[uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Erik Paulson]

I'm trying to build UML with VDE support turned on. However, I don't
have root on my host machine, so when I installed VDE I put it in a 
non-standard location. 

How do you pass extra -L and -I flags to the kernel build process? I
tried adding

make linux ARCH=um CFLAGS=-I/path/to/my/vde/include 
with no go, and I tried adding the include path to
HOSTCFLAGS in the top level Makefile rules, but that also didn't
work.

I got it to build by just sticking the right -I and -L flags in 
arch/um/drivers/Makefile

Is there another, more standard Linux kernel way that's equivalent to
./configure --with-package=/path/

Thanks,

-Erik


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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Jeff Dike]

On Thu, Nov 01, 2007 at 09:27:49PM -0500, Erik Paulson wrote:
> I'm trying to build UML with VDE support turned on. However, I don't
> have root on my host machine, so when I installed VDE I put it in a 
> non-standard location. 
> 
> How do you pass extra -L and -I flags to the kernel build process? I
> tried adding
> 
> make linux ARCH=um CFLAGS=-I/path/to/my/vde/include 
> with no go, and I tried adding the include path to
> HOSTCFLAGS in the top level Makefile rules, but that also didn't
> work.

How recent a kernel tree are you playing with?  This patch seems to do
what you want for CFLAGS -
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=52bcc3308ae3344266f55bf98a22c1ac0201eda7

It's been in mainline since 10/15.  I think we'd need to do something
similar for LFLAGS since the rest of the kernel doesn't care so much
about libraries.

				Jeff

-- 
Work email - jdike at linux dot intel dot com

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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Erik Paulson]

On Fri, Nov 02, 2007 at 11:51:31AM -0400, Jeff Dike wrote:
> On Thu, Nov 01, 2007 at 09:27:49PM -0500, Erik Paulson wrote:
> > I'm trying to build UML with VDE support turned on. However, I don't
> > have root on my host machine, so when I installed VDE I put it in a 
> > non-standard location. 
> > 
> > How do you pass extra -L and -I flags to the kernel build process? I
> > tried adding
> > 
> > make linux ARCH=um CFLAGS=-I/path/to/my/vde/include 
> > with no go, and I tried adding the include path to
> > HOSTCFLAGS in the top level Makefile rules, but that also didn't
> > work.
> 
> How recent a kernel tree are you playing with?  This patch seems to do
> what you want for CFLAGS -
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=52bcc3308ae3344266f55bf98a22c1ac0201eda7
> 

2.6.24-rc1 (2.6.23 plus the patch for rc1, plus the patch you mentioned on
the 25th:
   http://marc.info/?l=linux-kernel&m=119332492222601&q=raw

With basically just using 'defconfig' (I turned on VDE, but otherwise touched
nothing in menuconfig).

I used:
swingline(10)% gcc -v
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux
Thread model: posix
gcc version 3.4.6 20060404 (Red Hat 3.4.6-8)

running:
make linux ARCH=um CFLAGS=-I/scratch/epaulson/vde/include

I get:
<the below error message repeated many times>
  CC      arch/um/kernel/skas/mmu.o
In file included from include/asm/processor-generic.h:13,
                 from include/asm/processor.h:77,
                 from include/asm/thread_info.h:11,
                 from include/linux/thread_info.h:21,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:49,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from arch/um/kernel/skas/mmu.c:6:
include/asm/ptrace.h:50: warning: "struct user_fxsr_struct" declared inside parameter list
include/asm/ptrace.h:50: warning: its scope is only this definition or declaration, which is probably not what you want
include/asm/ptrace.h:52: warning: "struct user_fxsr_struct" declared inside parameter list
In file included from include/linux/timer.h:5,
                 from include/linux/sched.h:87,
                 from include/asm/pgtable.h:11,
                 from include/linux/mm.h:37,
                 from arch/um/kernel/skas/mmu.c:6:
include/linux/ktime.h: In function `ktime_set':
include/linux/ktime.h:84: warning: comparison is always false due to limited range of data type
/tmp/cc8wIDJP.s: Assembler messages:
/tmp/cc8wIDJP.s:485: Error: suffix or operands invalid for `dec'
/tmp/cc8wIDJP.s:496: Error: suffix or operands invalid for `dec'
make[2]: *** [arch/um/kernel/skas/mmu.o] Error 1
make[1]: *** [arch/um/kernel/skas] Error 2
make: *** [arch/um/kernel] Error 2

I'll try rc1-git11 this afternoon.

-Erik


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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Jeff Dike]

On Fri, Nov 02, 2007 at 11:22:44AM -0500, Erik Paulson wrote:
> include/asm/ptrace.h:50: warning: "struct user_fxsr_struct" declared inside parameter list
> include/asm/ptrace.h:50: warning: its scope is only this definition or declaration, which is probably not what you want
> include/asm/ptrace.h:52: warning: "struct user_fxsr_struct" declared inside parameter list

Humm.  Looks to me like you should be getting user_fxsr_struct into
ptrace.h as follows:
	defined in include/asm-x86/user_32.h
		included from include/asm-x86/user.h
		included from include/asm-um/user.h
		included from include/asm-um/ptrace-i386.h

The sticky point I suspect is the user_32.h, which depends on
__i386__, which Al Viro sent in patches removing.  However, it all
works here.

				Jeff

-- 
Work email - jdike at linux dot intel dot com

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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Jeff Dike]

On Fri, Nov 02, 2007 at 11:22:44AM -0500, Erik Paulson wrote:
> running:
> make linux ARCH=um CFLAGS=-I/scratch/epaulson/vde/include

This isn't going to help with the compilation problems, but the patch
below seems to pass LFLAGS from the command line through to ld nicely.

>   CC      arch/um/kernel/skas/mmu.o
> In file included from include/asm/processor-generic.h:13,
>                  from include/asm/processor.h:77,
>                  from include/asm/thread_info.h:11,
>                  from include/linux/thread_info.h:21,
>                  from include/linux/preempt.h:9,
>                  from include/linux/spinlock.h:49,
>                  from include/linux/mmzone.h:7,
>                  from include/linux/gfp.h:4,
>                  from include/linux/mm.h:8,
>                  from arch/um/kernel/skas/mmu.c:6:
> include/asm/ptrace.h:50: warning: "struct user_fxsr_struct" declared inside parameter list
> include/asm/ptrace.h:50: warning: its scope is only this definition or declaration, which is probably not what you want
> include/asm/ptrace.h:52: warning: "struct user_fxsr_struct" declared
> inside parameter list

Does this happen with plain old defconfig?

				Jeff

-- 
Work email - jdike at linux dot intel dot com

Index: linux-2.6.22/arch/um/Makefile
===================================================================
--- linux-2.6.22.orig/arch/um/Makefile	2007-10-25 12:23:05.000000000 -0400
+++ linux-2.6.22/arch/um/Makefile	2007-11-05 12:02:49.000000000 -0500
@@ -127,7 +127,9 @@ CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DST
 # The wrappers will select whether using "malloc" or the kernel allocator.
 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 
-CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
+LD_FLAGS_CMDLINE = $(foreach opt,$(LFLAGS),-Wl,$(opt))
+
+CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
 define cmd_vmlinux__
 	$(CC) $(CFLAGS_vmlinux) -o $@ \
 	-Wl,-T,$(vmlinux-lds) $(vmlinux-init) \

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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Erik Paulson]

On Mon, Nov 05, 2007 at 12:12:13PM -0500, Jeff Dike wrote:
> 
> >   CC      arch/um/kernel/skas/mmu.o
> > In file included from include/asm/processor-generic.h:13,
> >                  from include/asm/processor.h:77,
> >                  from include/asm/thread_info.h:11,
> >                  from include/linux/thread_info.h:21,
> >                  from include/linux/preempt.h:9,
> >                  from include/linux/spinlock.h:49,
> >                  from include/linux/mmzone.h:7,
> >                  from include/linux/gfp.h:4,
> >                  from include/linux/mm.h:8,
> >                  from arch/um/kernel/skas/mmu.c:6:
> > include/asm/ptrace.h:50: warning: "struct user_fxsr_struct" declared inside parameter list
> > include/asm/ptrace.h:50: warning: its scope is only this definition or declaration, which is probably not what you want
> > include/asm/ptrace.h:52: warning: "struct user_fxsr_struct" declared
> > inside parameter list
> 
> Does this happen with plain old defconfig?
> 

Yes, both with 2.6.24-rc1 and 2.6.24-rc1-git14. 

-git14 with defconfig and no CFLAGS builds fine.

-Erik

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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Erik Paulson]

On Mon, Nov 05, 2007 at 12:12:13PM -0500, Jeff Dike wrote:
> On Fri, Nov 02, 2007 at 11:22:44AM -0500, Erik Paulson wrote:
> > running:
> > make linux ARCH=um CFLAGS=-I/scratch/epaulson/vde/include
> 
> This isn't going to help with the compilation problems, but the patch
> below seems to pass LFLAGS from the command line through to ld nicely.
> 
> >   CC      arch/um/kernel/skas/mmu.o
> > In file included from include/asm/processor-generic.h:13,
> >                  from include/asm/processor.h:77,
> >                  from include/asm/thread_info.h:11,
> >                  from include/linux/thread_info.h:21,
> >                  from include/linux/preempt.h:9,
> >                  from include/linux/spinlock.h:49,
> >                  from include/linux/mmzone.h:7,
> >                  from include/linux/gfp.h:4,
> >                  from include/linux/mm.h:8,
> >                  from arch/um/kernel/skas/mmu.c:6:
> > include/asm/ptrace.h:50: warning: "struct user_fxsr_struct" declared inside parameter list
> > include/asm/ptrace.h:50: warning: its scope is only this definition or declaration, which is probably not what you want
> > include/asm/ptrace.h:52: warning: "struct user_fxsr_struct" declared
> > inside parameter list
> 
> Does this happen with plain old defconfig?
> 
> 				Jeff

Good news - this doesn't happen with 2.6.24-rc2. defconfig builds with
a CFLAGS on the commandline

Unfortunately, VDE still doesn't compile - the CFLAGS aren't being passed 
along to arch/um/drivers:

make linux ARCH=um CFLAGS=-I/scratch/epaulson/vde/include LDFLAGS=-L/scratch/epaulson/vde/lib V=1

<...>
make -f scripts/Makefile.build obj=arch/um/drivers
  gcc -Wp,-MD,arch/um/drivers/.vde_user.o.d  -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Os -D__arch_um__ -DSUBARCH=\"i386\" -Dvmap=kernel_vmap -Din6addr_loopback=kernel_in6addr_loopback -Din6addr_any=kernel_in6addr_any -DCONFIG_X86_32 -march=i686 -mpreferred-stack-boundary=2 -ffreestanding -D_LARGEFILE64_SOURCE  -fno-unit-at-a-time -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -Wdeclaration-after-statement -Iarch/um/include -I/scratch/epaulson/uml/linux-2.6.24-rc2/linux-2.6.23/arch/um/include/skas -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_LARGEFILE64_SOURCE  -c -o arch/um/drivers/vde_user.o arch/um/drivers/vde_user.c
arch/um/drivers/vde_user.c:8:24: libvdeplug.h: No such file or directory



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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Jeff Dike]

On Sun, Nov 11, 2007 at 01:47:16PM -0600, Erik Paulson wrote:
> Good news - this doesn't happen with 2.6.24-rc2. defconfig builds with
> a CFLAGS on the commandline

We seem to have cleared up the x86/kbuild breakage for now.

> Unfortunately, VDE still doesn't compile - the CFLAGS aren't being passed 
> along to arch/um/drivers:

Yeah, it's not obvious why - I need to look into this.

> make linux ARCH=um CFLAGS=-I/scratch/epaulson/vde/include LDFLAGS=-L/scratch/epaulson/vde/lib V=1

BTW, I misspelled LDFLAGS - you'll have to use LFLAGS until I fix this.

				Jeff

-- 
Work email - jdike at linux dot intel dot com

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Re: [uml-devel] building 2.6.24-rc1 with VDE in a non-standard location?

[Jeff Dike]

On Sun, Nov 11, 2007 at 01:47:16PM -0600, Erik Paulson wrote:
> Unfortunately, VDE still doesn't compile - the CFLAGS aren't being passed 
> along to arch/um/drivers:

Try the patch below - it works for me with fake CFLAGS and LDFLAGS on
the command line.  It also fixes the previous misspelling of LDFLAGS,
so you pass that, rather than LFLAGS, on the command line.

				Jeff

-- 
Work email - jdike at linux dot intel dot com

Index: linux-2.6.22/arch/um/Makefile
===================================================================
--- linux-2.6.22.orig/arch/um/Makefile	2007-11-14 12:58:04.000000000 -0500
+++ linux-2.6.22/arch/um/Makefile	2007-11-18 11:10:02.000000000 -0500
@@ -49,7 +49,7 @@ SYS_DIR		:= $(ARCH_DIR)/include/sysdep-$
 #
 # These apply to USER_CFLAGS to.
 
-KBUILD_CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\"	\
+KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
 	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap	\
 	-Din6addr_loopback=kernel_in6addr_loopback \
 	-Din6addr_any=kernel_in6addr_any
@@ -58,7 +58,7 @@ KBUILD_AFLAGS += $(ARCH_INCLUDE)
 
 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
 	$(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
-	-D_FILE_OFFSET_BITS=64
+	$(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64
 
 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
 
@@ -130,7 +130,7 @@ CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DST
 # The wrappers will select whether using "malloc" or the kernel allocator.
 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
 
-LD_FLAGS_CMDLINE = $(foreach opt,$(LFLAGS),-Wl,$(opt))
+LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
 
 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
 define cmd_vmlinux__

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