Re: Can't build FreeBSD-head with CLANG

-- Eir Nym


On 29 August 2012 00:28, Dimitry Andric <dim_at_freebsd.org> wrote:
> On 2012-08-28 21:51, Eir Nym wrote:
>>
>> On 28 August 2012 22:49, Dimitry Andric <dim_at_freebsd.org> wrote:
>>>
>>> On 2012-08-28 18:31, Eir Nym wrote:
>>> What is the error you were getting on amd64?
>>
>> i386 never failed, amd64 — always
>
>
> Please post the *exact* error message, otherwise I will not be able to
> help you.
>

This one for example:
cc -c -O2 -pipe -fno-strict-aliasing  -std=c99  -Wall
-Wredundant-decls -Wnested-externs -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef
-Wno-pointer-sign -fformat-extensions  -Wmissing-include-dirs
-fdiagnostics-show-option  -Wno-error-tautological-compare
-Wno-error-empty-body  -Wno-error-parentheses-equality -nostdinc  -I.
-I/usr/head/src/sys -I/usr/head/src/sys/contrib/altq -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
-fno-omit-frame-pointer -mno-aes -mno-avx -mcmodel=kernel
-mno-red-zone -mno-mmx -mno-sse -msoft-float
-fno-asynchronous-unwind-tables -ffreestanding -fstack-protector
-Werror  /usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c
-I/usr/head/src/sys/gnu/fs/xfs/FreeBSD
-I/usr/head/src/sys/gnu/fs/xfs/FreeBSD/support
-I/usr/head/src/sys/gnu/fs/xfs
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: error: variable
'fbno' is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1492:11: note: uninitialized
use occurs here
        *fbnop = fbno;
                 ^~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:7: note: remove the 'if'
if its condition is always true
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: error: variable
'fbno' is used uninitialized whenever '&&' condition is false
[-Werror,-Wsometimes-uninitialized]
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1492:11: note: uninitialized
use occurs here
        *fbnop = fbno;
                 ^~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: note: remove the
'&&' if its condition is always true
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: error: variable
'fbno' is used uninitialized whenever '&&' condition is false
[-Werror,-Wsometimes-uninitialized]
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1492:11: note: uninitialized
use occurs here
        *fbnop = fbno;
                 ^~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: note: remove the
'&&' if its condition is always true
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: error: variable
'fbno' is used uninitialized whenever '&&' condition is false
[-Werror,-Wsometimes-uninitialized]
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1492:11: note: uninitialized
use occurs here
        *fbnop = fbno;
                 ^~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1449:11: note: remove the
'&&' if its condition is always true
        else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
                 ^~~~~~~~~~~~~~~~~~~~
/usr/head/src/sys/gnu/fs/xfs/xfs_alloc.c:1430:20: note: initialize the
variable 'fbno' to silence this warning
        xfs_agblock_t   fbno;
                            ^
                             = 0
4 errors generated.
*** [xfs_alloc.o] Error code 1