How to build docs/code?

[RealYukiSan]

I never use CMake previously, and just tried it on docs/code directory

I get the following error error while running cmake --build .:

-- summary of build options:
    Install prefix:  /usr/local
    Target system:   Linux
    Compiler:
      C compiler:    /usr/bin/cc (GNU)
      CFLAGS:         

-- Configuring done (0.1s)
-- Generating done (0.1s)
-- Build files have been written to: /home/reyuki/code/extern/libuv/docs/code
[  1%] Building C object build/CMakeFiles/uv_a.dir/src/fs-poll.c.o
[  2%] Building C object build/CMakeFiles/uv_a.dir/src/idna.c.o
[  2%] Building C object build/CMakeFiles/uv_a.dir/src/inet.c.o
[  3%] Building C object build/CMakeFiles/uv_a.dir/src/random.c.o
[  4%] Building C object build/CMakeFiles/uv_a.dir/src/strscpy.c.o
[  5%] Building C object build/CMakeFiles/uv_a.dir/src/strtok.c.o
[  6%] Building C object build/CMakeFiles/uv_a.dir/src/thread-common.c.o
[  6%] Building C object build/CMakeFiles/uv_a.dir/src/threadpool.c.o
[  7%] Building C object build/CMakeFiles/uv_a.dir/src/timer.c.o
[  8%] Building C object build/CMakeFiles/uv_a.dir/src/uv-common.c.o
[  9%] Building C object build/CMakeFiles/uv_a.dir/src/uv-data-getter-setters.c.o
[ 10%] Building C object build/CMakeFiles/uv_a.dir/src/version.c.o
[ 11%] Building C object build/CMakeFiles/uv_a.dir/src/unix/async.c.o
[ 11%] Building C object build/CMakeFiles/uv_a.dir/src/unix/core.c.o
[ 12%] Building C object build/CMakeFiles/uv_a.dir/src/unix/dl.c.o
[ 13%] Building C object build/CMakeFiles/uv_a.dir/src/unix/fs.c.o
[ 14%] Building C object build/CMakeFiles/uv_a.dir/src/unix/getaddrinfo.c.o
[ 15%] Building C object build/CMakeFiles/uv_a.dir/src/unix/getnameinfo.c.o
[ 15%] Building C object build/CMakeFiles/uv_a.dir/src/unix/loop-watcher.c.o
[ 16%] Building C object build/CMakeFiles/uv_a.dir/src/unix/loop.c.o
[ 17%] Building C object build/CMakeFiles/uv_a.dir/src/unix/pipe.c.o
[ 18%] Building C object build/CMakeFiles/uv_a.dir/src/unix/poll.c.o
[ 19%] Building C object build/CMakeFiles/uv_a.dir/src/unix/process.c.o
[ 19%] Building C object build/CMakeFiles/uv_a.dir/src/unix/random-devurandom.c.o
[ 20%] Building C object build/CMakeFiles/uv_a.dir/src/unix/signal.c.o
[ 21%] Building C object build/CMakeFiles/uv_a.dir/src/unix/stream.c.o
[ 22%] Building C object build/CMakeFiles/uv_a.dir/src/unix/tcp.c.o
[ 23%] Building C object build/CMakeFiles/uv_a.dir/src/unix/thread.c.o
[ 23%] Building C object build/CMakeFiles/uv_a.dir/src/unix/tty.c.o
[ 24%] Building C object build/CMakeFiles/uv_a.dir/src/unix/udp.c.o
[ 25%] Building C object build/CMakeFiles/uv_a.dir/src/unix/proctitle.c.o
[ 26%] Building C object build/CMakeFiles/uv_a.dir/src/unix/linux.c.o
[ 27%] Building C object build/CMakeFiles/uv_a.dir/src/unix/procfs-exepath.c.o
[ 27%] Building C object build/CMakeFiles/uv_a.dir/src/unix/random-getrandom.c.o
[ 28%] Building C object build/CMakeFiles/uv_a.dir/src/unix/random-sysctl-linux.c.o
[ 29%] Linking C static library libuv.a
[ 29%] Built target uv_a
[ 30%] Linking C executable cgi
/usr/bin/ld: cannot open output file cgi: Is a directory
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/cgi.dir/build.make:98: cgi] Error 1
make[1]: *** [CMakeFiles/Makefile2:180: CMakeFiles/cgi.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[bnoordhuis]

Are you trying to build in-tree? That won't work, try this instead:

$ mkdir build
$ cd build
$ cmake ..
$ make # or make -j$(getconf _NPROCESSORS_ONLN)

[RealYukiSan]

Are you trying to build in-tree? That won't work

but if you don't mind, can you explain why it won't work?

[bnoordhuis]

It's trying to compile a binary called cgi but a directory with that name already exists within docs/code. It probably would've worked on Windows, on that platform it builds cgi.exe.

[RealYukiSan]

I follow the same steps for windows (using msys2 mingw), but it says sys/socket.h no such file or directory, do I need setup additional stuff to make it works? I know there's no such thing like sys/socket.h in windows, as far as I know, they use winsock? but why the mingw using non-exists header file

$ cmake ..
-- The C compiler identification is GNU 13.2.0
-- The CXX compiler identification is GNU 13.2.0
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Detecting C compiler ABI info
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /ucrt64/bin/cc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /ucrt64/bin/CC.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test UV_LINT_W4
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_W4 - Failed
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER_MSVC - Failed
-- Performing Test UV_LINT_NO_CONDITIONAL_CONSTANT_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_CONDITIONAL_CONSTANT_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_NONSTANDARD_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_EMPTY_TU_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_NONSTANDARD_EMPTY_TU_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_FILE_SCOPE_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_NONSTANDARD_FILE_SCOPE_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_NONSTATIC_DLIMPORT_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_NONSTANDARD_NONSTATIC_DLIMPORT_MSVC - Failed
-- Performing Test UV_LINT_NO_HIDES_LOCAL
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_HIDES_LOCAL - Failed
-- Performing Test UV_LINT_NO_HIDES_PARAM
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_HIDES_PARAM - Failed
-- Performing Test UV_LINT_NO_HIDES_GLOBAL
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_HIDES_GLOBAL - Failed
-- Performing Test UV_LINT_NO_CONDITIONAL_ASSIGNMENT_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_CONDITIONAL_ASSIGNMENT_MSVC - Failed
-- Performing Test UV_LINT_NO_UNSAFE_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_UNSAFE_MSVC - Failed
-- Performing Test UV_LINT_WALL
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_WALL - Success
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER - Success
-- Performing Test UV_LINT_STRICT_PROTOTYPES
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_STRICT_PROTOTYPES - Success
-- Performing Test UV_LINT_EXTRA
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_EXTRA - Success
-- Performing Test UV_LINT_UTF8_MSVC
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_LINT_UTF8_MSVC - Failed
-- Performing Test UV_F_STRICT_ALIASING
System is unknown to cmake, create:
Platform/MINGW64_NT-10.0-19044 to use this system, please post your config file on discourse.cmake.org so it can be added to cmake
-- Performing Test UV_F_STRICT_ALIASING - Success
-- summary of build options:
    Install prefix:  /usr/local
    Target system:   MINGW64_NT-10.0-19044
    Compiler:
      C compiler:    /ucrt64/bin/cc.exe (GNU)
      CFLAGS:

-- Could NOT find CURL (missing: CURL_LIBRARY CURL_INCLUDE_DIR)
-- Configuring done (19.1s)
-- Generating done (2.3s)
-- Build files have been written to: /home/ZERO/libuv/docs/code/build

$ make
[  1%] Building C object build/CMakeFiles/uv_a.dir/src/fs-poll.c.obj
[  2%] Building C object build/CMakeFiles/uv_a.dir/src/idna.c.obj
[  3%] Building C object build/CMakeFiles/uv_a.dir/src/inet.c.obj
[  4%] Building C object build/CMakeFiles/uv_a.dir/src/random.c.obj
[  5%] Building C object build/CMakeFiles/uv_a.dir/src/strscpy.c.obj
[  6%] Building C object build/CMakeFiles/uv_a.dir/src/strtok.c.obj
[  7%] Building C object build/CMakeFiles/uv_a.dir/src/thread-common.c.obj
[  8%] Building C object build/CMakeFiles/uv_a.dir/src/threadpool.c.obj
[  9%] Building C object build/CMakeFiles/uv_a.dir/src/timer.c.obj
[  9%] Building C object build/CMakeFiles/uv_a.dir/src/uv-common.c.obj
[ 10%] Building C object build/CMakeFiles/uv_a.dir/src/uv-data-getter-setters.c.obj
[ 11%] Building C object build/CMakeFiles/uv_a.dir/src/version.c.obj
[ 12%] Building C object build/CMakeFiles/uv_a.dir/src/unix/async.c.obj
In file included from C:/msys64/home/ZERO/libuv/src/unix/async.c:26:
C:/msys64/home/ZERO/libuv/src/unix/internal.h:35:10: fatal error: sys/socket.h: No such file or directory
   35 | #include <sys/socket.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [build/CMakeFiles/uv_a.dir/build.make:244: build/CMakeFiles/uv_a.dir/src/unix/async.c.obj] Error 1
make[1]: *** [CMakeFiles/Makefile2:1582: build/CMakeFiles/uv_a.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[bnoordhuis]

cmake seems to think you're compiling for a unix platform, not sure why.

CMakeLists.txt checks if WIN32 is set. Apparently it's not.

[RealYukiSan]

Thank you for the reply. I have resolved the issue. It appears that the current installation of CMake does not support generating configurations for MinGW. I confirmed this by running cmake --help.

and installed a windows version of CMake solve the issue. There is also an alternative method though.