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