[Bug target/85669] fail on s-case-cfn-macros: build/gencfn-macros: DEF_INTERNAL_FLT/INT_FN (%smth%) has no associated built-in functions

[dougmencken at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669

--- Comment #19 from Douglas Mencken <dougmencken at gmail dot com> ---
I dunno are such warnings related or not

echo timestamp > s-gtype
ccache /Developer/GCC/7.3p/PowerPC/32bit/bin/g++ -std=gnu++98 -fno-PIE -c   -g
-mdynamic-no-pic -DIN_GCC     -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings  
-DHAVE_CONFIG_H -I. -I. -I../../gcc-8.2.0/gcc -I../../gcc-8.2.0/gcc/.
-I../../gcc-8.2.0/gcc/../include -I../../gcc-8.2.0/gcc/../libcpp/include
-I/Volumes/LibreOffice/TheGCC/_build_8.2/./gmp
-I/Volumes/LibreOffice/TheGCC/gcc-8.2.0/gmp
-I/Volumes/LibreOffice/TheGCC/_build_8.2/./mpfr/src
-I/Volumes/LibreOffice/TheGCC/gcc-8.2.0/mpfr/src
-I/Volumes/LibreOffice/TheGCC/gcc-8.2.0/mpc/src 
-I../../gcc-8.2.0/gcc/../libdecnumber -I../../gcc-8.2.0/gcc/../libdecnumber/dpd
-I../libdecnumber -I../../gcc-8.2.0/gcc/../libbacktrace
-I/Volumes/LibreOffice/TheGCC/_build_8.2/./isl/include
-I/Volumes/LibreOffice/TheGCC/gcc-8.2.0/isl/include  -o explow.o -MT explow.o
-MMD -MP -MF ./.deps/explow.TPo ../../gcc-8.2.0/gcc/explow.c
../../gcc-8.2.0/gcc/explow.c: In function 'rtx_def* round_push(rtx)':
../../gcc-8.2.0/gcc/explow.c:989:248: warning: self-comparison always evaluates
to false [-Wtautological-compare]
   if (!SUPPORTS_STACK_ALIGNMENT
         ~~~~~~~~~~~~~~~~~~~~~~~
         ^
../../gcc-8.2.0/gcc/explow.c: In function 'void emit_stack_restore(save_level,
rtx)':
../../gcc-8.2.0/gcc/explow.c:1104:247: warning: self-comparison always
evaluates to false [-Wtautological-compare]
   if (SUPPORTS_STACK_ALIGNMENT)
        ~~~~~~~~~~~~~~~~~~~~~~~~
        ^
rm -rf libbackend.a