[Buildroot] [PATCH 2/2] package/gcc: add support for D language
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Tue Oct 1 06:56:05 UTC 2019
Hello,
On Tue, 1 Oct 2019 07:56:14 +0200
Eric Le Bihan <eric.le.bihan.dev at free.fr> wrote:
> The D programming language needs a runtime, named libgphobos. When
> building a toolchain with uclibc-ng as libc, for qemu_aarch64_virt, the
> following error occurs:
>
> ```
> libtool: compile: /home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/build/host-gcc-final-9.2.0/build/./gcc/gdc -B/home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/build/host-gcc-final-9.2.0/build/./gcc/ -B/home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/host/aarch64-buildroot-linux-uclibc/bin/ -B/home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/host/aarch64-buildroot-linux-uclibc/lib/ -isystem /home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/host/aarch64-buildroot-linux-uclibc/include -isystem /home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/host/aarch64-buildroot-linux-uclibc/sys-include -fPIC -O2 -g -nostdinc -I ../../../../libphobos/libdruntime -I . -c ../../../../libphobos/libdruntime/core/internal/abort.d -fversion=Shared -o core/internal/.libs/abort.o
> /home/eric/build/demo-dlang/qemu/aarch64/virt/uclibc/build/host-gcc-final-9.2.0/libphobos/libdruntime/core/sys/posix/sys/types.d:1134:39: error: undefined identifier '__SIZEOF_PTHREAD_ATTR_T'
> 1134 | byte[__SIZEOF_PTHREAD_ATTR_T] __size;
This is off because __SIZEOF_PTHREAD_ATTR_T is defined by uClibc-ng,
for example for AArch64:
libpthread/nptl/sysdeps/unix/sysv/linux/aarch64/bits/pthreadtypes.h:#define __SIZEOF_PTHREAD_ATTR_T 64
libpthread/nptl/sysdeps/unix/sysv/linux/aarch64/bits/pthreadtypes.h: char __size[__SIZEOF_PTHREAD_ATTR_T];
Perhaps there's an include missing in gcc ?
However, musl does not define __SIZEOF_PTHREAD_ATTR_T.
> I haven't dug into uclibc-ng code to find out the cause of the error.
> Hence the restriction to a glibc-based toolchain.
Fair enough, but it should be explained with a short comment above the
dependency.
Thanks!
Thomas
--
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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