arch: ARM: set -mthumb, -mcpu, -mfpu and -mfloat-abi in linker flags

Some toolchains are built with multilib enabled in order to provide multiple versions of the same library, optimized for different ABI or architecture. They require the the ABI/architecture/CPU selection options to be passed at linked time. This is important for example when linking with newlib. Signed-off-by: Aurelien Jarno <[email protected]>
dagar · Dec 5, 2018 · c6727d4 · c6727d4
1 parent d941df7
commit c6727d4
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -162,6 +162,10 @@ zephyr_compile_options(
 )
 endif()
 
+zephyr_ld_options(
+  ${TOOLCHAIN_LD_FLAGS}
+)
+
 if(NOT CONFIG_NATIVE_APPLICATION)
 zephyr_ld_options(
   -nostdlib

diff --git a/cmake/compiler/gcc.cmake b/cmake/compiler/gcc.cmake
@@ -82,15 +82,22 @@ else()
       -mthumb
       -mcpu=${GCC_M_CPU}
       )
+    list(APPEND TOOLCHAIN_LD_FLAGS
+      -mthumb
+      -mcpu=${GCC_M_CPU}
+      )
 
     include(${ZEPHYR_BASE}/cmake/fpu-for-gcc-m-cpu.cmake)
 
     if(CONFIG_FLOAT)
       list(APPEND TOOLCHAIN_C_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
+      list(APPEND TOOLCHAIN_LD_FLAGS -mfpu=${FPU_FOR_${GCC_M_CPU}})
       if    (CONFIG_FP_SOFTABI)
         list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=softfp)
+        list(APPEND TOOLCHAIN_LD_FLAGS -mfloat-abi=softfp)
       elseif(CONFIG_FP_HARDABI)
         list(APPEND TOOLCHAIN_C_FLAGS -mfloat-abi=hard)
+        list(APPEND TOOLCHAIN_LD_FLAGS -mfloat-abi=hard)
       endif()
     endif()
   elseif("${ARCH}" STREQUAL "arc")