GL_INCDIRS incorrect/empty/...

Build type: /home/abuild/rpmbuild/BUILD/qtbase-opensource-src-5.5.0/mkspecs/linux-g++ (x86_64, CPU features: mmx sse sse2)   qmake vars .......... QMAKE_CFLAGS = -fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -DOPENSSL_LOAD_CONF QMAKE_CXXFLAGS = -fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -DOPENSSL_LOAD_CONF styles += mac fusion windows CONFIG += use_libmysqlclient_r QT_LIBS_DBUS = -ldbus-1 QT_CFLAGS_DBUS = -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include QT_HOST_CFLAGS_DBUS = -I/usr/include/dbus-1.0 -I/usr/lib64/dbus-1.0/include QT_CFLAGS_GLIB = -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include QT_LIBS_GLIB = -lgthread-2.0 -pthread -lglib-2.0 QT_CFLAGS_QGTKSTYLE = -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libdrm -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/atk-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include QT_LIBS_QGTKSTYLE = -lgobject-2.0 -lglib-2.0 QT_CFLAGS_QGTK2 = -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/libdrm -I/usr/include/libpng16 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/atk-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include QT_LIBS_QGTK2 = -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype QT_CFLAGS_PULSEAUDIO = -D_REENTRANT -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include QT_LIBS_PULSEAUDIO = -lpulse-mainloop-glib -lpulse -lglib-2.0 QMAKE_INCDIR_OPENGL = "/usr/include/libdrm" QMAKE_LIBDIR_OPENGL = QMAKE_LIBS_OPENGL = "-lGL" QMAKE_CFLAGS_OPENGL = QMAKE_CFLAGS_FONTCONFIG = -I/usr/include/freetype2 QMAKE_LIBS_FONTCONFIG = -lfontconfig -lfreetype QMAKE_INCDIR_LIBUDEV = QMAKE_LIBS_LIBUDEV = -ludev DEFINES += QT_NO_TSLIB QMAKE_X11_PREFIX = /usr QMAKE_CFLAGS_XKBCOMMON = -I/usr/include/pkg/libxkbcommon QMAKE_LIBS_XKBCOMMON = -lxkbcommon-x11 -lxkbcommon QMAKE_INCDIR_EGL = /usr/include/libdrm QMAKE_LIBS_EGL = -lEGL QMAKE_CFLAGS_EGL = QMAKE_CFLAGS_XCB = QMAKE_LIBS_XCB = -lxcb-sync -lxcb-xfixes -lxcb-randr -lxcb-render -lxcb-image -lxcb-shm -lxcb-keysyms -lxcb-icccm -lxcb-shape -lxcb INCLUDEPATH += "/usr/include/pgsql/" "/usr/include/pgsql/server" "/usr/include/mysql/" LIBS += -L"/usr/lib64" sql-drivers = sql-plugins = mysql odbc psql sqlite qmake switches ......... -d Build options: Configuration .......... accessibility accessibility-atspi-bridge alsa audio-backend avx avx2 c++11 clock-gettime clock-monotonic compile_examples concurrent cups dbus dbus-linked egl egl_x11 eglfs evdev eventfd fontconfig full-config getaddrinfo getifaddrs glib gtk2 gtkstyle iconv icu inotify ipv6ifname large-config largefile libudev linuxfb medium-config minimal-config mremap mtdev nis nostrip opengl openssl-linked png posix_fallocate pulseaudio qpa qpa reduce_exports reduce_relocations release shared small-config sse2 sse3 sse4_1 sse4_2 ssse3 system-freetype system-harfbuzz system-jpeg system-png system-sqlite system-zlib xcb xcb-glx xcb-plugin xcb-render xcb-sm xcb-xlib xinput2 xlib xrender Build parts ............ libs tools examples Mode ................... release Using sanitizer(s)...... none Using C++11 ............ yes Using gold linker....... no Using PCH .............. no Target compiler supports: SSE2/SSE3/SSSE3 ...... yes/yes/yes SSE4.1/SSE4.2 ........ yes/yes AVX/AVX2 ............. yes/yes Qt modules and options: Qt D-Bus ............... yes (linked to dbus-1) Qt Concurrent .......... yes Qt GUI ................. yes Qt Widgets ............. yes Large File ............. yes QML debugging .......... yes Use system proxies ..... no   Support enabled for: Accessibility .......... yes ALSA ................... yes CUPS ................... yes Evdev .................. yes FontConfig ............. yes FreeType ............... yes (system library) Glib ................... yes GTK theme .............. yes HarfBuzz ............... yes (system library) Iconv .................. yes ICU .................... yes Image formats: GIF .................. yes (plugin, using bundled copy) JPEG ................. yes (plugin, using system library) PNG .................. yes (in QtGui, using system library) journald ............... no mtdev .................. yes (system library) Networking: getaddrinfo .......... yes getifaddrs ........... yes IPv6 ifname .......... yes OpenSSL .............. yes (linked to the libraries) NIS .................... yes OpenGL / OpenVG: EGL .................. yes OpenGL ............... desktop OpenVG ............... no PCRE ................... system pkg-config ............. yes PulseAudio ............. yes QPA backends: DirectFB ............. no EGLFS ................ yes KMS .................. no LinuxFB .............. yes XCB .................. yes (system library) EGL on X ........... yes GLX ................ yes MIT-SHM ............ yes Xcb-Xlib ........... yes Xcursor ............ yes Xfixes ............. yes Xi ................. no Xi2 ................ yes Xinerama ........... yes Xrandr ............. yes Xrender ............ yes XKB ................ yes XShape ............. yes XSync .............. yes XVideo ............. yes Session management ..... yes SQL drivers: DB2 .................. no InterBase ............ no MySQL ................ yes (plugin) OCI .................. no ODBC ................. yes (plugin) PostgreSQL ........... yes (plugin) SQLite 2 ............. no SQLite ............... yes (plugin, using system library) TDS .................. no tslib .................. no udev ................... yes xkbcommon .............. yes (system library) zlib ................... yes (system library)