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526f0abf6d
A default was set in the `"${build}" != "${host}"` case, but not in the
`"${build}" = "${host}"` case.
For a working build, this change should not make any difference. CPP_FOR_BUILD
is passed to build modules as CPP. If not set, autoconf macro AC_PROG_CC infers
CPP by trying various programs. First, it tries "$CC -E", which CPP will
default to in all cases with this patch.
The following command produces the same build directory with and without the
patch:
./configure --build=x86_64-make_autoconf_enable_cross_compiling-linux-gnu --host=x86_64-linux-gnu
The following command produces a Makefile containing `CPP_FOR_BUILD = ` without
the patch and containing `CPP_FOR_BUILD = $(CC_FOR_BUILD) -E` with the patch:
./configure
ChangeLog:
* configure.ac: Set default for CPP_FOR_BUILD environment variable in all cases.
* configure: Regenerate.
Signed-off-by: Manuel Jacob <me@manueljacob.de>
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