!use_real_mode)
>>         ^~~~~~~~~~~~~~~~~~~
>> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:966:24:
>> note: initialize the variable 'do_reloc' to
>>       silence this warning
>>                         const char *symname);
>>                                             ^
>>                                              = NULL
>> 1 warning generated.
>> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:18:2: error:
>> unexpected token at start of statement
>>         DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
>>         ^
>> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18: note:
>> expanded from macro 'DEFINE'
>>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>                         ^
>> <inline asm>:2:2: note: instantiated into assembly here
>> @->NR_PAGEFLAGS $25 __NR_PAGEFLAGS
>>  ^
>> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:19:2: error:
>> unexpected token at start of statement
>>         DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
>>         ^
>> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18: note:
>> expanded from macro 'DEFINE'
>>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>                         ^
>> <inline asm>:2:2: note: instantiated into assembly here
>> @->MAX_NR_ZONES $4 __MAX_NR_ZONES
>>  ^
>> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:21:2: error:
>> unexpected token at start of statement
>>         DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
>>         ^
>> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18: note:
>> expanded from macro 'DEFINE'
>>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>                         ^
>> <inline asm>:2:2: note: instantiated into assembly here
>> @->NR_CPUS_BITS $8 ilog2(CONFIG_NR_CPUS)
>>  ^
>> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:23:2: error:
>> unexpected token at start of statement
>>         DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t));
>>         ^
>> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18: note:
>> expanded from macro 'DEFINE'
>>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>                         ^
>> <inline asm>:2:2: note: instantiated into assembly here
>> @->SPINLOCK_SIZE $4 sizeof(spinlock_t)
>>  ^
>> 4 errors generated.
>> make[4]: *** [kernel/bounds.s] Error 1
>> make[3]: *** [prepare0] Error 2
>> make[2]: *** [sub-make] Error 2
>> make[1]: *** [prepare] Error 2
>> make: ***
>> [/home/simon/fuentes/kernel/linux-3.17.4/debian/stamps/stamp-prepare-tree-i7]
>> Error 2
>>
>> 2014-11-26 16:23 GMT+01:00 Vinícius Tinti <viniciustinti at gmail.com>:
>>>
>>> On Wed, Nov 26, 2014 at 1:18 PM, Jan-Simon Moeller <dl9pf at gmx.de> wrote:
>>> > What version of clang do you use ?
>>> >
>>> > Am Mittwoch, 26. November 2014, 16:18:14 schrieb Juan Simón:
>>> >> Thanks.
>>> >> I have saved the 'makefile', I've disabled "AppArmor" and I have
>>> >> compiled
>>> >> again but it fails:
>>> >> In file included from
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs_64.c:17:
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:969:6:
>>> >> warning: variable 'do_reloc' is used uninitialized whenever 'if'
>>> >> condition
>>> >> is false
>>> >>       [-Wsometimes-uninitialized]
>>> >>         if (!use_real_mode)
>>> >>             ^~~~~~~~~~~~~~
>>> >>
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:981:14:
>>> >> note: uninitialized use occurs here
>>> >>         walk_relocs(do_reloc);
>>> >>                     ^~~~~~~~
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:969:2:
>>> >> note: remove the 'if' if its condition is always true
>>> >>         if (!use_real_mode)
>>> >>         ^~~~~~~~~~~~~~~~~~~
>>> >>
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/arch/x86/tools/relocs.c:966:24:
>>> >> note: initialize the variable 'do_reloc' to silence this warning
>>> >>                         const char *symname);
>>> >>                                             ^
>>> >>                                              = NULL
>>> >> 1 warning generated.
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:18:2: error:
>>> >> unexpected token at start of statement
>>> >>         DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
>>> >>         ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18:
>>> >> note:
>>> >> expanded from macro 'DEFINE'
>>> >>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>> >>                         ^
>>> >> <inline asm>:2:2: note: instantiated into assembly here
>>> >> @->NR_PAGEFLAGS $25 __NR_PAGEFLAGS
>>> >>  ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:19:2: error:
>>> >> unexpected token at start of statement
>>> >>         DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
>>> >>         ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18:
>>> >> note:
>>> >> expanded from macro 'DEFINE'
>>> >>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>> >>                         ^
>>> >> <inline asm>:2:2: note: instantiated into assembly here
>>> >> @->MAX_NR_ZONES $4 __MAX_NR_ZONES
>>> >>  ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:21:2: error:
>>> >> unexpected token at start of statement
>>> >>         DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
>>> >>         ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18:
>>> >> note:
>>> >> expanded from macro 'DEFINE'
>>> >>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>> >>                         ^
>>> >> <inline asm>:2:2: note: instantiated into assembly here
>>> >> @->NR_CPUS_BITS $8 ilog2(CONFIG_NR_CPUS)
>>> >>  ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/kernel/bounds.c:23:2: error:
>>> >> unexpected token at start of statement
>>> >>         DEFINE(SPINLOCK_SIZE, sizeof(spinlock_t));
>>> >>         ^
>>> >> /home/simon/fuentes/kernel/linux-3.17.4/include/linux/kbuild.h:5:18:
>>> >> note:
>>> >> expanded from macro 'DEFINE'
>>> >>         asm volatile("\n at ->" #sym " %0 " #val : : "i" (val))
>>> >>                         ^
>>> >> <inline asm>:2:2: note: instantiated into assembly here
>>> >> @->SPINLOCK_SIZE $4 sizeof(spinlock_t)
>>> >>  ^
>>> >> 4 errors generated.
>>> >>
>>> >> I'm compiling the 3.17.4 version.
>>> >>
>>> >> 2014-11-26 16:06 GMT+01:00 Jan-Simon Moeller <dl9pf at gmx.de>:
>>> >> > See this page:
>>> >> > http://llvm.linuxfoundation.org/index.php/Broken_kernel_options
>>> >> >
>>> >> > and i attached a fixed "makefile". forgot an argument.
>>> >> >
>>> >> > Best,
>>> >> > JS
>>> >> >
>>> >> > Am Mittwoch, 26. November 2014, 16:04:00 schrieb Jan-Simon Moeller:
>>> >> > > This is a known issue, disable apparmor.
>>> >> > >
>>> >> > > The construct used (shash structure layout) - we call it VLAIS
>>> >> > > (variable
>>> >> > > length array in struct) is not supported and the driver needs to
>>> >> > > be
>>> >> >
>>> >> > changed.
>>> >> >
>>> >> > > Patches welcome.
>>> >> > >
>>> >> > > Best,
>>> >> > > JS
>>> >> > >
>>> >> > > Am Mittwoch, 26. November 2014, 15:57:54 schrieb Juan Simón:
>>> >> > > > It doesn't compile:
>>> >> >
>>> >> > /home/simon/fuentes/kernel/linux-3.17.4/security/apparmor/crypto.c:35:2:
>>> >> > > > error: implicit declaration of function 'SHASH_DESC_ON_STACK'
>>> >> > > > [-Werror=implicit-function-declaration]
>>> >> > > >
>>> >> > > >   SHASH_DESC_ON_STACK(shash, apparmor_tfm);
>>> >> > > >   ^
>>> >> >
>>> >> >
>>> >> > /home/simon/fuentes/kernel/linux-3.17.4/security/apparmor/crypto.c:35:22:
>>> >> > > > error: 'shash' undeclared (first use in this function)
>>> >> > > >
>>> >> > > >   SHASH_DESC_ON_STACK(shash, apparmor_tfm);
>>> >> > > >
>>> >> > > >                       ^
>>> >> > > >
>>> >> > > > Is this a known bug? I haven't found it in bug tracker.
>>> >> > > > I've tested it with clang-3.5 and clang-3.6. Same error.
>>> >> > > >
>>> >> > > > 2014-11-26 13:12 GMT+01:00 Jan-Simon Moeller <dl9pf at gmx.de>:
>>> >> > > > > Am Mittwoch, 26. November 2014, 12:53:17 schrieb Juan Simón:
>>> >> > > > > > Hi,
>>> >> > > > > > I've followed the instructions on main page to compile the
>>> >> > > > > > kernel
>>> >> >
>>> >> > with
>>> >> >
>>> >> > > > > > clang on Ubuntu 14.04 64 bits:
>>> >> > > > > >    1. Get the latest SVN version of clang (version 3.5 from
>>> >> > > > > > PPA)
>>> >> > > > > >    2. Get the kernel pacthed from "git clone
>>> >> > > > > >    git://git.linuxfoundation.org/llvmlinux/kernel.git"
>>> >> > > > > >    3. Execute: "export HOSTCC=clang CC=clang"
>>> >> > > > >
>>> >> > > > > Exporting it in your shell environment might not end up in the
>>> >> > > > > build
>>> >> > > > > process
>>> >> > > > > with dpkg rules. Export it in the rules file maybe ?
>>> >> > > > >
>>> >> > > > >
>>> >> > > > > or create a "makefile" (little m !!!) in the toplevel
>>> >> > > > > kernel-dir
>>> >> > > > > with
>>> >> > > > > this
>>> >> > > > > content:
>>> >> > > > >
>>> >> > > > > #
>>> >> > > > >
>>> >> > > > > CC              := clang
>>> >> > > > > CPP             := $(CC) -E
>>> >> > > > > HOSTCC          := clang
>>> >> > > > > lm = $(MAKE) -f Makefile O="$(1)" CPP="$(CPP)" CC="$(CC)"
>>> >> > > > > HOSTCC="$(HOSTCC)"
>>> >> > > > >
>>> >> > > > > %:
>>> >> > > > >         @$(call lm,$(O),$@)
>>> >> > > > >
>>> >> > > > > all:
>>> >> > > > >         @$(call lm,$(O),$@)
>>> >> > > > >
>>> >> > > > > #
>>> >> > > > >
>>> >> > > > > >    4. From here I compile the kernel at Ubuntu way to obtain
>>> >> > > > > > DEB
>>> >> > > > >
>>> >> > > > > packages:
>>> >> > > > > >       1. I patched the kernel with the patches in
>>> >> >
>>> >> > http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-rc6-vivid/
>>> >> >
>>> >> > > > > >       2. cp /boot/config-`uname -r`
>>> >> > > > > >       debian.master/config/amd64/config.flavour.i7
>>> >> > > > > >       3. fakeroot debian/rules clean
>>> >> > > > > >       4. debian/rules editconfigs
>>> >> > > > > >       5. fakeroot debian/rules clean
>>> >> > > > > >       6. fakeroot debian/rules binary-headers binary-i7
>>> >> > > > >
>>> >> > > > > binary-arch-headers
>>> >> > > > >
>>> >> > > > > > I install the generated deb packages without problems.
>>> >> > > > > >
>>> >> > > > > > This i7 flavour it has:
>>> >> > > > > >
>>> >> > > > > > CONFIG_MCORE2=y
>>> >> > > > > >
>>> >> > > > > > and it's patched with:
>>> >> > > > > >
>>> >> > > > > > -cflags-$(CONFIG_MCORE2)        += -march=i686 $(call
>>> >> > > > > > tune,core2)
>>> >> > > > > > +cflags-$(CONFIG_MCORE2)        += -march=native $(call
>>> >> >
>>> >> > tune,native)
>>> >> >
>>> >> > > > > > My doubts are:
>>> >> > > > > >    1. Is this kernel really compiled with clang? The
>>> >> > > > > > compilation
>>> >> > > > > >    process
>>> >> > > > > >    shows in console a lot of warnings typical of clang but
>>> >> > > > > > when I
>>> >> > > > > >    execute
>>> >> > > > > >
>>> >> > > > > > "cat /proc/version", after reboot with the new kernel
>>> >> > > > > > version, it
>>> >> > > > > > shows:
>>> >> > > > > > "Linux version 3.18.0-031800rc6-i7 (root at X58A-UD5) (gcc
>>> >> > > > > > version
>>> >> >
>>> >> > 4.8.2
>>> >> >
>>> >> > > > > > (Ubuntu 4.8.2-19ubuntu1) )"
>>> >> > > > > >
>>> >> > > > > >    2. What's the kernel version in
>>> >> > > > > >    git://git.linuxfoundation.org/llvmlinux/kernel.git? In
>>> >> >
>>> >> > LLVMLinux
>>> >> >
>>> >> > > > > >    main
>>> >> > > > > >    page
>>> >> > > > > > <http://llvm.linuxfoundation.org/index.php/Main_Page> it
>>> >> >
>>> >> > says:
>>> >> > > > > >    "Alternatively you can use the LLVMLinux kernel tree
>>> >> > > > > > (recent
>>> >> > > > > >    mainline
>>> >> > > > > >
>>> >> > > > > > with latest LLVMLinux patches applied)" but when I execute
>>> >> > > > > > "debian/rules
>>> >> > > > > > editconfigs" it shows 3.17.0 in top of console and the git
>>> >> > > > > > page
>>> >> >
>>> >> > shows
>>> >> >
>>> >> > > > > > <http://git.linuxfoundation.org/llvmlinux/kernel.git/> that
>>> >> > > > > > the
>>> >> >
>>> >> > last
>>> >> >
>>> >> > > > > change
>>> >> > > > >
>>> >> > > > > > was at 15 Oct 2014.
>>> >> > >
>>> >> > > _______________________________________________
>>> >> > > LLVMLinux mailing list
>>> >> > > LLVMLinux at lists.linuxfoundation.org
>>> >> > > https://lists.linuxfoundation.org/mailman/listinfo/llvmlinux
>>> >> >
>>> >> > _______________________________________________
>>> >> > LLVMLinux mailing list
>>> >> > LLVMLinux at lists.linuxfoundation.org
>>> >> > https://lists.linuxfoundation.org/mailman/listinfo/llvmlinux
>>> >
>>> > _______________________________________________
>>> > LLVMLinux mailing list
>>> > LLVMLinux at lists.linuxfoundation.org
>>> > https://lists.linuxfoundation.org/mailman/listinfo/llvmlinux
>>>
>>> Have you applied the disable-clang-integrated-as.patch?
>>>
>>> http://git.linuxfoundation.org/?p=llvmlinux.git;a=blob;f=arch/all/patches/disable-clang-integrated-as.patch;h=4bde9a683525ce5c0aee0f46164d3028a167b445;hb=HEAD
>>>
>>> This output happens if you try to build the kernel with clang only
>>> (you still need gcc for the assembly part).
>>>
>>> --
>>> Simplicity is the ultimate sophistication
>>> _______________________________________________
>>> LLVMLinux mailing list
>>> LLVMLinux at lists.linuxfoundation.org
>>> https://lists.linuxfoundation.org/mailman/listinfo/llvmlinux
>>
>>
>

Could you pastebin 'git diff Makefile'?

-- 
Simplicity is the ultimate sophistication


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