I have been trying to cross compile Mesa 13.0.6 and 12.0.6 for an arm platform. Both compilation is failing with the following error 
=============================
  Making all in gbm
  make[3]: Entering directory '/opt/qt/qt5.9.1arm_source/dependencies/mesa/mesa-13.0.6/src/gbm'
  CCLD     libgbm.la
  ../../src/loader/.libs/libloader.a(libxmlconfig_la-xmlconfig.o): In function `__getProgramName':
  xmlconfig.c:(.text+0x78): undefined reference to `__progname'
  collect2: error: ld returned 1 exit status
  Makefile:847: recipe for target 'libgbm.la' failed
  make[3]: *** [libgbm.la] Error 1
=============================