Re: [2.6 patch] remove support for gcc < 3.2

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Mon, 2005-08-01 00:26:07 +0200, Adrian Bunk <bunk@stusta.de> wrote:
> This patch removes support for gcc < 3.2 .
> 
> The advantages are:
> - reducing the number of supported gcc versions from 8 to 4 [1]
>   allows the removal of several #ifdef's and workarounds
[...]
> [1] support removed: 2.95, 2.96, 3.0, 3.1
>     still supported: 3.2, 3.3, 3.4, 4.0

This patch in mind, I built the vax-linux kernel again with gcc-HEAD
(gcc-4.1) and it blew off in:

$ make V=1 ARCH=vax CROSS_COMPILE=vax-linux- mopboot
[...]
  vax-linux-gcc -Wp,-MD,init/.initramfs.o.d  -nostdinc -isystem /home/jbglaw/vax-linux/scm/build-20050802-171439-vax-linux/install/usr/lib/gcc/vax-linux/4.1.0/include -D__KERNEL__ -Iinclude  -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -ffreestanding -O1 -fomit-frame-pointer -pipe -Wdeclaration-after-statement -Wno-pointer-sign    -DKBUILD_BASENAME=initramfs -DKBUILD_MODNAME=initramfs -c -o init/initramfs.o init/initramfs.c
init/initramfs.c:10: error: message causes a section type conflict
init/initramfs.c:33: error: head causes a section type conflict
init/initramfs.c:80: error: ino causes a section type conflict
init/initramfs.c:80: error: major causes a section type conflict
[...]

Adding -fno-unit-at-a-time fixed this, but from what Google found, this
is actually a bug in the C sources: the __initdata variables are to be
put into a read-only segment but are missing a const qualifyer, so
-fno-unit-at-a-time seems to hide a bug here.

Could somebody comment on this? Or shall I open a bug report for GCC?

MfG, JBG

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