Re: [contrack-tools PATCH] build: do not compile nfct if we disabled cttimeout

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On Fri, May 09, 2014 at 07:54:11PM +0800, Hangbin Liu wrote:
> On Fri, May 09, 2014 at 01:29:59PM +0200, Pablo Neira Ayuso wrote:
> > On Thu, May 08, 2014 at 06:02:25PM +0800, Hangbin Liu wrote:
> > > If we do not have libnetfilter_cttimeout and disabled cttimeout, conntrack-tools
> > > will compile fail because nfct.c include nfnetlink_cttimeout.h. Fix it by only
> > > compile nfct when we have enabled cttimeout
> > 
> > Strange. The nfnetlink_cttimeout.h file is cached inside the
> > conntrack-tools tree:
> > 
> > conntrack-tools/include/linux/netfilter/nfnetlink_cttimeout.h
> > 
> > Here this compiles fine with my current tree and using:
> > 
> > ./configure --prefix=/usr --disable-cthelper --disable-cttimeout
> > 
> > Please, investigate this issue a bit further.
> 
> That's weird, on my system without libnetfilter_cttimeout.
> # ./configure --prefix=/usr
> checking build system type... x86_64-unknown-linux-gnu
> checking host system type... x86_64-unknown-linux-gnu
> checking for a BSD-compatible install... /usr/bin/install -c
> checking whether build environment is sane... yes
> 
> <snip>
> 
> checking for LIBNETFILTER_CONNTRACK... yes
> checking for LIBNETFILTER_CTTIMEOUT... no
> configure: error: Package requirements (libnetfilter_cttimeout >= 1.0.0) were not met:
> 
> No package 'libnetfilter_cttimeout' found
> 
> Consider adjusting the PKG_CONFIG_PATH environment variable if you
> installed software in a non-standard prefix.
> 
> Alternatively, you may set the environment variables LIBNETFILTER_CTTIMEOUT_CFLAGS
> and LIBNETFILTER_CTTIMEOUT_LIBS to avoid the need to call pkg-config.
> See the pkg-config man page for more details.
> 
> # ./configure --prefix=/usr --disable-cthelper --disable-cttimeout
> 
> <snip>
> 
> config.status: executing depfiles commands
> config.status: executing libtool commands
> 
> conntrack-tools configuration:
>   userspace conntrack helper support:   no
>   conntrack timeout support:            no
> 
> # make
> Making all in extensions
> make[1]: Entering directory `/root/conntrack-tools/extensions'
>   CC       libct_proto_tcp.lo
>   CCLD     libct_proto_tcp.la
> 
> <snip>
> 
>   YACC     read_config_yy.c
> updating read_config_yy.h
>   CC       read_config_yy.o
>   LEX      read_config_lex.c
>   CC       read_config_lex.o
> read_config_lex.c: In function ‘yylex’:
> read_config_lex.c:2333:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>     for ( yyl = 0; yyl < yyleng; ++yyl )
>                        ^
> read_config_lex.c: In function ‘yy_scan_bytes’:
> read_config_lex.c:3658:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
>   for ( i = 0; i < _yybytes_len; ++i )
>                  ^
>   CC       stack.o
>   CCLD     conntrackd
>   CC       nfct.o
> nfct.c:26:59: fatal error: libnetfilter_cttimeout/libnetfilter_cttimeout.h: No such file or directory
>  #include <libnetfilter_cttimeout/libnetfilter_cttimeout.h>
>                                                            ^

OK, I see. That's not nfnetlink_cttimeout.h, it's
libnetfilter_cttimeout.h.

Let me check if I can come up with some alternative solution.
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