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Date
[Bug 2121375] [NEW] FTBFS with GCC 15.2

To: debcrafters-packages@xxxxxxxxxxxxxxxxxxx
From: Heinrich Schuchardt <2121375@xxxxxxxxxxxxxxxxxx>
Date: Mon, 25 Aug 2025 11:20:23 -0000
Reply-to: Bug 2121375 <2121375@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

In GCC 15.2 we have enbabled RVA23 extensions including vector
instructions.

When trying to rebuild the package an error occurs. This has been
reported to GCC upstream in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121512.

Since release 1.2.0 highway has received RISC-V vector related fixed, e.g.
9cff02ac65ac ("Fixes to compilation errors with RVV with EMU128 or SCALAR baseline")

#!/bin/sh
/usr/bin/c++ \
  -g \
  -O2 \
  -freport-bug \
  -fno-omit-frame-pointer \
  -ffile-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=. \
  -flto=auto \
  -ffat-lto-objects \
  -fstack-protector-strong \
  -Wformat \
  -Werror=format-security \
  -fno-stack-clash-protection \
  -fdebug-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=/usr/src/highway-1.2.0-3ubuntu3 \
  -DHWY_BROKEN_EMU128=0 \
  -Wdate-time \
  -D_FORTIFY_SOURCE=3 \
  -Wl,-Bsymbolic-functions \
  -flto=auto \
  -ffat-lto-objects \
  -Wl,-z,relro \
  -Wl,-z,now     \
  -fPIE \
  -pie \
  -Wl,--dependency-file=CMakeFiles/hwy_benchmark.dir/link.d CMakeFiles/hwy_benchmark.dir/hwy/examples/benchmark.cc.o \
  -o examples/hwy_benchmark  \
  -Wl,-rpath,/home/${USER}/workspace/build-highway/highway-1.2.0/obj-riscv64-linux-gnu  libhwy.so.1.2.0

during RTL pass: expand
In function ‘BitCastToByte’,
    inlined from ‘BitCast’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:901:33,
    inlined from ‘Zero’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:695:17,
    inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:118:18,
    inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:75:61,
    inlined from ‘CallClosure’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/nanobenchmark.h:154:14:
/usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:866:1: internal compiler error: in generate_insn, at config/riscv/riscv-vector-builtins.cc:4470
0x243847d internal_error(char const*, ...)
	../../src/gcc/diagnostic-global-context.cc:517
0x5b67bf fancy_abort(char const*, int, char const*)
	../../src/gcc/diagnostic.cc:1749
0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4470
0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4468
0xdde4fd riscv_vector::function_expander::expand()
	../../src/gcc/config/riscv/riscv-vector-builtins.h:688
0xdde4fd riscv_vector::expand_builtin(unsigned int, tree_node*, rtx_def*)
	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4990
0x72cb91 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	../../src/gcc/expr.cc:12499
0x733497 store_expr(tree_node*, rtx_def*, int, bool, bool)
	../../src/gcc/expr.cc:6771
0x734575 expand_assignment(tree_node*, tree_node*, bool)
	../../src/gcc/expr.cc:6492
0x647a85 expand_call_stmt
	../../src/gcc/cfgexpand.cc:3143
0x647a85 expand_gimple_stmt_1
	../../src/gcc/cfgexpand.cc:4218
0x647a85 expand_gimple_stmt
	../../src/gcc/cfgexpand.cc:4365
0x64bce3 expand_gimple_basic_block
	../../src/gcc/cfgexpand.cc:6483
0x64bce3 execute
	../../src/gcc/cfgexpand.cc:7232
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-15/README.Bugs> for instructions.
make: *** [/tmp/ccRMqIG3.mk:2: /tmp/ccG6RxKY.ltrans0.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
--- 
ProblemType: Bug
ApportVersion: 2.33.1-0ubuntu2
Architecture: riscv64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
DistroRelease: Ubuntu 25.10
InstallationDate: Installed on 2025-03-17 (161 days ago)
InstallationMedia: Ubuntu-Server 25.04 "Plucky Puffin" - Daily riscv64 (20250316)
Package: highway
PackageArchitecture: riscv64
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
ProcVersionSignature: Ubuntu 6.14.0-22.22.1-generic 6.14.5
Tags: questing
Uname: Linux 6.14.0-22-generic riscv64
UpgradeStatus: Upgraded to questing on 2025-05-17 (100 days ago)
UserGroups: N/A
_MarkForUpload: True

** Affects: gcc-15 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: highway (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected questing

** Also affects: gcc-15 (Ubuntu)
   Importance: Undecided
       Status: New

** Tags added: apport-collected questing

** Description changed:

  In GCC 15.2 we have enbabled RVA23 extensions including vector
  instructions.
  
  When trying to rebuild the package an error occurs. This has been
  reported to GCC upstream in
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121512.
  
  Since release 1.2.0 highway has received RISC-V vector related fixed, e.g.
  9cff02ac65ac ("Fixes to compilation errors with RVV with EMU128 or SCALAR baseline")
  
  #!/bin/sh
  /usr/bin/c++ \
    -g \
    -O2 \
    -freport-bug \
    -fno-omit-frame-pointer \
    -ffile-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=. \
    -flto=auto \
    -ffat-lto-objects \
    -fstack-protector-strong \
    -Wformat \
    -Werror=format-security \
    -fno-stack-clash-protection \
    -fdebug-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=/usr/src/highway-1.2.0-3ubuntu3 \
    -DHWY_BROKEN_EMU128=0 \
    -Wdate-time \
    -D_FORTIFY_SOURCE=3 \
    -Wl,-Bsymbolic-functions \
    -flto=auto \
    -ffat-lto-objects \
    -Wl,-z,relro \
    -Wl,-z,now     \
    -fPIE \
    -pie \
    -Wl,--dependency-file=CMakeFiles/hwy_benchmark.dir/link.d CMakeFiles/hwy_benchmark.dir/hwy/examples/benchmark.cc.o \
    -o examples/hwy_benchmark  \
    -Wl,-rpath,/home/${USER}/workspace/build-highway/highway-1.2.0/obj-riscv64-linux-gnu  libhwy.so.1.2.0
  
  during RTL pass: expand
  In function ‘BitCastToByte’,
      inlined from ‘BitCast’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:901:33,
      inlined from ‘Zero’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:695:17,
      inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:118:18,
      inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:75:61,
      inlined from ‘CallClosure’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/nanobenchmark.h:154:14:
  /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:866:1: internal compiler error: in generate_insn, at config/riscv/riscv-vector-builtins.cc:4470
  0x243847d internal_error(char const*, ...)
  	../../src/gcc/diagnostic-global-context.cc:517
  0x5b67bf fancy_abort(char const*, int, char const*)
  	../../src/gcc/diagnostic.cc:1749
  0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4470
  0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4468
  0xdde4fd riscv_vector::function_expander::expand()
  	../../src/gcc/config/riscv/riscv-vector-builtins.h:688
  0xdde4fd riscv_vector::expand_builtin(unsigned int, tree_node*, rtx_def*)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4990
  0x72cb91 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
  	../../src/gcc/expr.cc:12499
  0x733497 store_expr(tree_node*, rtx_def*, int, bool, bool)
  	../../src/gcc/expr.cc:6771
  0x734575 expand_assignment(tree_node*, tree_node*, bool)
  	../../src/gcc/expr.cc:6492
  0x647a85 expand_call_stmt
  	../../src/gcc/cfgexpand.cc:3143
  0x647a85 expand_gimple_stmt_1
  	../../src/gcc/cfgexpand.cc:4218
  0x647a85 expand_gimple_stmt
  	../../src/gcc/cfgexpand.cc:4365
  0x64bce3 expand_gimple_basic_block
  	../../src/gcc/cfgexpand.cc:6483
  0x64bce3 execute
  	../../src/gcc/cfgexpand.cc:7232
  Please submit a full bug report, with preprocessed source.
  Please include the complete backtrace with any bug report.
  See <file:///usr/share/doc/gcc-15/README.Bugs> for instructions.
  make: *** [/tmp/ccRMqIG3.mk:2: /tmp/ccG6RxKY.ltrans0.ltrans.o] Error 1
  lto-wrapper: fatal error: make returned 2 exit status
  compilation terminated.
  /usr/bin/ld: error: lto-wrapper failed
  collect2: error: ld returned 1 exit status
+ --- 
+ ProblemType: Bug
+ ApportVersion: 2.33.1-0ubuntu2
+ Architecture: riscv64
+ CasperMD5CheckResult: skip
+ CurrentDesktop: XFCE
+ DistroRelease: Ubuntu 25.10
+ InstallationDate: Installed on 2025-03-17 (161 days ago)
+ InstallationMedia: Ubuntu-Server 25.04 "Plucky Puffin" - Daily riscv64 (20250316)
+ Package: highway
+ PackageArchitecture: riscv64
+ ProcEnviron:
+  LANG=en_US.UTF-8
+  PATH=(custom, no user)
+  SHELL=/bin/bash
+  TERM=xterm-256color
+ ProcVersionSignature: Ubuntu 6.14.0-22.22.1-generic 6.14.5
+ Tags: questing
+ Uname: Linux 6.14.0-22-generic riscv64
+ UpgradeStatus: Upgraded to questing on 2025-05-17 (100 days ago)
+ UserGroups: N/A
+ _MarkForUpload: True

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to highway in Ubuntu.
https://bugs.launchpad.net/bugs/2121375

Title:
  FTBFS with GCC 15.2

Status in gcc-15 package in Ubuntu:
  New
Status in highway package in Ubuntu:
  New

Bug description:
  In GCC 15.2 we have enbabled RVA23 extensions including vector
  instructions.

  When trying to rebuild the package an error occurs. This has been
  reported to GCC upstream in
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121512.

  Since release 1.2.0 highway has received RISC-V vector related fixed, e.g.
  9cff02ac65ac ("Fixes to compilation errors with RVV with EMU128 or SCALAR baseline")

  #!/bin/sh
  /usr/bin/c++ \
    -g \
    -O2 \
    -freport-bug \
    -fno-omit-frame-pointer \
    -ffile-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=. \
    -flto=auto \
    -ffat-lto-objects \
    -fstack-protector-strong \
    -Wformat \
    -Werror=format-security \
    -fno-stack-clash-protection \
    -fdebug-prefix-map=/home/${USER}/workspace/build-highway/highway-1.2.0=/usr/src/highway-1.2.0-3ubuntu3 \
    -DHWY_BROKEN_EMU128=0 \
    -Wdate-time \
    -D_FORTIFY_SOURCE=3 \
    -Wl,-Bsymbolic-functions \
    -flto=auto \
    -ffat-lto-objects \
    -Wl,-z,relro \
    -Wl,-z,now     \
    -fPIE \
    -pie \
    -Wl,--dependency-file=CMakeFiles/hwy_benchmark.dir/link.d CMakeFiles/hwy_benchmark.dir/hwy/examples/benchmark.cc.o \
    -o examples/hwy_benchmark  \
    -Wl,-rpath,/home/${USER}/workspace/build-highway/highway-1.2.0/obj-riscv64-linux-gnu  libhwy.so.1.2.0

  during RTL pass: expand
  In function ‘BitCastToByte’,
      inlined from ‘BitCast’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:901:33,
      inlined from ‘Zero’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:695:17,
      inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:118:18,
      inlined from ‘operator()’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/examples/benchmark.cc:75:61,
      inlined from ‘CallClosure’ at /usr/src/highway-1.2.0-3ubuntu3/hwy/nanobenchmark.h:154:14:
  /usr/src/highway-1.2.0-3ubuntu3/hwy/ops/rvv-inl.h:866:1: internal compiler error: in generate_insn, at config/riscv/riscv-vector-builtins.cc:4470
  0x243847d internal_error(char const*, ...)
  	../../src/gcc/diagnostic-global-context.cc:517
  0x5b67bf fancy_abort(char const*, int, char const*)
  	../../src/gcc/diagnostic.cc:1749
  0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4470
  0xdd60bf riscv_vector::function_expander::generate_insn(insn_code)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4468
  0xdde4fd riscv_vector::function_expander::expand()
  	../../src/gcc/config/riscv/riscv-vector-builtins.h:688
  0xdde4fd riscv_vector::expand_builtin(unsigned int, tree_node*, rtx_def*)
  	../../src/gcc/config/riscv/riscv-vector-builtins.cc:4990
  0x72cb91 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
  	../../src/gcc/expr.cc:12499
  0x733497 store_expr(tree_node*, rtx_def*, int, bool, bool)
  	../../src/gcc/expr.cc:6771
  0x734575 expand_assignment(tree_node*, tree_node*, bool)
  	../../src/gcc/expr.cc:6492
  0x647a85 expand_call_stmt
  	../../src/gcc/cfgexpand.cc:3143
  0x647a85 expand_gimple_stmt_1
  	../../src/gcc/cfgexpand.cc:4218
  0x647a85 expand_gimple_stmt
  	../../src/gcc/cfgexpand.cc:4365
  0x64bce3 expand_gimple_basic_block
  	../../src/gcc/cfgexpand.cc:6483
  0x64bce3 execute
  	../../src/gcc/cfgexpand.cc:7232
  Please submit a full bug report, with preprocessed source.
  Please include the complete backtrace with any bug report.
  See <file:///usr/share/doc/gcc-15/README.Bugs> for instructions.
  make: *** [/tmp/ccRMqIG3.mk:2: /tmp/ccG6RxKY.ltrans0.ltrans.o] Error 1
  lto-wrapper: fatal error: make returned 2 exit status
  compilation terminated.
  /usr/bin/ld: error: lto-wrapper failed
  collect2: error: ld returned 1 exit status
  --- 
  ProblemType: Bug
  ApportVersion: 2.33.1-0ubuntu2
  Architecture: riscv64
  CasperMD5CheckResult: skip
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 25.10
  InstallationDate: Installed on 2025-03-17 (161 days ago)
  InstallationMedia: Ubuntu-Server 25.04 "Plucky Puffin" - Daily riscv64 (20250316)
  Package: highway
  PackageArchitecture: riscv64
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
  ProcVersionSignature: Ubuntu 6.14.0-22.22.1-generic 6.14.5
  Tags: questing
  Uname: Linux 6.14.0-22-generic riscv64
  UpgradeStatus: Upgraded to questing on 2025-05-17 (100 days ago)
  UserGroups: N/A
  _MarkForUpload: True

To manage notifications about this bug go to:
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Follow ups

[Bug 2121375] Re: FTBFS with GCC 15.2
From: Heinrich Schuchardt, 2025-08-26
[Bug 2121375] Re: FTBFS with GCC 15.2
From: Heinrich Schuchardt, 2025-08-25
[Bug 2121375] Re: FTBFS with GCC 15.2
From: Heinrich Schuchardt, 2025-08-25
[Bug 2121375] ProcCpuinfoMinimal.txt
From: Heinrich Schuchardt, 2025-08-25
[Bug 2121375] Dependencies.txt
From: Heinrich Schuchardt, 2025-08-25