[LLVMbugs] [Bug 18292] Incorrect intptr_t type on aarch64 (cross compiling from x86_64)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18292

Tilmann Scheller <t.scheller at samsung.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |t.scheller at samsung.com
         Resolution|---                         |WORKSFORME

--- Comment #1 from Tilmann Scheller <t.scheller at samsung.com> ---
Hi Simon,

Clang still doesn't have proper support for cross compilation (e.g. see
http://llvm.org/bugs/show_bug.cgi?id=4127).

In other words: only specifying the target triple is not enough, you need to
supply the header path as well (otherwise it will just pick the default header
paths, e.g. in your case the host headers)

Usually the easies way is to specify --sysroot and -gcc-toolchain, this is what
I use to cross-compile from x86-64 to AArch64:

-target arm64-unknown-linux-gnu -gcc-toolchain
/home/t/work/arm/gcc-linaro-aarch64-linux-gnu-4.8-2014.03_linux --sysroot
/home/t/work/arm/gcc-linaro-aarch64-linux-gnu-4.8-2014.03_linux/aarch64-linux-gnu/libc

The other option is to set the header search paths manually with -I and so on.

Regards,

Tilmann

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