https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124897
Bug ID: 124897
Summary: The default multilib set of amdgcn fails to build with
llvm19
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: build, documentation
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
Target: amdgcn
Docs say
By default, multilib support is built for @code{gfx908}, @code{gfx90a},
@code{gfx9-generic}, @code{gfx9-4-generic}, @code{gfx10-3-generic}, and
@code{gfx11-generic}, which covers all supported archs. The default multilib
configuration requires LLVM 19 or newer. LLVM 13.0.1 or LLVM 14 can be used by
specifying a @code{--with-multilib-list=} that only lists GFX9 or GFX10-3
devices, while LLVM 15 is required for GFX 11 device and @code{gfx1036}.
At least LLVM 16 is required for @code{gfx1150} and @code{gfx1151},
LLVM 18 for @code{gfx942}, LLVM 19 for the generic @code{gfx9-generic},
@code{gfx10-3-generic}, and @code{gfx11-generic} targets and for
@code{gfx1152},
while LLVM 20 is required for @code{gfx950}, @code{gfx1153}, and
@code{gfx9-4-generic}.
and I get
configure:3580:
/home/abuild/rpmbuild/BUILD/cross-amdgcn-gcc16-16.0.1+git8664-build/gcc-16.0.1+git8664/obj-x86_64-suse-linux/./gcc/xgcc
-B/home/abuild/rpmbuild/BUILD/cross-amdgcn-gcc16-16.0.1+git8664-build/gcc-16.0.1+git8664/obj-x86_64-suse-linux/./gcc/
-nostdinc
-B/home/abuild/rpmbuild/BUILD/cross-amdgcn-gcc16-16.0.1+git8664-build/gcc-16.0.1+git8664/obj-x86_64-suse-linux/amdgcn-amdhsa/gfx9-4-generic/newlib/
-isystem
/home/abuild/rpmbuild/BUILD/cross-amdgcn-gcc16-16.0.1+git8664-build/gcc-16.0.1+git8664/obj-x86_64-suse-linux/amdgcn-amdhsa/gfx9-4-generic/newlib/targ-include
-isystem
/home/abuild/rpmbuild/BUILD/cross-amdgcn-gcc16-16.0.1+git8664-build/gcc-16.0.1+git8664/newlib/libc/include
-B/usr/amdgcn-amdhsa/bin/ -B/usr/amdgcn-amdhsa/lib/gfx9-4-generic
-B/usr/amdgcn-amdhsa/lib/ -isystem /usr/amdgcn-amdhsa/include -isystem
/usr/amdgcn-amdhsa/sys-include -march=gfx9-4-generic -o conftest -g -O2
conftest.c >&5
'gfx9-4-generic' is not a recognized processor for this target (ignoring
processor)
'gfx9-4-generic' is not a recognized processor for this target (ignoring
processor)
/tmp/ccjVt9RK.s:1:17: error: .amdgcn_target directive's target id
amdgcn-unknown-amdhsa--gfx9-4-generic does not match the specified target id
amdgcn-unknown-amdhsa--gfx000
.amdgcn_target "amdgcn-unknown-amdhsa--gfx9-4-generic"
^
/tmp/ccjVt9RK.s:35:4: error: directive requires gfx8+
.amdhsa_reserve_xnack_mask 1
^~~~~~~~~~~~~~~~~~~~~~~~~~
...
