[Bug target/86003] [8/9 Regression] GCC fails to build when configured --with-cpu=xscale
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86003 Richard Earnshaw changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #4 from Richard Earnshaw --- Fixed on trunk and gcc-8 branch.
[Bug target/86003] [8/9 Regression] GCC fails to build when configured --with-cpu=xscale
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86003 --- Comment #3 from Richard Earnshaw --- Author: rearnsha Date: Mon Jun 4 08:46:04 2018 New Revision: 261141 URL: https://gcc.gnu.org/viewcvs?rev=261141&root=gcc&view=rev Log: [arm] PR target/86003 build failures with --with-cpu=xscale The XScale cpu configuration in GCC has always been somewhat non-conforming. Although XScale isn't an architecture (it's simply an implementation of ARMv5te), we do by tradition emit a specific pre-define for it. We achieve this effect by adding an additional feature bit to the xscale CPU definition that isn't part of the base architecture. When I restructured the options last year I overlooked this oddity and the result, of course, is that this configuration now fails to build as intended. What happens is that the driver (correctly) constructs an architecture for the xscale cpu name (as armv5te) and passes it in addition to the CPU name. The backend code, on finding both a cpu and an architecture specifies attempts to correlate the two and finds a difference due to the additional feature bit and reports an inconsistency (fatally if -werror is specified). I think the best fix to this is to treat the xscale feature bit using the same mechanism that we use for other 'quirks' in CPU implementations and simply filter it out before comparing the capabilities. It has the additional benefit that it's also the simplest fix. PR target/86003 * config/arm/arm-cpus.in (ALL_QUIRKS): Add xscale feature to the list of bits to ignore when comparing architectures. Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/config/arm/arm-cpus.in
[Bug target/86003] [8/9 Regression] GCC fails to build when configured --with-cpu=xscale
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86003 --- Comment #2 from Richard Earnshaw --- Author: rearnsha Date: Mon Jun 4 08:41:45 2018 New Revision: 261140 URL: https://gcc.gnu.org/viewcvs?rev=261140&root=gcc&view=rev Log: [arm] PR target/86003 build failures with --with-cpu=xscale The XScale cpu configuration in GCC has always been somewhat non-conforming. Although XScale isn't an architecture (it's simply an implementation of ARMv5te), we do by tradition emit a specific pre-define for it. We achieve this effect by adding an additional feature bit to the xscale CPU definition that isn't part of the base architecture. When I restructured the options last year I overlooked this oddity and the result, of course, is that this configuration now fails to build as intended. What happens is that the driver (correctly) constructs an architecture for the xscale cpu name (as armv5te) and passes it in addition to the CPU name. The backend code, on finding both a cpu and an architecture specifies attempts to correlate the two and finds a difference due to the additional feature bit and reports an inconsistency (fatally if -werror is specified). I think the best fix to this is to treat the xscale feature bit using the same mechanism that we use for other 'quirks' in CPU implementations and simply filter it out before comparing the capabilities. It has the additional benefit that it's also the simplest fix. PR target/86003 * config/arm/arm-cpus.in (ALL_QUIRKS): Add xscale feature to the list of bits to ignore when comparing architectures. Modified: trunk/gcc/ChangeLog trunk/gcc/config/arm/arm-cpus.in
[Bug target/86003] [8/9 Regression] GCC fails to build when configured --with-cpu=xscale
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86003 Richard Biener changed: What|Removed |Added Target||arm Priority|P3 |P2 Target Milestone|--- |8.2
[Bug target/86003] [8/9 Regression] GCC fails to build when configured --with-cpu=xscale
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86003 Richard Earnshaw changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2018-05-30 Summary|[8 Regression] GCC fails to |[8/9 Regression] GCC fails |build when configured |to build when configured |--with-cpu=xscale |--with-cpu=xscale Ever confirmed|0 |1 --- Comment #1 from Richard Earnshaw --- Confirmed. Fix in testing.
