Undefined reference to operator new

mbyrne215_5241 0
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I'm trying to build a simple unit test executable, using cpputest. I've built the cpputest framework into a static library, and am now trying to link that into an executable. However, I'm tied into a fairly complicated Makefile setup, because of the related code.

This is my command line:

/usr/bin/qcc -V4.2.4,gcc_ntoarmle_acpp-ne -lang-c++ -O2 -g -g -o Application/UnitTests/Tests/symbols/UnitTestExe -Wl,--start-group Application/UnitTests/Tests/../.objs/main.o Application/UnitTests/lib/libcpputest.a -Wl,--end-group -lm

I'm getting many errors like the following:

 Application/UnitTests/lib/libcpputest.a(CommandLineTestRunner.o): In function `CommandLineTestRunner::parseArguments(TestPlugin*)':
   Application/UnitTests/cpputest/src/CppUTest/.objs/../CommandLineTestRunner.cpp:114: undefined reference to `operator new(unsigned int, char const*, int)'

I can't figure out what's causing this. Don't I get operator new for free with C++?

cpputest linker gcc c++
7 Answers

Maybe you're calling gcc, the C compiler instead of g++, which is the C++ compiler.

user_34148880

Like the original post, in my case this error happened while trying to link a software using CppUTest framework.

In my case, the source of the problem seems to be related to the fact I disabled the MEMORY_LEAK_DETECTION compile option of CppUTest. I enabled it again, which solved the problem.

user_24863320

Sometimes adding -lstdc++ is not enough. You should add it to the right place. For example I had list like this, not working:

target_link_libraries(cfr2 pthread m stdc++ "${CMAKE_SOURCE_DIR}/compressor/libcompressor.a" )

But this one works fine:

target_link_libraries(cfr2 pthread m "${CMAKE_SOURCE_DIR}/compressor/libcompressor.a" stdc++)

It'd be great if someone explained it in the comment section.

user_5170730
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