https://bugs.gentoo.org/420239

https://sourceforge.net/tracker/?func=detail&aid=3533795&group_id=303195&atid=1278160

--- configure
+++ configure
@@ -33,7 +33,11 @@ case "$host_os" in
   linux*)
     case "$host_cpu" in
       x86_64)
-        objfmt='ELF64'
+        if echo __ILP32__ | $CC $CFLAGS -E - | grep __ILP32__ > /dev/null; then
+          objfmt='ELF64'
+        else
+          objfmt='ELFX32'
+        fi
         ;;
       *)
         objfmt='ELF'
@@ -94,6 +98,7 @@ case "$objfmt" in
   a.out)      NAFLAGS='-faout -DAOUT';;
   BSD-a.out)  NAFLAGS='-faoutb -DAOUT';;
   ELF)        NAFLAGS='-felf -DELF';;
+  ELFX32)     NAFLAGS='-felfx32 -DELF -D__x86_64__';;
   ELF64)      NAFLAGS='-felf64 -DELF -D__x86_64__';;
   RDF)        NAFLAGS='-frdf -DRDF';;
   Mach-O)     NAFLAGS='-fmacho -DMACHO';;
--- simd/nasm_lt.sh
+++ simd/nasm_lt.sh
@@ -11,7 +11,7 @@ while [ $# -gt 0 ]; do
                 pic=yes
             fi
             ;;
-        -f|-fbin|-faout|-faoutb|-fcoff|-felf|-felf64|-fas86| \
+        -f|-fbin|-faout|-faoutb|-fcoff|-felf|-felf64|-felfx32|-fas86| \
         -fobj|-fwin32|-fwin64|-frdf|-fieee|-fmacho|-fmacho64)
             # it's a file format specifier for nasm.
             command="$command $1"