More cleanup and no -ffreestanding for esp32s3

Author: ckormanyos

ref_app/target.vcxproj

@@ -1151,6 +1151,10 @@
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt0.cpp" />
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt0_init_ram.cpp" />
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt1.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Appli\main.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt0.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt0_init_ram.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt1.cpp" />
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\main.cpp" />
   </ItemGroup>
   <ItemGroup>

ref_app/target.vcxproj.filters

@@ -992,9 +992,10 @@
     <ClCompile Include="target\micros\xtensa_esp32_s3\startup\Std\StdLib.cpp">
       <Filter>micros\xtensa_esp32_s3\startup\Std</Filter>
     </ClCompile>
-    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt0.cpp">
-      <Filter>micros\xtensa_esp32_s3_riscv_cop\startup</Filter>
-    </ClCompile>
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Appli\main.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt0.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt0_init_ram.cpp" />
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\from_no_sdk\Code\Startup\crt1.cpp" />
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt0_init_ram.cpp">
       <Filter>micros\xtensa_esp32_s3_riscv_cop\startup</Filter>
     </ClCompile>
@@ -1004,6 +1005,9 @@
     <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\main.cpp">
       <Filter>micros\xtensa_esp32_s3_riscv_cop\startup</Filter>
     </ClCompile>
+    <ClCompile Include="target\micros\xtensa_esp32_s3_riscv_cop\startup\crt0.cpp">
+      <Filter>micros\xtensa_esp32_s3_riscv_cop\startup</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <Text Include="target\micros\bcm2835_raspi_b\startup\SD_CARD\PiZero\config.txt">

ref_app/target/micros/xtensa_esp32_s3/make/xtensa_esp32_s3_flags.gmk

@@ -15,6 +15,7 @@ GCC_PREFIX    = xtensa-esp32s3-elf
 
 TGT_SUFFIX    = elf
 
+WARN_FLAGS   :=
 
 include $(PATH_TGT_MAKE)/$(TGT)_flags_extra.gmk
 
@@ -33,7 +34,6 @@ TGT_ALLFLAGS  = -O1
                 -fno-stack-protector                                              \
                 -nostdlib                                                         \
                 -gdwarf-4                                                         \
-                -ffreestanding                                                    \
                 -DCONFIG_IDF_TARGET_ESP32S3                                       \
                 -DI_KNOW_WHAT_I_AM_DOING
 
@@ -75,7 +75,7 @@ $(PATH_OBJ)/%.o : %.S
   # ...and reformat (using sed) any possible error/warning messages
   #    for the VisualStudio(R) output window,
   # ...and create an assembly listing using objdump
-	@-$(TGT_GCC) -O1 -fno-reorder-blocks-and-partition -fno-reorder-functions -mabi=call0 -mno-text-section-literals -mstrict-align -mlongcalls -fomit-frame-pointer -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -fno-stack-protector -DI_KNOW_WHAT_I_AM_DOING $(DEFS_IEEE754_SF) $(C_INCLUDES) $< -c -o $(PATH_OBJ)/$(basename $(@F)).o 2> $(PATH_ERR)/$(basename $(@F)).err
+	@-$(TGT_GCC) -O1 -fno-reorder-blocks-and-partition -fno-reorder-functions -mabi=call0 -mno-text-section-literals -mstrict-align -mlongcalls -fomit-frame-pointer -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -fno-stack-protector -DI_KNOW_WHAT_I_AM_DOING $(DEFS_IEEE754_SF) $(DEFS_LIB1FUNCS) $(C_INCLUDES) $< -c -o $(PATH_OBJ)/$(basename $(@F)).o 2> $(PATH_ERR)/$(basename $(@F)).err
 	@-$(SED) -e 's|:\([0-9]*\):|(\1) :|' $(PATH_ERR)/$(basename $(@F)).err
 	@-$(OBJDUMP) -S $(PATH_OBJ)/$(basename $(@F)).o > $(PATH_LST)/$(basename $(@F)).lst
 

ref_app/target/micros/xtensa_esp32_s3/make/xtensa_esp32_s3_flags_extra.gmk

@@ -67,10 +67,10 @@ SOME_O3_FLAGS   += -fgcse-after-reload
 SOME_O3_FLAGS   += -fipa-cp-clone
 
 DEFS_IEEE754_SF :=
+DEFS_IEEE754_SF += -D__XTENSA_CALL0_ABI__=1
 DEFS_IEEE754_SF += -DL_divsf3
 DEFS_IEEE754_SF += -DL_negsf2
 DEFS_IEEE754_SF += -DL_addsubsf3
-DEFS_IEEE754_SF += -DL_mulsf3
 DEFS_IEEE754_SF += -DL_cmpsf2
 DEFS_IEEE754_SF += -DL_fixsfsi
 DEFS_IEEE754_SF += -DL_fixsfdi
@@ -81,3 +81,21 @@ DEFS_IEEE754_SF += -DL_floatdisf
 DEFS_IEEE754_SF += -DL_sqrtf
 DEFS_IEEE754_SF += -DL_recipsf2
 DEFS_IEEE754_SF += -DL_rsqrtsf2
+
+DEFS_LIB1FUNCS  :=
+DEFS_LIB1FUNCS  += -DL_ctzsi2
+DEFS_LIB1FUNCS  += -DL_mulsi3
+DEFS_LIB1FUNCS  += -DL_umulsidi3
+DEFS_LIB1FUNCS  += -DL_clz
+DEFS_LIB1FUNCS  += -DL_clrsbsi2
+DEFS_LIB1FUNCS  += -DL_clzsi2
+DEFS_LIB1FUNCS  += -DL_ffssi2
+DEFS_LIB1FUNCS  += -DL_udivsi3
+DEFS_LIB1FUNCS  += -DL_divsi3
+DEFS_LIB1FUNCS  += -DL_umodsi3
+DEFS_LIB1FUNCS  += -DL_modsi3
+DEFS_LIB1FUNCS  += -DL_ashldi3
+DEFS_LIB1FUNCS  += -DL_ashrdi3
+DEFS_LIB1FUNCS  += -DL_lshrdi3
+DEFS_LIB1FUNCS  += -DL_bswapsi2
+DEFS_LIB1FUNCS  += -DL_bswapdi2

ref_app/target/micros/xtensa_esp32_s3/startup/Std/StdLib.cpp

@@ -5,7 +5,7 @@
 //  or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-// Originally from:
+// Originally from (but strongly modified from):
 /******************************************************************************************
   Filename    : StdLib.c
 
@@ -19,7 +19,7 @@
 
   Date        : 22.02.2025
 
-  Description : Handwritten StdLib functions
+  Description : Hand-written StdLib functions
 
 ******************************************************************************************/