Add Cygwin compatibility.

.github/workflows/ci.yml

@@ -350,3 +350,39 @@ jobs:
           emmake make -C build qjs_wasm -j$(getconf _NPROCESSORS_ONLN)
       - name: result
         run: ls -lh build
+
+  cygwin:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: C:\cygwin\bin\bash.exe --login --norc -eo pipefail -o igncr '{0}'
+    steps:
+      - name: Set up Cygwin
+        uses: cygwin/cygwin-install-action@master
+        with:
+            packages: make cmake gcc-g++ bash
+
+      - uses: actions/checkout@v3
+
+      - name: build
+
+        # Plain `make` fails here with this error:
+        #   No rule to make target '/cygdrive/d/a/quickjs-ng/quickjs-ng/cutils.c',
+        #   needed by 'CMakeFiles/qjs.dir/cutils.c.o'. Stop.
+        #
+        # For some reason, making the build directory then `make`ing in there
+        # fixes it.
+        run: |
+          cd $GITHUB_WORKSPACE
+          make build/CMakeCache.txt
+          make --directory build
+
+      - name: stats
+        run: |
+          cd $GITHUB_WORKSPACE
+          make --debug stats
+
+      - name: test
+        run: |
+          cd $GITHUB_WORKSPACE
+          make --debug test

qjs.c

@@ -36,7 +36,7 @@
 #include <time.h>
 #if defined(__APPLE__)
 #include <malloc/malloc.h>
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__CYGWIN__)
 #include <malloc.h>
 #endif
 
@@ -259,7 +259,7 @@ static const JSMallocFunctions trace_mf = {
     (size_t (*)(const void *))_msize,
 #elif defined(EMSCRIPTEN)
     NULL,
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__CYGWIN__)
     (size_t (*)(const void *))malloc_usable_size,
 #else
     /* change this to `NULL,` if compilation fails */

quickjs-libc.c

@@ -3582,6 +3582,8 @@ void js_std_set_worker_new_context_func(JSContext *(*func)(JSRuntime *rt))
 #define OS_PLATFORM "darwin"
 #elif defined(EMSCRIPTEN)
 #define OS_PLATFORM "js"
+#elif defined(__CYGWIN__)
+#define OS_PLATFORM "cygwin"
 #else
 #define OS_PLATFORM "linux"
 #endif

quickjs.c

@@ -38,7 +38,7 @@
 #include <math.h>
 #if defined(__APPLE__)
 #include <malloc/malloc.h>
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__CYGWIN__)
 #include <malloc.h>
 #elif defined(__FreeBSD__)
 #include <malloc_np.h>
@@ -1722,7 +1722,7 @@ static const JSMallocFunctions def_malloc_funcs = {
     (size_t (*)(const void *))_msize,
 #elif defined(EMSCRIPTEN)
     NULL,
-#elif defined(__linux__)
+#elif defined(__linux__) || defined (__CYGWIN__)
     (size_t (*)(const void *))malloc_usable_size,
 #else
     /* change this to `NULL,` if compilation fails */

run-test262.c

@@ -1668,7 +1668,7 @@ int run_test(const char *filename, int index)
                 /* XXX: should extract the phase */
                 char *q = find_tag(p, "type:", &state);
                 if (q) {
-                    while (isspace(*q))
+                    while (isspace((unsigned char)*q))
                         q++;
                     error_type = strdup_len(q, strcspn(q, " \n"));
                 }
@@ -2089,7 +2089,7 @@ int main(int argc, char **argv)
     update_exclude_dirs();
 
     if (is_dir_list) {
-        if (optind < argc && !isdigit(argv[optind][0])) {
+        if (optind < argc && !isdigit((unsigned char)argv[optind][0])) {
             filename = argv[optind++];
             namelist_load(&test_list, filename);
         }

tests/test_builtin.js

@@ -345,8 +345,8 @@ function test_number()
     assert(Number.isNaN(Number("-")));
     assert(Number.isNaN(Number("\x00a")));
 
-    // TODO: Fix rounding errors on Windows.
-    if (os.platform === 'win32') {
+    // TODO: Fix rounding errors on Windows/Cygwin.
+    if (['win32', 'cygwin'].includes(os.platform)) {
         return;
     }