Halcompile: stdio.h no such file or directory

halcompile --install driver.c

make KBUILD_EXTRA_SYMBOLS=/usr/realtime-3.4-9-rtai-686-pae/modules/linuxcnc/Module.symvers -C /usr/src/linux-headers-3.4-9-rtai-686-pae SUBDIRS=`pwd` CC=gcc V=0 modules
make[1]: Entering directory `/usr/src/linux-headers-3.4-9-rtai-686-pae'
  CC [M]  /tmp/tmpqrHbhd/driver.o
/tmp/tmpqrHbhd/driver.c:13:19: fatal error: stdio.h: No such file or directory
compilation terminated.
make[4]: *** [/tmp/tmpqrHbhd/driver.o] Error 1
make[3]: *** [_module_/tmp/tmpqrHbhd] Error 2
make[2]: *** [sub-make] Error 2
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.4-9-rtai-686-pae'
make: *** [modules] Error 2

sudo halcompile --install --userspace driver.c

gcc -Os -g -I. -I/usr/realtime-3.4-9-rtai-686-pae/include -I. -I/usr/realtime-3.4-9-rtai-686-pae/include -I/usr/include/i386-linux-gnu -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -fno-math-errno -funsafe-math-optimizations -fno-rounding-math -fno-signaling-nans -fcx-limited-range -mhard-float -DRTAI=3 -fno-fast-math -mieee-fp -fno-unsafe-math-optimizations -DRTAPI -D_GNU_SOURCE -Drealtime -D__MODULE__ -I/usr/include/linuxcnc -Wframe-larger-than=2560 -URTAPI -U__MODULE__ -DULAPI -Os  -o driver /tmp/tmpNAGuWQ/driver.c -Wl,-rpath,/lib -L/lib -llinuxcnchal 
/usr/lib/gcc/i486-linux-gnu/4.7/../../../i386-linux-gnu/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
/tmp/ccwZbC2U.o: In function `rtapi_app_main':
/tmp/tmpNAGuWQ/driver.c:68: undefined reference to `hal_export_funct'
/tmp/tmpNAGuWQ/driver.c:75: undefined reference to `hal_export_funct'
collect2: error: ld returned 1 exit status
make: *** [driver] Error 1