From 42900aaffa5116588da98f4a4c7c52e4398bfc3c Mon Sep 17 00:00:00 2001
From: Jiawei Huang <jiawei@tigera.io>
Date: Sun, 5 Jul 2026 11:42:09 -0700
Subject: [PATCH] build: fix MinGW-w64 cross-compilation for Windows

- Guard the ssize_t and mode_t typedefs that MinGW-w64 already provides.
- Widen the fts.h gate that covers Windows functionality to _WIN32.
- Widen the POSIX-only gates in the cio tool (pwd.h, SIGQUIT/SIGHUP,
  ANSI colors) to _WIN32.
- Lowercase capitalized Windows header includes so they resolve on a
  case-sensitive filesystem when cross-compiling from Linux.
- Link shell32 by its lowercase name so GNU ld resolves the import
  library, and link ws2_32 explicitly. GCC ignores the
  #pragma comment(lib) that MSVC uses for it.

Signed-off-by: Jiawei Huang <jiawei@tigera.io>
---
 include/chunkio/chunkio_compat.h |  2 ++
 src/CMakeLists.txt               |  3 ++-
 src/cio_os.c                     |  2 +-
 src/cio_utils.c                  |  4 ++--
 src/win32/dirent.c               |  2 +-
 tools/cio.c                      | 12 ++++++------
 6 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/include/chunkio/chunkio_compat.h b/include/chunkio/chunkio_compat.h
index 3e4951b..ef125bf 100644
--- a/include/chunkio/chunkio_compat.h
+++ b/include/chunkio/chunkio_compat.h
@@ -42,8 +42,10 @@
 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 #define strerror_r(errno,buf,len) strerror_s(buf,len,errno)
 
+#ifndef __MINGW32__
 typedef SSIZE_T ssize_t;
 typedef unsigned mode_t;
+#endif
 
 static inline char* dirname(const char *path)
 {
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3590143..9d3685f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -23,7 +23,8 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
     )
   set(libs
     ${libs}
-    Shell32.lib)
+    shell32
+    ws2_32)
 else()
   set(src
     ${src}
diff --git a/src/cio_os.c b/src/cio_os.c
index 637b74e..ddbf93a 100644
--- a/src/cio_os.c
+++ b/src/cio_os.c
@@ -28,7 +28,7 @@
 #include <chunkio/chunkio_compat.h>
 
 #ifdef _WIN32
-#include <Shlobj.h>
+#include <shlobj.h>
 #endif
 
 /* Check if a path is a directory */
diff --git a/src/cio_utils.c b/src/cio_utils.c
index ca199d4..0a63cc8 100644
--- a/src/cio_utils.c
+++ b/src/cio_utils.c
@@ -28,7 +28,7 @@
 #include <chunkio/cio_info.h>
 #if defined(CIO_HAVE_BACKEND_FILESYSTEM) && defined(__EMSCRIPTEN__)
 #include <ftw.h>
-#elif defined(CIO_HAVE_BACKEND_FILESYSTEM) && !defined(_MSC_VER)
+#elif defined(CIO_HAVE_BACKEND_FILESYSTEM) && !defined(_WIN32)
 #include <fts.h>
 #endif
 
@@ -64,7 +64,7 @@ int cio_utils_recursive_delete(const char *dir)
      */
     return nftw(dir, cio_utils_remove_entry, 32, FTW_DEPTH | FTW_PHYS | FTW_MOUNT);
 }
-#elif !defined(_MSC_VER)
+#elif !defined(_WIN32)
 /*
  * Taken from StackOverflow:
  *
diff --git a/src/win32/dirent.c b/src/win32/dirent.c
index 020943d..48491f2 100644
--- a/src/win32/dirent.c
+++ b/src/win32/dirent.c
@@ -22,7 +22,7 @@
  * Win32's FIndFirstFile/FindNextFile API.
  */
 
-#include <Windows.h>
+#include <windows.h>
 
 #include "dirent.h"
 
diff --git a/tools/cio.c b/tools/cio.c
index a278276..3e39c23 100644
--- a/tools/cio.c
+++ b/tools/cio.c
@@ -24,7 +24,7 @@
 #include <limits.h>
 #include <signal.h>
 #include <time.h>
-#ifndef _MSC_VER
+#ifndef _WIN32
 #include <pwd.h>
 #endif
 #ifdef __MACH__
@@ -35,7 +35,7 @@
 #include <monkey/mk_core/mk_getopt.h>
 #include <chunkio/chunkio_compat.h>
 
-#ifndef _MSC_VER
+#ifndef _WIN32
 #define ANSI_RESET    "\033[0m"
 #define ANSI_BOLD     "\033[1m"
 #define ANSI_CYAN     "\033[96m"
@@ -121,7 +121,7 @@ static void cio_signal_handler(int signal)
     write(STDERR_FILENO, s, sizeof(s) - 1);
     switch (signal) {
         cio_print_signal(SIGINT);
-#ifndef _MSC_VER
+#ifndef _WIN32
         cio_print_signal(SIGQUIT);
         cio_print_signal(SIGHUP);
 #endif
@@ -132,7 +132,7 @@ static void cio_signal_handler(int signal)
     /* Signal handlers */
     switch (signal) {
     case SIGINT:
-#ifndef _MSC_VER
+#ifndef _WIN32
     case SIGQUIT:
     case SIGHUP:
 #endif
@@ -173,7 +173,7 @@ void cio_bytes_to_human_readable_size(size_t bytes,
 static void cio_signal_init()
 {
     signal(SIGINT,  &cio_signal_handler);
-#ifndef _MSC_VER
+#ifndef _WIN32
     signal(SIGQUIT, &cio_signal_handler);
     signal(SIGHUP,  &cio_signal_handler);
 #endif
@@ -206,7 +206,7 @@ static int log_cb(struct cio_ctx *ctx, int level, const char *file, int line,
     return 0;
 }
 
-#ifndef _MSC_VER
+#ifndef _WIN32
 static int cio_default_root_path(char *path, int size)
 {
     int len;