How to port code using sys/ioctl.h to MinGW gcc? - windows

Question

My codes (https://github.com/fangq/mmc, https://github.com/fangq/mcxcl) have been compiled out-of-box using gcc on Linux & Mac, cygwin-gcc or msys2-gcc on Windows, but not with MinGW compilers (x86-64-mingw64-* compilers for cygwin64, msys2, mingw64 or TDM-GCC, or matlab mingw64 support (mingw64 gcc 4.9.6)) because it complains that it misses a set of header files (sys/ioctl.h, ieee754.h etc), so I included a copy of these header files in my source code, and added -I./mingw64/include to make most of them compile
https://github.com/fangq/mmc/tree/master/src/mingw64/include
however, when compiling the matlab mex file using this script on MATLAB R2016/2018, I received the below error
Error using mex
mcx_utils.o: In function `mcx_progressbar':
D:/Users/fangq/Gitroot/Project/mmc/src/mcx_utils.c:1054: undefined reference to `ioctl'
collect2.exe: error: ld returned 1 exit status
I am wondering why compiling inside matlab and outside matlab are different. Is there a library that I can link to fix the undefined reference to "ioctl" error?
Here is the log when compiling using gcc on msys2:
fangq#zen:~/space/git/Project/mmc/src$ make mex
Building built/xorshift128p_rand.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/xorshift128p_rand.o xorshift128p_rand.c
Building built/simpmesh.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/simpmesh.o simpmesh.c
Building built/tettracing.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/tettracing.o tettracing.c
Building built/mcx_utils.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/mcx_utils.o mcx_utils.c
Building built/tictoc.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/tictoc.o tictoc.c
Building built/mmc.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/mmc.o mmc.c
Building built/cjson/cJSON.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/cjson/cJSON.o cjson/cJSON.c
Building built/mmc_host.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/mmc_host.o mmc_host.c
Building built/highordermesh.o
g++ -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/highordermesh.o highordermesh.cpp
Building built/mmc_cl_utils.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/mmc_cl_utils.o mmc_cl_utils.c
Building built/mmc_cl_host.o
cc -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -I../src -I"./mingw64/include" -o built/mmc_cl_host.o mmc_cl_host.c
Building bin/mmc
cmd //c mex.bat -v -f mexopts_msys2_gcc.xml COMPFLAGS='$COMPFLAGS -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT' LDFLAGS='$LDFLAGS -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp' -outdir ../mmclab mmclab.cpp -I../src -I"./mingw64/include" -output bin/mmc built/xorshift128p_rand.o built/simpmesh.o built/tettracing.o built/mcx_utils.o built/tictoc.o built/mmc.o built/cjson/cJSON.o built/mmc_host.o built/highordermesh.o built/mmc_cl_utils.o built/mmc_cl_host.o
Verbose mode is on.
... Looking for compiler 'MinGW64 Compiler (C++)' ...
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:/msys64/usr/').
... Looking for file 'C:\msys64\usr\bin\g++.exe' ...Yes.
... Looking for folder 'C:\msys64\usr' ...Yes.
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:/msys64/usr/').
... Executing command 'C:\msys64\usr\bin\g++ -dumpmachine' ...Yes ('x86_64-pc-msys').
Found installed compiler 'MinGW64 Compiler (C++)'.
Set PATH = C:\msys64\usr\bin;C:\Program Files\MATLAB\R2018a\extern\include\win64;C:\Program Files\MATLAB\R2018a\extern\include;C:\Program Files\MATLAB\R2018a\simulink\include;C:\Program Files\MATLAB\R2018a\lib\win64;.;C:\msys64\opt\local\bin;C:\msys64\usr\local\cuda\bin\;.;C:\msys64\pub\bin;C:\msys64\pub\pgi\linux86-64\18.4\bin;C:\msys64\mingw64\bin;C:\msys64\usr\local\bin;C:\msys64\usr\bin;C:\msys64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\msys64\usr\bin\site_perl;C:\msys64\usr\bin\vendor_perl;C:\msys64\usr\bin\core_perl;C:\msys64\usr\local\bin;C:\msys64\home\users\fangq\space\Download\MCXStudio;C;C:\Program Files\MATLAB\R2018a\bin;C:\msys64\usr\lib\gcc\x86_64-pc-msys\9.3.0\
Set INCLUDE = C:\msys64\usr\include;C:\msys64\usr\x86_64-pc-msys\include\c++;C:\msys64\usr\x86_64-pc-msys\include;C:\msys64\usr\x86_64-pc-msys\include\c++\x86_64-pc-msys;C:\msys64\usr\x86_64-pc-msys\include\c++\backward;
Set LIB = C:\msys64\usr\lib;;
Set MW_TARGET_ARCH = win64;
Set LIBPATH = C:\Program Files\MATLAB\R2018a\extern\lib\win64;
Options file details
-------------------------------------------------------------------
Compiler location: C:\msys64\usr
Options file: C:\msys64\home\fangq\space\git\Project\mmc\src\mexopts_msys2_gcc.xml
CMDLINE2 : C:\msys64\usr\bin\g++ -m64 -Wl,--no-undefined -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp -shared -static -s -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def" C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj "built/xorshift128p_rand.o" "built/simpmesh.o" "built/tettracing.o" "built/mcx_utils.o" "built/tictoc.o" "built/mmc.o" "built/cjson/cJSON.o" "built/mmc_host.o" "built/highordermesh.o" "built/mmc_cl_utils.o" "built/mmc_cl_host.o" -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -o C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.mexw64
CXX : C:\msys64\usr\bin\g++
COMPILER : C:\msys64\usr\bin\g++
DEFINES : -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE
MATLABMEX : -DMATLAB_MEX_FILE
CFLAGS : -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer
CXXFLAGS : -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer
INCLUDE : -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include"
CXXOPTIMFLAGS : -O -DNDEBUG
CXXDEBUGFLAGS : -g
LDXX : C:\msys64\usr\bin\g++
LINKER : C:\msys64\usr\bin\g++
LDFLAGS : -m64 -Wl,--no-undefined -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp
LDTYPE : -shared -static
LINKEXPORT : -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/mexFunction.def"
LINKEXPORTVER : -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def"
LIBLOC : C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64
LINKLIBS : -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat
LDOPTIMFLAGS : -s
LDDEBUGFLAGS : -g
OBJEXT : .obj
LDEXT : .mexw64
SETENV : set COMPILER=C:\msys64\usr\bin\gcc
set CXXCOMPILER=C:\msys64\usr\bin\g++
set COMPFLAGS=-c -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -DMATLAB_MEX_FILE
set CXXCOMPFLAGS=-c -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -DMATLAB_MEX_FILE
set OPTIMFLAGS=-O -DNDEBUG
set DEBUGFLAGS=-g
set LINKER=C:\msys64\usr\bin\gcc
set CXXLINKER=C:\msys64\usr\bin\g++
set LINKFLAGS=-m64 -Wl,--no-undefined -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp -shared -static -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/mexFunction.def"
set LINKDEBUGFLAGS=-g
set NAME_OUTPUT= -o "%OUTDIR%%MEX_NAME%%MEX_EXT%"
MINGWROOT : C:\msys64\usr
MINGWTARGET : x86_64-pc-msys
MATLABROOT : C:\Program Files\MATLAB\R2018a
ARCH : win64
SRC : "C:\msys64\home\fangq\space\git\Project\mmc\src\mmclab.cpp";"C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp"
OBJ : C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj;C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj
OBJS : C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj "built/xorshift128p_rand.o" "built/simpmesh.o" "built/tettracing.o" "built/mcx_utils.o" "built/tictoc.o" "built/mmc.o" "built/cjson/cJSON.o" "built/mmc_host.o" "built/highordermesh.o" "built/mmc_cl_utils.o" "built/mmc_cl_host.o"
SRCROOT : C:\msys64\home\fangq\space\git\Project\mmc\src\mmclab
DEF : C:\msys64\tmp\mex_1481040925092289_7396\mmc.def
EXP : "C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.exp"
LIB : "C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.lib"
EXE : C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.mexw64
ILK : "C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.ilk"
MANIFEST : "C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.mexw64.manifest"
TEMPNAME : C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc
EXEDIR : C:\msys64\home\fangq\space\git\Project\mmc\mmclab\
EXENAME : mmc
COMPFLAGS : -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT
OPTIM : -O -DNDEBUG
LINKOPTIM : -s
CMDLINE1_0 : C:\msys64\usr\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -O -DNDEBUG "C:\msys64\home\fangq\space\git\Project\mmc\src\mmclab.cpp" -o C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj
CMDLINE1_1 : C:\msys64\usr\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -O -DNDEBUG "C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp" -o C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj
-------------------------------------------------------------------
Building with 'MinGW64 Compiler (C++)'.
Warning: You are using an unsupported version of MinGW Compiler. To install the supported version of MinGW compiler, visit https://www.mathworks.com/help/matlab/matlab_external/install-mingw-support-package.html.
For a list of currently supported compilers see: https://www.mathworks.com/support/compilers.
C:\msys64\usr\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -O -DNDEBUG "C:\msys64\home\fangq\space\git\Project\mmc\src\mmclab.cpp" -o C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj
C:\msys64\usr\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -O -DNDEBUG "C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp" -o C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj
C:\msys64\usr\bin\g++ -m64 -Wl,--no-undefined -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp -shared -static -s -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def" C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj "built/xorshift128p_rand.o" "built/simpmesh.o" "built/tettracing.o" "built/mcx_utils.o" "built/tictoc.o" "built/mmc.o" "built/cjson/cJSON.o" "built/mmc_host.o" "built/highordermesh.o" "built/mmc_cl_utils.o" "built/mmc_cl_host.o" -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -o C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.mexw64
Recompile embedded version with '-DMATLAB_MEXCMD_RELEASE=R2017b'
C:\msys64\usr\bin\g++ -c -DMATLAB_DEFAULT_RELEASE=R2017b -DUSE_MEX_CMD -m64 -DMATLAB_MEX_FILE -I"..\src" -I".\mingw64\include" -I"C:\msys64\usr\usr\include" -I"C:\Program Files\MATLAB\R2018a/extern/include" -I"C:\Program Files\MATLAB\R2018a/simulink/include" -c -Wall -g -DMCX_EMBED_CL -fno-strict-aliasing -m64 -DMMC_USE_SSE -DHAVE_SSE2 -msse -msse2 -msse3 -mssse3 -msse4.1 -O3 -fopenmp -DMCX_CONTAINER -DUSE_OS_TIMER -DUSE_OPENCL -DMMC_XORSHIFT -fexceptions -fno-omit-frame-pointer -O -DNDEBUG "C:\Program Files\MATLAB\R2018a\extern\version\cpp_mexapi_version.cpp" -o C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj -DMATLAB_MEXCMD_RELEASE=R2017b
C:\msys64\usr\bin\g++ -m64 -Wl,--no-undefined -static -fopenmp "c:\Windows\System32\OpenCL.dll" -fopenmp -shared -static -s -Wl,"C:\Program Files\MATLAB\R2018a/extern/lib/win64/mingw64/exportsmexfileversion.def" C:\msys64\tmp\mex_1481040925092289_7396\mmclab.obj C:\msys64\tmp\mex_1481040925092289_7396\cpp_mexapi_version.obj "built/xorshift128p_rand.o" "built/simpmesh.o" "built/tettracing.o" "built/mcx_utils.o" "built/tictoc.o" "built/mmc.o" "built/cjson/cJSON.o" "built/mmc_host.o" "built/highordermesh.o" "built/mmc_cl_utils.o" "built/mmc_cl_host.o" -L"C:\Program Files\MATLAB\R2018a\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -o C:\msys64\home\fangq\space\git\Project\mmc\mmclab\mmc.mexw64
MEX completed successfully.
fangq#zen:~/space/git/Project/mmc/src$ which gcc
/usr/bin/gcc
fangq#zen:~/space/git/Project/mmc/src$ which g++
/usr/bin/g++
fangq#zen:~/space/git/Project/mmc/src$ which cc
/usr/bin/cc
fangq#zen:~/space/git/Project/mmc/src$ gcc --version
gcc (GCC) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Answer 1

What is the reason you included ioctl.h?
Copying that header from somewhere else is a bad idea. At best it will define functions for which libraries don't exist causing linker errors.
Typically you would need to use Windows alternatives for whatever IOCTL stuff you do on other platforms.
I tried to compile MMC on Windows with MSYS2 removing this include and the build succeeded:
patch -ulbf src/mcx_utils.c << EOF
## -35,3 +35,5 ##
#include <time.h>
+#ifndef _WIN32
#include <sys/ioctl.h>
+#endif
#include "mcx_utils.h"
EOF
sed -i.bak -e "s/^EXTRALIB\s*+*=.*$/& -Wl,--as-needed -lwinmm/" commons/Makefile_common.mk
~/buildstatus.sh build &&
make -Csrc CC=gcc PLATFORM=MINGW32 &&
echo Success