Bug 18942
| Summary: | change to include/linux/netdevice.h prevents compilation for ARM architecture with AEABI enabled | ||
|---|---|---|---|
| Product: | Platform Specific/Hardware | Reporter: | Ilya A. Volynets-Evenbakh (ilya) |
| Component: | ARM | Assignee: | linux-arm-kernel (linux-arm-kernel) |
| Status: | RESOLVED INVALID | ||
| Severity: | blocking | CC: | alan |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.35.4 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 22 Sep 2010 08:39:05 GMT bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=18942 > > Summary: change to include/linux/netdevice.h prevents > compilation for ARM architecture with AEABI enabled > Product: Platform Specific/Hardware > Version: 2.5 > Kernel Version: 2.6.35.4 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: blocking > Priority: P1 > Component: ARM > AssignedTo: linux-arm-kernel@lists.arm.linux.org.uk > ReportedBy: ilya@total-knowledge.com > Regression: No > > > I am trying to compile the latest kernel, and am running into the following > error: > In file included from include/linux/icmpv6.h:173, > from include/linux/ipv6.h:220, > from include/net/ipv6.h:16, > from include/linux/sunrpc/clnt.h:25, > from include/linux/nfs_fs.h:48, > from init/do_mounts.c:20: > include/linux/netdevice.h:1005: error: width of 'reg_state' exceeds its type > include/linux/netdevice.h:1010: error: width of 'rtnl_link_state' exceeds its > type > > > There was a change not too long ago, which converted reg_state to a bitfield, > which apparently doesn't work when -mabi=aapcs. > I tested it with a gcc versions 4.2.0, 4.4.2, and 4.4.4 and it holds true for > all of them. > > Here is simple test case: > struct test { > enum { NETREG_UNINITIALIZED=0, > } reg_state:16; > }; > > int main(int argc, char** argv) > { > struct test tt; > tt.reg_state=NETREG_UNINITIALIZED; > return 0; > } > > Compiles without -mabi=aapcs option, fails with. > Bummer. I guess that this abi requires that enums have `int' width for some reason? Does -mabi=aapcs actually get used, officially? All I can see in Linus's tree is z:/usr/src/linux-2.6.36-rc5> grep -r aapcs . ./arch/arm/Makefile:CFLAGS_ABI :=-mabi=aapcs-linux -mno-thumb-interwork Good question. Closer look at my tree revealed it was patched to replace aapcs-linux with aapcs, because old MontaVista compiler used originally didn't support it. I'll drop that patch from my tree. |
I am trying to compile the latest kernel, and am running into the following error: In file included from include/linux/icmpv6.h:173, from include/linux/ipv6.h:220, from include/net/ipv6.h:16, from include/linux/sunrpc/clnt.h:25, from include/linux/nfs_fs.h:48, from init/do_mounts.c:20: include/linux/netdevice.h:1005: error: width of 'reg_state' exceeds its type include/linux/netdevice.h:1010: error: width of 'rtnl_link_state' exceeds its type There was a change not too long ago, which converted reg_state to a bitfield, which apparently doesn't work when -mabi=aapcs. I tested it with a gcc versions 4.2.0, 4.4.2, and 4.4.4 and it holds true for all of them. Here is simple test case: struct test { enum { NETREG_UNINITIALIZED=0, } reg_state:16; }; int main(int argc, char** argv) { struct test tt; tt.reg_state=NETREG_UNINITIALIZED; return 0; } Compiles without -mabi=aapcs option, fails with.