Re: 11.0-CURRENT: SCTP_MAX_CWND, lib/libc/net/sctp_sys_calls.c -r279859 vs. updating to head snaphot -r280598

From: Michael Tuexen <tuexen_at_freebsd.org>
Date: Fri, 27 Mar 2015 10:17:48 -0500
> On 26 Mar 2015, at 21:36, Mark Millard <markmi_at_dsl-only.net> wrote:
> 
> Basic context:
> 
> # freebsd-version -ku; uname -apKU
> 11.0-CURRENT
> 11.0-CURRENT
> FreeBSD FBSDG5C0 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r279514M: Sat Mar 21 05:15:23 PDT 2015     root_at_FBSDG5C0:/usr/obj/usr/srcC/sys/GENERIC64vtsc-NODEBUG  powerpc powerpc64 1100062 1100062
> 
> 
> The problem:
> 
> Summary of the details that are listed later. Both of the following exist:
> 
> /usr/src/sys/netinet/sctp.h
> /usr/include/netinet/sctp.h
> 
> The first can be newer than the 2nd during buildworld.
> 
> The buildworld compile of /head/lib/libc/net/sctp_sys_calls.c from an updated /usr/src can/does end up using the second instead of the first, at least for the powerpc64-xtoolchain-gcc style of buildworld activity that I am trying.
> 
> The recent addition of SCTP_MAX_CWND ends up with its definition missing because of this: during the build /usr/include/netinet/sctp.h ends up being the file included and the compile fails from the missing additional definition.
> 
> Either the #include paths in /head/lib/libc/net/sctp_sys_calls.c or the command line arguments should force the /usr/src/sys/netinet/sctp.h vintage file to be found. The 3 netinet/ relevant includes are shown below...
> 
>> ...
>> #include <netinet/in.h>
>> #include <arpa/inet.h>
>> #include <netinet/sctp_uio.h>
>> #include <netinet/sctp.h>
> 
> More than sctp.h might have such issues since there are 3 netinet/ include paths in /head/lib/libc/net/sctp_sys_calls.c .
> 
> I have not checked for other .c files with similar issues for <netinet/...> usage during buildworld.
I guess there is something wrong with the build system / Makefiles such that the entries in the search
path for include files are in the wrong order. I don't think this is related to the concrete patch
you are referring to. It only exposes the problem. As I see, you experience similar problems in
other situations to.

Maybe someone knowing the build system has to look into it. And it seems to be somewhat platform specific,
since I have not observed this problem when testing the build on amd64 and arm.

Best regards
Michael
> 
> 
> The problem details:
> 
> /head/lib/libc/net/sctp_sys_calls.c -r279859 added:
> 
>> case SCTP_MAX_CWND:
>>     ((struct sctp_assoc_value *)arg)->assoc_id = id;
>>     break;
> 
> and head (20150325 r280598) contains it.
> 
> But the SCTP_MAX_CWND reference blocks buildworld (for at least /usr/local/bin/powerpc64-portbld-freebsd11.0-gcc (powerpc64-xtoolchain=gcc) use):
> 
>> /usr/local/bin/powerpc64-portbld-freebsd11.0-gcc -fpic -DPIC  -O2 -pipe   -I/usr/src/lib/libc/include -I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/powerpc64 -DNLS  -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -I/usr/src/lib/libc/../../contrib/libc-vis -DINET6 -I/usr/obj/usr/src/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE -DPOSIX_MISTAKE -I/usr/src/lib/libc/../libmd -I/usr/src/lib/libc/../../contrib/jemalloc/include -DMALLOC_PRODUCTION -I/usr/src/lib/libc/../../contrib/tzcode/stdtime -I/usr/src/lib/libc/stdtime  -I/usr/src/lib/libc/locale -DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP -DNS_CACHING -DSYMBOL_VERSIONING -DSYSCALL_COMPAT -std=gnu99 -fstack-protector -Wsystem-headers -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign   -c /usr/src/lib/libc/net/sctp_sys_calls.c -o sctp_sys_calls.So
>> 
>> /usr/src/lib/libc/net/sctp_sys_calls.c: In function 'sctp_opt_info':
>> /usr/src/lib/libc/net/sctp_sys_calls.c:386:7: error: 'SCTP_MAX_CWND' undeclared (first use in this function)
>>  case SCTP_MAX_CWND:
>       ^
> Looking to see where usage and definitions might be in /usr/src for -r280598 ...
> 
>> # pwd
>> /usr/src
>> $ find . \( -type d -name .svn -prune \) -or \( -type f -exec grep SCTP_MAX_CWND {} \; -print \) | more
>>        case SCTP_MAX_CWND:
>> ./lib/libc/net/sctp_sys_calls.c
>>        case SCTP_MAX_CWND:
>>        case SCTP_MAX_CWND:
>> ./sys/netinet/sctp_usrreq.c
>> #define SCTP_MAX_CWND                   0x00000032
>> ./sys/netinet/sctp.h
> 
> And looking at the list of includes in /head/lib/libc/net/sctp_sys_calls.c for -r279859 shows:
> 
>> #include <sys/cdefs.h>
>> __FBSDID("$FreeBSD$");
>> 
>> #include <stdio.h>
>> #include <string.h>
>> #include <errno.h>
>> #include <stdlib.h>
>> #include <unistd.h>
>> #include <sys/types.h>
>> #include <sys/socket.h>
>> #include <sys/errno.h>
>> #include <sys/syscall.h>
>> #include <sys/uio.h>
>> #include <netinet/in.h>
>> #include <arpa/inet.h>
>> #include <netinet/sctp_uio.h>
>> #include <netinet/sctp.h>
> 
> That there was no complaint about sctp.h being missing suggests that a <netinet/sctp.h> was found but did not contain a SCTP_MAX_CWND definition: so a different one than the above find/grep reported.
> 
> Using a find to report other sctp.h files shows:
> 
>> # find / \( -type d -name .svn -prune \) -or \( -type f -name sctp.h -print \) | more
>> /usr/src/sys/netinet/sctp.h
>> /usr/include/netinet/sctp.h
> 
> The diff of those shows the problem if the wrong file is found and used:
> 
>> # diff /usr/include/netinet/sctp.h /usr/src/sys/netinet/sctp.h
>> 34c34
>> < __FBSDID("$FreeBSD: head/sys/netinet/sctp.h 269945 2014-08-13 15:50:16Z tuexen $");
>> ---
>>> __FBSDID("$FreeBSD: head/sys/netinet/sctp.h 279859 2015-03-10 19:49:25Z tuexen $");
>> 130a131
>>> #define SCTP_MAX_CWND                   0x00000032
> 
> 
> 
> 
> Context details:
> 
>> make -j 8 CROSS_TOOLCHAIN=powerpc64-gcc 
>> WITHOUT_CLANG_BOOTSTRAP= WITHOUT_CLANG= WITHOUT_CLANG_IS_CC= \
>> WITHOUT_LLDB= \
>> WITH_GCC_BOOTSTRAP= WITH_GCC= WITHOUT_GNUCXX= \
>> WITHOUT_BOOT= WITHOUT_LIB32= \
>> buildworld buildkernel \
>> KERNCONF=GENERIC64vtsc-NODEBUG
>> TARGET=powerpc TARGET_ARCH=powerpc64
> 
>> # svnlite info /usr/src
>> Path: .
>> Working Copy Root Path: /usr/src
>> URL: https://svn0.us-west.freebsd.org/base/head
>> Relative URL: ^/head
>> Repository Root: https://svn0.us-west.freebsd.org/base
>> Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
>> Revision: 280615
>> Node Kind: directory
>> Schedule: normal
>> Last Changed Author: hselasky
>> Last Changed Rev: 280598
>> Last Changed Date: 2015-03-25 06:32:27 -0700 (Wed, 25 Mar 2015)
> 
> signals.h and pthread.h have been updated to more recent than -r280598 in order to avoid the __nonnull issues that exist as of -r280598.
> 
>> # svnlite st /usr/src --no-ignore
>> ?       /usr/src/.snap
>> ?       /usr/src/restoresymtable
>> M       /usr/src/sys/ddb/db_main.c
>> M       /usr/src/sys/ddb/db_script.c
>> ?       /usr/src/sys/powerpc/conf/GENERIC64vtsc
>> ?       /usr/src/sys/powerpc/conf/GENERIC64vtsc-NODEBUG
>> ?       /usr/src/sys/powerpc/conf/GENERICvtsc
>> ?       /usr/src/sys/powerpc/conf/GENERICvtsc-NODEBUG
>> M       /usr/src/sys/powerpc/ofw/ofw_machdep.c
>> M       /usr/src/sys/powerpc/ofw/ofwcall64.S
> 
> (The .c/.S changes are tied to a PowerMac-G5-specific boot-problem fix and getting information from early boot failures if I get any more. The GENERIC<?>'s remove ps3 in order to have both vt and sc at the same time.)
> 
>> # more /etc/src.conf 
>> NO_WERROR=
>> WITH_LIBCPLUSPLUS=
>> CC=/usr/local/bin/powerpc64-portbld-freebsd11.0-gcc
>> CXX=/usr/local/bin/powerpc64-portbld-freebsd11.0-g++
>> CPP=/usr/local/bin/powerpc64-portbld-freebsd11.0-cpp
>> CROSS_BINUTILS_PREFIX=/usr/local/powerpc64-freebsd/bin/
>> X_COMPILER_TYPE=gcc
>> CXXFLAGS+=-I/usr/obj/usr/srcC/tmp/usr/include/c++/v1/. -std=gnu++11 -L/usr/obj/usr/srcC/lib/libc++/.
>> CXXFLAGS+=-I/usr/include/c++/v1/. -std=gnu++11 -L/usr/lib/.
> 
> (The above and just below experiments with mostly(?) avoiding use of gcc 4.2.1, even for CC/CXX/CPP contexts.)
> 
>> # ls -FPal /usr/bin/g[+c]*
>> lrwxr-xr-x  1 root  wheel     48 Mar 20 02:03 /usr/bin/g++_at_ -> /usr/local/bin/powerpc64-portbld-freebsd11.0-g++
>> lrwxr-xr-x  1 root  wheel     48 Mar 19 04:20 /usr/bin/gcc_at_ -> /usr/local/bin/powerpc64-portbld-freebsd11.0-gcc
> 
>> # more /etc/make.conf
>> WRKDIRPREFIX=/usr/obj/portswork
>> #WITH_DEBUG=
>> MALLOC_PRODUCTION=
> 
> ===
> Mark Millard
> markmi at dsl-only.net
> 
> 
Received on Fri Mar 27 2015 - 14:17:55 UTC

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