Date: Sun, 18 Oct 2015 01:03:43 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r289477 - head/sys/arm/mv Message-ID: <201510180103.t9I13h0w056671@repo.freebsd.org>
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Author: ian Date: Sun Oct 18 01:03:43 2015 New Revision: 289477 URL: https://svnweb.freebsd.org/changeset/base/289477 Log: Fix a strange macro re-definition compile error. If the VM_MAXUSER_ADDRESS value is defined as a config option the definition is emitted into opt_global.h which is force-included into everything. In addition, the symbol is emitted by the genassym mechanism, but that by its nature reduces the value to a 0xnnnnnnnn number. When compiling a .S file you end up with two different definitions of the macro (they evaluate to the same number, but the text is different, upsetting the compiler). Nothing has changed about this code for a while but the compile error is new, so this must be fallout from the clang 3.7 update or something. Modified: head/sys/arm/mv/std-pj4b.mv Modified: head/sys/arm/mv/std-pj4b.mv ============================================================================== --- head/sys/arm/mv/std-pj4b.mv Sun Oct 18 00:59:28 2015 (r289476) +++ head/sys/arm/mv/std-pj4b.mv Sun Oct 18 01:03:43 2015 (r289477) @@ -5,4 +5,8 @@ cpu CPU_MV_PJ4B machine arm armv6 makeoptions CONF_CFLAGS="-march=armv7a" -options VM_MAXUSER_ADDRESS="(KERNBASE-(1024*1024*1024))" +# This was originally defined as "(KERNBASE-(1024*1024*1024))" but that +# (in opt_global.h) clashed with the value emitted by genassym which +# reduces the original macro text to its numeric value. The only way +# to avoid that is to define it here as the numeric value genassym emits. +options VM_MAXUSER_ADDRESS="0x80000000"
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