How to consume ORTools in a raw C++ makefile #4528
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Hello, I am able to consume ORTools (built from source) in a CMake project. However, I am having difficulty setting it up in a raw native makefile project. I currently have libortools.so in /usr/local/lib and the include files are in /usr/local/include/ortools When compiling a project which has OR Tools header files and source code, I obtain a bunch of the following compile time errors itself (so libortools.so is not yet into the picture): /usr/local/include/ortools/constraint_solver/routing.h:662:5: error: no matching function for call to ‘absl::lts_20240722::log_internal::LogMessageFatal::LogMessageFatal(const char [55], int, std::string&)’ Could you please direct me toward the right configuration for raw makefile consumption? Thank you. |
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Replies: 1 comment 1 reply
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I would generate the makefile with cmake and look at the c++ flags. Most likely you need the c++17 mode. |
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Thank you. That was indeed the issue. Bumping up to c++17 took care of the compile issue. Next were the linking issues. In addition to -lortools, I had to specify -lprotobuf and the project compiled and linked. https://groups.google.com/g/protobuf/c/S7cb-2r9UAU seems to suggest to include the full output of the pkg-config output, but -lprotobuf sufficed in my case. |
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I would generate the makefile with cmake and look at the c++ flags.
Most likely you need the c++17 mode.