diff --git a/tools/windres.c b/tools/windres.c
new file mode 100644
index 0000000..5171ad3
--- /dev/null
+++ b/tools/windres.c
@@ -0,0 +1,558 @@
+/**
+ * PROJECT:     XTchain
+ * LICENSE:     See COPYING.md in the top level directory
+ * FILE:        tools/windres.c
+ * DESCRIPTION: WINDRES compatible interface to LLVM
+ * DEVELOPERS:  Josh de Kock <josh@itanimul.li>
+ *              Martin Storsjo <martin@martin.st>
+ *              Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include "xtchain.h"
+
+#define WINDRES_VERSION "1.0"
+
+#ifndef DEFAULT_TARGET
+#define DEFAULT_TARGET "x86_64-w64-mingw32"
+#endif
+
+#include <stdarg.h>
+
+#define _tspawnvp_escape _spawnvp
+
+#include <sys/wait.h>
+#include <errno.h>
+
+#define _P_WAIT 0
+
+static
+int
+_spawnvp(int mode,
+         const char *filename,
+         const char * const *argv)
+{
+    pid_t pid;
+
+    if(!(pid = fork()))
+    {
+        execvp(filename, (char **) argv);
+        perror(filename);
+        exit(1);
+    }
+
+    int stat = 0;
+
+    if(waitpid(pid, &stat, 0) == -1)
+    {
+        return -1;
+    }
+
+    if(WIFEXITED(stat))
+    {
+        return WEXITSTATUS(stat);
+    }
+    errno = EIO;
+
+    return -1;
+}
+
+static
+const
+char *unescape_cpp(const char *str)
+{
+    char *out = strdup(str);
+    int len = strlen(str);
+    int i, outpos = 0;
+
+    for(i = 0; i < len - 1; i++)
+    {
+        if(str[i] == '\\' && str[i + 1] == '"')
+        {
+            continue;
+        }
+        out[outpos++] = str[i];
+    }
+
+    while(i < len)
+    {
+        out[outpos++] = str[i++];
+    }
+
+    out[outpos++] = '\0';
+
+    return out;
+}
+
+static
+void print_version(void)
+{
+    printf("XTchain windres (GNU windres compatible) %s\n", WINDRES_VERSION);
+    exit(-1);
+}
+
+static
+void print_help(void)
+{
+    printf(
+    "usage: llvm-windres <OPTION> [INPUT-FILE] [OUTPUT-FILE]\n"
+    "\n"
+    "LLVM Tool to manipulate Windows resources with a GNU windres interface.\n"
+    "\n"
+    "Options:\n"
+    "  -i, --input <arg>          Name of the input file.\n"
+    "  -o, --output <arg>         Name of the output file.\n"
+    "  -J, --input-format <arg>   Input format to read.\n"
+    "  -O, --output-format <arg>  Output format to generate.\n"
+    "  --preprocessor <arg>       Custom preprocessor command.\n"
+    "  --preprocessor-arg <arg>   Preprocessor command arguments.\n"
+    "  -F, --target <arg>         Target for COFF objects to be compiled for.\n"
+    "  -I, --include-dir <arg>    Include directory to pass to preprocessor and resource compiler.\n"
+    "  -D, --define <arg[=val]>   Define to pass to preprocessor.\n"
+    "  -U, --undefine <arg[=val]> Undefine to pass to preprocessor.\n"
+    "  -c, --codepage <arg>       Default codepage to use when reading an rc file (0x0-0xffff).\n"
+    "  -l, --language <arg>       Specify default language (0x0-0xffff).\n"
+    "      --use-temp-file        Use a temporary file for the preprocessing output.\n"
+    "  -v, --verbose              Enable verbose output.\n"
+    "  -V, --version              Display version.\n"
+    "  -h, --help                 Display this message and exit.\n"
+    "Input Formats:\n"
+    "  rc                         Text Windows Resource\n"
+    "  res                        Binary Windows Resource\n"
+    "Output Formats:\n"
+    "  res                        Binary Windows Resource\n"
+    "  coff                       COFF object\n"
+    "Targets:\n"
+    "  pe-x86-64\n"
+    "  pei-x86-64\n"
+    "  pe-i386\n"
+    "  pei-i386\n");
+    exit(1);
+}
+
+static
+void error(const char *basename,
+           const char *fmt,
+           ...)
+{
+    fprintf(stderr, _T(TS": error: "), basename);
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    fprintf(stderr, _T("\n"));
+    va_end(ap);
+    exit(1);
+}
+
+static
+void print_argv(const char **exec_argv)
+{
+    while(*exec_argv)
+    {
+        fprintf(stderr, _T(TS" "), *exec_argv);
+        exec_argv++;
+    }
+
+    fprintf(stderr, _T("\n"));
+}
+
+static
+void check_num_args(int arg,
+                    int max_arg)
+{
+    if(arg > max_arg)
+    {
+        fprintf(stderr, "Too many options added\n");
+        abort();
+    }
+}
+
+int main(int argc,
+         char* argv[])
+{
+    const char *dir;
+    const char *basename;
+    const char *target;
+
+    split_argv(argv[0], &dir, &basename, &target, NULL);
+
+    if (!target)
+        target = _T(DEFAULT_TARGET);
+
+    const char *bfd_target = NULL;
+    const char *input = _T("-");
+    const char *output = _T("/dev/stdout");
+    const char *input_format = _T("rc");
+    const char *output_format = _T("coff");
+    const char **includes = malloc(argc * sizeof(*includes));
+    int nb_includes = 0;
+    const char *codepage = _T("1252");
+    const char *language = NULL;
+    const char **cpp_options = malloc(argc * sizeof(*cpp_options));
+    int nb_cpp_options = 0;
+    int verbose = 0;
+
+#define _tcslen_const(a) (sizeof(a)/sizeof(char) - 1)
+
+#define _tcsstart(a, b) !strncmp(a, b, _tcslen_const(b))
+
+#define IF_MATCH_EITHER(short, long) \
+    if(!strcmp(argv[i], _T(short)) || !strcmp(argv[i], _T(long)))
+
+#define IF_MATCH_THREE(first, second, third) \
+    if(!strcmp(argv[i], _T(first)) || !strcmp(argv[i], _T(second)) || !strcmp(argv[i], _T(third)))
+
+#define OPTION(short, long, var) \
+    if(_tcsstart(argv[i], _T(short)) && argv[i][_tcslen_const(_T(short))]) { \
+        var = argv[i] + _tcslen_const(_T(short)); \
+    } else if(_tcsstart(argv[i], _T(long "="))) { \
+        var = strchr(argv[i], '=') + 1; \
+    } else IF_MATCH_EITHER(short, long) { \
+        if(i + 1 < argc) \
+            var = argv[++i]; \
+        else \
+            error(basename, _T(TS" missing argument"), argv[i]); \
+    }
+
+#define SEPARATE_ARG(var) do { \
+        if(i + 1 < argc) \
+            var = argv[++i]; \
+        else \
+            error(basename, _T(TS" missing argument"), argv[i]); \
+    } while (0)
+
+#define SEPARATE_ARG_PREFIX(var, prefix) do { \
+        if(i + 1 < argc) \
+            var = concat(_T(prefix), argv[++i]); \
+        else \
+            error(basename, _T(TS" missing argument"), argv[i]); \
+    } while (0)
+
+    for(int i = 1; i < argc; i++)
+    {
+        OPTION("-i", "--input", input)
+        else OPTION("-o", "--output", output)
+        else OPTION("-J", "--input-format", input_format)
+        else OPTION("-O", "--output-format", output_format)
+        else OPTION("-F", "--target", bfd_target)
+        else IF_MATCH_THREE("-I", "--include-dir", "--include") {
+            SEPARATE_ARG(includes[nb_includes++]);
+        }
+        else if(_tcsstart(argv[i], _T("--include-dir=")) ||
+                _tcsstart(argv[i], _T("--include=")))
+        {
+            includes[nb_includes++] = strchr(argv[i], '=') + 1;
+        }
+        else if(_tcsstart(argv[i], _T("-I")))
+        {
+            includes[nb_includes++] = argv[i] + 2;
+        }
+        else OPTION("-c", "--codepage", codepage)
+        else OPTION("-l", "--language", language)
+        else if(!strcmp(argv[i], _T("--preprocessor")))
+        {
+            error(basename, _T("ENOSYS"));
+        }
+        else if(_tcsstart(argv[i], _T("--preprocessor-arg=")))
+        {
+            cpp_options[nb_cpp_options++] = strchr(argv[i], '=') + 1;
+        }
+        else if(!strcmp(argv[i], _T("--preprocessor-arg")))
+        {
+            SEPARATE_ARG(cpp_options[nb_cpp_options++]);
+        }
+        else IF_MATCH_EITHER("-D", "--define")
+        {
+            SEPARATE_ARG_PREFIX(cpp_options[nb_cpp_options++], "-D");
+        }
+        else if(_tcsstart(argv[i], _T("-D")))
+        {
+            cpp_options[nb_cpp_options++] = argv[i];
+        }
+        else IF_MATCH_EITHER("-U", "--undefine")
+        {
+            SEPARATE_ARG_PREFIX(cpp_options[nb_cpp_options++], "-U");
+        }
+        else if(_tcsstart(argv[i], _T("-U")))
+        {
+            cpp_options[nb_cpp_options++] = argv[i];
+        }
+        else IF_MATCH_EITHER("-v", "--verbose")
+        {
+            verbose = 1;
+        }
+        else IF_MATCH_EITHER("-V", "--version")
+        {
+            print_version();
+        }
+        else IF_MATCH_EITHER("-h", "--help")
+        {
+            print_help();
+        }
+        else if(!strcmp(argv[i], _T("--use-temp-file")))
+        {
+            // No-op, we use a temp file by default.
+        }
+        else if(_tcsstart(argv[i], _T("-")))
+        {
+            error(basename, _T("unrecognized option: `"TS"'"), argv[i]);
+        }
+        else
+        {
+            if(!strcmp(input, _T("-")))
+            {
+                input = argv[i];
+            }
+            else if(!strcmp(output, _T("/dev/stdout")))
+            {
+                output = argv[i];
+            }
+            else
+            {
+                error(basename, _T("rip: `"TS"'"), argv[i]);
+            }
+        }
+    }
+
+    if(bfd_target)
+    {
+        if(!strcmp(bfd_target, _T("pe-x86-64")) ||
+           !strcmp(bfd_target, _T("pei-x86-64")))
+        {
+           target = _T("x86_64-w64-mingw32");
+        }
+        else if(!strcmp(bfd_target, _T("pe-i386")) ||
+                !strcmp(bfd_target, _T("pei-i386")))
+        {
+            target = _T("i686-w64-mingw32");
+        }
+        else
+        {
+            error(basename, _T("unsupported target: `"TS"'"), bfd_target);
+        }
+    }
+
+    char *arch = strdup(target);
+    char *dash = strchr(arch, '-');
+    if(dash)
+    {
+        *dash = '\0';
+    }
+
+    const char *machine = _T("unknown");
+
+    if(!strcmp(arch, _T("i686")))
+    {
+        machine = _T("X86");
+    }
+    else if(!strcmp(arch, _T("x86_64")))
+    {
+        machine = _T("X64");
+    }
+    else if(!strcmp(arch, _T("armv7")))
+    {
+        machine = _T("ARM");
+    }
+    else if(!strcmp(arch, _T("aarch64")))
+    {
+        machine = _T("ARM64");
+    }
+
+    const char *CC = concat(target, _T("-clang"));
+    const char **rc_options = malloc(2 * argc * sizeof(*cpp_options));
+    int nb_rc_options = 0;
+
+    for(int i = 0; i < nb_includes; i++)
+    {
+        cpp_options[nb_cpp_options++] = concat(_T("-I"), includes[i]);
+        rc_options[nb_rc_options++] = _T("-I");
+        rc_options[nb_rc_options++] = includes[i];
+    }
+
+    for(int i = 0; i < nb_cpp_options; i++)
+    {
+        cpp_options[i] = unescape_cpp(cpp_options[i]);
+    }
+
+    const char *preproc_rc = concat(output, _T(".preproc.rc"));
+    const char *res = concat(output, _T(".out.res"));
+
+    char *inputdir = strdup(input);
+    {
+        char *sep = _tcsrchrs(inputdir, '/', '\\');
+        if(sep)
+        {
+            *sep = '\0';
+        }
+        else
+        {
+            inputdir = strdup(_T("."));
+        }
+    }
+
+    int max_arg = 2 * argc + 20;
+    const char **exec_argv = malloc((max_arg + 1) * sizeof(*exec_argv));
+    int arg = 0;
+
+    if(!_tcsicmp(input_format, _T("rc")))
+    {
+        exec_argv[arg++] = concat(dir, CC);
+        exec_argv[arg++] = _T("-E");
+
+        for(int i = 0; i < nb_cpp_options; i++)
+        {
+            exec_argv[arg++] = cpp_options[i];
+        }
+
+        exec_argv[arg++] = _T("-xc");
+        exec_argv[arg++] = _T("-DRC_INVOKED=1");
+        exec_argv[arg++] = input;
+        exec_argv[arg++] = _T("-o");
+        exec_argv[arg++] = preproc_rc;
+        exec_argv[arg] = NULL;
+
+        check_num_args(arg, max_arg);
+
+        if(verbose)
+        {
+            print_argv(exec_argv);
+        }
+
+        int ret = _tspawnvp_escape(_P_WAIT, exec_argv[0], exec_argv);
+
+        if(ret == -1)
+        {
+            perror(exec_argv[0]);
+            return 1;
+        }
+
+        if(ret != 0)
+        {
+            error(basename, _T("preprocessor failed"));
+            return ret;
+        }
+
+        arg = 0;
+        exec_argv[arg++] = concat(dir, _T("llvm-rc"));
+
+        for(int i = 0; i < nb_rc_options; i++)
+        {
+            exec_argv[arg++] = rc_options[i];
+        }
+
+        exec_argv[arg++] = _T("-I");
+        exec_argv[arg++] = inputdir;
+        exec_argv[arg++] = preproc_rc;
+        exec_argv[arg++] = _T("-c");
+        exec_argv[arg++] = codepage;
+
+        if(language)
+        {
+            exec_argv[arg++] = _T("-l");
+            exec_argv[arg++] = language;
+        }
+
+        exec_argv[arg++] = _T("-fo");
+
+        if(!_tcsicmp(output_format, _T("res")))
+        {
+            exec_argv[arg++] = output;
+        }
+        else
+        {
+            exec_argv[arg++] = res;
+        }
+
+        exec_argv[arg] = NULL;
+        check_num_args(arg, max_arg);
+
+        if(verbose)
+        {
+            print_argv(exec_argv);
+        }
+
+        ret = _tspawnvp_escape(_P_WAIT, exec_argv[0], exec_argv);
+
+        if(ret == -1)
+        {
+            perror(exec_argv[0]);
+            return 1;
+        }
+
+        if(ret != 0)
+        {
+            error(basename, _T("llvm-rc failed"));
+            if(!verbose)
+            {
+                unlink(preproc_rc);
+            }
+            return ret;
+        }
+
+        if(!_tcsicmp(output_format, _T("res")))
+        {
+            // All done
+        }
+        else if(!_tcsicmp(output_format, _T("coff")))
+        {
+            arg = 0;
+            exec_argv[arg++] = concat(dir, _T("llvm-cvtres"));
+            exec_argv[arg++] = res;
+            exec_argv[arg++] = concat(_T("-machine:"), machine);
+            exec_argv[arg++] = concat(_T("-out:"), output);
+            exec_argv[arg] = NULL;
+
+            check_num_args(arg, max_arg);
+            if(verbose)
+            {
+                print_argv(exec_argv);
+            }
+
+            int ret = _tspawnvp_escape(_P_WAIT, exec_argv[0], exec_argv);
+            if(ret == -1)
+            {
+                perror(exec_argv[0]);
+                return 1;
+            }
+
+            if(!verbose)
+            {
+                unlink(preproc_rc);
+                unlink(res);
+            }
+
+            return ret;
+        } else {
+            error(basename, _T("invalid output format: `"TS"'"), output_format);
+        }
+    }
+    else if(!_tcsicmp(input_format, _T("res")))
+    {
+        exec_argv[arg++] = concat(dir, _T("llvm-cvtres"));
+        exec_argv[arg++] = input;
+        exec_argv[arg++] = concat(_T("-machine:"), machine);
+        exec_argv[arg++] = concat(_T("-out:"), output);
+        exec_argv[arg] = NULL;
+
+        check_num_args(arg, max_arg);
+
+        if(verbose)
+        {
+            print_argv(exec_argv);
+        }
+
+        int ret = _tspawnvp_escape(_P_WAIT, exec_argv[0], exec_argv);
+        if(ret == -1)
+        {
+            perror(exec_argv[0]);
+            return 1;
+        }
+
+        return ret;
+    }
+    else
+    {
+        error(basename, _T("invalid input format: `"TS"'"), input_format);
+    }
+
+    return 0;
+}
diff --git a/tools/xtchain.h b/tools/xtchain.h
new file mode 100644
index 0000000..be7e22f
--- /dev/null
+++ b/tools/xtchain.h
@@ -0,0 +1,162 @@
+/**
+ * PROJECT:     XTchain
+ * LICENSE:     See COPYING.md in the top level directory
+ * FILE:        tools/xtchain.h
+ * DESCRIPTION: Common header for XTchain tools
+ * DEVELOPERS:  Martin Storsjo <martin@martin.st>
+ *              Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#ifdef UNICODE
+#define _UNICODE
+#endif
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define _T(x) x
+
+#ifdef _UNICODE
+#define TS "%ls"
+#else
+#define TS "%s"
+#endif
+
+static
+inline
+int
+_tcsicmp(const char *a,
+         const char *b)
+{
+    while(*a && tolower(*a) == tolower(*b))
+    {
+        a++;
+        b++;
+    }
+
+    return *a - *b;
+}
+
+static
+inline
+char *
+concat(const char *prefix,
+       const char *suffix)
+{
+    int prefixlen = strlen(prefix);
+    int suffixlen = strlen(suffix);
+
+    char *buf = malloc((prefixlen + suffixlen + 1) * sizeof(*buf));
+
+    strcpy(buf, prefix);
+    strcpy(buf + prefixlen, suffix);
+
+    return buf;
+}
+
+static
+inline
+char *
+_tcsrchrs(const char *str,
+          char char1,
+          char char2)
+{
+    char *ptr1 = strrchr(str, char1);
+    char *ptr2 = strrchr(str, char2);
+
+    if(!ptr1)
+    {
+        return ptr2;
+    }
+
+    if(!ptr2)
+    {
+        return ptr1;
+    }
+
+    if(ptr1 < ptr2)
+    {
+        return ptr2;
+    }
+
+    return ptr1;
+}
+
+static
+inline
+void
+split_argv(const char *argv0,
+           char **dir_ptr,
+           char **basename_ptr,
+           char **target_ptr,
+           char **exe_ptr)
+{
+    const char *sep = _tcsrchrs(argv0, '/', '\\');
+    char *dir = strdup(_T(""));
+    const char *basename = argv0;
+
+    if(sep)
+    {
+        dir = strdup(argv0);
+        dir[sep + 1 - argv0] = '\0';
+        basename = sep + 1;
+    }
+
+    basename = strdup(basename);
+    char *period = strchr(basename, '.');
+
+    if(period)
+    {
+        *period = '\0';
+    }
+
+    char *target = strdup(basename);
+    char *dash = strrchr(target, '-');
+    const char *exe = basename;
+
+    if(dash)
+    {
+        *dash = '\0';
+        exe = dash + 1;
+    }
+    else
+    {
+        target = NULL;
+    }
+
+    if(dir_ptr)
+    {
+        *dir_ptr = dir;
+    }
+
+    if(basename_ptr)
+    {
+        *basename_ptr = basename;
+    }
+
+    if(target_ptr)
+    {
+        *target_ptr = target;
+    }
+
+    if(exe_ptr)
+    {
+        *exe_ptr = exe;
+    }
+}
+
+static
+inline
+int
+run_final(const char *executable,
+          const char *const *argv)
+{
+    execvp(executable, (char **) argv);
+    perror(executable);
+
+    return 1;
+}