starting phase `set-SOURCE-DATE-EPOCH'
phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds
starting phase `set-paths'
environment variable `PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/bin:/gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/bin:/gnu/store/g2ajyl8xk9aarxrgjbng2hkj3qm2v0z2-tar-1.34/bin:/gnu/store/iixwcv3k49ks1rf34pjgfzmzyhhgwng3-gzip-1.10/bin:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/bin:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/bin:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin:/gnu/store/ahmmvw21p11ik80lg1f953y7fd8bqkjm-diffutils-3.8/bin:/gnu/store/z39hnrwds1dgcbpfgj8dnv2cngjb2xbl-patch-2.7.6/bin:/gnu/store/39rsx3nl4c31952jybbjb8d6idr5hx7r-findutils-4.8.0/bin:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/bin:/gnu/store/wxgv6i8g0p24q5gcyzd0yr07s8kn9680-sed-4.8/bin:/gnu/store/xjwp2hsd9256icjjybfrmznppjicywf6-grep-3.6/bin:/gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/bin:/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin:/gnu/store/s2pg5k98fl2g2szg9dykxyd9zl3xihv9-ld-wrapper-0/bin:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/bin:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/bin:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/bin:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/sbin'
environment variable `CROSS_LIBRARY_PATH' set to `/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/lib'
environment variable `CROSS_C_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/include'
environment variable `CROSS_CPLUS_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include/c++:/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/include'
environment variable `CROSS_OBJC_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/include'
environment variable `CROSS_OBJCPLUS_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/include'
environment variable `CROSS_C_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/include'
environment variable `CROSS_LIBRARY_PATH' set to `/gnu/store/qf0j5g9rs2ygj8zm3667xs8sx3sv6mr2-mingw-w64-i686-10.0.0/lib'
environment variable `BASH_LOADABLES_PATH' unset
environment variable `C_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/include:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/include:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/include:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/include:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/include:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/include:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/include:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/include:/gnu/store/6mjww4iz4xdan74d5bbjfh7il8rngfkk-linux-libre-headers-5.10.35/include'
environment variable `CPLUS_INCLUDE_PATH' set to `/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include/c++:/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/include:/gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/include:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/include:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/include:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/include:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/include:/gnu/store/55cbpsi18mahg131nmiya6km5b4mscfa-make-4.3/include:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/include:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include/c++:/gnu/store/069aq2v993kpc41yabp5b6vm4wb9jkhg-gcc-10.3.0/include:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/include:/gnu/store/6mjww4iz4xdan74d5bbjfh7il8rngfkk-linux-libre-headers-5.10.35/include'
environment variable `LIBRARY_PATH' set to `/gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/lib:/gnu/store/s3hl12jxz9ybs7nsy7kq7ybzz7qnzmsg-bzip2-1.0.8/lib:/gnu/store/c8isj4jq6knv0icfgr43di6q3nvdzkx7-xz-5.2.5/lib:/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/lib:/gnu/store/690qz3fg334dpwn3pn6k59n4wc943p2b-gawk-5.1.0/lib:/gnu/store/rc781v4k0drhaqn90xfwwpspki5x0bvf-binutils-2.37/lib:/gnu/store/5h2w4qi9hk1qzzgi1w83220ydslinr4s-glibc-2.33/lib:/gnu/store/4jdghmc65q7i7ib89zmvq66l0ghf7jc4-glibc-2.33-static/lib:/gnu/store/fnr1z6xsan0437r0yg48d0y8k32kqxby-glibc-utf8-locales-2.33/lib'
environment variable `GUIX_LOCPATH' set to `/gnu/store/fnr1z6xsan0437r0yg48d0y8k32kqxby-glibc-utf8-locales-2.33/lib/locale'
phase `set-paths' succeeded after 0.0 seconds
starting phase `install-locale'
using 'en_US.utf8' locale for category "LC_ALL"
phase `install-locale' succeeded after 0.0 seconds
starting phase `unpack'
libev-4.33/
libev-4.33/Makefile.am
libev-4.33/configure
libev-4.33/libev.m4
libev-4.33/configure.ac
libev-4.33/aclocal.m4
libev-4.33/ev.h
libev-4.33/ev++.h
libev-4.33/event.h
libev-4.33/Makefile.in
libev-4.33/config.h.in
libev-4.33/README
libev-4.33/TODO
libev-4.33/compile
libev-4.33/config.guess
libev-4.33/config.sub
libev-4.33/depcomp
libev-4.33/install-sh
libev-4.33/ltmain.sh
libev-4.33/missing
libev-4.33/mkinstalldirs
libev-4.33/ev.c
libev-4.33/event.c
libev-4.33/LICENSE
libev-4.33/Changes
libev-4.33/autogen.sh
libev-4.33/ev_vars.h
libev-4.33/ev_wrap.h
libev-4.33/ev_epoll.c
libev-4.33/ev_select.c
libev-4.33/ev_poll.c
libev-4.33/ev_kqueue.c
libev-4.33/ev_port.c
libev-4.33/ev_linuxaio.c
libev-4.33/ev_iouring.c
libev-4.33/ev_win32.c
libev-4.33/ev.3
libev-4.33/ev.pod
libev-4.33/Symbols.ev
libev-4.33/Symbols.event
phase `unpack' succeeded after 0.0 seconds
starting phase `bootstrap'
GNU build system bootstrapping not needed
phase `bootstrap' succeeded after 0.0 seconds
starting phase `patch-usr-bin-file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
patch-/usr/bin/file: ./configure: changing `/usr/bin/file' to `/gnu/store/4ic6244i3ca4b4rxc2wnrgllsidyishv-file-5.39/bin/file'
phase `patch-usr-bin-file' succeeded after 0.1 seconds
starting phase `patch-source-shebangs'
patch-shebang: ./autogen.sh: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./compile: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./config.guess: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./config.sub: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./configure: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./depcomp: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./install-sh: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./ltmain.sh: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./missing: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
patch-shebang: ./mkinstalldirs: changing `/bin/sh' to `/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/sh'
phase `patch-source-shebangs' succeeded after 0.0 seconds
starting phase `configure'
source directory: "/tmp/guix-build-libev-4.33.drv-0/libev-4.33" (relative from build: ".")
build directory: "/tmp/guix-build-libev-4.33.drv-0/libev-4.33"
configure flags: ("CC_FOR_BUILD=gcc" "CONFIG_SHELL=/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash" "SHELL=/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash" "--prefix=/gnu/store/g1cfhyggy3xiv21l6b9hzb9rdw5g90zi-libev-4.33" "--enable-fast-install" "--build=x86_64-unknown-linux-gnu" "--host=i686-w64-mingw32" "--disable-static")
checking for a BSD-compatible install... /gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin/install -c
checking whether build environment is sane... yes
checking for i686-w64-mingw32-strip... i686-w64-mingw32-strip
checking for a thread-safe mkdir -p... /gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... no
checking whether make supports nested variables... yes
checking whether to enable maintainer-specific portions of Makefiles... no
checking for i686-w64-mingw32-gcc... i686-w64-mingw32-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.exe
checking for suffix of executables... .exe
checking whether we are cross compiling... yes
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether i686-w64-mingw32-gcc accepts -g... yes
checking for i686-w64-mingw32-gcc option to accept ISO C89... none needed
checking whether i686-w64-mingw32-gcc understands -c and -o together... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of i686-w64-mingw32-gcc... gcc3
checking build system type... x86_64-unknown-linux-gnu
checking host system type... i686-w64-mingw32
checking how to print strings... printf
checking for a sed that does not truncate output... /gnu/store/wxgv6i8g0p24q5gcyzd0yr07s8kn9680-sed-4.8/bin/sed
checking for grep that handles long lines and -e... /gnu/store/xjwp2hsd9256icjjybfrmznppjicywf6-grep-3.6/bin/grep
checking for egrep... /gnu/store/xjwp2hsd9256icjjybfrmznppjicywf6-grep-3.6/bin/grep -E
checking for fgrep... /gnu/store/xjwp2hsd9256icjjybfrmznppjicywf6-grep-3.6/bin/grep -F
checking for ld used by i686-w64-mingw32-gcc... /gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/libexec/gcc/i686-w64-mingw32/ld
checking if the linker (/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/libexec/gcc/i686-w64-mingw32/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/bin/i686-w64-mingw32-nm -B
checking the name lister (/gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/bin/i686-w64-mingw32-nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-unknown-linux-gnu file names to i686-w64-mingw32 format... func_convert_file_nix_to_w32
checking how to convert x86_64-unknown-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/libexec/gcc/i686-w64-mingw32/ld option to reload object files... -r
checking for i686-w64-mingw32-objdump... i686-w64-mingw32-objdump
checking how to recognize dependent libraries... file_magic ^x86 archive import|^x86 DLL
checking for i686-w64-mingw32-dlltool... i686-w64-mingw32-dlltool
checking how to associate runtime and link libraries... func_cygming_dll_for_implib
checking for i686-w64-mingw32-ar... i686-w64-mingw32-ar
checking for archiver @FILE support... @
checking for i686-w64-mingw32-strip... (cached) i686-w64-mingw32-strip
checking for i686-w64-mingw32-ranlib... i686-w64-mingw32-ranlib
checking command to parse /gnu/store/4c2ms160d1fgxz4inrz8mk631x8bkrwd-binutils-cross-i686-w64-mingw32-2.37/bin/i686-w64-mingw32-nm -B output from i686-w64-mingw32-gcc object... ok
checking for sysroot... no
checking for a working dd... /gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin/dd
checking how to truncate binary pipes... /gnu/store/d251rfgc9nm2clzffzhgiipdvfvzkvwi-coreutils-8.32/bin/dd bs=4096 count=1
checking for i686-w64-mingw32-mt... no
checking for mt... no
checking if : is a manifest tool... no
checking how to run the C preprocessor... i686-w64-mingw32-gcc -E
checking for ANSI C header files... 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 for dlfcn.h... no
checking for objdir... .libs
checking if i686-w64-mingw32-gcc supports -fno-rtti -fno-exceptions... no
checking for i686-w64-mingw32-gcc option to produce PIC... -DDLL_EXPORT -DPIC
checking if i686-w64-mingw32-gcc PIC flag -DDLL_EXPORT -DPIC works... yes
checking if i686-w64-mingw32-gcc static flag -static works... yes
checking if i686-w64-mingw32-gcc supports -c -o file.o... yes
checking if i686-w64-mingw32-gcc supports -c -o file.o... (cached) yes
checking whether the i686-w64-mingw32-gcc linker (/gnu/store/56kzihjhzga6378wsipzry01xrbg3s8v-gcc-cross-i686-w64-mingw32-10.3.0/libexec/gcc/i686-w64-mingw32/ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... yes
checking dynamic linker characteristics... Win32 ld.exe
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking sys/inotify.h usability... no
checking sys/inotify.h presence... no
checking for sys/inotify.h... no
checking sys/epoll.h usability... no
checking sys/epoll.h presence... no
checking for sys/epoll.h... no
checking sys/event.h usability... no
checking sys/event.h presence... no
checking for sys/event.h... no
checking port.h usability... no
checking port.h presence... no
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checking poll.h usability... no
checking poll.h presence... no
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checking sys/timerfd.h usability... no
checking sys/timerfd.h presence... no
checking for sys/timerfd.h... no
checking sys/select.h usability... no
checking sys/select.h presence... no
checking for sys/select.h... no
checking sys/eventfd.h usability... no
checking sys/eventfd.h presence... no
checking for sys/eventfd.h... no
checking sys/signalfd.h usability... no
checking sys/signalfd.h presence... no
checking for sys/signalfd.h... no
checking linux/aio_abi.h usability... no
checking linux/aio_abi.h presence... no
checking for linux/aio_abi.h... no
checking linux/fs.h usability... no
checking linux/fs.h presence... no
checking for linux/fs.h... no
checking for inotify_init... no
checking for epoll_ctl... no
checking for kqueue... no
checking for port_create... no
checking for poll... no
checking for select... no
checking for eventfd... no
checking for signalfd... no
checking for clock_gettime... no
checking for clock_gettime syscall... no
checking for clock_gettime in -lrt... no
checking for clock_gettime... no
checking for nanosleep... no
checking for nanosleep in -lrt... no
checking for nanosleep... no
checking for __kernel_rwf_t... no
checking for library containing floor... none required
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
phase `configure' succeeded after 4.7 seconds
starting phase `patch-generated-file-shebangs'
phase `patch-generated-file-shebangs' succeeded after 0.0 seconds
starting phase `build'
make  all-am
make[1]: Entering directory '/tmp/guix-build-libev-4.33.drv-0/libev-4.33'
/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash ./libtool  --tag=CC   --mode=compile i686-w64-mingw32-gcc -DHAVE_CONFIG_H -I.     -g -O3 -MT ev.lo -MD -MP -MF .deps/ev.Tpo -c -o ev.lo ev.c
/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash ./libtool  --tag=CC   --mode=compile i686-w64-mingw32-gcc -DHAVE_CONFIG_H -I.     -g -O3 -MT event.lo -MD -MP -MF .deps/event.Tpo -c -o event.lo event.c
libtool: compile:  i686-w64-mingw32-gcc -DHAVE_CONFIG_H -I. -g -O3 -MT event.lo -MD -MP -MF .deps/event.Tpo -c event.c  -DDLL_EXPORT -DPIC -o .libs/event.o
libtool: compile:  i686-w64-mingw32-gcc -DHAVE_CONFIG_H -I. -g -O3 -MT ev.lo -MD -MP -MF .deps/ev.Tpo -c ev.c  -DDLL_EXPORT -DPIC -o .libs/ev.o
mv -f .deps/event.Tpo .deps/event.Plo
ev.c:2143:31: warning: ‘ev_default_loop_ptr’ initialized and declared ‘extern’
 2143 |   EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
      |                               ^~~~~~~~~~~~~~~~~~~
mv -f .deps/ev.Tpo .deps/ev.Plo
/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash ./libtool  --tag=CC   --mode=link i686-w64-mingw32-gcc  -g -O3 -version-info 4:0:0  -o libev.la -rpath /gnu/store/g1cfhyggy3xiv21l6b9hzb9rdw5g90zi-libev-4.33/lib ev.lo event.lo  
libtool:   error: can't build i686-w64-mingw32 shared library unless -no-undefined is specified
make[1]: *** [Makefile:454: libev.la] Error 1
make[1]: Leaving directory '/tmp/guix-build-libev-4.33.drv-0/libev-4.33'
make: *** [Makefile:365: all] Error 2
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "make" arguments: ("-j" "16") exit-status: 2 term-signal: #f stop-signal: #f> 
phase `build' failed after 1.8 seconds
command "make" "-j" "16" failed with status 2