https://bugzilla.redhat.com/show_bug.cgi?id=1823134



--- Comment #5 from Artur Iwicki <fed...@svgames.pl> ---
After some investigation: yep, that's the case. Look at line 18504 and beyond
in the configure file (the pre-processed one, not the autoconf one). Inside
you'll find this little thing:

># Include CFLAGS / CPPFLAGS in COB_CFLAGS without optimization/debug options.
>if test "x$CFLAGS" != "x"; then
>       cob_temp_flags="$CFLAGS"
>else
>       cob_temp_flags=""
>fi
>if test "x$CPPFLAGS" != "x"; then
>       if test "x$cob_temp_flags" != "x"; then
>               cob_temp_flags="$CPPFLAGS $cob_temp_flags"
>       else
>               cob_temp_flags="$CPPFLAGS"
>       fi
>fi
>if test "x$cob_temp_flags" != "x"; then
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/-g3//' -e 's/-g//' 
> -e 's/ $//' -e 's/^ //'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/[+-]O[0-9s]//' -e 
> 's/ $//' -e 's/^ //'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/-O//' -e 's/ $//' -e 
> 's/^ //'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 
> 's/-fmessage-length=0//'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 
> 's/-D_FORTIFY_SOURCE=.//'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/-fstack-protector//'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/-funwind-tables//'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 
> 's/-fasynchronous-unwind-tables//'`
>       cob_temp_flags=`echo "$cob_temp_flags" | sed -e 's/  */ /g' -e 's/ $//' 
> -e 's/^ //'`
>fi

The configure script is trying to create COB_FLAGS, based on CFLAGS and remove
some unwated options, but because the regexes are not specified to match on a
word boundary, it ends up mangling the options and producing stuff that the
compiler rejects.


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