* c-cppbuiltin.c (c_cpp_builtins): Define __pic__ and __PIC__ when
	flag_pic is set.
	
	* config/alpha/freebsd.h, config/alpha/linux.h,
	config/arm/linux-elf.h, config/bfin/bfin.h,
	config/cris/linux.h, config/darwin.h, config/freebsd-spec.h,
	config/i386/beos-elf.h, config/i386/gnu.h,
	config/i386/linux.h, config/i386/linux64.h, config/i386/nto.h,
	config/i386/sco5.h, config/m32r/m32r.h, config/m68k/linux.h,
	config/m68k/m68k.h, config/mips/linux.h, config/pa/pa-linux.h,
	config/rs6000/linux64.h, config/rs6000/sysv4.h,
	config/rs6000/vxworks.h, config/s390/linux.h, config/s390/tpf.h,
	config/sh/linux.h, config/sh/sh.h, config/sol2.h,
	config/sparc/linux.h, config/sparc/linux64.h,
	config/xtensa/xtensa.h: Don't define __pic__ or __PIC__.

	* doc/invoke.texi: Document that the macros __pic__ and __PIC__
	are both defined when either flag -fpic or -fPIC are used.

From-SVN: r107347