powerpc (32-bit): error: statement with no effect at sys/net/iflib.c:1258 : #define iflib_netmap_txq_init(ctx, txq) (0)

[Mark Millard]

The following is more informational than anything as far
as I'm concerned. But there may be implications that I'm
unaware of. (I sometimes experiment with toolchain use
to see what the current status is for such use.)

In attempting to buildworld buildkernel via
powerpc-unknown-freebsd13.0-gcc9 (via amd64->powerpc
cross build):

--- all_subdir_iflib ---
/usr/src/sys/net/iflib.c:1258:41: error: statement with no effect [-Werror=unused-value]
 1258 | #define iflib_netmap_txq_init(ctx, txq) (0)
      |                                         ^
/usr/src/sys/net/iflib.c:2357:3: note: in expansion of macro 'iflib_netmap_txq_init'
 2357 |   iflib_netmap_txq_init(ctx, txq);
      |   ^~~~~~~~~~~~~~~~~~~~~

. . .

--- all_subdir_iflib ---
*** [iflib.o] Error code 1

make[4]: stopped in /usr/src/sys/modules/iflib
.ERROR_TARGET='iflib.o'
.ERROR_META_FILE='/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/iflib/iflib.o.meta'
.MAKE.LEVEL='4'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
_ERROR_CMD='/usr/local/bin/powerpc-unknown-freebsd13.0-gcc9 --sysroot=/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp -B/usr/local/powerpc-unknown-freebsd13.0/bin/  -O2 -pipe -fno-common  -fno-strict-aliasing -Werror -D_KERNEL -DKLD_MODULE -DKLD_TIED -nostdinc   -DHAVE_KERNEL_OPTION_HEADERS -include /usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG/opt_global.h -I. -I/usr/src/sys -I/usr/src/sys/contrib/ck/include -fno-common -g  -fPIC -mlongcall -fno-omit-frame-pointer -fdebug-prefix-map=./machine=/usr/src/sys/powerpc/include -I/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG     -mno-altivec -msoft-float -ffreestanding -fwrapv -fstack-protector -gdwarf-2 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions -Wmissing-include-dirs -fdiagnostics-show-option -Wno-unknown-pragmas -Wno-error=address -Wno-error=aggressive-loop-optimizations -Wno-error=array-bounds -Wno-error=attributes -Wno-error=cast-qual -Wno-error=enum-compare -Wno-error=inline -Wno-error=maybe-uninitialized -Wno-error=misleading-indentation -Wno-error=nonnull-compare -Wno-error=overflow -Wno-error=sequence-point -Wno-error=shift-overflow -Wno-error=tautological-compare -Wno-unused-but-set-variable -Wno-error=stringop-overflow -Wno-error=memset-elt-size -Wno-error=packed-not-aligned -Wno-address-of-packed-member -Wno-format-zero-length   -v -finline-limit=15000 -fms-extensions --param inline-unit-growth=100 --param large-function-growth=1000  -std=iso9899:1999 -c /usr/src/sys/net/iflib.c -o iflib.o; ctfconvert -L VERSION -g iflib.o;'
.CURDIR='/usr/src/sys/modules/iflib'
.MAKE='make'
.OBJDIR='/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/iflib'
.TARGETS='all'
DESTDIR=''
LD_LIBRARY_PATH=''
MACHINE='powerpc'
MACHINE_ARCH='powerpc'
MAKEOBJDIRPREFIX='/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG/modules'
MAKESYSPATH='/usr/src/share/mk'
MAKE_VERSION='20200606'
PATH='/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/usr/sbin:/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/usr/bin:/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/legacy/usr/sbin:/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/legacy/usr/bin:/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/legacy/bin:/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/tmp/legacy/usr/libexec::/sbin:/bin:/usr/sbin:/usr/bin'
SRCTOP='/usr/src'
OBJTOP='/usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG/modules/usr/src'
.MAKE.MAKEFILES='/usr/src/share/mk/sys.mk /usr/src/share/mk/local.sys.env.mk /usr/src/share/mk/src.sys.env.mk /root/src.configs/src.conf.powerpc-xtoolchain-gcc.amd64-host /usr/src/share/mk/bsd.mkopt.mk /usr/src/share/mk/src.sys.obj.mk /usr/src/share/mk/auto.obj.mk /usr/src/share/mk/bsd.suffixes.mk /root/src.configs/make.conf /usr/src/share/mk/local.sys.mk /usr/src/share/mk/src.sys.mk /dev/null /usr/src/sys/modules/iflib/Makefile /usr/src/share/mk/bsd.kmod.mk /usr/src/share/mk/bsd.sysdir.mk /usr/src/sys/conf/kmod.mk /usr/src/sys/conf/kmod.opts.mk /usr/src/share/mk/bsd.init.mk /usr/src/share/mk/bsd.opts.mk /usr/src/share/mk/bsd.cpu.mk /usr/src/share/mk/local.init.mk /usr/src/share/mk/src.init.mk /usr/src/sys/modules/iflib/../Makefile.inc /usr/src/share/mk/bsd.own.mk /usr/src/share/mk/bsd.compiler.mk /usr/src/share/mk/bsd.linker.mk /usr/src/sys/conf/kern.opts.mk /usr/src/sys/conf/config.mk /usr/src/share/mk/bsd.links.mk /usr/src/share/mk/bsd.dep.mk /usr/src/share/mk/bsd.clang-analyze.mk /usr/src/share/mk/bsd.obj.mk /usr/src/share/mk/bsd.subdir.mk /usr/src/sys/conf/kern.mk'
.PATH='. /usr/src/sys/modules/iflib /usr/src/sys/net /usr/obj/powerpcvtsc_xtoolchain-gcc/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG'
1 error


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)