make: Warning: File 'conftest.mk' has modification time 0.29 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing c_version with CC='x86_64-w64-mingw32-gcc':

testing c_compile:

testing c_link:
make: Warning: File 'conftest.c' has modification time 0.13 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing c_link with CFLAGS='-O2 -fno-strict-aliasing':

testing c_link with CFLAGS_FLOAT='-ffloat-store':

testing xc_version with XCC='gcc':

testing xc_compile:

testing xc_link:
make: Warning: File 'conftest.c' has modification time 0.073 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing xc_run:
make: Warning: File 'conftest.c' has modification time 0.15 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing f_compile:

testing f_link:
make: Warning: File 'conftest.f' has modification time 0.071 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing f_link with FFLAGS='-O2':
make: Warning: File 'conftest.f' has modification time 0.05 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing f_link with FFLAGS_FLOAT='-ffloat-store':
make: Warning: File 'conftest.f' has modification time 0.12 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing f_link with FFLAGS_THREAD='-frecursive':
make: Warning: File 'conftest.f' has modification time 0.13 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing xar_version with XAR='x86_64-w64-mingw32-ar':

testing c_and_f_link with FLAGS_BITS='-m64':

testing no_cygwin with FLAGS_WINDOWS='':

testing c_and_f_link with FLAGS_PIPE='-pipe':

testing dlltool:

testing c_compile with FLAGS_PIC='-fPIC':

testing shared_link with LD_SHARED='-shared':
make: Warning: File 'conftest.c' has modification time 0.21 s in the future
make: warning:  Clock skew detected.  Your build may be incomplete.

testing shared_link with LDFLAGS_LIBGCC='-static-libgcc':

testing ld_export with LD_EXPORT='-Wl,--version-script':

testing strip with STRIP_FLAGS='-s':

testing ld_static with LD_STATIC='-Wl,-Bstatic':

testing f_compile_c_link with LIBS_FORTRAN='':
conftest.o: In function `f_':
conftest.f:(.text+0x35): undefined reference to `_gfortran_concat_string'
conftest.f:(.text+0x4a): undefined reference to `_gfortran_pow_i4_i4'
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN='-lgfortran':
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortran
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN='-lgfortanbegin -lgfortran':
make: Warning: File 'conftest.f' has modification time 0.15 s in the future
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortanbegin
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortran
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN='-lgfortran -lquadmath':
make: Warning: File 'conftest.f' has modification time 0.15 s in the future
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortran
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN='-lgfortanbegin -lgfortran -lquadmath':
make: Warning: File 'conftest.f' has modification time 0.14 s in the future
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortanbegin
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortran
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN=' -L/usr/lib/gcc/x86_64-linux-gnu/9 -lgfortran':
make: Warning: File 'conftest.f' has modification time 0.13 s in the future
conftest.o: In function `f_':
conftest.f:(.text+0x35): undefined reference to `_gfortran_concat_string'
conftest.f:(.text+0x4a): undefined reference to `_gfortran_pow_i4_i4'
/usr/lib/gcc/x86_64-w64-mingw32/7.3-win32/../../../../x86_64-w64-mingw32/lib/libmingw32.a(lib64_libmingw32_a-pseudo-reloc.o): In function `_pei386_runtime_relocator':
./mingw-w64-crt/crt/pseudo-reloc.c:472: undefined reference to `___chkstk_ms'
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN=' -L/usr/lib/gcc/x86_64-linux-gnu/9 -lgfortanbegin -lgfortran':
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortanbegin
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN=' -L/usr/lib/gcc/x86_64-linux-gnu/9 -lgfortran -lquadmath':
make: Warning: File 'conftest.f' has modification time 0.13 s in the future
conftest.o: In function `f_':
conftest.f:(.text+0x35): undefined reference to `_gfortran_concat_string'
conftest.f:(.text+0x4a): undefined reference to `_gfortran_pow_i4_i4'
/usr/lib/gcc/x86_64-w64-mingw32/7.3-win32/../../../../x86_64-w64-mingw32/lib/libmingw32.a(lib64_libmingw32_a-pseudo-reloc.o): In function `_pei386_runtime_relocator':
./mingw-w64-crt/crt/pseudo-reloc.c:472: undefined reference to `___chkstk_ms'
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1

testing f_compile_c_link with LIBS_FORTRAN=' -L/usr/lib/gcc/x86_64-linux-gnu/9 -lgfortanbegin -lgfortran -lquadmath':
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lgfortanbegin
collect2: error: ld returned 1 exit status
make: *** [test/f_compile_c_link] Error 1