[Bug bootstrap/55961] [4.8 Regression] system.h includes gmp.h but system.h is included for build and not just target

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55961



--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> 2013-01-14 16:05:48 UTC ---

We run configure for the build system in a subdirectory, when build != 

host.



# auto-host.h is the file containing items generated by autoconf and is

# the first file included by config.h.

# If host=build, it is correct to have bconfig include auto-host.h

# as well.  If host!=build, we are in error and need to do more 

# work to find out the build config parameters.

if test x$host = x$build

then

        build_auto=auto-host.h

else

        # We create a subdir, then run autoconf in the subdir.

        # To prevent recursion we set host and build for the new

        # invocation of configure to the build for this invocation

        # of configure. 

[...]