Fails to build with LTO enabled

[dbermond]

Copperspice 1.7.3 fails to build for me with LTO enabled. Disabling LTO makes it to build fine. Error log:

[  7%] Linking CXX shared library ../../lib/libCsSql1.7.so

...

/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x20): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x788): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x8a0): undefined reference to `QAbstractItemModel::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0xac8): undefined reference to `QAbstractTableModel::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x17a0): undefined reference to `QAbstractItemModel::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x19c8): undefined reference to `QAbstractTableModel::metaObject() const'
/usr/bin/ld: /tmp/ccGk6fNj.ltrans0.ltrans.o:(.data.rel.ro+0x27b8): undefined reference to `QObject::metaObject() const'
collect2: error: ld returned 1 exit status
make[2]: *** [src/sql/CMakeFiles/CsSql.dir/build.make:339: lib/libCsSql1.7.so] Error 1
make[2]: Leaving directory '/build/copperspice/src/build'
make[1]: *** [CMakeFiles/Makefile2:738: src/sql/CMakeFiles/CsSql.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

...

[ 13%] Linking CXX shared library ../../lib/libCsScript1.7.so
make[2]: Leaving directory '/build/copperspice/src/build'
[ 13%] Built target lupdate
[ 13%] Linking CXX shared library ../../lib/libCsNetwork1.7.so
/usr/bin/ld: /tmp/ccGP8vHp.ltrans0.ltrans.o: in function `ctiVMThrowTrampoline':
<artificial>:(.text+0x4c): undefined reference to `cti_vm_throw'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans0.ltrans.o:(.data.rel.ro+0x8998): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans1.ltrans.o:(.data.rel.ro+0x3a8): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans8.ltrans.o:(.data.rel.ro+0x20): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans39.ltrans.o:(.data.rel.ro+0x70): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans39.ltrans.o:(.data.rel.ro+0x188): undefined reference to `QThread::metaObject() const'
/usr/bin/ld: /tmp/ccGP8vHp.ltrans39.ltrans.o:(.data.rel.ro+0x508): undefined reference to `QThread::metaObject() const'
collect2: error: ld returned 1 exit status
make[2]: *** [src/script/CMakeFiles/CsScript.dir/build.make:2931: lib/libCsScript1.7.so] Error 1
make[2]: Leaving directory '/build/copperspice/src/build'
make[1]: *** [CMakeFiles/Makefile2:712: src/script/CMakeFiles/CsScript.dir/all] Error 2
/usr/bin/ld: /tmp/ccaAfqHs.ltrans0.ltrans.o:(.data.rel.ro+0x1080): undefined reference to `QIODevice::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans0.ltrans.o:(.data.rel.ro+0x4cd8): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans1.ltrans.o:(.data.rel.ro+0x788): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans1.ltrans.o:(.data.rel.ro+0xb38): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans4.ltrans.o:(.data.rel.ro+0x3d0): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans4.ltrans.o:(.data.rel.ro+0x6a0): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans4.ltrans.o:(.data.rel.ro+0x990): more undefined references to `QObject::metaObject() const' follow
/usr/bin/ld: /tmp/ccaAfqHs.ltrans14.ltrans.o:(.data.rel.ro+0x148): undefined reference to `QIODevice::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans14.ltrans.o:(.data.rel.ro+0x3a8): undefined reference to `QIODevice::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans15.ltrans.o:(.data.rel.ro+0x90): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans16.ltrans.o:(.data.rel.ro+0x58): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans17.ltrans.o:(.data.rel.ro+0x1a0): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans22.ltrans.o:(.data.rel.ro+0x20): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans22.ltrans.o:(.data.rel.ro+0x138): undefined reference to `QNonContiguousByteDevice::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans25.ltrans.o:(.data.rel.ro+0x1a0): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans25.ltrans.o:(.data.rel.ro+0x2b8): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans27.ltrans.o:(.data.rel.ro+0x80): undefined reference to `QThreadPool::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans32.ltrans.o:(.data.rel.ro+0x38): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans32.ltrans.o:(.data.rel.ro+0x2c0): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans35.ltrans.o:(.data.rel.ro+0x80): undefined reference to `QObject::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans35.ltrans.o:(.data.rel.ro+0x198): undefined reference to `QSocketNotifier::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans35.ltrans.o:(.data.rel.ro+0x580): undefined reference to `QSocketNotifier::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans35.ltrans.o:(.data.rel.ro+0x6e0): undefined reference to `QSocketNotifier::metaObject() const'
/usr/bin/ld: /tmp/ccaAfqHs.ltrans35.ltrans.o:(.data.rel.ro+0x840): undefined reference to `QSocketNotifier::metaObject() const'
collect2: error: ld returned 1 exit status
make[2]: *** [src/network/CMakeFiles/CsNetwork.dir/build.make:1317: lib/libCsNetwork1.7.so] Error 1
make[2]: Leaving directory '/build/copperspice/src/build'
make[1]: *** [CMakeFiles/Makefile2:659: src/network/CMakeFiles/CsNetwork.dir/all] Error 2
make[1]: Leaving directory '/build/copperspice/src/build'
make: *** [Makefile:156: all] Error 2
make: Leaving directory '/build/copperspice/src/build'

Build options:

cmake -B build -S copperspice-cs-1.7.3 \
        -DCMAKE_BUILD_TYPE:STRING='None' \
        -DCMAKE_INSTALL_BINDIR:PATH='lib/copperspice/bin' \
        -DCMAKE_INSTALL_INCLUDEDIR:PATH='include/copperspice' \
        -DCMAKE_INSTALL_PREFIX:PATH='/usr' \
        -Wno-dev

Build flags:

CFLAGS: -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -fstack-clash-protection -fcf-protection -flto
CXXFLAGS: -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security -fstack-clash-protection -fcf-protection -Wp,-D_GLIBCXX_ASSERTIONS -flto
LDFLAGS: -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -flto

System information:

• Arch Linux x86_64
• gcc 11.1.0
• CMake 3.22.1

[bgeller]

As expected, CS builds with LTO disabled. Most likely the build machine exceeded the available memory.

Did you try this with a newer version of CopperSpice?

[dbermond]

The same error still persists with latest Copperspice 1.8.2 when building with LTO enabled.

This does not look like to be related to the available machine memory, otherwise the OOM killer would be triggered, which is not the case. And the error also occurs in a build server with 256GiB of RAM, which should be more than enough to build virtually anything.

[dbermond]

Also, the error is of type "undefined reference", which does any have any relation to the amount of available machine memory.

[bgeller]

We mentioned this because another user run out of memory building with LTO enabled. A CS team member is going to test this again.

[dbermond]

Thank you.

[bgeller]

We were able to repeat this behavior on Debian and it looks like something similar to an import/export issue. Trying a few things to see if it can be resolved easily.