Date: Thu, 24 Dec 2020 13:21:24 +0000 From: bugzilla-noreply@freebsd.org To: x11@FreeBSD.org Subject: [Bug 249954] graphics/drm-kmod : Fails to build on FreeBSD 12.2-BETA1 r365618 GENERIC powerpc 32 bit : /usr/src/sys/vm/vm_page.h:204: error: field 'md' has incomplete type Message-ID: <bug-249954-7141-kGEJrpi0l2@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-249954-7141@https.bugs.freebsd.org/bugzilla/> References: <bug-249954-7141@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D249954 lfmorrison@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |lfmorrison@gmail.com --- Comment #2 from lfmorrison@gmail.com --- I saw this some time ago as well, but the specifics may be a little rusty. I never found a solution. As I recall, this seems to be a consequence of the way the kernel deals with two different ways in which various PowerPC hardware deals with virtual mem= ory. Some use the legacy "AIM" (Apple-IBM-Motorola) model, and others use an alternate Book-E" model, which was added to make PowerPC more palatable for embedded systems. Application code works identically on processors using either VM model, but= the kernel code needs to work differently. The FreeBSD kernel has support for b= oth VM models, but a compile-time define needs to be supplied to specify which model is used for the targeted CPU; this configuration parameter leads to, among other things, different definitions of the struct in question. When building drm-kmod, the build system somehow needs to be told whether t= he kernel module is being built for AIM or Book-E in order to get past this er= ror. Since running into this issue, the increasing in dependency that various po= rts have on a bootstrap rustc compiler (which doesn't exist upstream for 32-bit PowerPC on FreeBSD) has left me reluctant to go much further in my experime= nts with graphical environments. --=20 You are receiving this mail because: You are the assignee for the bug.=
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