Bootstrap failure on i686-pc-linux-gnu

[Mark Mitchell <mark at codesourcery dot com>]

I get:

  gcc -c  -DIN_GCC    -g -W -Wall -Wtraditional -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long  -DHAVE_CONFIG_H    -I. -I../../gcc -I../../gcc/config -I../../gcc/../include ../../gcc/cppfiles.c
  ../../gcc/cppfiles.c: In function `read_include_file':
  ../../gcc/cppfiles.c:277: warning: implicit declaration of function `getpagesize'
  ../../gcc/cppfiles.c: In function `purge_cache':
  ../../gcc/cppfiles.c:367: `caddr_t' undeclared (first use in this function)
  ../../gcc/cppfiles.c:367: (Each undeclared identifier is reported only once
  ../../gcc/cppfiles.c:367: for each function it appears in.)
  ../../gcc/cppfiles.c:367: parse error before `inc'
  ../../gcc/cppfiles.c:366: warning: empty body in an if-statement
  ../../gcc/cppfiles.c:367: warning: left-hand operand of comma expression has no effect
  ../../gcc/cppfiles.c:367: parse error before `)'

Under the version of glibc I have installed, caddr_t is only defined
if _BSD_SOURCE is defined when compiling.

I'm going to change this to a char*, and bootstrap like that.  Since
ggc-page.c uses char*, rather than caddr_t, that is probably good
enough.

--
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com