On 07/12/14 07:27 AM, Michael Jones wrote:
Karel,
I have failed to figure out how to make this happen:
("target arch", "ArchARM {armISA = ARMv7, armISAExt = [VFPv3,NEON], armABI = HARD}”)
This is result of running ./configure on arm/ubuntu12.04 -- so I don't cross-compile, but rather compile natively. This is still preferred way to be able to run testsuite AFAIK...
I have added poky to the list of vendors in aclocal.m4 then configured like this:
/configure --target=arm-poky-linux-gnueabi --with-gcc=arm-poky-linux-gnueabi-gcc
But I end up with ARMv5.
I am new to Autotools and the Haskell build system, so I am not sure what controls this. I assume the idea is that the gcc cross-compiler compiles some code that checks for versions when it evaluates stuff like:
AC_COMPILE_IFELSE([ AC_LANG_PROGRAM( [], [#if defined(__ARM_ARCH_2__) || \ defined(__ARM_ARCH_3__) || \ defined(__ARM_ARCH_3M__) || \ defined(__ARM_ARCH_4__) || \ defined(__ARM_ARCH_4T__) || \
You arm-poky-linux-gnueabi-gcc -v tells what? Also arm-poky-linux-gnueabi-gcc -dM -E - < /dev/null may tell you something.
So I then suspect the compiler needs options like -mcpu=cortex-a9 -mfpu=neon to make the proper version defined, so that the code can check the architecture.
It depends on how the compiler is configured. -v will tell you. Mine looks like: karel@panda:~$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabi/4.6/lto-wrapper Target: arm-linux-gnueabi Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --build=arm-linux-gnueabi --host=arm-linux-gnueabi --target=arm-linux-gnueabi Thread model: posix gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) Please note --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb -- I'm sure you will also be able to build a cross-compiler using those option, so it'll generate ARMv7A code by default, use just half of VFPv3 regs (VFPv3-D16) and generate Thumbs isns by default (not ARM). Karel