[ruby-core:123300] [Ruby Bug#21611] Ruby 3.4.6 can't be built with GCC 15.2.1

["mame (Yusuke Endoh) via ruby-core" <ruby-core@ml.ruby-lang.org>]

Issue #21611 has been updated by mame (Yusuke Endoh).


Please do not omit the error log.

----------------------------------------
Bug #21611: Ruby 3.4.6 can't be built with GCC 15.2.1
https://bugs.ruby-lang.org/issues/21611#change-114666

* Author: watson1978 (Shizuo Fujita)
* Status: Open
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
Arch Linux provides GCC 15.2.1.
https://archlinux.org/packages/core/x86_64/gcc/

When I build Ruby 3.4.6 with GCC 15.2.1, it cause error:

### How to Reproduce
Here is a Dockerfile to reproduce the error:

```
FROM archlinux:latest

RUN pacman -Syu --noconfirm
RUN pacman -S --noconfirm curl base-devel libffi zlib openssl readline libyaml
RUN curl -O https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.6.tar.gz
RUN tar -xvzf ruby-3.4.6.tar.gz
RUN cd ruby-3.4.6 && ./configure && make -j && make install
```

Then, run `docker build -t ruby . --platform=linux/amd64` command to reproduce the error.

```
$ docker build -t ruby . --platform=linux/amd64
[+] Building 362.6s (9/9) FINISHED                                                                                     docker:desktop-linux
 => [internal] load build definition from Dockerfile                                                                                   0.0s
 => => transferring dockerfile: 332B                                                                                                   0.0s
 => [internal] load metadata for docker.io/library/archlinux:latest                                                                    0.3s
 => [internal] load .dockerignore                                                                                                      0.0s
 => => transferring context: 2B                                                                                                        0.0s
 => [1/6] FROM docker.io/library/archlinux:latest@sha256:8fe9851fcd8bd23ea0e6bfa99483d8778e40b45e0fd7bb8188c94cbdd8c25a38              0.0s
 => => resolve docker.io/library/archlinux:latest@sha256:8fe9851fcd8bd23ea0e6bfa99483d8778e40b45e0fd7bb8188c94cbdd8c25a38              0.0s
 => CACHED [2/6] RUN pacman -Syu --noconfirm                                                                                           0.0s
 => [3/6] RUN pacman -S --noconfirm curl base-devel libffi zlib openssl readline libyaml                                              24.4s
 => [4/6] RUN curl -O https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.6.tar.gz                                                       1.2s
 => [5/6] RUN tar -xvzf ruby-3.4.6.tar.gz                                                                                              1.1s
 => ERROR [6/6] RUN cd ruby-3.4.6 && ./configure && make -j && make install                                                          335.5s
------
 > [6/6] RUN cd ruby-3.4.6 && ./configure && make -j && make install:
0.765 checking for ruby... false
0.888 checking build system type... x86_64-pc-linux-gnu
1.452 checking host system type... x86_64-pc-linux-gnu
1.452 checking target system type... x86_64-pc-linux-gnu

...

288.3 compiling enc/ascii.c
300.8 gcc: fatal error: Killed signal terminated program cc1
301.1 compilation terminated.
301.2 gcc: fatal error: Killed signal terminated program cc1
301.2 compilation terminated.
301.5 make: *** [Makefile:489: complex.o] Error 1
301.5 In file included from ./include/ruby/internal/assume.h:29,
301.5                  from ./include/ruby/backward/2/assume.h:24,
301.5                  from ./include/ruby/defines.h:72,
301.5                  from ./include/ruby/ruby.h:25,
301.5                  from ./include/ruby/encoding.h:19,
301.5                  from encindex.h:14,
301.5                  from compile.c:19:
301.5 compile.c: In function ‘ibf_load_catch_table’:
301.6 make: *** Waiting for unfinished jobs....
301.6 make: *** [Makefile:489: io.o] Error 1
301.7 compile.c:13163:39: warning: taking address of packed member of ‘struct iseq_catch_table’ may result in an unaligned pointer value [-Waddress-of-packed-member]
301.7 13163 |             RB_OBJ_WRITE(parent_iseq, &table->entries[i].iseq, catch_iseq);
301.7 ./include/ruby/internal/cast.h:31:29: note: in definition of macro ‘RBIMPL_CAST’
301.7    31 | # define RBIMPL_CAST(expr) (expr)
301.7       |                             ^~~~
301.7 compile.c:13163:13: note: in expansion of macro ‘RB_OBJ_WRITE’
301.7 13163 |             RB_OBJ_WRITE(parent_iseq, &table->entries[i].iseq, catch_iseq);
301.7       |             ^~~~~~~~~~~~
301.8 gcc: fatal error: Killed signal terminated program cc1
301.8 compilation terminated.
301.9 make: *** [Makefile:489: process.o] Error 1
309.6 gcc: fatal error: Killed signal terminated program cc1
309.6 compilation terminated.
309.6 make: *** [Makefile:489: vm.o] Error 1
313.7 gcc: fatal error: Killed signal terminated program cc1
313.7 compilation terminated.
313.7 make: *** [Makefile:489: string.o] Error 1
334.5 At top level:
334.5 cc1: note: unrecognized command-line option ‘-Wno-self-assign’ may have been intended to silence earlier diagnostics
334.5 cc1: note: unrecognized command-line option ‘-Wno-parentheses-equality’ may have been intended to silence earlier diagnostics
334.5 cc1: note: unrecognized command-line option ‘-Wno-constant-logical-operand’ may have been intended to silence earlier diagnostics
------
Dockerfile:7
--------------------
   5 |     RUN curl -O https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.6.tar.gz
   6 |     RUN tar -xvzf ruby-3.4.6.tar.gz
   7 | >>> RUN cd ruby-3.4.6 && ./configure && make -j && make install
   8 |
--------------------
ERROR: failed to build: failed to solve: ResourceExhausted: process "/bin/sh -c cd ruby-3.4.6 && ./configure && make -j && make install" did not complete successfully: cannot allocate memory
```



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