diff --git a/3rdparty/imgui/examples/imgui_impl_win32.cpp b/3rdparty/imgui/examples/imgui_impl_win32.cpp
index 6cf8d630..ca230c3b 100644
--- a/3rdparty/imgui/examples/imgui_impl_win32.cpp
+++ b/3rdparty/imgui/examples/imgui_impl_win32.cpp
@@ -13,6 +13,7 @@
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+#define NOMINMAX
 #include <windows.h>
 #include <tchar.h>
 
diff --git a/3rdparty/imgui/examples/libs/gl3w/GL/gl3w.c b/3rdparty/imgui/examples/libs/gl3w/GL/gl3w.c
index 464e0177..784c0969 100644
--- a/3rdparty/imgui/examples/libs/gl3w/GL/gl3w.c
+++ b/3rdparty/imgui/examples/libs/gl3w/GL/gl3w.c
@@ -7,6 +7,7 @@
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN 1
+#define NOMINMAX
 #include <windows.h>
 
 static HMODULE libgl;
diff --git a/3rdparty/imgui/examples/libs/gl3w/GL/glcorearb.h b/3rdparty/imgui/examples/libs/gl3w/GL/glcorearb.h
index 07cb03e1..d8f6581c 100644
--- a/3rdparty/imgui/examples/libs/gl3w/GL/glcorearb.h
+++ b/3rdparty/imgui/examples/libs/gl3w/GL/glcorearb.h
@@ -57,6 +57,7 @@ extern "C" {
 
 #if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)
 #define WIN32_LEAN_AND_MEAN 1
+#define NOMINMAX
 #include <windows.h>
 #endif
 
diff --git a/3rdparty/imgui/examples/libs/glfw/include/GLFW/glfw3native.h b/3rdparty/imgui/examples/libs/glfw/include/GLFW/glfw3native.h
index 9fa955e9..bc35dde0 100644
--- a/3rdparty/imgui/examples/libs/glfw/include/GLFW/glfw3native.h
+++ b/3rdparty/imgui/examples/libs/glfw/include/GLFW/glfw3native.h
@@ -85,7 +85,8 @@ extern "C" {
  // example to allow applications to correctly declare a GL_ARB_debug_output
  // callback) but windows.h assumes no one will define APIENTRY before it does
  #undef APIENTRY
- #include <windows.h>
+ #define NOMINMAX
+#include <windows.h>
 #elif defined(GLFW_EXPOSE_NATIVE_COCOA)
  #include <ApplicationServices/ApplicationServices.h>
  #if defined(__OBJC__)
diff --git a/3rdparty/imgui/imgui.cpp b/3rdparty/imgui/imgui.cpp
index 26359924..04237f81 100644
--- a/3rdparty/imgui/imgui.cpp
+++ b/3rdparty/imgui/imgui.cpp
@@ -8723,8 +8723,10 @@ static void SettingsHandlerWindow_WriteAll(ImGuiContext* imgui_ctx, ImGuiSetting
 #define WIN32_LEAN_AND_MEAN
 #endif
 #ifndef __MINGW32__
-#include <Windows.h>
+#define NOMINMAX
+#include <windows.h>
 #else
+#define NOMINMAX
 #include <windows.h>
 #endif
 #endif
diff --git a/3rdparty/oourafft/fftsg.cc b/3rdparty/oourafft/fftsg.cc
index d74fbb15..8ee2e187 100644
--- a/3rdparty/oourafft/fftsg.cc
+++ b/3rdparty/oourafft/fftsg.cc
@@ -321,11 +321,41 @@ Appendix :
 
 NEXTPNR_NAMESPACE_BEGIN
 
+void makewt(int nw, int* ip, float* w);
+void cftfsub(int n, float* a, int* ip, int nw, float* w);
+void cftbsub(int n, float* a, int* ip, int nw, float* w);
+void makect(int nc, int* ip, float* c);
+void rftfsub(int n, float* a, int nc, float* c);
+void rftbsub(int n, float* a, int nc, float* c);
+void dctsub(int n, float* a, int nc, float* c);
+void dstsub(int n, float* a, int nc, float* c);
+void bitrv2(int n, int* ip, float* a);
+void bitrv216(float* a);
+void bitrv208(float* a);
+void cftf1st(int n, float* a, float* w);
+void cftrec4(int n, float* a, int nw, float* w);
+void cftleaf(int n, int isplt, float* a, int nw, float* w);
+void cftfx41(int n, float* a, int nw, float* w);
+void cftf161(float* a, float* w);
+void cftf081(float* a, float* w);
+void cftf040(float* a);
+void cftx020(float* a);
+void bitrv2conj(int n, int* ip, float* a);
+void bitrv216neg(float* a);
+void bitrv208neg(float* a);
+void cftb1st(int n, float* a, float* w);
+void cftb040(float* a);
+void makeipt(int nw, int* ip);
+void cftf162(float* a, float* w);
+void cftf082(float* a, float* w);
+void cftmdl1(int n, float* a, float* w);
+void cftmdl2(int n, float* a, float* w);
+int cfttree(int n, int j, int k, float* a, int nw, float* w);
+void* cftrec1_th(void* p);
+void* cftrec2_th(void* p);
+
 void cdft(int n, int isgn, float* a, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void cftbsub(int n, float* a, int* ip, int nw, float* w);
   int nw;
 
   nw = ip[0];
@@ -342,12 +372,6 @@ void cdft(int n, int isgn, float* a, int* ip, float* w)
 
 void rdft(int n, int isgn, float* a, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void makect(int nc, int* ip, float* c);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void cftbsub(int n, float* a, int* ip, int nw, float* w);
-  void rftfsub(int n, float* a, int nc, float* c);
-  void rftbsub(int n, float* a, int nc, float* c);
   int nw, nc;
   float xi;
 
@@ -385,13 +409,6 @@ void rdft(int n, int isgn, float* a, int* ip, float* w)
 
 void ddct(int n, int isgn, float* a, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void makect(int nc, int* ip, float* c);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void cftbsub(int n, float* a, int* ip, int nw, float* w);
-  void rftfsub(int n, float* a, int nc, float* c);
-  void rftbsub(int n, float* a, int nc, float* c);
-  void dctsub(int n, float* a, int nc, float* c);
   int j, nw, nc;
   float xr;
 
@@ -441,13 +458,6 @@ void ddct(int n, int isgn, float* a, int* ip, float* w)
 
 void ddst(int n, int isgn, float* a, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void makect(int nc, int* ip, float* c);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void cftbsub(int n, float* a, int* ip, int nw, float* w);
-  void rftfsub(int n, float* a, int nc, float* c);
-  void rftbsub(int n, float* a, int nc, float* c);
-  void dstsub(int n, float* a, int nc, float* c);
   int j, nw, nc;
   float xr;
 
@@ -496,11 +506,6 @@ void ddst(int n, int isgn, float* a, int* ip, float* w)
 
 void dfct(int n, float* a, float* t, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void makect(int nc, int* ip, float* c);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void rftfsub(int n, float* a, int nc, float* c);
-  void dctsub(int n, float* a, int nc, float* c);
   int j, k, l, m, mh, nw, nc;
   float xr, xi, yr, yi;
 
@@ -588,11 +593,6 @@ void dfct(int n, float* a, float* t, int* ip, float* w)
 
 void dfst(int n, float* a, float* t, int* ip, float* w)
 {
-  void makewt(int nw, int* ip, float* w);
-  void makect(int nc, int* ip, float* c);
-  void cftfsub(int n, float* a, int* ip, int nw, float* w);
-  void rftfsub(int n, float* a, int nc, float* c);
-  void dstsub(int n, float* a, int nc, float* c);
   int j, k, l, m, mh, nw, nc;
   float xr, xi, yr, yi;
 
@@ -673,7 +673,6 @@ void dfst(int n, float* a, float* t, int* ip, float* w)
 
 void makewt(int nw, int* ip, float* w)
 {
-  void makeipt(int nw, int* ip);
   int j, nwh, nw0, nw1;
   float delta, wn4r, wk1r, wk1i, wk3r, wk3i;
 
@@ -808,6 +807,7 @@ void makect(int nc, int* ip, float* c)
 #endif
 #include <stdio.h>
 #include <stdlib.h>
+#define NOMINMAX
 #include <windows.h>
 #define cdft_thread_t HANDLE
 #define cdft_thread_create(thp, func, argp)                               \
@@ -829,17 +829,6 @@ void makect(int nc, int* ip, float* c)
 
 void cftfsub(int n, float* a, int* ip, int nw, float* w)
 {
-  void bitrv2(int n, int* ip, float* a);
-  void bitrv216(float* a);
-  void bitrv208(float* a);
-  void cftf1st(int n, float* a, float* w);
-  void cftrec4(int n, float* a, int nw, float* w);
-  void cftleaf(int n, int isplt, float* a, int nw, float* w);
-  void cftfx41(int n, float* a, int nw, float* w);
-  void cftf161(float* a, float* w);
-  void cftf081(float* a, float* w);
-  void cftf040(float* a);
-  void cftx020(float* a);
 #ifdef USE_CDFT_THREADS
   void cftrec4_th(int n, float* a, int nw, float* w);
 #endif /* USE_CDFT_THREADS */
@@ -876,17 +865,6 @@ void cftfsub(int n, float* a, int* ip, int nw, float* w)
 
 void cftbsub(int n, float* a, int* ip, int nw, float* w)
 {
-  void bitrv2conj(int n, int* ip, float* a);
-  void bitrv216neg(float* a);
-  void bitrv208neg(float* a);
-  void cftb1st(int n, float* a, float* w);
-  void cftrec4(int n, float* a, int nw, float* w);
-  void cftleaf(int n, int isplt, float* a, int nw, float* w);
-  void cftfx41(int n, float* a, int nw, float* w);
-  void cftf161(float* a, float* w);
-  void cftf081(float* a, float* w);
-  void cftb040(float* a);
-  void cftx020(float* a);
 #ifdef USE_CDFT_THREADS
   void cftrec4_th(int n, float* a, int nw, float* w);
 #endif /* USE_CDFT_THREADS */
@@ -2221,8 +2199,6 @@ typedef struct cdft_arg_st cdft_arg_t;
 
 void cftrec4_th(int n, float* a, int nw, float* w)
 {
-  void* cftrec1_th(void* p);
-  void* cftrec2_th(void* p);
   int i, idiv4, m, nthread;
   cdft_thread_t th[4];
   cdft_arg_t ag[4];
@@ -2254,9 +2230,6 @@ void cftrec4_th(int n, float* a, int nw, float* w)
 
 void* cftrec1_th(void* p)
 {
-  int cfttree(int n, int j, int k, float* a, int nw, float* w);
-  void cftleaf(int n, int isplt, float* a, int nw, float* w);
-  void cftmdl1(int n, float* a, float* w);
   int isplt, j, k, m, n, n0, nw;
   float *a, *w;
 
@@ -2282,9 +2255,6 @@ void* cftrec1_th(void* p)
 
 void* cftrec2_th(void* p)
 {
-  int cfttree(int n, int j, int k, float* a, int nw, float* w);
-  void cftleaf(int n, int isplt, float* a, int nw, float* w);
-  void cftmdl2(int n, float* a, float* w);
   int isplt, j, k, m, n, n0, nw;
   float *a, *w;
 
@@ -2313,9 +2283,6 @@ void* cftrec2_th(void* p)
 
 void cftrec4(int n, float* a, int nw, float* w)
 {
-  int cfttree(int n, int j, int k, float* a, int nw, float* w);
-  void cftleaf(int n, int isplt, float* a, int nw, float* w);
-  void cftmdl1(int n, float* a, float* w);
   int isplt, j, k, m;
 
   m = n;
@@ -2334,8 +2301,6 @@ void cftrec4(int n, float* a, int nw, float* w)
 
 int cfttree(int n, int j, int k, float* a, int nw, float* w)
 {
-  void cftmdl1(int n, float* a, float* w);
-  void cftmdl2(int n, float* a, float* w);
   int i, isplt, m;
 
   if ((k & 3) != 0) {
@@ -2368,12 +2333,6 @@ int cfttree(int n, int j, int k, float* a, int nw, float* w)
 
 void cftleaf(int n, int isplt, float* a, int nw, float* w)
 {
-  void cftmdl1(int n, float* a, float* w);
-  void cftmdl2(int n, float* a, float* w);
-  void cftf161(float* a, float* w);
-  void cftf162(float* a, float* w);
-  void cftf081(float* a, float* w);
-  void cftf082(float* a, float* w);
 
   if (n == 512) {
     cftmdl1(128, a, &w[nw - 64]);
@@ -2674,11 +2633,6 @@ void cftmdl2(int n, float* a, float* w)
 
 void cftfx41(int n, float* a, int nw, float* w)
 {
-  void cftf161(float* a, float* w);
-  void cftf162(float* a, float* w);
-  void cftf081(float* a, float* w);
-  void cftf082(float* a, float* w);
-
   if (n == 128) {
     cftf161(a, &w[nw - 8]);
     cftf162(&a[32], &w[nw - 32]);
diff --git a/3rdparty/oourafft/fftsg2d.cc b/3rdparty/oourafft/fftsg2d.cc
index 2bbc2428..5d674ed8 100644
--- a/3rdparty/oourafft/fftsg2d.cc
+++ b/3rdparty/oourafft/fftsg2d.cc
@@ -412,6 +412,7 @@ macro definitions
 #ifndef FFT2D_THREADS_BEGIN_N
 #define FFT2D_THREADS_BEGIN_N 131072
 #endif
+#define NOMINMAX
 #include <windows.h>
 #define fft2d_thread_t HANDLE
 #define fft2d_thread_create(thp, func, argp)                       \
diff --git a/3rdparty/pybind11/docs/advanced/cast/strings.rst b/3rdparty/pybind11/docs/advanced/cast/strings.rst
index e246c521..806b7a25 100644
--- a/3rdparty/pybind11/docs/advanced/cast/strings.rst
+++ b/3rdparty/pybind11/docs/advanced/cast/strings.rst
@@ -174,7 +174,8 @@ decoded to Python ``str``.
 .. code-block:: c++
 
     #define UNICODE
-    #include <windows.h>
+    #define NOMINMAX
+#include <windows.h>
 
     m.def("set_window_text",
         [](HWND hwnd, std::wstring s) {
diff --git a/common/kernel/base_arch.h b/common/kernel/base_arch.h
index ff906bfd..a27e261d 100644
--- a/common/kernel/base_arch.h
+++ b/common/kernel/base_arch.h
@@ -24,7 +24,6 @@
 #include <array>
 #include <vector>
 
-#define NOMINMAX
 #include "arch_api.h"
 #include "base_clusterinfo.h"
 #include "idstring.h"
diff --git a/common/kernel/command.cc b/common/kernel/command.cc
index 565f5fc5..087af5b3 100644
--- a/common/kernel/command.cc
+++ b/common/kernel/command.cc
@@ -46,8 +46,8 @@
 #include "version.h"
 
 #if defined(_WIN32)
-#define NOMINMAX
 #include <io.h>
+#define NOMINMAX
 #include <windows.h>
 #elif defined(__APPLE__)
 #include <dirent.h>
diff --git a/common/kernel/embed.cc b/common/kernel/embed.cc
index 6beb157b..de7f545c 100644
--- a/common/kernel/embed.cc
+++ b/common/kernel/embed.cc
@@ -1,5 +1,6 @@
 #include <map>
 #if defined(WIN32)
+#define NOMINMAX
 #include <windows.h>
 #endif
 #include <boost/filesystem.hpp>
diff --git a/gui/application.cc b/gui/application.cc
index d3260684..b04d4a2f 100644
--- a/gui/application.cc
+++ b/gui/application.cc
@@ -34,6 +34,7 @@
 NEXTPNR_NAMESPACE_BEGIN
 
 #ifdef _WIN32
+#define NOMINMAX
 #include <windows.h>
 BOOL WINAPI WinHandler(DWORD dwCtrlType)
 {