fix for build using MINGW-10.0 with msys2

Makefile

@@ -7,7 +7,7 @@ DEVFLAGS = -O0 -g3 -DDEBUG -Wunused -Wreturn-type -Wimplicit-int #-Wall
 OS := $(shell uname -s | tr "[:upper:]" "[:lower:]")
 
 # Win-64
-ifeq (mingw32_nt-6.2,$(OS))
+ifeq (mingw64_nt-10.0,$(OS))
 CC=gcc -DWIN32=1
 PRODFLAGS += -D_FILE_OFFSET_BITS=64
 LDFLAGS = -lws2_32 -static -lpthread
@@ -19,7 +19,7 @@ OBJS= src/win/mman.o src/win/dlfcn.o src/win/safe-ctype.o src/win/fnmatch.o \
 endif
 
 # Win-32
-ifeq (mingw32_nt-6.0,$(OS))
+ifeq (mingw32_nt-10.0,$(OS))
 CC=gcc -DWIN32=1
 LDFLAGS = -lws2_32 -static -lpthread
 OBJS= src/win/mman.o src/win/dlfcn.o src/win/safe-ctype.o src/win/fnmatch.o \
@@ -131,15 +131,15 @@ TAGS: *.c *.h
 .PHONY: all clean install android-debug
 
 # Dependencies.
-ifeq (mingw32_nt-6.2,$(OS))
+ifeq (mingw64_nt-10.0,$(OS))
 src/win/dlfcn.c: src/win/dlfcn.h
 src/win/mman.c: src/win/mman.h
 src/win/safe-ctype.c: src/win/safe-ctype.h
 src/win/fnmatch.c: src/win/fnmatch.h src/win/safe-ctype.h src/win/ansidecl.h
 src/*.o: src/incs.h src/ts.h Makefile src/k.h src/win/mman.h src/win/dlfcn.h
 endif
 
-ifeq (mingw32_nt-6.0,$(OS))
+ifeq (mingw32_nt-10.0,$(OS))
 src/win/dlfcn.c: src/win/dlfcn.h
 src/win/mman.c: src/win/mman.h
 src/win/safe-ctype.c: src/win/safe-ctype.h

src/c.c

@@ -29,7 +29,9 @@ S fBreak = "t";
 
 void boilerplate()
 {
-  if(!isatty(STDOUT) || !isatty(STDIN)) R;
+  #ifndef __MINGW32__
+    if(!isatty(STDOUT) || !isatty(STDIN)) R;		//kluge:  isatty() fails using mingw-10.0 with msys2
+  #endif
   O("K Console - Enter \\ for help\n\n");
   prompt(0);
 }

src/kc.c

@@ -249,8 +249,13 @@ I lines(FILE*f) {
 I line(FILE*f, S*a, I*n, PDA*p) {  //just starting or just executed: *a=*n=*p=0,  intermediate is non-zero
   S s=0; I b=0,c=0,m=0; K k; F d; fer=0;
 
-  //I o = isatty(STDIN) && f==stdin; //display results to stdout?
-  I o = isatty(STDIN); //display results to stdout?
+  //kluge:  isatty() fails using mingw-10.0 with msys2 
+  #ifndef __MINGW32__
+    //I o = isatty(STDIN) && f==stdin; //display results to stdout?
+    I o = isatty(STDIN); //display results to stdout?
+  #else
+    I o = 1;
+  #endif
 
   if(-1==(c=getline_(&s,&m,f))) GC;
   if(fln&&(s[0]=='#' && s[1]=='!')) GC;