Required with glibc 2.26
when x11 is not in distro features it errors
out due to mising CLOCK_REALTIME

 error: 'CLOCK_REALTIME' undeclared (first use in this function);
did you mean '_XOPEN_REALTIME'?
    if (clock_gettime(CLOCK_REALTIME, &ts) == -1)
                      ^~~~~~~~~~~~~~
                      _XOPEN_REALTIME

Signed-off-by: Khem Raj <[email protected]>
---
 meta/recipes-graphics/glew/glew_2.0.0.bb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/recipes-graphics/glew/glew_2.0.0.bb 
b/meta/recipes-graphics/glew/glew_2.0.0.bb
index 1c93ca07b6..f2ab75629c 100644
--- a/meta/recipes-graphics/glew/glew_2.0.0.bb
+++ b/meta/recipes-graphics/glew/glew_2.0.0.bb
@@ -24,6 +24,7 @@ PACKAGECONFIG ?= "${@bb.utils.contains('DISTRO_FEATURES', 
'x11', 'opengl', 'egl-
 PACKAGECONFIG[opengl] = "SYSTEM='linux',,virtual/libx11 virtual/libgl libglu 
libxext libxi libxmu"
 PACKAGECONFIG[egl-gles2] = "SYSTEM='linux-egl' GLEW_NO_GLU='-DGLEW_NO_GLU' 
LDFLAGS.GL='-lEGL -lGLESv2',,virtual/egl virtual/libgles2"
 
+CFLAGS += "-D_GNU_SOURCE"
 # Override SYSTEM (via PACKAGECONFIG_CONFARGS) to avoid calling config.guess,
 # we're cross-compiling. Pass our CFLAGS via POPT as that's the optimisation
 # variable and safely overwritten.
-- 
2.13.0

-- 
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