diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index cb67a48e4a..cd6eb8124a 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -4378,82 +4378,6 @@ RELEASE_GCC44_IA32_CC_FLAGS       = DEF(GCC44_IA32_CC_FLAGS) -Os
 RELEASE_GCC44_X64_CC_FLAGS       = DEF(GCC44_X64_CC_FLAGS) -Os
   NOOPT_GCC44_X64_CC_FLAGS       = DEF(GCC44_X64_CC_FLAGS) -O0
 
-####################################################################################
-#
-# GCC 4.5 - This configuration is used to compile under Linux to produce
-#           PE/COFF binaries using GCC 4.5.
-#
-####################################################################################
-*_GCC45_*_*_FAMILY               = GCC
-
-*_GCC45_*_MAKE_PATH                    = DEF(GCC_HOST_PREFIX)make
-*_GCC45_*_*_DLL                        = ENV(GCC45_DLL)
-*_GCC45_*_ASL_PATH                     = DEF(UNIX_IASL_BIN)
-
-*_GCC45_*_PP_FLAGS                     = DEF(GCC_PP_FLAGS)
-*_GCC45_*_ASLPP_FLAGS                  = DEF(GCC_ASLPP_FLAGS)
-*_GCC45_*_ASLCC_FLAGS                  = DEF(GCC_ASLCC_FLAGS)
-*_GCC45_*_VFRPP_FLAGS                  = DEF(GCC_VFRPP_FLAGS)
-*_GCC45_*_APP_FLAGS                    =
-*_GCC45_*_ASL_FLAGS                    = DEF(IASL_FLAGS)
-*_GCC45_*_ASL_OUTFLAGS                 = DEF(IASL_OUTFLAGS)
-
-##################
-# GCC45 IA32 definitions
-##################
-*_GCC45_IA32_OBJCOPY_PATH         = DEF(GCC45_IA32_PREFIX)objcopy
-*_GCC45_IA32_CC_PATH              = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_SLINK_PATH           = DEF(GCC45_IA32_PREFIX)ar
-*_GCC45_IA32_DLINK_PATH           = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_ASLDLINK_PATH        = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_ASM_PATH             = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_PP_PATH              = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_VFRPP_PATH           = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_ASLCC_PATH           = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_ASLPP_PATH           = DEF(GCC45_IA32_PREFIX)gcc
-*_GCC45_IA32_RC_PATH              = DEF(GCC45_IA32_PREFIX)objcopy
-
-*_GCC45_IA32_ASLCC_FLAGS          = DEF(GCC_ASLCC_FLAGS) -m32
-*_GCC45_IA32_ASLDLINK_FLAGS       = DEF(GCC45_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_i386
-*_GCC45_IA32_ASM_FLAGS            = DEF(GCC45_ASM_FLAGS) -m32 --32 -march=i386
-*_GCC45_IA32_DLINK_FLAGS          = DEF(GCC45_IA32_X64_DLINK_FLAGS) -Wl,-m,elf_i386,--oformat=elf32-i386
-*_GCC45_IA32_DLINK2_FLAGS         = DEF(GCC45_IA32_DLINK2_FLAGS)
-*_GCC45_IA32_RC_FLAGS             = DEF(GCC_IA32_RC_FLAGS)
-*_GCC45_IA32_OBJCOPY_FLAGS        =
-*_GCC45_IA32_NASM_FLAGS           = -f elf32
-
-  DEBUG_GCC45_IA32_CC_FLAGS       = DEF(GCC45_IA32_CC_FLAGS) -Os
-RELEASE_GCC45_IA32_CC_FLAGS       = DEF(GCC45_IA32_CC_FLAGS) -Os
-  NOOPT_GCC45_IA32_CC_FLAGS       = DEF(GCC45_IA32_CC_FLAGS) -O0
-
-##################
-# GCC45 X64 definitions
-##################
-*_GCC45_X64_OBJCOPY_PATH         = DEF(GCC45_X64_PREFIX)objcopy
-*_GCC45_X64_CC_PATH              = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_SLINK_PATH           = DEF(GCC45_X64_PREFIX)ar
-*_GCC45_X64_DLINK_PATH           = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_ASLDLINK_PATH        = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_ASM_PATH             = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_PP_PATH              = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_VFRPP_PATH           = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_ASLCC_PATH           = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_ASLPP_PATH           = DEF(GCC45_X64_PREFIX)gcc
-*_GCC45_X64_RC_PATH              = DEF(GCC45_X64_PREFIX)objcopy
-
-*_GCC45_X64_ASLCC_FLAGS          = DEF(GCC_ASLCC_FLAGS) -m64
-*_GCC45_X64_ASLDLINK_FLAGS       = DEF(GCC45_IA32_X64_ASLDLINK_FLAGS) -Wl,-m,elf_x86_64
-*_GCC45_X64_ASM_FLAGS            = DEF(GCC45_ASM_FLAGS) -m64 --64 -melf_x86_64
-*_GCC45_X64_DLINK_FLAGS          = DEF(GCC45_X64_DLINK_FLAGS)
-*_GCC45_X64_DLINK2_FLAGS         = DEF(GCC45_X64_DLINK2_FLAGS)
-*_GCC45_X64_RC_FLAGS             = DEF(GCC_X64_RC_FLAGS)
-*_GCC45_X64_OBJCOPY_FLAGS        =
-*_GCC45_X64_NASM_FLAGS           = -f elf64
-
-  DEBUG_GCC45_X64_CC_FLAGS       = DEF(GCC45_X64_CC_FLAGS) -Os
-RELEASE_GCC45_X64_CC_FLAGS       = DEF(GCC45_X64_CC_FLAGS) -Os
-  NOOPT_GCC45_X64_CC_FLAGS       = DEF(GCC45_X64_CC_FLAGS) -O0
-
 ####################################################################################
 #
 # GCC 4.8 - This configuration is used to compile under Linux to produce