diff --git a/tools/cmake/toolchain-esp32.cmake b/tools/cmake/toolchain-esp32.cmake
index fcc19cd54b..31bb748dc9 100644
--- a/tools/cmake/toolchain-esp32.cmake
+++ b/tools/cmake/toolchain-esp32.cmake
@@ -7,10 +7,15 @@ set(CMAKE_CXX_COMPILER xtensa-esp32-elf-g++)
 set(CMAKE_ASM_COMPILER xtensa-esp32-elf-gcc)
 set(_CMAKE_TOOLCHAIN_PREFIX xtensa-esp32-elf-)
 
-
-remove_duplicated_flags("-mlongcalls -Wno-frame-address ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
+remove_duplicated_flags("-mlongcalls -Wno-frame-address \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
 set(CMAKE_C_FLAGS "${UNIQ_CMAKE_C_FLAGS}" CACHE STRING "C Compiler Base Flags" FORCE)
-remove_duplicated_flags("-mlongcalls -Wno-frame-address ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
+remove_duplicated_flags("-mlongcalls -Wno-frame-address \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
 set(CMAKE_CXX_FLAGS "${UNIQ_CMAKE_CXX_FLAGS}" CACHE STRING "C++ Compiler Base Flags" FORCE)
 remove_duplicated_flags("-mlongcalls ${CMAKE_ASM_FLAGS}" UNIQ_CMAKE_ASM_FLAGS)
 set(CMAKE_ASM_FLAGS "${UNIQ_CMAKE_ASM_FLAGS}" CACHE STRING "ASM Compiler Base Flags" FORCE)
diff --git a/tools/cmake/toolchain-esp32s2.cmake b/tools/cmake/toolchain-esp32s2.cmake
index 8b5ebf7883..358b2e4100 100644
--- a/tools/cmake/toolchain-esp32s2.cmake
+++ b/tools/cmake/toolchain-esp32s2.cmake
@@ -7,9 +7,15 @@ set(CMAKE_CXX_COMPILER xtensa-esp32s2-elf-g++)
 set(CMAKE_ASM_COMPILER xtensa-esp32s2-elf-gcc)
 set(_CMAKE_TOOLCHAIN_PREFIX xtensa-esp32s2-elf-)
 
-remove_duplicated_flags("-mlongcalls ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
+remove_duplicated_flags("-mlongcalls \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
 set(CMAKE_C_FLAGS "${UNIQ_CMAKE_C_FLAGS}" CACHE STRING "C Compiler Base Flags" FORCE)
-remove_duplicated_flags("-mlongcalls ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
+remove_duplicated_flags("-mlongcalls \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
 set(CMAKE_CXX_FLAGS "${UNIQ_CMAKE_CXX_FLAGS}" CACHE STRING "C++ Compiler Base Flags" FORCE)
 remove_duplicated_flags("-mlongcalls ${CMAKE_ASM_FLAGS}" UNIQ_CMAKE_ASM_FLAGS)
 set(CMAKE_ASM_FLAGS "${UNIQ_CMAKE_ASM_FLAGS}" CACHE STRING "ASM Compiler Base Flags" FORCE)
diff --git a/tools/cmake/toolchain-esp32s3.cmake b/tools/cmake/toolchain-esp32s3.cmake
index a830c624ec..e504150e5d 100644
--- a/tools/cmake/toolchain-esp32s3.cmake
+++ b/tools/cmake/toolchain-esp32s3.cmake
@@ -7,9 +7,15 @@ set(CMAKE_CXX_COMPILER xtensa-esp32s3-elf-g++)
 set(CMAKE_ASM_COMPILER xtensa-esp32s3-elf-gcc)
 set(_CMAKE_TOOLCHAIN_PREFIX xtensa-esp32s3-elf-)
 
-remove_duplicated_flags("-mlongcalls ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
+remove_duplicated_flags("-mlongcalls \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_C_FLAGS}" UNIQ_CMAKE_C_FLAGS)
 set(CMAKE_C_FLAGS "${UNIQ_CMAKE_C_FLAGS}" CACHE STRING "C Compiler Base Flags" FORCE)
-remove_duplicated_flags("-mlongcalls ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
+remove_duplicated_flags("-mlongcalls \
+                         -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero \
+                         -fno-builtin-stpcpy -fno-builtin-strncpy \
+                         ${CMAKE_CXX_FLAGS}" UNIQ_CMAKE_CXX_FLAGS)
 set(CMAKE_CXX_FLAGS "${UNIQ_CMAKE_CXX_FLAGS}" CACHE STRING "C++ Compiler Base Flags" FORCE)
 remove_duplicated_flags("-mlongcalls ${CMAKE_ASM_FLAGS}" UNIQ_CMAKE_ASM_FLAGS)
 set(CMAKE_ASM_FLAGS "${UNIQ_CMAKE_ASM_FLAGS}" CACHE STRING "ASM Compiler Base Flags" FORCE)