Bug 4399

Summary:	Unable to use Ubuntu 11.10 arm cross compiler
Product:	buildroot	Reporter:	Alexander <fenixk19>
Component:	Other	Assignee:	unassigned
Status:	RESOLVED INVALID
Severity:	normal	CC:	buildroot
Priority:	P5
Version:	unspecified
Target Milestone:	2011.08
Hardware:	PC
OS:	Linux
Host:		Target:
Build:
Attachments:	A patch, can be used as workaround

Description Alexander 2011-10-29 15:29:59 UTC

Attempt to use ubuntu arm cross-compiler (package gcc-4.6-arm-linux-gnueabi) as an external toolchain fails with the following message:

Checking external toolchain settings
Incorrect selection of the C library
make: *** [/home/fenixk19/Development/samsung/OS/buildroot/output/stamps/ext-toolchain-checked] Ошибка 255

Thats because there is a string in ext-tool.mk:
SYSROOT_DIR=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a) |sed -r -e 's:usr/lib/libc\.a::;'` ; 

But "arm-linux-gnueabi-gcc -print-file-name=libc.a" returns "/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../../../arm-linux-gnueabi/lib/../lib/libc.a"

So sed works with wrong pattern here. This should be 's:lib/libc\.a::;' for Ubuntu.

Comment 1 Alexander 2011-10-29 15:36:25 UTC

Created attachment 3703 [details]
A patch, can be used as workaround

Comment 2 Thomas Petazzoni 2011-10-30 20:27:21 UTC

I had the same problem trying to use the Ubuntu ARM cross-compiler. Unfortunately, while it allows to go a bit further, it doesn't fix the fact that the Ubuntu ARM cross-compiler is not a *pure* toolchain: it contains many more libraries and utilities compiled for the target than a normal toolchain, and this doesn't play well with build systems, including Buildroot.

For that reason, we do not support building with the Ubuntu ARM cross-compiler at the moment. Either build your toolchain with Buildroot or Crosstool-NG, or get a pre-compiled one from CodeSourcery (which offers pure toolchains).