liblangtag issue on master

Hello


Following is the issue i am facing:

configure: creating ./config.status
config.status: creating Makefile
config.status: creating data/Makefile
config.status: creating docs/Makefile
config.status: creating docs/version.xml
config.status: creating extensions/Makefile
config.status: creating liblangtag/Makefile
config.status: creating liblangtag-gobject/Makefile
config.status: creating liblangtag.pc
config.status: creating liblangtag-uninstalled.pc
config.status: creating liblangtag-gobject.pc
config.status: creating liblangtag-gobject-uninstalled.pc
config.status: creating tests/Makefile
config.status: creating config.h
config.status: config.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands

========== Build Information ==========
 CFLAGS:
 LDFLAGS:
make[3]: Entering directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag'
/opt/lo/bin/make  all-recursive
make[4]: Entering directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag'
Making all in liblangtag
make[5]: Entering directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
/opt/lo/bin/make  all-recursive
make[6]: Entering directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
make[7]: Entering directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
  CC     liblangtag_la-lt-database.lo
  CC     liblangtag_la-lt-ext-module.lo
  CC     liblangtag_la-lt-extlang-db.lo
  CC     liblangtag_la-lt-extension.lo
lt-database.c
D:/src/libo/solver/wntmsci12.pro/inc\liblangtag/lt-error.h(25) : fatal  
error C1083: Cannot open include file: 'glib.h': No such file or directory
make[7]: *** [liblangtag_la-lt-database.lo] Error 1
make[7]: *** Waiting for unfinished jobs....
lt-ext-module.c
D:/src/libo/solver/wntmsci12.pro/inc\liblangtag/lt-error.h(25) : fatal  
error C1083: Cannot open include file: 'glib.h': No such file or directory
make[7]: *** [liblangtag_la-lt-ext-module.lo] Error 1
lt-extension.c
D:/src/libo/solver/wntmsci12.pro/inc\liblangtag/lt-ext-module-data.h(31) :  
fatal error C1083: Cannot open include file: 'glib.h': No such file or  
directory
lt-extlang.tmp.FAUCON.5964.pre.c
lt-extlang-db.c
make[7]: *** [liblangtag_la-lt-extension.lo] Error 1
make[7]: Leaving directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
make[6]: *** [all-recursive] Error 1
make[6]: Leaving directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
make[5]: *** [all] Error 2
make[5]: Leaving directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag/liblangtag'
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag'
make[3]: *** [all] Error 2
make[3]: Leaving directory  
`/cygdrive/d/src/libo/workdir/wntmsci12.pro/UnpackedTarball/langtag'
make[2]: ***  
[D:/src/libo/workdir/wntmsci12.pro/ExternalProject/langtag/build] Error 2
make[2]: Leaving directory `/cygdrive/d/src/libo/liblangtag'
make[1]: *** [liblangtag] Error 2
make[1]: Leaving directory `/cygdrive/d/src/libo'
make: *** [liblangtag] Error 2

I searched for glib.h and have found some. So I wanted to check for  
includes... Nice maze ! All is scattered between many makefiles.
The previous output is make verbose=t liblangtag from repo root. It does  
not display the compile commands that are executed. I hoped it would.

Could someone either:
- fix the issue
- explain me how to display the commandline (so I can get all arguments)  
when $CC or $CXX is invoked
- drive me on another way to fix the issue.

Thank you

Regards

--
Mat M