I found a problem with linking many files in Cygwin64. It works fine in
bash but from the Windows shell I get the below. To repeat, download the
latest version of my editor from http://www.bengtl.net/files/mg3a/
Extract into a directory, go there and type "make". Since it's when
linking many files this seems the easiest to repeat. There is no problem
in Cygwin32, either from bash or the Windows shell.

I have tried reinstalling the latest Cygwin, and rebooted.

These are the errors when compiling with "make" from the Windows shell:

gcc -pipe -O2 -DDIRED -DPREFIXREGION -c basic.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c dir.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c dired.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c file.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c line.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c match.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c paragraph.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c random.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c region.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c search.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c ucs.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c util.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c variables.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c version.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c width.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c window.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c word.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c langmode_c.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c ucsnames.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c buffer.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c display.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c echo.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c extend.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c help.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c kbd.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c keymap.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c macro.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c main.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c modes.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c cinfo.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c spawn.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c ttyio.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c tty.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c ttykbd.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -c fileio.c
gcc -pipe -O2 -DDIRED -DPREFIXREGION -o mg basic.o dir.o dired.o file.o
line.o match.o paragraph.o random.o region.o search.o ucs.o util.o
variables.o version.o width.o window.o word.o langmode_c.o ucsnames.o
buffer.o display.o echo.o extend.o help.o kbd.o keymap.o macro.o main.o
modes.o cinfo.o spawn.o ttyio.o tty.o ttykbd.o fileio.o -lcurses
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find macro.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find main.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find modes.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find cinfo.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find spawn.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find ttyio.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find tty.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find ttykbd.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find fileio.o: Too many open files
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lcurses
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -ladvapi32
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lshell32
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -luser32
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lkernel32
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../x86_64-pc-cygwin/bin/ld:
cannot find /usr/lib/gcc/x86_64-pc-cygwin/4.8.2/crtend.o: Too many open
files
collect2: error: ld returned 1 exit status
Makefile:68: recipe for target 'mg' failed
make: *** [mg] Error 1