[uml-devel] compile failure on uml-2.6.15-bs3-tls (and an easy fix)

[Erik Paulson <epaulson@cs.wisc.edu>]

Hello, 

On a CentOS 4.2 machine, I had the same failure that Bill Stearns had
back in January in this message:

http://www.mail-archive.com/user-mode-linux-devel@lists.sourceforge.net/msg02943.html

(the failure: 

arch/um/os-Linux/tls.c:48: error: syntax error before 'get_thread_area'
arch/um/os-Linux/tls.c:48: warning: type defaults to 'int' in declaration
of '_syscall1'
)

The small addition of #include <linux/unistd.h> fixed it for me.

Here's how I built my kernel:

tar xvfz /p/mirror/pub/mirrors/linux/kernel.org/pub/linux/kernel/v2.6/linux-2.6.15.6.tar.gz
wget http://www.user-mode-linux.org/~blaisorblade/patches/guest/uml-2.6.15-bs3-tls/uml-2.6.15-bs3-tls.patch.bz2
wget http://uml.nagafix.co.uk/kernels/kernel32-2.6.15.6-bs3-tls.config
bunzip2 uml-2.6.15-bs3-tls.patch.bz2
cd linux-2.6.15.6/
patch -p1 < ../uml-2.6.15-bs3-tls.patch
make mrproper ARCH=um
cp ../kernel32-2.6.15.6-bs3-tls.config .config
make ARCH=um oldconfig
make linux ARCH=um
vi arch/um/os-Linux/tls.c
make linux ARCH=um

teal(37)% gcc -v
Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.4/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux
Thread model: posix
gcc version 3.4.4 20050721 (Red Hat 3.4.4-2)

teal(40)% rpm -qa | grep glibc
glibc-utils-2.3.4-2.13
glibc-common-2.3.4-2.13
glibc-headers-2.3.4-2.13
glibc-2.3.4-2.13
glibc-devel-2.3.4-2.13
glibc-kernheaders-2.4-9.1.98.EL



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