XKB.c:700: error: `X_kbPerClientFlags' undeclared (first use in this function)
XKB.c:703: error: `XkbUseCoreKbd' undeclared (first use in this function)
XKB.c:707: error: `rep' undeclared (first use in this function)
XKB.c: In function `XkbOpenDisplay':
XKB.c:740: error: `XkbMajorVersion' undeclared (first use in this function)
XKB.c:741: error: `XkbMinorVersion' undeclared (first use in this function)
XKB.c: In function `XkbComputeEffectiveMap':
XKB.c:449: warning: value computed is not used
make[3]: *** [XKB.lo] Error 1
make[3]: Leaving directory `/var/tmp/portage/libX11-1.0.1-r1/work/libX11-1.0.1/src/xkb'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/libX11-1.0.1-r1/work/libX11-1.0.1/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/var/tmp/portage/libX11-1.0.1-r1/work/libX11-1.0.1/src'
make: *** [all-recursive] Error 1

!!! ERROR: x11-libs/libX11-1.0.1-r1 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  ebuild.sh, line 1248:   Called x-modular_src_compile
  x-modular.eclass, line 327:   Called x-modular_src_make
  x-modular.eclass, line 322:   Called die

!!! emake failed
!!! If you need support, post the topmost build error, and the call stack if relevant.