Error do_compile libepoxy

[Mathias Rudnik <rudnik.mathias@googlemail.com>]

Hello,

I am trying to build libepoxy but the do_compile tasks breaks.
I found following error messages in the logs:

arm-poky-linux-gnueabi-gcc -march=armv6 -mfpu=vfp -mfloat-abi=hard -mtune=arm1176jzf-s -mfpu=vfp --sysroot=/hdd_gold1/mathias/git/poky/rpi-build/tmp/work/arm1176jzfshf-vfp-poky-linux-gnueabi/libepoxy/1.4.3-r0/recipe-sysroot '-Itest/egl_common@sta' '-Itest' '-Iinclude/epoxy' '-I../libepoxy-1.4.3/test' '-Iinclude' '-I../libepoxy-1.4.3/include' '-Isrc' '-I../libepoxy-1.4.3/src' '-fdiagnostics-color=always' '-pipe' '-D_FILE_OFFSET_BITS=64' '-Wall' '-Winvalid-pch' '-std=gnu99' '-O2' '-g' '-O2' '-g' '-feliminate-unused-debug-types' '-fdebug-prefix-map=/hdd_gold1/mathias/git/poky/rpi-build/tmp/work/arm1176jzfshf-vfp-poky-linux-gnueabi/libepoxy/1.4.3-r0=/usr/src/debug/libepoxy/1.4.3-r0' '-fdebug-prefix-map=/hdd_gold1/mathias/git/poky/rpi-build/tmp/work/arm1176jzfshf-vfp-poky-linux-gnueabi/libepoxy/1.4.3-r0/recipe-sysroot-native=' '-fdebug-prefix-map=/hdd_gold1/mathias/git/poky/rpi-build/tmp/work/arm1176jzfshf-vfp-poky-linux-gnueabi/libepoxy/1.4.3-r0/recipe-sysroot=' '-lEGL' '-fPIC' '-Wpointer-arith' '-Wmissing-declarations' '-Wformat=2' '-Wstrict-prototypes' '-Wmissing-prototypes' '-Wnested-externs' '-Wbad-function-cast' '-Wold-style-definition' '-Wdeclaration-after-statement' '-Wunused' '-Wuninitialized' '-Wshadow' '-Wmissing-noreturn' '-Wmissing-format-attribute' '-Wredundant-decls' '-Wlogical-op' '-Werror=implicit' '-Werror=nonnull' '-Werror=init-self' '-Werror=main' '-Werror=missing-braces' '-Werror=sequence-point' '-Werror=return-type' '-Werror=trigraphs' '-Werror=array-bounds' '-Werror=write-strings' '-Werror=address' '-Werror=int-to-pointer-cast' '-Werror=pointer-to-int-cast' '-fno-strict-aliasing' '-Wno-int-conversion' '-MMD' '-MQ' 'test/egl_common@sta/egl_common.c.o' '-MF' 'test/egl_common@sta/egl_common.c.o.d' -o 'test/egl_common@sta/egl_common.c.o' -c ../libepoxy-1.4.3/test/egl_common.c
../libepoxy-1.4.3/test/egl_common.c: In function 'get_egl_display_or_skip':
../libepoxy-1.4.3/test/egl_common.c:36:5: error: unknown type name 'Display'; did you mean 'EGLDisplay'?
     Display *dpy = XOpenDisplay(NULL);
     ^~~~~~~
     EGLDisplay
../libepoxy-1.4.3/test/egl_common.c:36:20: error: implicit declaration of function 'XOpenDisplay'; did you mean 'eglGetDisplay'? [-Werror=implicit-function-declaration]
     Display *dpy = XOpenDisplay(NULL);
                    ^~~~~~~~~~~~
                    eglGetDisplay
../libepoxy-1.4.3/test/egl_common.c:36:20: warning: nested extern declaration of 'XOpenDisplay' [-Wnested-externs]
cc1: some warnings being treated as errors

Does anybody know what i am doing wrong?