Don't bake all of CC/CPP/CXX into CFLAGS; filter out cross-compiler arguments

[ngie]

Summary

Don't bake all of CC/CPP/CXX into CFLAGS; filter out cross-compiler arguments

This change strips out all of the cross-compiler arguments, like -target, -B,
etc, so it doesn't infect the build.

MFC after: 12 days
X-MFC with: r305041
Sponsored by: EMC / Isilon Storage Division

Test Plan

$ pwd; make -VCFLAGS -VMAKEOBJDIRPREFIX
/mnt/lib/atf/libatf-c
-O2 -pipe -O2 -pipe   -DHAVE_CONFIG_H -DATF_BUILD_CC='"cc"' -DATF_BUILD_CFLAGS='"-O2 -O2 -DHAVE_CONFIG_H"' -DATF_BUILD_CPP='"cpp"' -DATF_BUILD_CPPFLAGS='""' -DATF_BUILD_CXX='"c++"' -DATF_BUILD_CXXFLAGS='"-O2 -O2 -DHAVE_CONFIG_H -O2"' -I/mnt/contrib/atf -I/mnt/lib/atf/libatf-c -I.  -std=gnu99 -fstack-protector-strong -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-uninitialized -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef  -Qunused-arguments 
/obj
$ make -s clean; make -s all -j12; /usr/local/bin/sudo -E make -s install DESTDIR=/wnw/
===> tests (clean)
===> tests/detail (clean)
===> tests (all)
===> tests/detail (all)
===> tests (install)
===> tests/detail (install)
$ chroot /wnw /bin/sh
# cd /usr/tests/lib/atf
# /usr/local/bin/kyua test
...

Results file id is usr_tests_lib_atf.20160901-003719-998724
Results saved to /root/.kyua/store/results.usr_tests_lib_atf.20160901-003719-998724.db

328/328 passed (0 failed)
#

[• rodrigc]

I say, let's try this out and give it a shot to shut up the test failures.
Nice investigatory work!

[• rodrigc]

Wow, this just is just NASTY.
Thanks for fixing this, please commit the fix ASAP.

[ngie]

In D7732#160510, @rodrigc wrote:

Wow, this just is just NASTY.
Thanks for fixing this, please commit the fix ASAP.

I'll wait 1-2 more hours for either bdrewery or jmmv to respond..

lib/atf/libatf-c/Makefile

30

Probably should add a comment as to why this is being done.

[ngie]

lib/atf/libatf-c/Makefile

31

This wouldn't work with ccache enabled :/..

[ngie]

• Omit CCACHE_BIN when building the ATF_BUILD_{CC,CPP,CXX} variables.
• Add commits noting why this logic is being added.

[bdrewery]

+1