CMake: Fix Mbed TLS compilation on Cortex-M0/0+/1

Due to a known issue in Mbed TLS's architecture determination (Mbed-TLS/mbedtls#1077), we get the error error: inline assembly requires more registers than available when compiling `bignum.c` for Cortex-M0/0+/1, The workaround is to define the macro `MULADDC_CANNOT_USE_R7` which is already defined by Mbed CLI 1 but missing in our CMake support. Fixes ARMmbed/mbed-os-example-lorawan#220
LDong-Arm · Apr 9, 2021 · 5f05845 · 5f05845
1 parent 35b8e55
commit 5f05845
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diff --git a/connectivity/mbedtls/CMakeLists.txt b/connectivity/mbedtls/CMakeLists.txt
@@ -101,4 +101,6 @@ target_sources(mbed-mbedtls
 target_compile_definitions(mbed-mbedtls
     INTERFACE
         MBED_CONF_MBEDTLS_PRESENT=1
+        # workaround for https://github.com/ARMmbed/mbedtls/issues/1077
+        MULADDC_CANNOT_USE_R7
 )
diff --git a/tools/cmake/profiles/debug.cmake b/tools/cmake/profiles/debug.cmake
@@ -78,7 +78,6 @@ function(mbed_set_profile_options target mbed_toolchain)
         target_compile_definitions(${target}
             INTERFACE
                 __ASSERT_MSG
-                MULADDC_CANNOT_USE_R7
         )
     endif()