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-rw-r--r--SetFlags.cmake2
1 files changed, 2 insertions, 0 deletions
diff --git a/SetFlags.cmake b/SetFlags.cmake
index c0192f4ab..e0eb05ef1 100644
--- a/SetFlags.cmake
+++ b/SetFlags.cmake
@@ -108,6 +108,8 @@ macro(set_flags)
endif()
if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm")
+ # mbed TLS uses the frame pointer's register in inline assembly:
+ # https://tls.mbed.org/kb/development/arm-thumb-error-r7-cannot-be-used-in-asm-here
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fomit-frame-pointer")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -fomit-frame-pointer")
endif()