Patch by Sergei Golovan "fixes" building Tcl 8.5.8 for MIPS architectures
until a proper solution isn't suggested.

--- tcl8.5-8.5.8.orig/generic/tclStrToD.c
+++ tcl8.5-8.5.8/generic/tclStrToD.c
@@ -73,7 +73,7 @@
  * MIPS floating-point units need special settings in control registers
  * to use gradual underflow as we expect.
  */
-#if defined(__mips)
+#if 0 && defined(__mips)
 #include <sys/fpu.h>
 #endif
 /*
@@ -2166,7 +2166,7 @@
     } bitwhack;
 #endif
 
-#if defined(__mips)
+#if 0 && defined(__mips)
     union fpc_csr mipsCR;
 
     mipsCR.fc_word = get_fpc_csr();