Build fails under mingw

[4ifi]

c:\Users\Admin\Documents\caesium\caesium-clt\build>cmake .. -G "MinGW Makefiles"
-- The C compiler identification is GNU 8.1.0
-- The CXX compiler identification is GNU 8.1.0
-- Check for working C compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/gcc.exe
-- Check for working C compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/gcc.exe -- 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: C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/g++.exe
-- Check for working CXX compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin/g++.exe -- 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: C:/Users/Admin/Documents/caesium/caesium-clt/build

c:\Users\Admin\Documents\caesium\caesium-clt\build>mingw32-make
Scanning dependencies of target caesiumclt
[ 14%] Building C object src/CMakeFiles/caesiumclt.dir/vendor/optparse.c.obj
[ 28%] Building C object src/CMakeFiles/caesiumclt.dir/error.c.obj
[ 42%] Building C object src/CMakeFiles/caesiumclt.dir/helper.c.obj
C:\Users\Admin\Documents\caesium\caesium-clt\src\helper.c: In function
parse_arguments':
C:\Users\Admin\Documents\caesium\caesium-clt\src\helper.c:72:55: error: 'MAX_PATH' undeclared (first use in this function); did you mean 'MAX_PATH_SIZE'?
_fullpath(parameters.output_folder, opts.optarg, MAX_PATH);
^~~~~~~~
MAX_PATH_SIZE
C:\Users\Admin\Documents\caesium\caesium-clt\src\helper.c:72:55: note: each undeclared identifier is reported only once for each function it appears in
C:\Users\Admin\Documents\caesium\caesium-clt\src\helper.c: At top level:cc1.exe: warning: unrecognized command line option '-Wno-nullability-completeness'
mingw32-make[2]: *** [src\CMakeFiles\caesiumclt.dir\build.make:91: src/CMakeFiles/caesiumclt.dir/helper.c.obj] Error 1
mingw32-make[1]: *** [CMakeFiles\Makefile2:93: src/CMakeFiles/caesiumclt.dir/all] Error 2
mingw32-make: *** [Makefile:129: all] Error 2

c:\Users\Admin\Documents\caesium\caesium-clt\build>

[Lymphatus]

I was not able to get the build going on MinGW but it runs ok using MSYS. Can you try building from the MSYS console using cmake .. -G "MSYS Makefiles"?

I tested with MSYS, not MSYS2, but should not change much.