Enable binary size optimisations

1 files changed, 5 insertions, 2 deletions

diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index 3cba6fa..7f90c2c 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -1,6 +1,9 @@
 cmake_minimum_required(VERSION 3.4.1)
 include(ExternalProject)
 
+set(CC_OPTIMISATION_FLAGS "-ffunction-sections -fdata-sections")
+set(LD_OPTIMISATION_FLAGS "-Wl,--gc-sections")
+
 set(xCONFIG
   "CC=${CMAKE_C_COMPILER} \
     ${CMAKE_C_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN}${CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN} \
@@ -9,8 +12,8 @@ set(xCONFIG
   "LD=${CMAKE_LINKER}"
   "AR=${CMAKE_AR}"
   "RANLIB=${CMAKE_RANLIB}"
-  "CFLAGS=${CMAKE_C_FLAGS}"
-  "LDFLAGS=${CMAKE_SHARED_LINKER_FLAGS}"
+  "CFLAGS=${CMAKE_C_FLAGS} ${CC_OPTIMISATION_FLAGS}"
+  "LDFLAGS=${CMAKE_SHARED_LINKER_FLAGS} ${LD_OPTIMISATION_FLAGS}"
   "--host=${CMAKE_C_COMPILER_TARGET}"
 )