I’m using add_custom_command to generate a file, “bar.cc”. It would be convenient if I could say make bar.cc or make bar/bar.cc but neither of these work, and I can’t see a target in the Makefiles that I can use.
There is a way to make bar.cc.o, but not bar.cc 0 Wed 14:15:54 yost DaveBook ~/p/c++/cmake/target-for-generate 241 Z% bundle `findf *` [ find CMakeLists.txt bar foo.cc -type f ] #!/usr/bin/env unbundle # See http://yost.com/computers/bundle/ ======== CMakeLists.txt cmake_minimum_required(VERSION 3.2.1) project(yost-cmake-example) add_subdirectory(bar) add_executable (foo foo.cc) target_link_libraries(foo bar) ======== bar/bar.hh extern char* str1; ======== bar/CMakeLists.txt add_executable(genBar genBar.cc) add_custom_command( OUTPUT bar.cc COMMAND genBar > bar.cc DEPENDS genBar) add_library (bar SHARED bar.cc) target_include_directories(bar PUBLIC .) ======== bar/genBar.cc #include <iostream> int main(int argc, char** argv) { std::cout << "#include \"bar.hh\"\n\n" "char str1array[] = \"Hello!\";\n" "char* str1 = str1array;\n"; return 0; } ======== foo.cc #include <iostream> #include <bar.hh> int main(int argc, char** argv) { std::cout << str1 << std::endl; return 0; } ======== 0 Wed 14:15:57 yost DaveBook ~/p/c++/cmake/target-for-generate 242 Z% mkdir build 0 Wed 14:16:02 yost DaveBook ~/p/c++/cmake/target-for-generate 243 Z% cd build 0 Wed 14:16:03 yost DaveBook ~/p/c++/cmake/target-for-generate/build 244 Z% cmake .. -- The C compiler identification is AppleClang 6.0.0.6000057 -- The CXX compiler identification is AppleClang 6.0.0.6000057 -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- Generating done -- Build files have been written to: /Users/yost/p/c++/cmake/target-for-generate/build 0 Wed 14:16:07 yost DaveBook ~/p/c++/cmake/target-for-generate/build 245 Z% make Scanning dependencies of target genBar [ 14%] Building CXX object bar/CMakeFiles/genBar.dir/genBar.cc.o [ 28%] Linking CXX executable genBar [ 28%] Built target genBar [ 42%] Generating bar.cc Scanning dependencies of target bar [ 57%] Building CXX object bar/CMakeFiles/bar.dir/bar.cc.o [ 71%] Linking CXX shared library libbar.dylib [ 71%] Built target bar Scanning dependencies of target foo [ 85%] Building CXX object CMakeFiles/foo.dir/foo.cc.o [100%] Linking CXX executable foo [100%] Built target foo 0 Wed 14:16:09 yost DaveBook ~/p/c++/cmake/target-for-generate/build 246 Z% rm bar/bar.cc 0 Wed 14:16:15 yost DaveBook ~/p/c++/cmake/target-for-generate/build 247 Z% make bar/bar.cc make: *** No rule to make target `bar/bar.cc'. Stop. 2 Wed 14:16:24 yost DaveBook ~/p/c++/cmake/target-for-generate/build 248 Z% make bar.cc make: *** No rule to make target `bar.cc'. Stop. 2 Wed 14:16:27 yost DaveBook ~/p/c++/cmake/target-for-generate/build 249 Z% cd bar 0 Wed 14:19:20 yost DaveBook ~/p/c++/cmake/target-for-generate/build/bar 253 Z% make bar.cc make: *** No rule to make target `bar.cc'. Stop. 2 Wed 14:19:22 yost DaveBook ~/p/c++/cmake/target-for-generate/build/bar 254 Z% make bar.cc.o Generating bar.cc Building CXX object bar/CMakeFiles/bar.dir/bar.cc.o 0 Wed 14:19:25 yost DaveBook ~/p/c++/cmake/target-for-generate/build/bar 255 Z%
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