Re: [Discuss-gnuradio] Problems building GNURadio

[ttsou]

On Mon, Sep 22, 2014 at 04:27:13PM -0700, Tom Tsou wrote:
> On Mon, Sep 22, 2014 at 4:08 PM, Philip Balister <address@hidden> wrote:
> > On 09/22/2014 02:13 PM, Tom Tsou wrote:
> >> cmake ../ -DCMAKE_C_FLAGS="-march=armv7-a -mthumb-interwork
> >> -mfloat-abi=hard -mfpu=neon-vfpv4 -mtune=cortex-a15"
> >> -DCMAKE_ASM_FLAGS="-march=armv7-a -mthumb-interwork -mfloat-abi=hard
> >> -mfpu=neon-vfpv4 -mtune=cortex-a15"
> >>
> >
> > We should add the ASM fags to the toolchain files.
> 
> For native build, the missing piece is architecture detection. Until
> that works sufficiently well, some type of setting(s) will need to
> feed in manually.

The following works after adjusting for hard/softfp appropriately. The
result is cleaner than the above C and ASM flags, but, regardless, the
selection of CPU and hard-float ABI needs come from the user at some
point.

cmake ../ -DCMAKE_TOOLCHAIN_FILE=../cmake/Toolchains/arm_cortex_a8_native.cmake

diff --git a/cmake/Toolchains/arm_cortex_a8_native.cmake 
b/cmake/Toolchains/arm_cortex_a8_native.cmake
index 8e60eaa..9764577 100644
--- a/cmake/Toolchains/arm_cortex_a8_native.cmake
+++ b/cmake/Toolchains/arm_cortex_a8_native.cmake
@@ -6,3 +6,4 @@ set(CMAKE_CXX_COMPILER g++)
 set(CMAKE_C_COMPILER  gcc)
 set(CMAKE_CXX_FLAGS "-march=armv7-a -mtune=cortex-a8 -mfpu=neon 
-mfloat-abi=softfp" CACHE STRING "" FORCE)
 set(CMAKE_C_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "" FORCE) #same flags for C 
sources
+set(CMAKE_ASM_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "" FORCE) #same flags for 
ASM sources

  -TT