Use /MD on windows.

Just makes things easier. Assume machines have msvcrt.dll
on them. If not, we can add msvcrt.dll to the dist folder and add to
installer.

auxbin/jpm

@@ -116,14 +116,14 @@
 (def default-lflags (if is-win ["/nologo"] []))
 (def default-cflags
   (if is-win
-    ["/nologo"]
+    ["/nologo" "/MD"]
     ["-std=c99" "-Wall" "-Wextra"]))
 
 # Required flags for dynamic libraries. These
 # are used no matter what for dynamic libraries.
 (def- dynamic-cflags
   (if is-win
-    []
+    ["/LD"]
     ["-fPIC"]))
 (def- dynamic-lflags
     (if is-win

build_win.bat

@@ -19,7 +19,7 @@
 
 @rem Set compile and link options here
 @setlocal
-@set JANET_COMPILE=cl /nologo /Isrc\include /Isrc\conf /c /O2 /W3 /D_CRT_SECURE_NO_WARNINGS
+@set JANET_COMPILE=cl /nologo /Isrc\include /Isrc\conf /c /O2 /W3 /D_CRT_SECURE_NO_WARNINGS /MD
 @set JANET_LINK=link /nologo
 @set JANET_LINK_STATIC=lib /nologo
 

src/mainclient/main.c

@@ -46,25 +46,6 @@ int main(int argc, char **argv) {
     dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
     SetConsoleMode(hOut, dwMode);
     SetConsoleOutputCP(65001);
-
-    /* Add directory containing janet.exe as DLL search path for
-    dynamic modules on windows. This is needed because dynamic modules reference
-    janet.exe for symbols. Otherwise, janet.exe would have to be in the current directory
-    to load natives correctly. */
-#ifndef JANET_NO_DYNAMIC_MODULES
-    {
-        SetDefaultDllDirectories(LOAD_LIBRARY_SEARCH_USER_DIRS);
-        HMODULE hModule = GetModuleHandleW(NULL);
-        wchar_t path[MAX_PATH];
-        GetModuleFileNameW(hModule, path, MAX_PATH);
-        size_t i = wcsnlen(path, MAX_PATH);
-        while (i > 0 && path[i] != '\\')
-            path[i--] = '\0';
-        if (i) AddDllDirectory(path);
-        GetCurrentDirectoryW(MAX_PATH, path);
-        AddDllDirectory(path);
-    }
-#endif
 #endif
 
     /* Set up VM */