diff --git a/arch/arm/src/cmake/elf.cmake b/arch/arm/src/cmake/elf.cmake
index e2d8e58a4ca..67223df2511 100644
--- a/arch/arm/src/cmake/elf.cmake
+++ b/arch/arm/src/cmake/elf.cmake
@@ -33,3 +33,5 @@ nuttx_elf_link_options_ifdef(
 nuttx_elf_link_options_ifdef(CONFIG_BINFMT_ELF_RELOCATABLE -r)
 
 nuttx_elf_link_options_ifdef(CONFIG_BUILD_KERNEL -Bstatic)
+
+nuttx_elf_link_options_ifdef(CONFIG_DEBUG_OPT_UNUSED_SECTIONS --gc-sections)
diff --git a/arch/arm64/src/cmake/elf.cmake b/arch/arm64/src/cmake/elf.cmake
index 5b879c256aa..1e8dfb4218a 100644
--- a/arch/arm64/src/cmake/elf.cmake
+++ b/arch/arm64/src/cmake/elf.cmake
@@ -25,3 +25,5 @@ nuttx_elf_compile_options(-fvisibility=hidden)
 nuttx_elf_link_options_ifdef(CONFIG_BINFMT_ELF_RELOCATABLE -r)
 
 nuttx_elf_link_options_ifdef(CONFIG_BUILD_KERNEL -Bstatic)
+
+nuttx_elf_link_options_ifdef(CONFIG_DEBUG_OPT_UNUSED_SECTIONS --gc-sections)