Bug 610116

Summary:	dev-python/pyxattr fails install on crossdev: pyport.h:886:2: error: #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
Product:	Gentoo Linux	Reporter:	Kent Fredric (IRC: kent\n) (RETIRED) <kentnl>
Component:	Current packages	Assignee:	Robin Johnson <robbat2>
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	adborden, alexey+gentoo, email, herrtimson, necktwi, python, sam
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	cross-einfo

Description Kent Fredric (IRC: kent\n) (RETIRED) gentoo-dev

2017-02-20 21:18:21 UTC

Created attachment 464460 [details]
cross-einfo

>>> Compiling source in /usr/arm-unknown-linux-gnueabi/tmp/portage/dev-python/pyxattr-0.6.0/work/pyxattr-0.6.0 ...
 * python2_7: running distutils-r1_run_phase distutils-r1_python_compile
/usr/bin/python2.7 setup.py build
running build
running build_ext
building 'xattr' extension
creating /usr/arm-unknown-linux-gnueabi/tmp/portage/dev-python/pyxattr-0.6.0/work/pyxattr-0.6.0-python2_7/temp.linux-x86_64-2.7
arm-unknown-linux-gnueabi-gcc -O2 -pipe -fomit-frame-pointer -fPIC -D_XATTR_VERSION="0.6.0" -D_XATTR_AUTHOR="Iustin Pop" -D_XATTR_EMAIL="iustin@k1024.org" -I/usr/include/python2.7 -c xattr.c -o /usr/arm-unknown-linux-gnueabi/tmp/portage/dev-python/pyxattr-0.6.0/work/pyxattr-0.6.0-python2_7/temp.linux-x86_64-2.7/xattr.o -Wall -Wsign-compare
cc1: warning: include location "/usr/include/python2.7" is unsafe for cross-compilation [-Wpoison-system-directories]
In file included from /usr/include/python2.7/Python.h:58:0,
                 from xattr.c:25:
/usr/include/python2.7/pyport.h:886:2: error: #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
 #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
  ^
error: command 'arm-unknown-linux-gnueabi-gcc' failed with exit status 1


 * USE:        arm elibc_glibc kernel_linux python_targets_python2_7 python_targets_python3_4 userland_GNU



Happens with all versions.

Comment 1 Mike Gilbert gentoo-dev

2017-02-20 22:00:31 UTC

Cross-compiling python packages is not generally expected to work.

In this case, the native Python.h file from /usr/lib/python2.7 is being used; for the cross compile to work, distutils would have to be smart enough to use the python headers installed in the sysroot environment.

Comment 2 Eduardo Barreto Alexandre 2017-02-24 20:08:03 UTC

I have the same problem, and is not that I want to install python in my crossdev toolchain, it that some packages demand it.

Is there any workaround to it?

Comment 3 Mike Gilbert gentoo-dev

2017-02-24 21:45:03 UTC

(In reply to Eduardo Barreto Alexandre from comment #2)
> Is there any workaround to it?

Modify your USE flags so that pyxattr is not pulled into the depgraph.

Comment 4 Necktwi Ozfguah 2020-01-26 07:20:16 UTC

same error while merging pyblake (dependency to portage). any use flag mask to avoid pyblake as well?

Comment 5 tonemgub 2020-10-15 19:09:29 UTC

This occurs with dev-python/pypax as well. Only way around it is to remove sys-apps/elfix from hardened profile package world file.

Comment 6 Sam James archtester

2023-02-09 01:12:38 UTC

Ebuild now uses PEP517 and mgorny recently added cross-compile support to gpep517. This should work now.