From 7b3372ad384291d3994ae4626f15c7692d0c3094 Mon Sep 17 00:00:00 2001
From: peterbell10 <peterbell10@live.co.uk>
Date: Tue, 22 Aug 2017 20:56:32 +0100
Subject: Use target_compile_options instead of variables to add
 -fomit-frame-pointer to mbedtls

---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 124169ddd..1b92ca8e8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -277,6 +277,12 @@ endif()
 # (PolarSSL also has test and example programs in their CMakeLists.txt, we don't want those)
 include(lib/polarssl.cmake EXCLUDE_FROM_ALL)
 
+if(NOT MSVC AND "${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
+	target_compile_options(mbedtls PUBLIC -fomit-frame-pointer)
+endif()
+
 set_exe_flags()
 
 add_subdirectory(src)
-- 
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