glibc, error: compiler support for __thread is required

StefanTh · 01-19-2011, 02:23 AM

Hi

I have a NAS (dlink-320) with a fully working fun_plug (http://wiki.dns323.info/) Linux system.

However when I try to install x263 the configuration scripts says it need the math function log2f()

But because fun_plug uses uClib instead of glibc and uClib have not yet implemented log2f() function I am trying to compile the glibc instead.

I am only interested in the math part of glibc but have not found any documentation to just compile this part so it seems that I have to compile "most" of it.

I have glibc-2.11.2 and glibc-ports-2.9

I have copied glibc-ports-2.9/sysdeps/arm to glibc-2.11.2/sysdeps.

and I enter

Code:

../configure --prefix=/ffp --libdir=/ffp/lib --includedir=/ffp/include --enable-shared --build=arm-linux

but get the following error message

Code:

running configure fragment for sysdeps/arm/elf
checking for ARM TLS support... yes
running configure fragment for nptl/sysdeps/pthread
configure: error: compiler support for __thread is required

1)
Why is this error occur and how do I fix this problem fairly easy?
I have tried to removing the nptl directory and used flag --disable-sanity-checks but this does not feels like the right way.

2)
Is it correct to glibc-ports-2.9/sysdeps/arm to glibc-2.11.2/sysdeps or should it have been done in some other way ?

/Stefan

business_kid · 01-19-2011, 08:36 AM

Think twice about this: The toolchain comprises gcc, kernel headers, and libc (uClibc or glibc). You could easily end up with an unworkable system, where programs don't run. Back up first.

I would go to linuxfromscratch.org where they have very detailed instructions in their stable book for compiling glibc. Compile plenty, install little - that's my advice.

StefanTh · 01-19-2011, 11:41 AM

[QUOTE

I would go to linuxfromscratch.org where they have very detailed instructions in their stable book for compiling glibc. Compile plenty, install little - that's my advice.[/QUOTE]

thanks for your response,
I will check them up, I am only interested in the math libraries, not really to install the whole glibc.

/Stefan