UCRT_INCLUDE_FILE(stdio.h)

[shlwapi]

I'm on MSYS2 with cmake and ninja. Compiler is mingw-w64-x86_64-gcc. I followed the steps in INSTALL.md but was greeted with this fatal error: UCRTINCLUDE/stdio.h: No such file or directory. As I'm using MSYS2 I have no idea why this error involves MSVC at all.

[gozfree]

please show the complile error message.
My env is cmake with "Unix Makefiles", not "ninja"

[shlwapi]

please show the complile error message. My env is cmake with "Unix Makefiles", not "ninja"

I'm not on that computer anymore. The setup on the current machine is a bit different. There is no MSYS2 but only Clang (this Clang is also based on MinGW-W64 and uses MinGW-W64 libraries). CMake and Ninja are installed separately. But I can confirm the error message is almost the same as when on MSYS2.

[1/69] Building C object gear-lib/libposix/CMakeFiles/posix.dir/libposix.c.obj
FAILED: gear-lib/libposix/CMakeFiles/posix.dir/libposix.c.obj 
C:\upp\bin\clang\bin\cc.exe  -I../gear-lib/libposix/. -I../gear-lib/libposix/pthreads4w -I../gear-lib/libposix/MsvcLibX/include  -MD -MT gear-lib/libposix/CMakeFiles/posix.dir/libposix.c.obj -MF gear-lib\libposix\CMakeFiles\posix.dir\libposix.c.obj.d -o gear-lib/libposix/CMakeFiles/posix.dir/libposix.c.obj   -c ../gear-lib/libposix/libposix.c
In file included from ../gear-lib/libposix/libposix.c:23:
In file included from ../gear-lib/libposix/./libposix.h:45:
In file included from ../gear-lib/libposix/./libposix4win.h:25:
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:34:2: error: The msvclibx library is designed for use with the Microsoft Visual C/C++ tools only.
#error The msvclibx library is designed for use with the Microsoft Visual C/C++ tools only.
 ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:48:6: error: No msvclibx.lib version for this 64-bits OS.
#    error No msvclibx.lib version for this 64-bits OS.
     ^
In file included from ../gear-lib/libposix/libposix.c:23:
In file included from ../gear-lib/libposix/./libposix.h:45:
In file included from ../gear-lib/libposix/./libposix4win.h:27:
../gear-lib/libposix/MsvcLibX/include/stdio.h:33:10: error: pasting formed '/stdio', an invalid preprocessing token
#include UCRT_INCLUDE_FILE(stdio.h) /* Include MSVC's own <stdio.h> file */
         ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:128:83: note: expanded from macro 'UCRT_INCLUDE_FILE'
#define UCRT_INCLUDE_FILE(relpath) MSVCLIBX_STRINGIZE(MSVCLIBX_CONCAT(UCRTINCLUDE,MSVCLIBX_CONCAT(/,relpath))) /* C runtime library include files */
                                                                                  ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:123:30: note: expanded from macro 'MSVCLIBX_CONCAT'
#define MSVCLIBX_CONCAT(a,b) MSVCLIBX_CONCAT1(a,b) /* Substitute the arguments, then concatenate the values */
                             ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:122:32: note: expanded from macro 'MSVCLIBX_CONCAT1'
#define MSVCLIBX_CONCAT1(a,b) a##b /* Concatenate the raw arguments */
                               ^
In file included from ../gear-lib/libposix/libposix.c:23:
In file included from ../gear-lib/libposix/./libposix.h:45:
In file included from ../gear-lib/libposix/./libposix4win.h:27:
../gear-lib/libposix/MsvcLibX/include/stdio.h:33:10: error: pasting formed 'UCRTINCLUDE/', an invalid preprocessing token
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:128:55: note: expanded from macro 'UCRT_INCLUDE_FILE'
#define UCRT_INCLUDE_FILE(relpath) MSVCLIBX_STRINGIZE(MSVCLIBX_CONCAT(UCRTINCLUDE,MSVCLIBX_CONCAT(/,relpath))) /* C runtime library include files */
                                                      ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:123:30: note: expanded from macro 'MSVCLIBX_CONCAT'
#define MSVCLIBX_CONCAT(a,b) MSVCLIBX_CONCAT1(a,b) /* Substitute the arguments, then concatenate the values */
                             ^
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:122:32: note: expanded from macro 'MSVCLIBX_CONCAT1'
#define MSVCLIBX_CONCAT1(a,b) a##b /* Concatenate the raw arguments */
                               ^
In file included from ../gear-lib/libposix/libposix.c:23:
In file included from ../gear-lib/libposix/./libposix.h:45:
In file included from ../gear-lib/libposix/./libposix4win.h:27:
../gear-lib/libposix/MsvcLibX/include/stdio.h:33:10: fatal error: 'UCRTINCLUDE/stdio.h' file not found
#include UCRT_INCLUDE_FILE(stdio.h) /* Include MSVC's own <stdio.h> file */
         ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:128:36: note: expanded from macro 'UCRT_INCLUDE_FILE'
#define UCRT_INCLUDE_FILE(relpath) MSVCLIBX_STRINGIZE(MSVCLIBX_CONCAT(UCRTINCLUDE,MSVCLIBX_CONCAT(/,relpath))) /* C runtime library include files */
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:125:31: note: expanded from macro 'MSVCLIBX_STRINGIZE'
#define MSVCLIBX_STRINGIZE(x) MSVCLIBX_STRINGIZE1(x) /* Substitute the argument, then convert its value to a string */
                              ^~~~~~~~~~~~~~~~~~~~~~
../gear-lib/libposix/MsvcLibX/include/msvclibx.h:124:32: note: expanded from macro 'MSVCLIBX_STRINGIZE1'
#define MSVCLIBX_STRINGIZE1(x) #x /* Convert the raw argument to a string */
                               ^~
<scratch space>:4:1: note: expanded from here
"UCRTINCLUDE/stdio.h"
^~~~~~~~~~~~~~~~~~~~~
5 errors generated.
ninja: build stopped: subcommand failed.

[shlwapi]

Well, on libposix.h please have a look at this snippet:

/******************************************************************************
 * OS_LINUX
 ******************************************************************************/
#if defined (__linux__) || defined (__CYGWIN__)
#define OS_LINUX
#define GEAR_API __attribute__((visibility("default")))
#include "libposix4nix.h"

/******************************************************************************
 * OS_WINDOWS
 ******************************************************************************/
#elif defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
#define OS_WINDOWS
#define GEAR_API __declspec(dllexport)
#include "libposix4win.h"

You didn't cover MinGW (either the legacy MinGW or MinGW-W64), so it mistakenly thinks that it's building for MSVC. This expectation is wrong, so there is the errors above about the library is designed for use with the Microsoft Visual C/C++ tools only. You can check for MinGW-W64 with this macro __MINGW32__ (defined on both 64 bit and 32 bit MinGW-W64) or __MINGW64__ (defined on 64 bit MinGW-W64 only).

[shlwapi]

The check for OS_WINDOWS is problematic, __WIN32__ and WIN32 are of course defined on MinGW-W64 (which is true for any compilers targeting Windows environment). The check caused the confusion that it's MSVC is being used even though _MSC_VER is not defined.

[shlwapi]

Another possible situation is, you don't support MinGW-W64 based compilers at all. If it's the case please make it clear on README.md. Thanks.

[gozfree]

thank for your issue, hope you can send pull request and fix the porting problems on mingw/cygwin,