Using nginx 1.1 with the intel compiler

Ryan Brown mp3geek at gmail.com
Sat Feb 25 03:17:18 UTC 2012 

Will try your suggestions..

[root at bob:auto/cc]# icc -v
icc version 12.1.3 (gcc version 4.6.0 compatibility)
[root at bob:auto/cc]# icc -V
Intel(R) C Compiler XE for applications running on IA-32, Version
12.1.3.293 Build 20120212
Copyright (C) 1985-2012 Intel Corporation.  All rights reserved.
FOR NON-COMMERCIAL USE ONL

2012/2/25 Maxim Dounin <mdounin at mdounin.ru>:
> Hello!
>
> On Sat, Feb 25, 2012 at 02:22:36PM +1300, Ryan Brown wrote:
>
>> Though it actually compiles to a point then errors... (ignoring the
>> -Wunused-value warnings)
>>
>> [root at bob:~/trunk]# export | grep cc
>> CC='icc  -I/usr/include/i386-linux-gnu/'
>> LD_LIBRARY_PATH=/opt/intel/composer_xe_2011_sp1.9.293/compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/ipp/../compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/ipp/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/mkl/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/tbb/lib/ia32//cc4.1.0_libc2.4_kernel2.6.16.21:/opt/intel/composer_xe_2011_sp1.9.293/debugger/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/mpirt/lib/ia32
>> LIBRARY_PATH=/opt/intel/composer_xe_2011_sp1.9.293/compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/ipp/../compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/ipp/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/compiler/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/mkl/lib/ia32:/opt/intel/composer_xe_2011_sp1.9.293/tbb/lib/ia32//cc4.1.0_libc2.4_kernel2.6.16.21
>> cc=icc
>> [root at bob:~/trunk]# icc --version
>> icc (ICC) 12.1.3 20120212
>> Copyright (C) 1985-2012 Intel Corporation.  All rights reserved.
>
> Could you please show "icc -v" and "icc -V" output?
>
> [...]
>
>> -I src/event/modules -I src/os/unix -I objs \
>>                 -o objs/src/core/ngx_string.o \
>>                 src/core/ngx_string.c
>> icc: command line warning #10006: ignoring unknown option '-Wunused-value'
>> src/core/ngx_string.c(1519): error: identifier "bool" is undefined
>>       (bool) state = 0;
>>        ^
>>
>> src/core/ngx_string.c(1519): error: expected a ";"
>>       (bool) state = 0;
>>              ^
>
> Note: this is *not* original nginx code.  There is no "(bool)"
> cast in nginx here, just plain assignment.
>
> With original code you'll get "error #188: enumerated type mixed
> with another type" as in your previous message, and this warning
> is expected to be disabled with icc, see auto/cc/icc:
>
> ...
> # enumerated type mixed with another type
> CFLAGS="$CFLAGS -wd188"
> ...
>
>> from a ./configure
>>
>> [root at bob:~/trunk]# ./configure
>> checking for OS
>>  + Linux 3.2.5-ck1 i686
>> checking for C compiler ... found
>>  + using GNU C compiler
>>  + gcc version: 4.6.0 compatibility)
>
> It looks like newer icc pretend to be compatible with gcc
> somewhere in "icc -v" output, and nginx incorrectly mishandles it
> as gcc as a result.
>
> Something like this should help:
>
> diff --git a/auto/cc/name b/auto/cc/name
> --- a/auto/cc/name
> +++ b/auto/cc/name
> @@ -64,16 +64,16 @@ if [ "$CC" = bcc32 ]; then
>     echo " + using Borland C++ compiler"
>
>  else
> +if `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then
> +    NGX_CC_NAME=icc
> +    echo " + using Intel C++ compiler"
> +
> +else
>  if `$CC -v 2>&1 | grep 'gcc version' >/dev/null 2>&1`; then
>     NGX_CC_NAME=gcc
>     echo " + using GNU C compiler"
>
>  else
> -if `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then
> -    NGX_CC_NAME=icc
> -    echo " + using Intel C++ compiler"
> -
> -else
>  if `$CC -V 2>&1 | grep 'Sun C' >/dev/null 2>&1`; then
>     NGX_CC_NAME=sunc
>     echo " + using Sun C compiler"
>
>
> Alternatively, you may set CFLAGS in the environment yourself,
> this will prevent nginx from setting them by it's own.  Something
> like
>
> CFLAGS="-W -g" ./configure
>
> should work.
>
>> But when it comes to compiling it uses icc (as above), the machine
>> does have gcc-4.6 installed also
>>
>> I didn't see any error messages in auto/cc/icc, I did noticed it
>> reference icc up to 11.x but not 12?
>
> We don't generally use icc, though occasionally check compilation
> if found one available.  There were no tests with 12.x yet, though
> it's likely will be ok once correctly detected.
>
> Maxim Dounin
>
>>
>>
>> 2012/2/25 Maxim Dounin <mdounin at mdounin.ru>:
>> > Hello!
>> >
>> > On Sat, Feb 25, 2012 at 12:48:34PM +1300, Ryan Brown wrote:
>> >
>> >> Any clues on this?
>> >
>> > It looks like you somehow persuaded nginx that your compiler is
>> > gcc, and it uses command line arguments appropiate for gcc instead
>> > of ones for icc.  See auto/cc/icc for a long list of warnings which
>> > should be ignored with icc.
>> >
>> > Maxim Dounin
>> >
>> >>
>> >> On Thu, Feb 23, 2012 at 10:36 AM, Ryan Brown <mp3geek at gmail.com> wrote:
>> >> > Okay, manage to get it to compile,
>> >> >
>> >> > make[1]: Entering directory `/root/trunk'
>> >> > /opt/intel/bin/icc -c -pipe  -O -W -Wall -Wpointer-arith
>> >> > -Wno-unused-parameter -Wunused-function -Wunused-variable
>> >> > -Wunused-value -Werror -g  -I src/core -I src/event -I
>> >> > src/event/modules -I src/os/unix -I objs \
>> >> >                -o objs/src/core/ngx_string.o \
>> >> >                src/core/ngx_string.c
>> >> > icc: command line warning #10006: ignoring unknown option '-Wunused-value'
>> >> > src/core/ngx_string.c(1519): error #188: enumerated type mixed with another type
>> >> >      state = 0;
>> >> >            ^
>> >> >
>> >> > compilation aborted for src/core/ngx_string.c (code 2)
>> >> > make[1]: *** [objs/src/core/ngx_string.o] Error 2
>> >>
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