Add github msys2 workflow

.github/workflows/windows.yml

@@ -0,0 +1,19 @@
+on: push
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+    #- uses: msys2/setup-msys2@v2
+    #  with:
+    #    msystem: msys
+    #    install: gcc make diffutils
+    - uses: actions/checkout@v4
+    - run: |
+        & "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -latest -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -property installationPath
+#mount
+#./configure --host=x86_64-windows-msvc CC=cl
+#gcc line.c
+#./a.exe | od -t ax1
+#od -t ax1 b
+#od -t ax1 c
+#od -t ax1 test/basic.c

configure

@@ -122,10 +122,14 @@ case "$target" in
 	endfiles='"-l", "c", "-l", ":crtn.o"'
 	defines='"-D", "__builtin_stdarg_start(ap, last)=__builtin_va_start(ap, last)"'
 	;;
-*-*msys*)
+*-msys*)
 	startfiles='"-l", ":crt0.o"'
 	endfiles='"-l", "c", "-l", "msys-2.0", "-l", "kernel32"'
 	;;
+*-windows-msvc*)
+	startfiles='"-l", ":crt0.o"'
+	endfiles='"-l", "c"'
+	;;
 *)
 	fail "unknown target '$target', please create config.h manually"
 esac

line.c

@@ -0,0 +1,22 @@
+#include <string.h>
+#include <stdio.h>
+int main(void) {
+	extern int getmode(int);
+	char line[256];
+	fprintf(stderr, "mode 0=%d\n", getmode(0));
+	fprintf(stderr, "mode 1=%d\n", getmode(1));
+	fprintf(stderr, "mode 2=%d\n", getmode(2));
+	puts("hello");
+	FILE *f = fopen("b", "w");
+	fprintf(stderr, "mode b=%d\n", getmode(fileno(f)));
+	fputs("hello\n", f);
+	fclose(f);
+	f = fopen("c", "wt");
+	fprintf(stderr, "mode c=%d\n", getmode(fileno(f)));
+	fputs("hello\n", f);
+	fclose(f);
+	f = fopen("test/basic.c", "r");
+	fgets(line, sizeof line, f);
+	fprintf(stderr, "c=%d %d\n", line[strlen(line) - 2], line[strlen(line) - 1]);
+	fclose(f);
+}