libconfig windows static log

unpacking sources
unpacking source archive /nix/store/9hkss1sjxmxi6206ldjn96kkbbhd5xg1-libconfig-1.7.2.tar.gz
source root is libconfig-1.7.2
setting SOURCE_DATE_EPOCH to timestamp 1515214337 of file libconfig-1.7.2/contrib/chained/libconfig_chained.h
patching sources
configuring
fixing libtool script ./aux-build/ltmain.sh
configure flags: --disable-dependency-tracking --prefix=/nix/store/zg5h6jcl1lncp82jzr52qs0rlwng1gbj-libconfig-static-x86_64-w64-mingw32-1.7.2 --disable-examples --disable-shared --enable-static --disable-shared --build=x86_64-unknown-linux-gnu --host=x86_64-w64-mingw32
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-w64-mingw32
checking target system type... x86_64-w64-mingw32
checking for a BSD-compatible install... /nix/store/dyikz835agazxvxm9fj7xqlsz0k34iwj-coreutils-8.32/bin/install -c
checking whether build environment is sane... yes
checking for x86_64-w64-mingw32-strip... x86_64-w64-mingw32-strip
checking for a thread-safe mkdir -p... /nix/store/dyikz835agazxvxm9fj7xqlsz0k34iwj-coreutils-8.32/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
configure: libconfig - made with pride in Colorado
checking for style of include used by make... GNU
checking for x86_64-w64-mingw32-gcc... x86_64-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 x86_64-w64-mingw32-gcc accepts -g... yes
checking for x86_64-w64-mingw32-gcc option to accept ISO C89... none needed
checking whether x86_64-w64-mingw32-gcc understands -c and -o together... yes
checking dependency style of x86_64-w64-mingw32-gcc... none
checking how to run the C preprocessor... x86_64-w64-mingw32-gcc -E
checking for grep that handles long lines and -e... /nix/store/fxy5ficr8paan2yxrh45d9j17ryy2z2y-gnugrep-3.6/bin/grep
checking for egrep... /nix/store/fxy5ficr8paan2yxrh45d9j17ryy2z2y-gnugrep-3.6/bin/grep -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 minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking how to print strings... printf
checking for a sed that does not truncate output... /nix/store/9fbkl74hnskvmlkbx2cyy88q04nx12vp-gnused-4.8/bin/sed
checking for fgrep... /nix/store/fxy5ficr8paan2yxrh45d9j17ryy2z2y-gnugrep-3.6/bin/grep -F
checking for ld used by x86_64-w64-mingw32-gcc... x86_64-w64-mingw32-ld
checking if the linker (x86_64-w64-mingw32-ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... x86_64-w64-mingw32-nm
checking the name lister (x86_64-w64-mingw32-nm) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 32768
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-unknown-linux-gnu file names to x86_64-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 x86_64-w64-mingw32-ld option to reload object files... -r
checking for x86_64-w64-mingw32-objdump... x86_64-w64-mingw32-objdump
checking how to recognize dependent libraries... file_magic ^x86 archive import|^x86 DLL
checking for x86_64-w64-mingw32-dlltool... x86_64-w64-mingw32-dlltool
checking how to associate runtime and link libraries... func_cygming_dll_for_implib
checking for x86_64-w64-mingw32-ar... x86_64-w64-mingw32-ar
checking for archiver @FILE support... @
checking for x86_64-w64-mingw32-strip... (cached) x86_64-w64-mingw32-strip
checking for x86_64-w64-mingw32-ranlib... x86_64-w64-mingw32-ranlib
checking command to parse x86_64-w64-mingw32-nm output from x86_64-w64-mingw32-gcc object... ok
checking for sysroot... no
checking for x86_64-w64-mingw32-mt... no
checking for mt... no
checking if : is a manifest tool... no
checking for dlfcn.h... no
checking for objdir... .libs
checking if x86_64-w64-mingw32-gcc supports -fno-rtti -fno-exceptions... no
checking for x86_64-w64-mingw32-gcc option to produce PIC... -DDLL_EXPORT -DPIC
checking if x86_64-w64-mingw32-gcc PIC flag -DDLL_EXPORT -DPIC works... yes
checking if x86_64-w64-mingw32-gcc static flag -static works... yes
checking if x86_64-w64-mingw32-gcc supports -c -o file.o... yes
checking if x86_64-w64-mingw32-gcc supports -c -o file.o... (cached) yes
checking whether the x86_64-w64-mingw32-gcc linker (x86_64-w64-mingw32-ld) supports shared libraries... 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... no
checking whether to build static libraries... yes
checking for x86_64-w64-mingw32-gcc... (cached) x86_64-w64-mingw32-gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether x86_64-w64-mingw32-gcc accepts -g... (cached) yes
checking for x86_64-w64-mingw32-gcc option to accept ISO C89... (cached) none needed
checking whether x86_64-w64-mingw32-gcc understands -c and -o together... (cached) yes
checking dependency style of x86_64-w64-mingw32-gcc... (cached) none
checking whether we are using the GNU C++ compiler... yes
checking whether x86_64-w64-mingw32-g++ accepts -g... yes
checking dependency style of x86_64-w64-mingw32-g++... none
checking how to run the C++ preprocessor... x86_64-w64-mingw32-g++ -E
checking for ld used by x86_64-w64-mingw32-g++... x86_64-w64-mingw32-ld
checking if the linker (x86_64-w64-mingw32-ld) is GNU ld... yes
checking whether the x86_64-w64-mingw32-g++ linker (x86_64-w64-mingw32-ld) supports shared libraries... yes
checking for x86_64-w64-mingw32-g++ option to produce PIC... -DDLL_EXPORT -DPIC
checking if x86_64-w64-mingw32-g++ PIC flag -DDLL_EXPORT -DPIC works... yes
checking if x86_64-w64-mingw32-g++ static flag -static works... yes
checking if x86_64-w64-mingw32-g++ supports -c -o file.o... yes
checking if x86_64-w64-mingw32-g++ supports -c -o file.o... (cached) yes
checking whether the x86_64-w64-mingw32-g++ linker (x86_64-w64-mingw32-ld) supports shared libraries... yes
checking dynamic linker characteristics... Win32 ld.exe
checking how to hardcode library paths into programs... immediate
checking for x86_64-w64-mingw32-as... x86_64-w64-mingw32-as
checking for x86_64-w64-mingw32-dlltool... (cached) x86_64-w64-mingw32-dlltool
checking for x86_64-w64-mingw32-objdump... (cached) x86_64-w64-mingw32-objdump
checking for flex... no
checking for lex... no
*******************************************************************
You do not seem to have flex. While flex is not required to build
libconfig, you may need it to regenerate the lexer if you change
the scanner.l file.
*******************************************************************
checking for bison... no
checking for byacc... no
*******************************************************************
You do not seem to have bison. While bison is not required to build
libconfig, you may need it to regenerate the parser if you change
the grammar.y file.
*******************************************************************
checking for compiler switch to enable full C/C++ warnings... (cannot determine)
checking for ANSI C header files... (cached) yes
checking for unistd.h... (cached) yes
checking for stdint.h... (cached) yes
checking xlocale.h usability... no
checking xlocale.h presence... no
checking for xlocale.h... no
checking for an ANSI C-conforming const... yes
checking for newlocale... no
checking for uselocale... no
checking for freelocale... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating lib/Makefile
config.status: creating lib/libconfig.pc
config.status: creating lib/libconfig++.pc
config.status: creating lib/libconfigConfig.cmake
config.status: creating lib/libconfig++Config.cmake
config.status: creating doc/Makefile
config.status: creating examples/Makefile
config.status: creating examples/c/Makefile
config.status: creating examples/c++/Makefile
config.status: creating tinytest/Makefile
config.status: creating tests/Makefile
config.status: creating libconfig.spec
config.status: creating ac_config.h
config.status: executing depfiles commands
config.status: executing libtool commands
building
build flags: SHELL=/nix/store/68c5b0h2w2ab57sbas1b4m073ik8hlm5-bash-4.4-p23/bin/bash
make  all-recursive
make[1]: Entering directory '/build/libconfig-1.7.2'
Making all in lib
make[2]: Entering directory '/build/libconfig-1.7.2/lib'
make  all-am
make[3]: Entering directory '/build/libconfig-1.7.2/lib'
  CC       libconfig_la-grammar.lo
  CC       libconfig_la-libconfig.lo
libconfig.c: In function '__config_locale_override':
libconfig.c:99:2: warning: #warning "No way to modify calling thread's locale!" [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wcpp-Wcpp8;;]
   99 | #warning "No way to modify calling thread's locale!"
      |  ^~~~~~~
libconfig.c: In function '__config_locale_restore':
libconfig.c:120:2: warning: #warning "No way to modify calling thread's locale!" [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wcpp-Wcpp8;;]
  120 | #warning "No way to modify calling thread's locale!"
      |  ^~~~~~~
libconfig.c: In function 'config_write_file':
libconfig.c:701:10: warning: implicit declaration of function 'fsync' [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wimplicit-function-declaration-Wimplicit-function-declaration8;;]
  701 |       if(fsync(fd) != 0)
      |          ^~~~~
  CC       libconfig_la-scanctx.lo
  CC       libconfig_la-scanner.lo
  CC       libconfig_la-strbuf.lo
  CC       libconfig_la-strvec.lo
  CC       libconfig_la-util.lo
  CC       libconfig_la-wincompat.lo
  CCLD     libconfig.la
x86_64-w64-mingw32-ar: `u' modifier ignored since `D' is the default (see `U')
  CC       libconfig___la-grammar.lo
  CC       libconfig___la-libconfig.lo
libconfig.c: In function '__config_locale_override':
libconfig.c:99:2: warning: #warning "No way to modify calling thread's locale!" [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wcpp-Wcpp8;;]
   99 | #warning "No way to modify calling thread's locale!"
      |  ^~~~~~~
libconfig.c: In function '__config_locale_restore':
libconfig.c:120:2: warning: #warning "No way to modify calling thread's locale!" [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wcpp-Wcpp8;;]
  120 | #warning "No way to modify calling thread's locale!"
      |  ^~~~~~~
libconfig.c: In function 'config_write_file':
libconfig.c:701:10: warning: implicit declaration of function 'fsync' [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wimplicit-function-declaration-Wimplicit-function-declaration8;;]
  701 |       if(fsync(fd) != 0)
      |          ^~~~~
  CC       libconfig___la-scanctx.lo
  CC       libconfig___la-scanner.lo
  CC       libconfig___la-strbuf.lo
  CC       libconfig___la-strvec.lo
  CC       libconfig___la-util.lo
  CC       libconfig___la-wincompat.lo
  CXX      libconfig___la-libconfigcpp.lo
  CXXLD    libconfig++.la
x86_64-w64-mingw32-ar: `u' modifier ignored since `D' is the default (see `U')
make[3]: Leaving directory '/build/libconfig-1.7.2/lib'
make[2]: Leaving directory '/build/libconfig-1.7.2/lib'
Making all in doc
make[2]: Entering directory '/build/libconfig-1.7.2/doc'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/build/libconfig-1.7.2/doc'
Making all in tinytest
make[2]: Entering directory '/build/libconfig-1.7.2/tinytest'
  CC       tinytest.o
tinytest.c:30: warning: "F_OK" redefined
   30 | #define F_OK 4  // Windows doesn't have F_OK
      | 
In file included from tinytest.c:29:
/nix/store/irgar8v4ww9b69znjwlzlpp6z8blyr6q-x86_64-w64-mingw32-stage-final-gcc-debug-10.2.0/x86_64-w64-mingw32/sys-include/io.h:182: note: this is the location of the previous definition
  182 | #define F_OK 0 /* Check for file existence */
      | 
tinytest.c: In function 'tt_output_val':
tinytest.c:330:26: warning: unknown conversion type character 'l' in format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat=-Wformat=8;;]
  330 |       fprintf(stream, "%lld", val->value.int64_val);
      |                          ^
tinytest.c:330:23: warning: too many arguments for format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat-extra-args-Wformat-extra-args8;;]
  330 |       fprintf(stream, "%lld", val->value.int64_val);
      |                       ^~~~~~
tinytest.c:330:26: warning: unknown conversion type character 'l' in format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat=-Wformat=8;;]
  330 |       fprintf(stream, "%lld", val->value.int64_val);
      |                          ^
tinytest.c:330:23: warning: too many arguments for format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat-extra-args-Wformat-extra-args8;;]
  330 |       fprintf(stream, "%lld", val->value.int64_val);
      |                       ^~~~~~
tinytest.c:334:26: warning: unknown conversion type character 'l' in format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat=-Wformat=8;;]
  334 |       fprintf(stream, "%llu", val->value.uint64_val);
      |                          ^
tinytest.c:334:23: warning: too many arguments for format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat-extra-args-Wformat-extra-args8;;]
  334 |       fprintf(stream, "%llu", val->value.uint64_val);
      |                       ^~~~~~
tinytest.c:334:26: warning: unknown conversion type character 'l' in format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat=-Wformat=8;;]
  334 |       fprintf(stream, "%llu", val->value.uint64_val);
      |                          ^
tinytest.c:334:23: warning: too many arguments for format [8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wformat-extra-args-Wformat-extra-args8;;]
  334 |       fprintf(stream, "%llu", val->value.uint64_val);
      |                       ^~~~~~
  AR       libtinytest.a
make[2]: Leaving directory '/build/libconfig-1.7.2/tinytest'
Making all in tests
make[2]: Entering directory '/build/libconfig-1.7.2/tests'
  CC       libconfig_tests-tests.o
  CCLD     libconfig_tests.exe
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `EscapedStrings':
/build/libconfig-1.7.2/tests/tests.c:446: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:447: undefined reference to `__imp_config_set_include_dir'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:449: undefined reference to `__imp_config_read_file'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:457: undefined reference to `__imp_config_lookup_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:485: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `RemoveSetting':
/build/libconfig-1.7.2/tests/tests.c:419: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:420: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:424: undefined reference to `__imp_config_setting_remove'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:428: undefined reference to `__imp_config_lookup'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:435: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt7':
/build/libconfig-1.7.2/tests/tests.c:392: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:393: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:397: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:401: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:405: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt6':
/build/libconfig-1.7.2/tests/tests.c:365: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:366: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:369: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:373: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:377: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt5':
/build/libconfig-1.7.2/tests/tests.c:337: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:338: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:342: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:346: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:350: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt4':
/build/libconfig-1.7.2/tests/tests.c:310: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:311: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:314: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:318: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:322: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt3':
/build/libconfig-1.7.2/tests/tests.c:282: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:283: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:287: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:291: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:295: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt2':
/build/libconfig-1.7.2/tests/tests.c:254: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:255: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:259: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:263: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:267: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `BigInt1':
/build/libconfig-1.7.2/tests/tests.c:227: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:228: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:231: undefined reference to `__imp_config_lookup_int'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:235: undefined reference to `__imp_config_lookup_int64'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:239: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `parse_and_compare':
/build/libconfig-1.7.2/tests/tests.c:53: undefined reference to `__imp_config_write_file'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:58: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:41: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:42: undefined reference to `__imp_config_set_include_dir'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:44: undefined reference to `__imp_config_read_file'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `parse_file_and_compare_error':
/build/libconfig-1.7.2/tests/tests.c:70: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:71: undefined reference to `__imp_config_read_file'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:80: undefined reference to `__imp_config_destroy'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: libconfig_tests-tests.o: in function `parse_string_and_compare_error':
/build/libconfig-1.7.2/tests/tests.c:94: undefined reference to `__imp_config_init'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:95: undefined reference to `__imp_config_read_string'
/nix/store/r10idkl2bgbzzgwv5l3y6gc6pf66bc76-x86_64-w64-mingw32-binutils-2.35.1/bin/x86_64-w64-mingw32-ld: /build/libconfig-1.7.2/tests/tests.c:103: undefined reference to `__imp_config_destroy'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:579: libconfig_tests.exe] Error 1
make[2]: Leaving directory '/build/libconfig-1.7.2/tests'
make[1]: *** [Makefile:444: all-recursive] Error 1
make[1]: Leaving directory '/build/libconfig-1.7.2'
make: *** [Makefile:374: all] Error 2
builder for '/nix/store/3zaw6f97hv4556b5vrkivgfcywzvqdqp-libconfig-static-x86_64-w64-mingw32-1.7.2.drv' failed with exit code 2 

Not sure what "this" is referring to.

• I never got tests to cross-build statically for windows.
• I got a PR merged upstream that added the --disable-tests option (hyperrealm/libconfig#190)
• I made a PR for nixpkgs to disable tests on libconfig (NixOS/nixpkgs#120973) though it never got merged it seems.
• I got libconfig cross-compiling statically for windows. You can see my nix overrides here: https://github.com/Radvendii/MAR1D/blob/master/nix/windows.nix#L23-L30