$ ./configure
checking awk... awk
detecting OS... MINGW
checking build system type... x86_64-w64-mingw32
checking host system type... x86_64-w64-mingw32
checking universal build... no
checking build cc... gcc
checking host cc... gcc
checking build c++... g++
checking host c++... g++
checking host windres... windres
checking strip... disabled
checking builtin depend... yes
checking makedepend... disabled
detecting cpu-type... 64 bits
detecting SSE... found
checking static... yes
checking unicode... yes
using debug level... no
using desync debug level... no
using link time optimization... no
checking OSX sysroot... not OSX, skipping
checking allegro... not found
checking sdl... not found
checking COCOA... not OSX, skipping
checking GDI video driver... found
checking dedicated... not selected
checking console application... disabled (only used when forced)
checking network... found
checking squirrel... found
checking translator... no
checking assert... enabled
checking zlib... found
checking liblzma... found
checking lzo2... found
checking libxdg-basedir... not found
checking libpng... not found
checking freetype2... not found
checking libfontconfig... WIN32, skipping
checking icu-lx... not found
checking icu-i18n... not found
checking psp-config... not PSP, skipping
checking libtimidity... not found
checking direct-music... not found
checking sort... sort
checking endianness... AUTO
suppress language errors... no
checking stripping... skipped
checking distcc... no (only used when forced)
checking ccache... no (only used when forced)
checking grfcodec... not found
checking nforenum... not found
checking OSX application bundle... not OSX, skipping
checking revision... no detection
WARNING: there is no means to determine the version.
WARNING: please use a subversion, mercurial, or git checkout of OpenTTD.
WARNING: you can only join game servers that have been compiled without
WARNING:   version detection.
WARNING: there is a great chance you desync.
WARNING: USE WITH CAUTION!
checking iconv... not OSX, skipping
personal home directory... OpenTTD
shared data directory... none
installation directory... /
icon theme directory... none
manual page directory... none
menu item directory... none
using CFLAGS_BUILD...  -Wall -Wno-multichar -Wsign-compare -Wundef -Wwrite-strings -Wpointer-arith -W -Wno-unused-parameter -Wredundant-decls -Wformat=2 -Wformat-security -Winit-self -fno-strict-aliasing -Wcast-qual -fno-strict-overflow -Wnon-virtual-dtor -Wno-free-nonheap-object -DMINGW -D_FORTIFY_SOURCE=2 -O1
using CXXFLAGS_BUILD...  -flifetime-dse=1 -std=gnu++14
using LDFLAGS_BUILD...  -static-libgcc -static-libstdc++
using CFLAGS... -O2 -fomit-frame-pointer  -Wall -Wno-multichar -Wsign-compare -Wundef -Wwrite-strings -Wpointer-arith -W -Wno-unused-parameter -Wredundant-decls -Wformat=2 -Wformat-security -Winit-self -fno-strict-aliasing -Wcast-qual -fno-strict-overflow -Wnon-virtual-dtor -Wno-free-nonheap-object -DMINGW -D_FORTIFY_SOURCE=2 -DWITH_SSE -mno-ms-bitfields -DWIN -DWITH_ZLIB -IR:/msys64/mingw64/include   -DWITH_LZMA -IR:/msys64/mingw64/include   -DLZMA_API_STATIC -DWITH_LZO -D_SQ64 -IR:/ottd/src/3rdparty/squirrel/include -DUNICODE -D_UNICODE -DENABLE_NETWORK -DWITH_PERSONAL_DIR -DPERSONAL_DIR=\\"OpenTTD\\" -DGLOBAL_DATA_DIR=\\"/usr/local/share/games/openttd\\"
using CXXFLAGS...  -flifetime-dse=1 -std=gnu++14
using LDFLAGS... -lstdc++ -lws2_32 -lwinmm -lgdi32 -ldxguid -lole32 -limm32 -LR:/msys64/mingw64/lib -lz   -LR:/msys64/mingw64/lib -llzma   /mingw/lib/liblzo2.a  -Wl,--subsystem,windows -static
Generating Makefile...
Generating lang/Makefile...
Generating setting/Makefile...
Generating grf/Makefile...
Generating objs/Makefile...