diff --git a/lib/ext/cryptocell-312-runtime/codesafe/src/mbedtls_api/cc_ecp_internal.c b/lib/ext/cryptocell-312-runtime/codesafe/src/mbedtls_api/cc_ecp_internal.c
index 8c05aacbf..e61a53694 100644
--- a/lib/ext/cryptocell-312-runtime/codesafe/src/mbedtls_api/cc_ecp_internal.c
+++ b/lib/ext/cryptocell-312-runtime/codesafe/src/mbedtls_api/cc_ecp_internal.c
@@ -72,6 +72,7 @@
 #define mbedtls_free       free
 #endif
 
+#if defined(ECP_MONTGOMERY)
 static int ecc_conv_scalar_to_mpi( uint8_t * scalar, size_t scalarSize, mbedtls_mpi * X)
 {
     CCError_t status;
@@ -139,7 +140,6 @@ static int ecc_conv_mpi_to_scalar( const mbedtls_mpi * X, uint8_t *scalar, size_
     return 0;
 }
 
-#if defined(ECP_MONTGOMERY)
 static int ecp_mont_mul( mbedtls_ecp_point *R,
              const mbedtls_mpi *m, const mbedtls_ecp_point *P )
 {
diff --git a/platform/ext/common/boot_hal_bl2.c b/platform/ext/common/boot_hal_bl2.c
index 6c36414e6..4463e0aa4 100644
--- a/platform/ext/common/boot_hal_bl2.c
+++ b/platform/ext/common/boot_hal_bl2.c
@@ -237,6 +237,7 @@ __WEAK void boot_platform_start_next_image(struct boot_arm_vector_table *vt)
 __WEAK __NO_RETURN void boot_platform_error_state(uint32_t error)
 {
     FIH_PANIC;
+    __builtin_unreachable();
 }
 
 __WEAK int boot_platform_pre_load(uint32_t image_id)
diff --git a/platform/ext/target/arm/drivers/cc3xx/low_level_driver/src/cc3xx_init.c b/platform/ext/target/arm/drivers/cc3xx/low_level_driver/src/cc3xx_init.c
index 97f9f22cf..dcaf02452 100644
--- a/platform/ext/target/arm/drivers/cc3xx/low_level_driver/src/cc3xx_init.c
+++ b/platform/ext/target/arm/drivers/cc3xx/low_level_driver/src/cc3xx_init.c
@@ -91,6 +91,7 @@ static cc3xx_err_t setup_dfa_countermeasures(void)
      * to be switched off.
      */
     {
+    (void)lock_dfa_enabled;
 #endif /* CC3XX_CONFIG_AES_TUNNELLING_ENABLE */
         P_CC3XX->ao.host_ao_lock_bits &= ~(0b1U << 7); /* Unset HOST_FORCE_DFA_ENABLE */
     }
diff --git a/platform/ns/toolchain_ns_GNUARM.cmake b/platform/ns/toolchain_ns_GNUARM.cmake
index ae7232152..41782d967 100644
--- a/platform/ns/toolchain_ns_GNUARM.cmake
+++ b/platform/ns/toolchain_ns_GNUARM.cmake
@@ -181,6 +181,7 @@ add_compile_options(
     -specs=nosys.specs
     -Wall
     -Wno-format
+    -Wno-array-parameter
     -Wno-return-type
     -Wno-unused-but-set-variable
     -c
diff --git a/toolchain_GNUARM.cmake b/toolchain_GNUARM.cmake
index badf25aa0..4be140048 100644
--- a/toolchain_GNUARM.cmake
+++ b/toolchain_GNUARM.cmake
@@ -111,6 +111,7 @@ add_compile_options(
     -specs=nosys.specs
     -Wall
     -Wno-format
+    -Wno-array-parameter
     -Wno-return-type
     -Wno-unused-but-set-variable
     -c