Howto enable thread-local storage?
- From: "Stan R." <stan@xxxxxxxxxxx/hmrprint/com.com>
- Date: Mon, 9 Oct 2006 09:27:44 -0700
How does one enable thread-local storage?
I'm in the process of adding an updated glibc to my system (with prefix
/usr/local/glibc2.4/, so not to break anything using the old glibc that
came with this redhat box.)
First, I had to get the newest GCC, version 4.1.1, so I compiled it with
this configure line:
../gcc/configure --prefix=/usr/local/gcc4 --enable-threads=posix
It built, and make install then succeeded and from there, I went to
build glibc 2.4:
../glibc-2.4/configure --prefix=/usr/local/glibc2.4 --enable-addons
CC=/usr/local/gcc4/bin/gcc
In the the middle of the "checking" list I noticed "checking for
__thread... no" but it keeps going until this:
checking for __thread... no
.
.
.
checking for i386 TLS support... no
running configure fragment for nptl/sysdeps/pthread
configure: error: compiler support for __thread is required
Ok, and I've bene furiously search both google web and groups for how to
enable TLS (thread-local storage), as this is basically the test
configure performs that fails:
$ echo '__thread int a;' | /usr/local/gcc4/bin/gcc -xc - -S -o test
<stdin>:1: error: thread-local storage not supported for this target
Same if I try to compile the following:
(temp.c)
__thread int i;
int main() {
return 0;
}
I get the same error (as the code is basically the same):
$ /usr/local/gcc4/bin/gcc temp.c -o temp
temp.c:1: error: thread-local storage not supported for this target
I found a google groups post,
http://groups.google.com/group/gnu.gcc.help/tree/browse_frm/thread/f23644e07b21516e?fwc=1#doc_2beeb26e6449dfcf
that seems to suggest that suppost is needed in the assembler. I'm not
sure if this is the case, but if it is, how/where do I get a nnew
assembler. I searched aroudn but really got no where.
Thanks for any help.
# uname -a
Linux ***** 2.4.20-20.7 #1 Mon Aug 18 14:56:30 EDT 2003 i686 unknown
--
Stan
.
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