Determining if the function rl_filename_completion_function exists failed with the following output:
Change Dir: C:/msys64/home/philkode/monero/build/release/CMakeFiles/CMakeTmp

Run Build Command:"C:/msys64/usr/bin/make.exe" "cmTC_c5d30/fast"
make[1]: Entering directory '/home/philkode/monero/build/release/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_c5d30.dir/build.make CMakeFiles/cmTC_c5d30.dir/build
make[2]: Entering directory '/home/philkode/monero/build/release/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_c5d30.dir/CheckFunctionExists.c.obj

/C/msys64/mingw64/bin/x86_64-w64-mingw32-gcc.exe   -fno-strict-aliasing -maes -std=c11 -D_GNU_SOURCE -m64 -DWIN32_LEAN_AND_MEAN  -Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Wno-error=extra -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-unused-variable -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized -Wlogical-op -Wno-error=maybe-uninitialized -Wno-error=cpp -Wno-error=unused-value -Wno-error=unused-but-set-variable -Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes -march=x86-64  -fPIC  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -Wformat -Wformat-security -fstack-protector -fstack-protector-strong -fno-strict-aliasing -DCHECK_FUNCTION_EXISTS=rl_filename_completion_function   -o CMakeFiles/cmTC_c5d30.dir/CheckFunctionExists.c.obj   -c /C/msys64/mingw64/share/cmake-3.10/Modules/CheckFunctionExists.c
Linking C executable cmTC_c5d30.exe

/C/msys64/mingw64/bin/cmake.exe -E remove -f CMakeFiles/cmTC_c5d30.dir/objects.a
ar cr CMakeFiles/cmTC_c5d30.dir/objects.a "CMakeFiles/cmTC_c5d30.dir/CheckFunctionExists.c.obj"
/C/msys64/mingw64/bin/x86_64-w64-mingw32-gcc.exe  -fno-strict-aliasing -maes -std=c11 -D_GNU_SOURCE -m64 -DWIN32_LEAN_AND_MEAN  -Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Wno-error=extra -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-unused-variable -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized -Wlogical-op -Wno-error=maybe-uninitialized -Wno-error=cpp -Wno-error=unused-value -Wno-error=unused-but-set-variable -Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes -march=x86-64  -fPIC  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -Wformat -Wformat-security -fstack-protector -fstack-protector-strong -fno-strict-aliasing -DCHECK_FUNCTION_EXISTS=rl_filename_completion_function    -Wl,--whole-archive CMakeFiles/cmTC_c5d30.dir/objects.a -Wl,--no-whole-archive  -o cmTC_c5d30.exe -Wl,--major-image-version,0,--minor-image-version,0 /C/msys64/mingw64/lib/libreadline.a -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32
C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0xa3f): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0xb6d): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0xbcf): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0x1895): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0x2a27): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(display.o):(.text+0x2d21): more undefined references to `tputs' follow

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x20c): undefined reference to `tgetnum'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x2e9): undefined reference to `tgetnum'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x714): undefined reference to `tgetent'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x752): undefined reference to `tgetstr'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x7b3): undefined reference to `tgetflag'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x802): undefined reference to `tgetflag'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0x877): undefined reference to `tgetflag'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xaf7): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xba9): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xc17): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xc6d): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xc9d): undefined reference to `tputs'

C:/msys64/mingw64/lib/libreadline.a(terminal.o):(.text+0xce0): more undefined references to `tputs' follow

collect2.exe: error: ld returned 1 exit status

make[2]: *** [CMakeFiles/cmTC_c5d30.dir/build.make:100: cmTC_c5d30.exe] Error 1
make[2]: Leaving directory '/home/philkode/monero/build/release/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:126: cmTC_c5d30/fast] Error 2
make[1]: Leaving directory '/home/philkode/monero/build/release/CMakeFiles/CMakeTmp'