fswatch fails to build on windows 11 using cygwin

[katjuncker]

I followed the instructions in the .md files and installed Cygwin and the latest packages mentioned.

The first step works, but the build fails on ./configure because the select function is missing.

Any ideas what I might be doing wrong?

Output:

$ ./autogen.sh --force
autoreconf-2.71: export WARNINGS=all
autoreconf-2.71: Entering directory '.'
autoreconf-2.71: running: autopoint --force
autoreconf-2.71: running: aclocal --force -I m4
autoreconf-2.71: configure.ac: tracing
autoreconf-2.71: running: libtoolize --copy --force
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'config'.
libtoolize: copying file 'config/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
autoreconf-2.71: configure.ac: not using Intltool
autoreconf-2.71: configure.ac: not using Gtkdoc
autoreconf-2.71: running: aclocal --force -I m4
autoreconf-2.71: running: /usr/bin/autoconf-2.71 --force
autoreconf-2.71: running: /usr/bin/autoheader-2.71 --force
autoreconf-2.71: running: automake --add-missing --copy --force-missing
configure.ac:55: installing 'config/compile'
configure.ac:53: installing 'config/missing'
fswatch/src/Makefile.am: installing 'config/depcomp'
autoreconf-2.71: 'config/config.sub' is updated
autoreconf-2.71: 'config/config.guess' is updated
autoreconf-2.71: Leaving directory '.'

me@pc~/fswatch-1.17.1
$ ./configure
checking build system type... x86_64-pc-cygwin
checking host system type... x86_64-pc-cygwin
checking target system type... x86_64-pc-cygwin
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a race-free mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... no
checking whether make supports nested variables... no
checking whether make supports nested variables... (cached) no
checking whether make supports the include directive... no
checking for gcc... 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... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc accepts -g... yes
checking for gcc option to enable C11 features... none needed
checking whether gcc understands -c and -o together... yes
checking dependency style of gcc... none
checking for ar... ar
checking the archiver (ar) interface... ar
checking for clang++... no
checking for g++... g++
checking whether the compiler supports GNU C++... yes
checking whether g++ accepts -g... yes
checking for g++ option to enable C++11 features... none needed
checking dependency style of g++... none
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by gcc... /usr/x86_64-pc-cygwin/bin/ld.exe
checking if the linker (/usr/x86_64-pc-cygwin/bin/ld.exe) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 8192
checking how to convert x86_64-pc-cygwin file names to x86_64-pc-cygwin format... func_convert_file_noop
checking how to convert x86_64-pc-cygwin file names to toolchain format... func_convert_file_noop
checking for /usr/x86_64-pc-cygwin/bin/ld.exe option to reload object files... -r
checking for file... file
checking for objdump... objdump
checking how to recognize dependent libraries... file_magic ^x86 archive import|^x86 DLL
checking for dlltool... dlltool
checking how to associate runtime and link libraries... func_cygming_dll_for_implib
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for a working dd... /usr/bin/dd
checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1
checking for mt... no
checking if : is a manifest tool... no
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for dlfcn.h... no
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -DDLL_EXPORT -DPIC
checking if gcc PIC flag -DDLL_EXPORT -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/x86_64-pc-cygwin/bin/ld.exe) 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... yes
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... /usr/x86_64-pc-cygwin/bin/ld.exe
checking if the linker (/usr/x86_64-pc-cygwin/bin/ld.exe) is GNU ld... yes
checking whether the g++ linker (/usr/x86_64-pc-cygwin/bin/ld.exe) supports shared libraries... yes
checking for g++ option to produce PIC... -DDLL_EXPORT -DPIC
checking if g++ PIC flag -DDLL_EXPORT -DPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (/usr/x86_64-pc-cygwin/bin/ld.exe) supports shared libraries... yes
checking dynamic linker characteristics... Win32 ld.exe
checking how to hardcode library paths into programs... immediate
checking for C++ compiler vendor... gnu
checking for C++ compiler version... 8.3.0
checking for doxygen... no
configure: WARNING: Doxygen support disabled
checking for makeinfo... /usr/bin/makeinfo
checking whether NLS is requested... yes
checking for msgfmt... /usr/bin/msgfmt
checking for gmsgfmt... /usr/bin/msgfmt
checking for xgettext... /usr/bin/xgettext
checking for msgmerge... /usr/bin/msgmerge
checking for ld used by gcc... /usr/x86_64-pc-cygwin/bin/ld.exe
checking if the linker (/usr/x86_64-pc-cygwin/bin/ld.exe) is GNU ld... yes
checking for shared library run path origin... done
checking for CFPreferencesCopyAppValue... no
checking for CFLocaleCopyCurrent... no
checking for GNU gettext in libc... no
checking for iconv... yes
checking for working iconv... yes
checking how to link with libiconv... -liconv
checking for GNU gettext in libintl... no
checking whether to use NLS... no
checking whether g++ supports C++11 features by default... yes
checking CXXFLAGS for most reasonable warnings... -Wall
checking for pthread_create in -lpthread... yes
checking for cstdlib... yes
checking for unistd.h... (cached) yes
checking for fcntl.h... yes
checking for unordered_map... yes
checking for unordered_set... yes
checking for getopt.h... yes
checking for sys/event.h... no
checking for g++ options needed to detect all undeclared functions... none needed
checking for port.h... no
checking for sys/inotify.h... no
checking for windows.h... yes
checking whether FindFirstChangeNotification is declared... yes
checking whether FindNextChangeNotification is declared... yes
checking whether FindCloseChangeNotification is declared... yes
checking whether WaitForSingleObject is declared... yes
checking whether ReadDirectoryChangesW is declared... yes
checking for sys/cygwin.h... no
checking for mutex... yes
checking for atomic... yes
checking for _Bool... no
checking for stdbool.h that conforms to C99... yes
checking for size_t... yes
checking for ssize_t... yes
checking for uint32_t... yes
checking for mode_t... yes
checking for struct stat.st_mtime... yes
checking for struct stat.st_mtimespec... no
checking for std::unique_ptr<std::string>... yes
checking whether lstat correctly handles trailing slash... no
checking for modf... yes
checking for select... no
configure: error: The select function cannot be found.