$ ../src/configure --target=x86_64-w64-mingw32
configure: loading site script /mingw64/etc/config.site
checking build system type... x86_64-w64-mingw32
checking host system type... x86_64-w64-mingw32
checking target system type... x86_64-w64-mingw32
checking for a BSD-compatible install... /usr/bin/install -c
checking whether ln works... yes
checking whether ln -s works... no, using cp -p
checking for a sed that does not truncate output... /mingw64/bin/sed
checking for gawk... gawk
checking for gcc... gcc
checking for C compiler default output file name... a.exe
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... .exe
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking whether g++ accepts -static-libstdc++ -static-libgcc... yes
checking for gnatbind... no
checking for gnatmake... no
checking whether compiler driver understands Ada... no
checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2
checking for objdir... .libs
checking for version 0.11 of ISL... no
checking for version 0.12 of ISL... no
checking for default BUILD_CONFIG...
checking for bison... bison -y
checking for bison... bison
checking for gm4... no
checking for gnum4... no
checking for m4... m4
checking for flex... flex
checking for flex... flex
checking for makeinfo... no
checking for expect... no
checking for runtest... no
checking for ar... ar
checking for as... as
checking for dlltool... dlltool
checking for ld... (cached) C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe
checking for lipo... no
checking for nm... nm
checking for ranlib... ranlib
checking for strip... strip
checking for windres... windres
checking for windmc... windmc
checking for objcopy... objcopy
checking for objdump... objdump
checking for readelf... readelf
checking for x86_64-w64-mingw32-cc... no
checking for cc... cc
checking for x86_64-w64-mingw32-c++... x86_64-w64-mingw32-c++
checking for x86_64-w64-mingw32-gcc... x86_64-w64-mingw32-gcc
checking for x86_64-w64-mingw32-gcj... no
checking for gcj... no
checking for x86_64-w64-mingw32-gfortran... no
checking for gfortran... no
checking for x86_64-w64-mingw32-gccgo... no
checking for gccgo... no
checking for x86_64-w64-mingw32-ar... no
checking for ar... ar
checking for x86_64-w64-mingw32-as... no
checking for as... as
checking for x86_64-w64-mingw32-dlltool... no
checking for dlltool... dlltool
checking for x86_64-w64-mingw32-ld... no
checking for ld... ld
checking for x86_64-w64-mingw32-lipo... no
checking for lipo... no
checking for x86_64-w64-mingw32-nm... no
checking for nm... nm
checking for x86_64-w64-mingw32-objdump... no
checking for objdump... objdump
checking for x86_64-w64-mingw32-ranlib... no
checking for ranlib... ranlib
checking for x86_64-w64-mingw32-readelf... no
checking for readelf... readelf
checking for x86_64-w64-mingw32-strip... no
checking for strip... strip
checking for x86_64-w64-mingw32-windres... no
checking for windres... windres
checking for x86_64-w64-mingw32-windmc... no
checking for windmc... windmc
checking where to find the target ar... just compiled
checking where to find the target as... just compiled
checking where to find the target cc... host tool
checking where to find the target c++... host tool
checking where to find the target c++ for libstdc++... host tool
checking where to find the target dlltool... just compiled
checking where to find the target gcc... host tool
checking where to find the target gcj... host tool
checking where to find the target gfortran... host tool
checking where to find the target gccgo... host tool
checking where to find the target ld... just compiled
checking where to find the target lipo... host tool
checking where to find the target nm... just compiled
checking where to find the target objdump... just compiled
checking where to find the target ranlib... just compiled
checking where to find the target readelf... just compiled
checking where to find the target strip... just compiled
checking where to find the target windres... just compiled
checking where to find the target windmc... just compiled
checking whether to enable maintainer-specific portions of Makefiles... no
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C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 1: unknown command: `C'
configure: creating ./config.status
C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 21: unknown option to `s'
configure: error: could not make ./config.status
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': not a valid identifier: unset: `tbaseargs
': not a valid identifier: unset: `temp
': not a valid identifier: unset: `tmp
': not a valid identifier: unset: `tooldir
': not a valid identifier: unset: `topsrcdir
': not a valid identifier: unset: `unsupported_languages
': not a valid identifier: unset: `use_gnu_as
': not a valid identifier: unset: `use_gnu_ld
': not a valid identifier: unset: `use_included_zlib
': not a valid identifier: unset: `varname
': not a valid identifier: unset: `verbose
': not a valid identifier: unset: `we_are_ok
': not a valid identifier: unset: `windows_tracing_flags
': not a valid identifier: unset: `windows_tracing_logfile
': not a valid identifier: unset: `with_build_time_tools
': not a valid identifier: unset: `with_gnu_as
': not a valid identifier: unset: `with_gnu_ld
': not a valid identifier: unset: `with_system_zlib
': not a valid identifier: unset: `x_includes
C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 1: unknown command: `C'
C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 14: unknown option to `s'
C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 14: unknown option to `s'
C:\msys64\mingw64\bin\sed.exe: -e expression #1, char 14: unknown option to `s'