When compiling mesa after cloning:

git://anongit.freedesktop.org/mesa/mesa

and running:

./autogen.sh --prefix=$WLD --enable-gles2 --disable-gallium-egl \
      --with-egl-platforms=x11,wayland,drm --enable-gbm --enable-shared-glapi

compiling with make results in:

    make[3]: Entering directory `/home/rov/source/wayland/mesa/src/egl/main'
    gcc -c -I../../../include -I/home/rov/source/wayland/include -g -O2 -Wall -Wmissing-prototypes -std=c99 -ffast-math -fno-strict-aliasing -fPIC -DUSE_X86_64_ASM -D_GNU_SOURCE -DPTHREADS -DHAVE_POSIX_MEMALIGN -DGLX_INDIRECT_RENDERING -DGLX_DIRECT_RENDERING -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER -DHAVE_ALIAS -DHAVE_MINCORE -DHAVE_LIBUDEV -D__STDC_CONSTANT_MACROS -DHAVE_LLVM=0x0208 -fvisibility=hidden -D_EGL_OS_UNIX=1 -D_EGL_BUILT_IN_DRIVER_GLX -DHAVE_X11_PLATFORM -DHAVE_WAYLAND_PLATFORM -DHAVE_DRM_PLATFORM -D_EGL_NATIVE_PLATFORM=_EGL_PLATFORM_X11 -D_EGL_DRIVER_SEARCH_DIR=\"/home/rov/source/wayland/lib/egl\" egldisplay.c -o egldisplay.o
    egldisplay.c:55:17: fatal error: gbm.h: No such file or directory
    compilation terminated.
    make[3]: *** [egldisplay.o] Error 1
    make[3]: Leaving directory `/home/rov/source/wayland/mesa/src/egl/main'
    make[2]: *** [subdirs] Error 1
    make[2]: Leaving directory `/home/rov/source/wayland/mesa/src/egl'
    make[1]: *** [subdirs] Error 1
    make[1]: Leaving directory `/home/rov/source/wayland/mesa/src'
    make: *** [default] Fel 1



Something is wrong in src/egl/main/Makefile around here:

# egl_dri2 and egl_glx are built-ins
ifeq ($(filter dri2, $(EGL_DRIVERS_DIRS)),dri2)
LOCAL_CFLAGS += -D_EGL_BUILT_IN_DRIVER_DRI2
LOCAL_LIBS += $(TOP)/src/egl/drivers/dri2/libegl_dri2.a
ifneq ($(findstring x11, $(EGL_PLATFORMS)),)
EGL_LIB_DEPS += $(XCB_DRI2_LIBS)
endif
ifneq ($(findstring drm, $(EGL_PLATFORMS)),)
EGL_LIB_DEPS += -lgbm
INCLUDE_DIRS += -I$(TOP)/src/gbm/main
endif
EGL_LIB_DEPS += $(LIBUDEV_LIBS) $(DLOPEN_LIBS) $(LIBDRM_LIB) $(WAYLAND_LIBS)
endif


Moving:

EGL_LIB_DEPS += -lgbm
INCLUDE_DIRS += -I$(TOP)/src/gbm/main

outside of the if-statement makes the code compile successfully.