Re: CMake's PCH support and boost.test linker error

From: Olaf Peter (ope-devel_at_[hidden])
Date: 2021-03-04 18:41:55

of interest is the error message:

[ 25%] Linking CXX executable boost_utf_pch
/usr/bin/cmake -E cmake_link_script
CMakeFiles/boost_utf_pch.dir/link.txt --verbose=1
/usr/bin/c++ CMakeFiles/boost_utf_pch.dir/test_driver.cpp.o
CMakeFiles/boost_utf_pch.dir/test.cpp.o -o boost_utf_pch
/usr/lib64/libboost_unit_test_framework.so
/usr/bin/ld:
/usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/crt1.o: in
function `_start':
(.text+0x24): undefined reference to `main'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/boost_utf_pch.dir/build.make:141:
boost_utf_pch] Error 1
make[2]: Leaving directory '/home/olaf/work/CXX/boost_test_pch/build'
make[1]: *** [CMakeFiles/Makefile2:98: CMakeFiles/boost_utf_pch.dir/all]
Error 2
make[1]: Leaving directory '/home/olaf/work/CXX/boost_test_pch/build'
make: *** [Makefile:106: all] Error 2

and my system:

$ lsb_release -a
LSB Version:
:core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID:Â Â Â  Fedora
Description:Â Â Â  Fedora release 33 (Thirty Three)
Release:Â Â Â  33
Codename:Â Â Â  ThirtyThree

$ c++ --version
c++ (GCC) 10.2.1 20201125 (Red Hat 10.2.1-9)

Same problems with clang version 11.0.0 (Fedora 11.0.0-2.fc33)