These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] www-servers/spawn-fcgi-1.6.4-r1::gentoo  USE="ipv6" 0 KiB

Total: 1 package (1 reinstall), Size of downloads: 0 KiB


>>> Verifying ebuild manifests

>>> Emerging (1 of 1) www-servers/spawn-fcgi-1.6.4-r1::gentoo
 * spawn-fcgi-1.6.4.tar.xz BLAKE2B SHA512 size ;-) ...                                                                                                       [ ok ]
>>> Unpacking source...
>>> Unpacking spawn-fcgi-1.6.4.tar.xz to /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work
>>> Source unpacked in /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work
>>> Preparing source in /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4 ...
./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --disable-dependency-tracking --disable-silent-rules --docdir=/usr/share/doc/spawn-fcgi-1.6.4-r1 --htmldir=/usr/share/doc/spawn-fcgi-1.6.4-r1/html --libdir=/usr/lib64 --enable-ipv6
checking for a BSD-compatible install... /usr/lib/portage/python3.6/ebuild-helpers/xattr/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for x86_64-pc-linux-gnu-gcc... x86_64-pc-linux-gnu-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether x86_64-pc-linux-gnu-gcc accepts -g... yes
checking for x86_64-pc-linux-gnu-gcc option to accept ISO C89... none needed
checking whether x86_64-pc-linux-gnu-gcc understands -c and -o together... yes
checking for style of include used by make... GNU
checking dependency style of x86_64-pc-linux-gnu-gcc... none
checking whether make sets $(MAKE)... (cached) yes
checking how to run the C preprocessor... x86_64-pc-linux-gnu-gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/wait.h that is POSIX.1 compatible... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking arpa/inet.h usability... yes
checking arpa/inet.h presence... yes
checking for arpa/inet.h... yes
checking errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking getopt.h usability... yes
checking getopt.h presence... yes
checking for getopt.h... yes
checking grp.h usability... yes
checking grp.h presence... yes
checking for grp.h... yes
checking netdb.h usability... yes
checking netdb.h presence... yes
checking for netdb.h... yes
checking netinet/in.h usability... yes
checking netinet/in.h presence... yes
checking for netinet/in.h... yes
checking netinet/tcp.h usability... yes
checking netinet/tcp.h presence... yes
checking for netinet/tcp.h... yes
checking pwd.h usability... yes
checking pwd.h presence... yes
checking for pwd.h... yes
checking stdio.h usability... yes
checking stdio.h presence... yes
checking for stdio.h... yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
checking for sys/ioctl.h... yes
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking for sys/stat.h... (cached) yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking for sys/types.h... (cached) yes
checking sys/un.h usability... yes
checking sys/un.h presence... yes
checking for sys/un.h... yes
checking for sys/wait.h... (cached) yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... yes
checking for uid_t in sys/types.h... yes
checking for pid_t... yes
checking whether time.h and sys/time.h may both be included... yes
checking for socklen_t... yes
checking for library containing socket... none required
checking for library containing inet_addr... none required
checking for unistd.h... (cached) yes
checking for working chown... yes
checking vfork.h usability... no
checking vfork.h presence... no
checking for vfork.h... no
checking for fork... yes
checking for vfork... yes
checking for working fork... yes
checking for working vfork... (cached) yes
checking for stdlib.h... (cached) yes
checking for GNU libc compatible malloc... yes
checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking for sys/socket.h... (cached) yes
checking types of arguments for select... int,fd_set *,struct timeval *
checking whether lstat correctly handles trailing slash... yes
checking whether stat accepts an empty string... no
checking for dup2... yes
checking for memset... yes
checking for putenv... yes
checking for select... yes
checking for socket... yes
checking for strerror... yes
checking for strtol... yes
checking for issetugid... no
checking for inet_pton... yes
checking for IPv6 support... no
checking if x86_64-pc-linux-gnu-gcc supports -Wall -W -Wshadow -pedantic... yes
checking if x86_64-pc-linux-gnu-gcc supports -std=gnu99... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating doc/Makefile
config.status: creating config.h
config.status: executing depfiles commands
>>> Source configured.
>>> Compiling source in /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4 ...
make -j2
make  all-recursive
make[1]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
Making all in src
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..     -O2 -pipe -Wall -W -Wshadow -pedantic -std=gnu99 -c -o spawn-fcgi.o spawn-fcgi.c
x86_64-pc-linux-gnu-gcc  -O2 -pipe -Wall -W -Wshadow -pedantic -std=gnu99  -Wl,-O1 -Wl,--as-needed -o spawn-fcgi spawn-fcgi.o
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
Making all in doc
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
make[1]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
>>> Source compiled.
>>> Test phase [not enabled]: www-servers/spawn-fcgi-1.6.4-r1

>>> Install spawn-fcgi-1.6.4-r1 into /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image category www-servers
make -j2 DESTDIR=/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image install
Making install in src
make[1]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
make[2]: Nothing to be done for 'install-data-am'.
 /bin/mkdir -p '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image/usr/bin'
  /usr/lib/portage/python3.6/ebuild-helpers/xattr/install -c spawn-fcgi '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image/usr/bin'
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
make[1]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/src'
Making install in doc
make[1]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[2]: Nothing to be done for 'install-exec-am'.
make[2]: Nothing to be done for 'install-data-am'.
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[1]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4/doc'
make[1]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
make[2]: Entering directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
make[2]: Nothing to be done for 'install-exec-am'.
 /bin/mkdir -p '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image/usr/share/man/man1'
 /usr/lib/portage/python3.6/ebuild-helpers/xattr/install -c -m 644 spawn-fcgi.1 '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image/usr/share/man/man1'
make[2]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
make[1]: Leaving directory '/var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/work/spawn-fcgi-1.6.4'
>>> Completed installing spawn-fcgi-1.6.4-r1 into /var/tmp/portage/www-servers/spawn-fcgi-1.6.4-r1/image

 * Final size of build directory: 676 KiB
 * Final size of installed tree:  116 KiB

strip: x86_64-pc-linux-gnu-strip --strip-unneeded -R .comment -R .GCC.command.line -R .note.gnu.gold-version
   /usr/bin/spawn-fcgi

>>> Installing (1 of 1) www-servers/spawn-fcgi-1.6.4-r1::gentoo
 * checking 10 files for package collisions
>>> Merging www-servers/spawn-fcgi-1.6.4-r1 to /
--- /usr/
--- /usr/bin/
>>> /usr/bin/spawn-fcgi
--- /usr/share/
--- /usr/share/doc/
--- /usr/share/doc/spawn-fcgi-1.6.4-r1/
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/AUTHORS
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/README.bz2
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/NEWS.bz2
--- /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-generic.bz2
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-rails.bz2
>>> /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-php.bz2
--- /usr/share/man/
--- /usr/share/man/man1/
>>> /usr/share/man/man1/spawn-fcgi.1.bz2
--- /etc/
--- /etc/conf.d/
>>> /etc/conf.d/spawn-fcgi
--- /etc/init.d/
>>> /etc/init.d/spawn-fcgi
>>> Safely unmerging already-installed instance...
No package files given... Grabbing a set.
--- replaced obj /usr/share/man/man1/spawn-fcgi.1.bz2
--- replaced dir /usr/share/man/man1
--- replaced dir /usr/share/man
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-rails.bz2
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-php.bz2
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/examples/run-generic.bz2
--- replaced dir /usr/share/doc/spawn-fcgi-1.6.4-r1/examples
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/README.bz2
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/NEWS.bz2
--- replaced obj /usr/share/doc/spawn-fcgi-1.6.4-r1/AUTHORS
--- replaced dir /usr/share/doc/spawn-fcgi-1.6.4-r1
--- replaced dir /usr/share/doc
--- replaced dir /usr/share
--- replaced obj /usr/bin/spawn-fcgi
--- replaced dir /usr/bin
--- replaced dir /usr
--- replaced obj /etc/init.d/spawn-fcgi
--- replaced dir /etc/init.d
--- replaced obj /etc/conf.d/spawn-fcgi
--- replaced dir /etc/conf.d
--- replaced dir /etc
>>> Original instance of package unmerged safely.
>>> www-servers/spawn-fcgi-1.6.4-r1 merged.
>>> Auto-cleaning packages...

>>> No outdated packages were found on your system.

 * GNU info directory index is up-to-date.