diff -uNr tcc-0.9.26.orig/libtcc.c tcc-0.9.26-1tclio/libtcc.c
--- tcc-0.9.26.orig/libtcc.c	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/libtcc.c	2014-05-01 20:13:50.626814210 -0500
@@ -669,7 +669,7 @@
     bf->line_num = 1;
     bf->ifndef_macro = 0;
     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
-    bf->fd = -1;
+    bf->fd = NULL;
     bf->prev = file;

     ElfW(Ehdr) ehdr;
-    int fd, ret, size;
+    int ret, size;
+    Tcl_Channel ret_chan, fd;
 
     /* find source file type with extension */
     ext = tcc_fileextension(filename);
@@ -1113,11 +1123,12 @@
 #endif
 
     /* open the file */
-    ret = tcc_open(s1, filename);
-    if (ret < 0) {
+    ret = 0;
+    ret_chan = tcc_open(s1, filename);
+    if (ret_chan == NULL) {
         if (flags & AFF_PRINT_ERROR)
             tcc_error_noabort("file '%s' not found", filename);
-        return ret;
+        return -1;
     }
 
     /* update target deps */
@@ -1151,8 +1162,8 @@
 
     fd = file->fd;
     /* assume executable format: auto guess file type */
-    size = read(fd, &ehdr, sizeof(ehdr));
-    lseek(fd, 0, SEEK_SET);
+    size = Tcl_Read(fd, (char *)&ehdr, sizeof(ehdr));
+    Tcl_Seek(fd, 0, SEEK_SET);
     if (size <= 0) {
         tcc_error_noabort("could not read header");
         goto the_end;
diff -uNr tcc-0.9.26.orig/tcc.h tcc-0.9.26-1tclio/tcc.h
--- tcc-0.9.26.orig/tcc.h	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/tcc.h	2014-05-01 19:55:39.093986611 -0500
@@ -429,7 +429,7 @@
 typedef struct BufferedFile {
     uint8_t *buf_ptr;
     uint8_t *buf_end;
-    int fd;
+    Tcl_Channel fd;
     struct BufferedFile *prev;
     int line_num;    /* current line number - here to simplify code */
     int ifndef_macro;  /* #ifndef macro / #endif search */
@@ -1045,7 +1045,7 @@
 ST_FUNC Sym *global_identifier_push(int v, int t, int c);
 
 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen);
-ST_FUNC int tcc_open(TCCState *s1, const char *filename);
+ST_FUNC Tcl_Channel tcc_open(TCCState *s1, const char *filename);
 ST_FUNC void tcc_close(void);
 
 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags);
@@ -1226,8 +1226,8 @@
 ST_FUNC void relocate_section(TCCState *s1, Section *s);
 
 ST_FUNC void tcc_add_linker_symbols(TCCState *s1);
-ST_FUNC int tcc_load_object_file(TCCState *s1, int fd, unsigned long file_offset);
-ST_FUNC int tcc_load_archive(TCCState *s1, int fd);
+ST_FUNC int tcc_load_object_file(TCCState *s1, Tcl_Channel fd, unsigned long file_offset);
+ST_FUNC int tcc_load_archive(TCCState *s1, Tcl_Channel fd);
 ST_FUNC void tcc_add_bcheck(TCCState *s1);
 
 ST_FUNC void build_got_entries(TCCState *s1);
@@ -1239,7 +1239,7 @@
 #endif
 
 #ifndef TCC_TARGET_PE
-ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level);
+ST_FUNC int tcc_load_dll(TCCState *s1, Tcl_Channel fd, const char *filename, int level);
 ST_FUNC int tcc_load_ldscript(TCCState *s1);
 ST_FUNC uint8_t *parse_comment(uint8_t *p);
 ST_FUNC void minp(void);
@@ -1313,7 +1313,7 @@
 
 #ifdef TCC_TARGET_COFF
 ST_FUNC int tcc_output_coff(TCCState *s1, FILE *f);
-ST_FUNC int tcc_load_coff(TCCState * s1, int fd);
+ST_FUNC int tcc_load_coff(TCCState * s1, Tcl_Channel fd);
 #endif
 
 /* ------------ tccasm.c ------------ */
@@ -1335,7 +1335,7 @@
 
 /* ------------ tccpe.c -------------- */
 #ifdef TCC_TARGET_PE
-ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, int fd);
+ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, Tcl_Channel fd);
 ST_FUNC int pe_output_file(TCCState * s1, const char *filename);
 ST_FUNC int pe_putimport(TCCState *s1, int dllindex, const char *name, addr_t value);
 ST_FUNC SValue *pe_getimport(SValue *sv, SValue *v2);
diff -uNr tcc-0.9.26.orig/tcccoff.c tcc-0.9.26-1tclio/tcccoff.c
--- tcc-0.9.26.orig/tcccoff.c	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/tcccoff.c	2014-05-01 20:02:37.695836363 -0500
@@ -858,10 +858,11 @@
     return 0;
 }
 
-ST_FUNC int tcc_load_coff(TCCState * s1, int fd)
+ST_FUNC int tcc_load_coff(TCCState * s1, Tcl_Channel fd)
 {
 // tktk TokenSym *ts;
 
+    int native_fd;
     FILE *f;
     unsigned int str_size;
     char *Coff_str_table, *name;
@@ -869,8 +870,14 @@
     struct syment csym;
     char name2[9];
     FILHDR file_hdr;		/* FILE HEADER STRUCTURE              */
+    int tcl_ret;
 
-    f = fdopen(fd, "rb");
+    tcl_ret = Tcl_GetChannelHandle(fd, TCL_READABLE, &native_fd);
+    if (tcl_ret != TCL_OK) {
+	tcc_error("Unable to open .out file for input");
+    }
+
+    f = fdopen(native_fd, "rb");
     if (!f) {
 	tcc_error("Unable to open .out file for input");
     }
diff -uNr tcc-0.9.26.orig/tccelf.c tcc-0.9.26-1tclio/tccelf.c
--- tcc-0.9.26.orig/tccelf.c	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/tccelf.c	2014-05-01 20:14:26.278515126 -0500
@@ -2334,13 +2334,13 @@
     return ret;
 }
 
-static void *load_data(int fd, unsigned long file_offset, unsigned long size)
+static void *load_data(Tcl_Channel fd, unsigned long file_offset, unsigned long size)
 {
     void *data;
 
     data = tcc_malloc(size);
-    lseek(fd, file_offset, SEEK_SET);
-    read(fd, data, size);
+    Tcl_Seek(fd, file_offset, SEEK_SET);
+    Tcl_Read(fd, data, size);
     return data;
 }
 
@@ -2354,7 +2354,7 @@
 /* load an object file and merge it with current files */
 /* XXX: handle correctly stab (debug) info */
 ST_FUNC int tcc_load_object_file(TCCState *s1, 
-                                int fd, unsigned long file_offset)
+                                Tcl_Channel fd, unsigned long file_offset)
 { 
     ElfW(Ehdr) ehdr;
     ElfW(Shdr) *shdr, *sh;
@@ -2372,7 +2372,7 @@
 
     stab_index = stabstr_index = 0;
 
-    if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr))
+    if (Tcl_Read(fd, (char *) &ehdr, sizeof(ehdr)) != sizeof(ehdr))
         goto fail1;
     if (ehdr.e_ident[0] != ELFMAG0 ||
         ehdr.e_ident[1] != ELFMAG1 ||
@@ -2499,9 +2499,9 @@
         size = sh->sh_size;
         if (sh->sh_type != SHT_NOBITS) {
             unsigned char *ptr;
-            lseek(fd, file_offset + sh->sh_offset, SEEK_SET);
+            Tcl_Seek(fd, file_offset + sh->sh_offset, SEEK_SET);
             ptr = section_ptr_add(s, size);
-            read(fd, ptr, size);
+            Tcl_Read(fd, ptr, size);
         } else {
             s->data_offset += size;
         }
@@ -2657,7 +2657,7 @@
 }
 
 /* load only the objects which resolve undefined symbols */
-static int tcc_load_alacarte(TCCState *s1, int fd, int size)
+static int tcc_load_alacarte(TCCState *s1, Tcl_Channel fd, int size)
 {
     int i, bound, nsyms, sym_index, off, ret;
     uint8_t *data;
@@ -2666,7 +2666,7 @@
     ElfW(Sym) *sym;
 
     data = tcc_malloc(size);
-    if (read(fd, data, size) != size)
+    if (Tcl_Read(fd, data, size) != size)
         goto fail;
     nsyms = get_be32(data);
     ar_index = data + 4;
@@ -2684,7 +2684,7 @@
                     printf("%5d\t%s\t%08x\n", i, p, sym->st_shndx);
 #endif
                     ++bound;
-                    lseek(fd, off, SEEK_SET);
+                    Tcl_Seek(fd, off, SEEK_SET);
                     if(tcc_load_object_file(s1, fd, off) < 0) {
                     fail:
                         ret = -1;
@@ -2701,7 +2701,7 @@
 }
 
 /* load a '.a' file */
-ST_FUNC int tcc_load_archive(TCCState *s1, int fd)
+ST_FUNC int tcc_load_archive(TCCState *s1, Tcl_Channel fd)
 {
     ArchiveHeader hdr;
     char ar_size[11];
@@ -2711,10 +2711,10 @@
     unsigned long file_offset;
 
     /* skip magic which was already checked */
-    read(fd, magic, sizeof(magic));
+    Tcl_Read(fd, magic, sizeof(magic));
     
     for(;;) {
-        len = read(fd, &hdr, sizeof(hdr));
+        len = Tcl_Read(fd, (char *) &hdr, sizeof(hdr));
         if (len == 0)
             break;
         if (len != sizeof(hdr)) {
@@ -2731,7 +2731,7 @@
         }
         ar_name[i + 1] = '\0';
         //        printf("name='%s' size=%d %s\n", ar_name, size, ar_size);
-        file_offset = lseek(fd, 0, SEEK_CUR);
+        file_offset = Tcl_Seek(fd, 0, SEEK_CUR);
         /* align to even */
         size = (size + 1) & ~1;
         if (!strcmp(ar_name, "/")) {
@@ -2747,7 +2747,7 @@
             if (tcc_load_object_file(s1, fd, file_offset) < 0)
                 return -1;
         }
-        lseek(fd, file_offset + size, SEEK_SET);
+        Tcl_Seek(fd, file_offset + size, SEEK_SET);
     }
     return 0;
 }
@@ -2756,7 +2756,7 @@
 /* load a DLL and all referenced DLLs. 'level = 0' means that the DLL
    is referenced by the user (so it should be added as DT_NEEDED in
    the generated ELF file) */
-ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
+ST_FUNC int tcc_load_dll(TCCState *s1, Tcl_Channel fd, const char *filename, int level)
 { 
     ElfW(Ehdr) ehdr;
     ElfW(Shdr) *shdr, *sh, *sh1;
@@ -2767,7 +2767,7 @@
     const char *name, *soname;
     DLLReference *dllref;
     
-    read(fd, &ehdr, sizeof(ehdr));
+    Tcl_Read(fd, (char *) &ehdr, sizeof(ehdr));
 
     /* test CPU specific stuff */
     if (ehdr.e_ident[5] != ELFDATA2LSB ||
diff -uNr tcc-0.9.26.orig/tccpe.c tcc-0.9.26-1tclio/tccpe.c
--- tcc-0.9.26.orig/tccpe.c	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/tccpe.c	2014-05-01 20:09:11.572909155 -0500
@@ -1505,10 +1505,10 @@
 
 /* ------------------------------------------------------------- */
 
-static int read_mem(int fd, unsigned offset, void *buffer, unsigned len)
+static int read_mem(Tcl_Channel fd, unsigned offset, void *buffer, unsigned len)
 {
-    lseek(fd, offset, SEEK_SET);
-    return len == read(fd, buffer, len);
+    Tcl_Seek(fd, offset, SEEK_SET);
+    return len == Tcl_Read(fd, buffer, len);
 }
 
 /* -------------------------------------------------------------
@@ -1516,7 +1516,7 @@
  *  as generated by 'windres.exe -O coff ...'.
  */
 
-static int pe_load_res(TCCState *s1, int fd)
+static int pe_load_res(TCCState *s1, Tcl_Channel fd)
 {
     struct pe_rsrc_header hdr;
     Section *rsrc_section;
@@ -1571,11 +1571,11 @@
     return a;
 }
 
-static char *get_line(char *line, int size, int fd)
+static char *get_line(char *line, int size, Tcl_Channel fd)
 {
     int n;
     for (n = 0; n < size - 1; )
-        if (read(fd, line + n, 1) < 1 || line[n++] == '\n')
+        if (Tcl_Read(fd, line + n, 1) < 1 || line[n++] == '\n')
             break;
     if (0 == n)
         return NULL;
@@ -1584,7 +1584,7 @@
 }
 
 /* ------------------------------------------------------------- */
-static int pe_load_def(TCCState *s1, int fd)
+static int pe_load_def(TCCState *s1, Tcl_Channel fd)
 {
     int state = 0, ret = -1, dllindex = 0;
     char line[400], dllname[80], *p;
@@ -1627,7 +1627,7 @@
 #define TINY_IMPDEF_GET_EXPORT_NAMES_ONLY
 #include "win32/tools/tiny_impdef.c"
 
-static int pe_load_dll(TCCState *s1, const char *dllname, int fd)
+static int pe_load_dll(TCCState *s1, const char *dllname, Tcl_Channel fd)
 {
     char *p, *q;
     int index;
@@ -1642,7 +1642,7 @@
 }
 
 /* ------------------------------------------------------------- */
-ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, int fd)
+ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, Tcl_Channel fd)
 {
     int ret = -1;
     char buf[10];
diff -uNr tcc-0.9.26.orig/tccpp.c tcc-0.9.26-1tclio/tccpp.c
--- tcc-0.9.26.orig/tccpp.c	2013-02-15 08:24:00.000000000 -0600
+++ tcc-0.9.26-1tclio/tccpp.c	2014-05-01 20:12:26.967021662 -0500
@@ -360,13 +360,13 @@
     int len;
     /* only tries to read if really end of buffer */
     if (bf->buf_ptr >= bf->buf_end) {
-        if (bf->fd != -1) {
+        if (bf->fd != NULL) {
 #if defined(PARSE_DEBUG)
             len = 8;
 #else
             len = IO_BUF_SIZE;
 #endif
-            len = read(bf->fd, bf->buffer, len);
+            len = Tcl_Read(bf->fd, bf->buffer, len);
             if (len < 0)
                 len = 0;
         } else {