glib 2.64.3 can not compile on Windows with msys2 + mingw-w64
the error is an incorect path in gio :
[349/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsubprocesslauncher.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsubprocesslauncher.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsubprocesslauncher.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[350/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketlistener.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketlistener.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketlistener.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[351/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gtcpconnection.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gtcpconnection.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gtcpconnection.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[352/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketoutputstream.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketoutputstream.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketoutputstream.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[353/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketconnection.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketconnection.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketconnection.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[354/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gtask.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gtask.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gtask.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[355/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketinputstream.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketinputstream.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketinputstream.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[356/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketclient.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketclient.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketclient.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[357/1002] Compiling C object gio/6ae6c9e@@gio-2.0@sha/gsocketcontrolmessage.c.obj
FAILED: gio/6ae6c9e@@gio-2.0@sha/gsocketcontrolmessage.c.obj
x86_64-w64-mingw32-gcc @gio/6ae6c9e@@gio-2.0@sha/gsocketcontrolmessage.c.obj.rsp
cc1.exe: error: C:/Documents/msys2/opt/ewpi_64include: No such file or directory [-Werror=missing-include-dirs]
cc1.exe: some warnings being treated as errors
[358/1002] Compiling C object gobject/6270cfe@@gobject-2.0@sha/gsignal.c.obj
ninja: build stopped: subcommand failed.
as you can see, there is no slash between 'ewpi_64' and 'include'.
I know that 2.64.1 was compiling flawlessly