[syslog-ng] Building syslog with cmake as external project

Alexandre Santos alexandre.rosas.santos at gmail.com
Tue Nov 12 14:56:30 UTC 2019 

Hi Antal,

In deed, the problem was using "/usr" as a prefix, it was trying to install
in the development machine. I should use "usr", in other to copy the
installation to "DESTDIR/usr"

Cheers,
Alex



On Wed, Nov 6, 2019 at 7:38 AM Antal Nemes (anemes) <
Antal.Nemes at oneidentity.com> wrote:

> I think this is normal.
>
> Cmake tries to detect if struct cmsgcred is available in the system or
> not. This is done by generating a test file ("STRUCT_CMSGCRED.C") and try
> to compile it. If struct cmsgcred is not available the compilation will
> fail. If your cmake call does not work, I do not think this is the reason.
> I can see the exact same errors on my ubuntu xenial machine, and the
> compilation works for me.
>
> Br,
>   Antal
> ------------------------------
> *From:* syslog-ng <syslog-ng-bounces at lists.balabit.hu> on behalf of
> Alexandre Santos <alexandre.rosas.santos at gmail.com>
> *Sent:* Tuesday, November 5, 2019 15:42
> *To:* Syslog-ng users' and developers' mailing list <
> syslog-ng at lists.balabit.hu>
> *Subject:* Re: [syslog-ng] Building syslog with cmake as external project
>
> CAUTION: This email originated from outside of the organization. Do not
> follow guidance, click links, or open attachments unless you recognize the
> sender and know the content is safe.
>
> Hi Antal,
>
> Thank you for your feedback. I finally discovered the cmake variable
> equivalent for DESTDIR which is CMAKE_STAGING_PREFIX.
> So:
>
> set(EXEC_PREFIX "/usr")
>
> set(SYSLOG_NG_CMAKE_ARGS
>     ${CCACHE_LAUNCH_RULE}
>     -DCMAKE_INSTALL_PREFIX=${EXEC_PREFIX}
>     -DCMAKE_STAGING_PREFIX=${SYSLOG_NG_INSTALL_DIR}
>     )
>
> And then use this CMAKE_ARGS in the External project.
>
> Now I running into another issue:
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> *root at 5526d87140af:/thanos/src/target/build# cat
> /thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeError.log
> Determining size of struct cmsgcred failed with the following output:
> Change Dir:
> /thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeTmp
> Run Build Command:"/usr/bin/make" "cmTC_05392/fast" make[3]: Entering
> directory
> '/thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeTmp'
> /usr/bin/make -f CMakeFiles/cmTC_05392.dir/build.make
> CMakeFiles/cmTC_05392.dir/build make[4]: Entering directory
> '/thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeTmp'
> Building C object CMakeFiles/cmTC_05392.dir/STRUCT_CMSGCRED.c.o /usr/bin/cc
>  -D_GNU_SOURCE=1  -fPIE   -o CMakeFiles/cmTC_05392.dir/STRUCT_CMSGCRED.c.o
>   -c
> /thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c
> /thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:19:22:
> error: invalid application of 'sizeof' to incomplete type 'struct cmsgcred'
>  #define SIZE (sizeof(struct cmsgcred))                       ^
> /thanos/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:21:12:
> note: in expansion of macro 'SIZE'    ('0' + ((SIZE / 10000)%10)),
>     ^~~~
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:19:22:
> error: invalid application of 'sizeof' to incomplete type 'struct cmsgcred'
>  #define SIZE (sizeof(struct cmsgcred))                       ^
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:22:12:
> note: in expansion of macro 'SIZE'    ('0' + ((SIZE / 1000)%10)),
>   ^~~~
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:19:22:
> error: invalid application of 'sizeof' to incomplete type 'struct cmsgcred'
>  #define SIZE (sizeof(struct cmsgcred))                       ^
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:23:12:
> note: in expansion of macro 'SIZE'    ('0' + ((SIZE / 100)%10)),
>   ^~~~
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:19:22:
> error: invalid application of 'sizeof' to incomplete type 'struct cmsgcred'
>  #define SIZE (sizeof(struct cmsgcred))                       ^
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:24:12:
> note: in expansion of macro 'SIZE'    ('0' + ((SIZE / 10)%10)),
> ^~~~
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:19:22:
> error: invalid application of 'sizeof' to incomplete type 'struct cmsgcred'
>  #define SIZE (sizeof(struct cmsgcred))                       ^
> /home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CheckTypeSize/STRUCT_CMSGCRED.c:25:12:
> note: in expansion of macro 'SIZE'    ('0' +  (SIZE    % 10)),
> ^~~~ CMakeFiles/cmTC_05392.dir/build.make:65: recipe for target
> 'CMakeFiles/cmTC_05392.dir/STRUCT_CMSGCRED.c.o' failed make[4]: ***
> [CMakeFiles/cmTC_05392.dir/STRUCT_CMSGCRED.c.o] Error 1 make[4]: Leaving
> directory
> '/home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeTmp'
> Makefile:126: recipe for target 'cmTC_05392/fast' failed make[3]: ***
> [cmTC_05392/fast] Error 2 make[3]: Leaving directory
> '/home/src/target/build_sim_cc_x86_64/syslog-ng-ext/src/syslog-ng-ext-build/CMakeFiles/CMakeTmp'*
>
>
> It seems something related with the definition of __linux__ and
> __FreeBSD__.
>
> Can you help me?
>
> Thanks in advance,
> Alex
>
>
> On Tue, Nov 5, 2019 at 7:43 AM Antal Nemes (anemes) <
> Antal.Nemes at oneidentity.com> wrote:
>
>  Hi Alex,
>
> There are two concepts: CMAKE_INSTALL_PREFIX and DESTDIR, that I think you
> need to apply now.
>
> As a refresher, here is my understanding. CMAKE_INSTALL_PREFIX must be set
> to the directory, where the artifacts should reside in the custom os. That
> is most probably "/usr". That should set the the RPATH correctly.
>
> However, from packaging point of view, this causes a little trouble.
> Because when someone calls make install, the artifacts will be installed to
> CMAKE_INSTALL_PREFIX, merging the new files with the build OS files. And
> from that it is very hard to collect the artifacts properly.
>
> That is what DESTDIR is intended to resolve. Instead of calling make
> install, one needs to call make DESTDIR=<abs path to artifact directory>
> install. That will create the same structure that would have been created
> in CMAKE_INSTALL_PREFIX, just in $DESTDIR/$CMAKE_INSTALL_PREFIX. From that
> you can call targz or anything on the directory to collect the artifacts.
>
> For example: after
> $ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DENABLE_JAVA=no
> $ make -j
> $ mkdir /tmp/result
> $ make DESTDIR=/tmp/result install
>
> created a /tmp/result/usr/sbin/syslog-ng etc files, but with RPATH:
>
> $ objdump -x /tmp/result/usr/sbin/syslog-ng |grep RPATH
>   RPATH                /usr/lib
>
> as expected.
>
> I am afraid I do not know how to translate these into ExternalProject_add
> though.
>
> Br,
>   Antal
> ------------------------------
> *From:* syslog-ng <syslog-ng-bounces at lists.balabit.hu> on behalf of
> Alexandre Santos <alexandre.rosas.santos at gmail.com>
> *Sent:* Monday, November 4, 2019 19:40
> *To:* syslog-ng at lists.balabit.hu <syslog-ng at lists.balabit.hu>
> *Subject:* [syslog-ng] Building syslog with cmake as external project
>
> CAUTION: This email originated from outside of the organization. Do not
> follow guidance, click links, or open attachments unless you recognize the
> sender and know the content is safe.
>
> Hi All,
>
> I am trying to build syslog-ng with cmake to add it to a custom Linux
> distribution.
>
> The problem is that when the syslog-ng is compiled it gets the RPATH of
> the location where it has been generated:
>
> *root at 5526d87140af:/home/src/**chassisx/build# ldd
> syslog-ng-install/sbin/syslog-*
>
> *ng         linux-vdso.so.1 (0x00007fff151ed000)
> libsyslog-ng.so.3.24.1 => /home/src/target/build/**syslog-ng-install/lib/*
> *libsyslog-ng.so.3.24.1 (0x00007f81baf89000)         libeventlog.so =>
> /home/src/target/build/**syslog-ng-install/lib/*
> *libeventlog.so (0x00007f81bad84000)         libgmodule-2.0.so.0 =>
> /usr/lib/x86_64-linux-gnu/*
> *libgmodule-2.0.so.0 (0x00007f81bab80000)         libgthread-2.0.so.0 =>
> /usr/lib/x86_64-linux-gnu/*
> *libgthread-2.0.so.0 (0x00007f81ba97e000)         libglib-2.0.so.0 =>
> /lib/x86_64-linux-gnu/libglib-*
> *2.0.so.0 (0x00007f81ba66a000)         libivykis.so.0 =>
> /home/src/target/build/**syslog-ng-install/lib/*
> *libivykis.so.0 (0x00007f81ba45b000)         libpcre.so.3 =>
> /lib/x86_64-linux-gnu/libpcre.*
> *so.3 (0x00007f81ba1e8000)         libresolv.so.2 =>
> /lib/x86_64-linux-gnu/*
> *libresolv.so.2 (0x00007f81b9fd1000)         libssl.so.1.1 =>
> /usr/lib/x86_64-linux-gnu/*
> *libssl.so.1.1 (0x00007f81b9d65000)         libcrypto.so.1.1 =>
> /usr/lib/x86_64-linux-gnu/*
> *libcrypto.so.1.1 (0x00007f81b98cc000)         libsecret-storage.so =>
> /home/src/target/build/**syslog-ng-install/lib/*
> *libsecret-storage.so (0x00007f81b96c8000)         libpthread.so.0 =>
> /lib/x86_64-linux-gnu/*
> *libpthread.so.0 (0x00007f81b94ab000)         libc.so.6 =>
> /lib/x86_64-linux-gnu/libc.so.*
>
> *6 (0x00007f81b910c000)         /lib64/ld-linux-x86-64.so.2
> (0x00007f81bb48e000)         libdl.so.2 => /lib/x86_64-linux-gnu/libdl.**so.2
> (0x00007f81b8f08000)*
>
> I am using the cmake file in attachment.
>
> Can you help me?
> Thanks in advance,
>
> Alex
>
>
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