A base repository for a project taht includes antlr4's C++ target as an external dependency
License: MIT License
Hello,
Because of some subtleties of CMake, it looks like this variable is actually not set when
add_executable(test_antlr main.cpp ${antlr4cpp_src_files_antlrcpptest}) is called. I think this is due to the fact that this variable is set at build time.
As a result, the linker will not be able to resolve references to TParser, etc. This can be seen with the following main.cpp:
#include <iostream>
#include <antlr4-runtime.h>
#include "TParser.h"
int main() {
std::cout << "Hello World" << std::endl;
antlrcpptest::TParser tp(nullptr);
return 0;
}
CMakeFiles/test_antlr.dir/main.cpp.o: In function `main':
main.cpp:(.text+0x53): undefined reference to `antlrcpptest::TParser::TParser(antlr4::TokenStream*)'
main.cpp:(.text+0x67): undefined reference to `antlrcpptest::TParser::~TParser()'
This seems to only be the case on a fresh build i.e. one where cmake .. has only been done once. The next time cmake is run this variable will be populated, and the build will succeed.
ON os I have downloaded the git repository the make. command goes well but man give this error:
Scanning dependencies of target antlr4cpp
[ 10%] Creating directories for 'antlr4cpp'
[ 20%] Performing download step (verify and extract) for 'antlr4cpp'
-- antlr4cpp download command succeeded. See also /Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-download-*.log
[ 30%] No patch step for 'antlr4cpp'
[ 40%] No update step for 'antlr4cpp'
[ 50%] Performing configure step for 'antlr4cpp'
-- antlr4cpp configure command succeeded. See also /Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-configure-*.log
[ 60%] Performing build step for 'antlr4cpp'
CMake Error at /Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-build-.cmake:49 (message):
Command failed: 2
'/Library/Developer/CommandLineTools/usr/bin/make'
See also
/Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-build-*.log
make[2]: *** [locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-build] Error 1
make[1]: *** [CMakeFiles/antlr4cpp.dir/all] Error 2
make: *** [all] Error 2
the error in log file is:
==> /Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-build-err.log <==
make[3]: *** No targets specified and no makefile found. Stop.
==> /Users/bisegni/sources/greeshift/antlr-4.7-cpp-cmake-base/locals/antlr4cpp/src/antlr4cpp-stamp/antlr4cpp-build-out.log <==
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