--- a/js/src/old-configure.in
+++ b/js/src/old-configure.in
@@ -139,17 +139,17 @@ WINVER=601
 
 case "$target" in
 *-mingw*)
     if test "$GCC" != "yes"; then
         # Check to see if we are really running in a msvc environemnt
         _WIN32_MSVC=1
 
         # Make sure compilers are valid
-        CFLAGS="$CFLAGS -TC -nologo"
+        CFLAGS="$CFLAGS -nologo"
         CXXFLAGS="$CXXFLAGS -TP -nologo"
         if test -z "$CLANG_CL"; then
             CPPFLAGS="$CPPFLAGS -utf-8"
         fi
         # MSVC warning C4800 warns when a value is implicitly cast to bool,
         # because this also forces narrowing to a single byte, which can be a
         # perf hit.  But this matters so little in practice (and often we want
         # that behavior) that it's better to turn it off.
@@ -498,17 +498,17 @@ fi
 dnl ========================================================
 dnl System overrides of the defaults for host
 dnl ========================================================
 case "$host" in
 *mingw*)
     if test -n "$_WIN32_MSVC"; then
         HOST_AR=lib
         HOST_AR_FLAGS='-NOLOGO -OUT:$@'
-        HOST_CFLAGS="$HOST_CFLAGS -TC -nologo"
+        HOST_CFLAGS="$HOST_CFLAGS -nologo"
         HOST_RANLIB='echo ranlib'
     else
         HOST_CFLAGS="$HOST_CFLAGS -mwindows"
     fi
     HOST_CFLAGS="$HOST_CFLAGS -DXP_WIN32 -DXP_WIN -DWIN32 -D_WIN32 -D_CRT_SECURE_NO_WARNINGS"
     HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
     HOST_BIN_SUFFIX=.exe
 

--- a/old-configure.in
+++ b/old-configure.in
@@ -154,17 +154,17 @@ WINVER=601
 case "$target" in
 *-mingw*)
     if test "$GCC" != "yes"; then
         # Check to see if we are really running in a msvc environemnt
         _WIN32_MSVC=1
         AC_CHECK_PROGS(MIDL, midl)
 
         # Make sure compilers are valid
-        CFLAGS="$CFLAGS -TC -nologo"
+        CFLAGS="$CFLAGS -nologo"
         CXXFLAGS="$CXXFLAGS -TP -nologo"
         AC_LANG_SAVE
         AC_LANG_C
         AC_TRY_COMPILE([#include <stdio.h>],
             [ printf("Hello World\n"); ],,
             AC_MSG_ERROR([\$(CC) test failed.  You must have MS VC++ in your path to build.]) )
 
         AC_LANG_CPLUSPLUS
@@ -683,17 +683,17 @@ fi
 dnl ========================================================
 dnl System overrides of the defaults for host
 dnl ========================================================
 case "$host" in
 *mingw*)
     if test -n "$_WIN32_MSVC"; then
         HOST_AR=lib
         HOST_AR_FLAGS='-NOLOGO -OUT:$@'
-        HOST_CFLAGS="$HOST_CFLAGS -TC -nologo"
+        HOST_CFLAGS="$HOST_CFLAGS -nologo"
         HOST_RANLIB='echo ranlib'
     else
         HOST_CFLAGS="$HOST_CFLAGS -mwindows"
     fi
     HOST_CFLAGS="$HOST_CFLAGS -DXP_WIN32 -DXP_WIN -DWIN32 -D_WIN32 -D_CRT_SECURE_NO_WARNINGS"
     HOST_OPTIMIZE_FLAGS="${HOST_OPTIMIZE_FLAGS=-O2}"
     HOST_BIN_SUFFIX=.exe