[uml-devel] __attribute_used__ error on 2.6.23.9

[Quantum Skyline <quantum.skyline@gmail.com>]

Hi,

I've been trying to modify the UML makefiles in the 2.6.23.9 kernel to 
compile against a different C library, but I'm running into trouble 
getting parts of UML to compile with GCC 4.2.1.  In particular, files in 
os-Linux that use functions like __uml_setup are causing GCC to throw 
errors.

For example, when I try to compile arch/um/os-Linux/aio.c in my 
environment, I get the following:

gcc-4.2.1-rev -Wp,-MD,arch/um/os-Linux/.aio.o.d  -Wall -Wundef 
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common 
-Werror-implicit-function-declaration -Os -D__arch_um__ 
-DSUBARCH=\"i386\" -Dvmap=kernel_vmap 
-Din6addr_loopback=kernel_in6addr_loopback 
-Din6addr_any=kernel_in6addr_any -march=i686 
-mpreferred-stack-boundary=2 -ffreestanding -D_LARGEFILE64_SOURCE 
-fno-unit-at-a-time -fno-omit-frame-pointer -fno-optimize-sibling-calls 
-g -fno-stack-protector -Wdeclaration-after-statement -Wno-pointer-sign 
-Iarch/um/include 
-I/home/tmjackso/build/orchestra/uml/linux-2.6.23.9/arch/um/include/skas 
-D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D_LARGEFILE64_SOURCE 
-DHAVE_AIO_ABI -v -nostdinc -I../../dietlibc/trunk/include -isystem 
/usr/local/gcc-4.2.1-rev/include -c -o arch/um/os-Linux/aio.o 
arch/um/os-Linux/aio.c
arch/um/os-Linux/aio.c:307: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘__attribute_used__’
arch/um/os-Linux/aio.c:307: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘__attribute_used__’
arch/um/os-Linux/aio.c:350: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘__attribute_used__’
arch/um/os-Linux/aio.c:360: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or 
‘__attribute__’ before ‘__attribute_used__’

I know that __uml_setup and friends are defined in 
arch/um/include/init.h and it is being included, but it seems like GCC 
is not using it.  If I comment out __uml_setup, other files which have 
functions starting with two underscores like __uml_initcall also cause 
compilation to fail.

Can anyone give some hints to solve this problem?

Cheers,

Todd Jackson

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