diff --git a/tools/sdk/ld/Makefile b/tools/sdk/ld/Makefile
new file mode 100644
index 000000000..44225371f
--- /dev/null
+++ b/tools/sdk/ld/Makefile
@@ -0,0 +1,17 @@
+
+CPP = ../../../tools/xtensa-lx106-elf/bin/xtensa-lx106-elf-cpp
+COMMON = eagle.app.v6.common.ld
+WARN = "\/\* warning: AUTOGENERATED from $(COMMON)\*.h \*\/"
+
+all:
+	@echo "available rules:"
+	@echo "  iram: move c++ vtables to iram (= default in git master repository)"
+	@echo "  heap: move c++ vtables to heap"
+
+heap:
+	@(echo "$(WARN)"; $(CPP) -CC -E -DVTABLES_IN_DRAM $(COMMON).h | grep -v '^#') > $(COMMON)
+	@echo "c++ vtables moved to heap"
+
+iram:
+	@(echo "$(WARN)"; $(CPP) -CC -E -DVTABLES_IN_IRAM $(COMMON).h | grep -v '^#') > $(COMMON)
+	@echo "c++ vtables moved to iram"
diff --git a/tools/sdk/ld/eagle.app.v6.common.ld b/tools/sdk/ld/eagle.app.v6.common.ld
index cbc1ebf87..0fb87f411 100644
--- a/tools/sdk/ld/eagle.app.v6.common.ld
+++ b/tools/sdk/ld/eagle.app.v6.common.ld
@@ -1,3 +1,4 @@
+/* warning: AUTOGENERATED from eagle.app.v6.common.ld*.h */
 /* This linker script generated from xt-genldscripts.tpp for LSP . */
 /* Linker Script for ld -N */
 
@@ -84,12 +85,15 @@ SECTIONS
     _data_end = ABSOLUTE(.);
   } >dram0_0_seg :dram0_0_phdr
 
+
+
+
+
   .irom0.text : ALIGN(4)
   {
     _irom0_text_start = ABSOLUTE(.);
     *(.ver_number)
-    *.c.o( EXCLUDE_FILE (umm_malloc.c.o) .literal*, \
-           EXCLUDE_FILE (umm_malloc.c.o) .text*)
+    *.c.o( EXCLUDE_FILE (umm_malloc.c.o) .literal*, EXCLUDE_FILE (umm_malloc.c.o) .text* )
     *.cpp.o(.literal*, .text*)
     *libc.a:(.literal .text .literal.* .text.*)
     *libm.a:(.literal .text .literal.* .text.*)
@@ -154,7 +158,9 @@ SECTIONS
     *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
     *.cpp.o(.iram.text)
     *.c.o(.iram.text)
+
     *(.rodata._ZTV*) /* C++ vtables */
+
     *(.fini.literal)
     *(.fini)
     *(.gnu.version)
@@ -162,6 +168,7 @@ SECTIONS
     _etext = .;
   } >iram1_0_seg :iram1_0_phdr
 
+
   .rodata : ALIGN(4)
   {
     _rodata_start = ABSOLUTE(.);
@@ -196,7 +203,7 @@ SECTIONS
     *(.xt_except_desc_end)
     *(.dynamic)
     *(.gnu.version_d)
-    . = ALIGN(4);       /* this table MUST be 4-byte aligned */
+    . = ALIGN(4); /* this table MUST be 4-byte aligned */
     _bss_table_start = ABSOLUTE(.);
     LONG(_bss_start)
     LONG(_bss_end)
@@ -228,6 +235,7 @@ SECTIONS
   } >dram0_0_seg :dram0_0_bss_phdr
 /* __stack = 0x3ffc8000; */
 
+
   .lit4 : ALIGN(4)
   {
     _lit4_start = ABSOLUTE(.);
diff --git a/tools/sdk/ld/eagle.app.v6.common.ld.h b/tools/sdk/ld/eagle.app.v6.common.ld.h
new file mode 100644
index 000000000..bbc200423
--- /dev/null
+++ b/tools/sdk/ld/eagle.app.v6.common.ld.h
@@ -0,0 +1,187 @@
+/* This linker script generated from xt-genldscripts.tpp for LSP . */
+/* Linker Script for ld -N */
+
+PHDRS
+{
+  dport0_0_phdr PT_LOAD;
+  dram0_0_phdr PT_LOAD;
+  dram0_0_bss_phdr PT_LOAD;
+  iram1_0_phdr PT_LOAD;
+  irom0_0_phdr PT_LOAD;
+}
+
+
+/*  Default entry point:  */
+ENTRY(call_user_start)
+EXTERN(_DebugExceptionVector)
+EXTERN(_DoubleExceptionVector)
+EXTERN(_KernelExceptionVector)
+EXTERN(_NMIExceptionVector)
+EXTERN(_UserExceptionVector)
+EXTERN(core_version)
+PROVIDE(_memmap_vecbase_reset = 0x40000000);
+/* Various memory-map dependent cache attribute settings: */
+_memmap_cacheattr_wb_base = 0x00000110;
+_memmap_cacheattr_wt_base = 0x00000110;
+_memmap_cacheattr_bp_base = 0x00000220;
+_memmap_cacheattr_unused_mask = 0xFFFFF00F;
+_memmap_cacheattr_wb_trapnull = 0x2222211F;
+_memmap_cacheattr_wba_trapnull = 0x2222211F;
+_memmap_cacheattr_wbna_trapnull = 0x2222211F;
+_memmap_cacheattr_wt_trapnull = 0x2222211F;
+_memmap_cacheattr_bp_trapnull = 0x2222222F;
+_memmap_cacheattr_wb_strict = 0xFFFFF11F;
+_memmap_cacheattr_wt_strict = 0xFFFFF11F;
+_memmap_cacheattr_bp_strict = 0xFFFFF22F;
+_memmap_cacheattr_wb_allvalid = 0x22222112;
+_memmap_cacheattr_wt_allvalid = 0x22222112;
+_memmap_cacheattr_bp_allvalid = 0x22222222;
+PROVIDE(_memmap_cacheattr_reset = _memmap_cacheattr_wb_trapnull);
+
+SECTIONS
+{
+
+  .dport0.rodata : ALIGN(4)
+  {
+    _dport0_rodata_start = ABSOLUTE(.);
+    *(.dport0.rodata)
+    *(.dport.rodata)
+    _dport0_rodata_end = ABSOLUTE(.);
+  } >dport0_0_seg :dport0_0_phdr
+
+  .dport0.literal : ALIGN(4)
+  {
+    _dport0_literal_start = ABSOLUTE(.);
+    *(.dport0.literal)
+    *(.dport.literal)
+    _dport0_literal_end = ABSOLUTE(.);
+  } >dport0_0_seg :dport0_0_phdr
+
+  .dport0.data : ALIGN(4)
+  {
+    _dport0_data_start = ABSOLUTE(.);
+    *(.dport0.data)
+    *(.dport.data)
+    _dport0_data_end = ABSOLUTE(.);
+  } >dport0_0_seg :dport0_0_phdr
+
+  .data : ALIGN(4)
+  {
+    _data_start = ABSOLUTE(.);
+    *(.data)
+    *(.data.*)
+    *(.gnu.linkonce.d.*)
+    *(.data1)
+    *(.sdata)
+    *(.sdata.*)
+    *(.gnu.linkonce.s.*)
+    *(.sdata2)
+    *(.sdata2.*)
+    *(.gnu.linkonce.s2.*)
+    *(.jcr)
+    . = ALIGN(4);
+    _Pri_3_HandlerAddress = ABSOLUTE(.);
+    _data_end = ABSOLUTE(.);
+  } >dram0_0_seg :dram0_0_phdr
+  
+#ifdef VTABLES_IN_DRAM
+#include "eagle.app.v6.common.ld.vtables.h"
+#endif
+
+  .irom0.text : ALIGN(4)
+  {
+    _irom0_text_start = ABSOLUTE(.);
+    *(.ver_number)
+    *.c.o( EXCLUDE_FILE (umm_malloc.c.o) .literal*, EXCLUDE_FILE (umm_malloc.c.o) .text* )
+    *.cpp.o(.literal*, .text*)
+    *libc.a:(.literal .text .literal.* .text.*)
+    *libm.a:(.literal .text .literal.* .text.*)
+    *libgcc.a:_umoddi3.o(.literal .text)
+    *libgcc.a:_udivdi3.o(.literal .text)
+    *libsmartconfig.a:(.literal .text .literal.* .text.*)
+    *libstdc++.a:(.literal .text .literal.* .text.*)
+    *liblwip_gcc.a:(.literal .text .literal.* .text.*)
+    *liblwip_src.a:(.literal .text .literal.* .text.*)
+    *liblwip2.a:(.literal .text .literal.* .text.*)
+    *liblwip2_1460.a:(.literal .text .literal.* .text.*)
+    *libaxtls.a:(.literal .text .literal.* .text.*)
+    *libat.a:(.literal.* .text.*)
+    *libcrypto.a:(.literal.* .text.*)
+    *libespnow.a:(.literal.* .text.*)
+    *libjson.a:(.literal.* .text.*)
+    *liblwip.a:(.literal.* .text.*)
+    *libmesh.a:(.literal.* .text.*)
+    *libnet80211.a:(.literal.* .text.*)
+    *libsmartconfig.a:(.literal.* .text.*)
+    *libssl.a:(.literal.* .text.*)
+    *libupgrade.a:(.literal.* .text.*)
+    *libwpa.a:(.literal.* .text.*)
+    *libwpa2.a:(.literal.* .text.*)
+    *libwps.a:(.literal.* .text.*)
+    *(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text .irom.text.*)
+    _irom0_text_end = ABSOLUTE(.);
+    _flash_code_end = ABSOLUTE(.);
+  } >irom0_0_seg :irom0_0_phdr
+
+  .text : ALIGN(4)
+  {
+    _stext = .;
+    _text_start = ABSOLUTE(.);
+     *(.UserEnter.text)
+    . = ALIGN(16);
+    *(.DebugExceptionVector.text)
+    . = ALIGN(16);
+    *(.NMIExceptionVector.text)
+    . = ALIGN(16);
+    *(.KernelExceptionVector.text)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    . = ALIGN(16);
+    *(.UserExceptionVector.text)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    . = ALIGN(16);
+    *(.DoubleExceptionVector.text)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    LONG(0)
+    . = ALIGN (16);
+    *(.entry.text)
+    *(.init.literal)
+    *(.init)
+    *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
+    *.cpp.o(.iram.text)
+    *.c.o(.iram.text)
+#ifdef VTABLES_IN_IRAM
+    *(.rodata._ZTV*) /* C++ vtables */
+#endif
+    *(.fini.literal)
+    *(.fini)
+    *(.gnu.version)
+    _text_end = ABSOLUTE(.);
+    _etext = .;
+  } >iram1_0_seg :iram1_0_phdr
+
+#ifdef VTABLES_IN_IRAM
+#include "eagle.app.v6.common.ld.vtables.h"
+#endif
+
+  .lit4 : ALIGN(4)
+  {
+    _lit4_start = ABSOLUTE(.);
+    *(*.lit4)
+    *(.lit4.*)
+    *(.gnu.linkonce.lit4.*)
+    _lit4_end = ABSOLUTE(.);
+  } >iram1_0_seg :iram1_0_phdr
+
+
+}
+
+/* get ROM code address */
+INCLUDE "../ld/eagle.rom.addr.v6.ld"
diff --git a/tools/sdk/ld/eagle.app.v6.common.ld.vtables.h b/tools/sdk/ld/eagle.app.v6.common.ld.vtables.h
new file mode 100644
index 000000000..6649e08a2
--- /dev/null
+++ b/tools/sdk/ld/eagle.app.v6.common.ld.vtables.h
@@ -0,0 +1,65 @@
+  .rodata : ALIGN(4)
+  {
+    _rodata_start = ABSOLUTE(.);
+    *(.sdk.version)
+    *(.rodata)
+    *(.rodata.*)
+    *(.gnu.linkonce.r.*)
+    *(.rodata1)
+    __XT_EXCEPTION_TABLE__ = ABSOLUTE(.);
+    *(.xt_except_table)
+    *(.gcc_except_table)
+    *(.gnu.linkonce.e.*)
+    *(.gnu.version_r)
+    *(.eh_frame)
+    . = (. + 3) & ~ 3;
+    /*  C++ constructor and destructor tables, properly ordered:  */
+    __init_array_start = ABSOLUTE(.);
+    KEEP (*crtbegin.o(.ctors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+    __init_array_end = ABSOLUTE(.);
+    KEEP (*crtbegin.o(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+    /*  C++ exception handlers table:  */
+    __XT_EXCEPTION_DESCS__ = ABSOLUTE(.);
+    *(.xt_except_desc)
+    *(.gnu.linkonce.h.*)
+    __XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
+    *(.xt_except_desc_end)
+    *(.dynamic)
+    *(.gnu.version_d)
+    . = ALIGN(4);       /* this table MUST be 4-byte aligned */
+    _bss_table_start = ABSOLUTE(.);
+    LONG(_bss_start)
+    LONG(_bss_end)
+    _bss_table_end = ABSOLUTE(.);
+    _rodata_end = ABSOLUTE(.);
+  } >dram0_0_seg :dram0_0_phdr
+
+  .bss ALIGN(8) (NOLOAD) : ALIGN(4)
+  {
+    . = ALIGN (8);
+    _bss_start = ABSOLUTE(.);
+    *(.dynsbss)
+    *(.sbss)
+    *(.sbss.*)
+    *(.gnu.linkonce.sb.*)
+    *(.scommon)
+    *(.sbss2)
+    *(.sbss2.*)
+    *(.gnu.linkonce.sb2.*)
+    *(.dynbss)
+    *(.bss)
+    *(.bss.*)
+    *(.gnu.linkonce.b.*)
+    *(COMMON)
+    . = ALIGN (8);
+    _bss_end = ABSOLUTE(.);
+    _heap_start = ABSOLUTE(.);
+/*    _stack_sentry = ALIGN(0x8); */
+  } >dram0_0_seg :dram0_0_bss_phdr
+/* __stack = 0x3ffc8000; */