[Bug libgcc/109286] New: Assembler warnings about .init/.fini sections defined without attributes

[Bug libgcc/109286] New: Assembler warnings about .init/.fini sections defined without attributes

[jdx at o2 dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109286

            Bug ID: 109286
           Summary: Assembler warnings about .init/.fini sections defined
                    without attributes
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: inline-asm, internal-improvement
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jdx at o2 dot pl
  Target Milestone: ---
              Host: x86_64-w64-mingw32
            Target: h8300-elf

Created attachment 54757
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54757&action=edit
crtbegin.S

For every possible libgcc variant (H8/300H, H8S, etc) I get following warnings:

/d/Works/xcomp/gcc-build/./gcc/xgcc -B/d/Works/xcomp/gcc-build/./gcc/
-B/usr/local/h8300-elf/bin/ -B/usr/local/h8300-elf/lib/ -isystem
/usr/local/h8300-elf/include -isystem /usr/local/h8300-elf/sys-include   
-isystem /d/Works/xcomp/sysroot/h8300-elf/include -ms -O2 -isystem
/d/Works/xcomp/sysroot/h8300-elf/include -DIN_GCC -fPIC
-DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition 
-isystem ./include  -I. -I. -I../../.././gcc -I../../../../../gcc/libgcc
-I../../../../../gcc/libgcc/. -I../../../../../gcc/libgcc/../gcc
-I../../../../../gcc/libgcc/../include   -g0  -finhibit-size-directive
-fno-inline -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder
-fno-tree-vectorize -fbuilding-libgcc -fno-stack-protector  -Dinhibit_libc  -I.
-I. -I../../.././gcc -I../../../../../gcc/libgcc -I../../../../../gcc/libgcc/.
-I../../../../../gcc/libgcc/../gcc -I../../../../../gcc/libgcc/../include  -o
crtbegin.o -MT crtbegin.o -MD -MP -MF crtbegin.dep  -c
../../../../../gcc/libgcc/crtstuff.c -DCRT_BEGIN
R:\Users\jdx\AppData\Local\Temp\ccvtc9ju.s: Assembler messages:
R:\Users\jdx\AppData\Local\Temp\ccvtc9ju.s:101: Warning: new section '.fini'
defined without attributes - this might cause problems
R:\Users\jdx\AppData\Local\Temp\ccvtc9ju.s:124: Warning: new section '.init'
defined without attributes - this might cause problems
/d/Works/xcomp/gcc-build/./gcc/xgcc -B/d/Works/xcomp/gcc-build/./gcc/
-B/usr/local/h8300-elf/bin/ -B/usr/local/h8300-elf/lib/ -isystem
/usr/local/h8300-elf/include -isystem /usr/local/h8300-elf/sys-include   
-isystem /d/Works/xcomp/sysroot/h8300-elf/include -ms -O2 -isystem
/d/Works/xcomp/sysroot/h8300-elf/include -DIN_GCC -fPIC
-DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition 
-isystem ./include  -I. -I. -I../../.././gcc -I../../../../../gcc/libgcc
-I../../../../../gcc/libgcc/. -I../../../../../gcc/libgcc/../gcc
-I../../../../../gcc/libgcc/../include   -g0  -finhibit-size-directive
-fno-inline -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder
-fno-tree-vectorize -fbuilding-libgcc -fno-stack-protector  -Dinhibit_libc  -I.
-I. -I../../.././gcc -I../../../../../gcc/libgcc -I../../../../../gcc/libgcc/.
-I../../../../../gcc/libgcc/../gcc -I../../../../../gcc/libgcc/../include  -o
crtend.o -MT crtend.o -MD -MP -MF crtend.dep  -c
../../../../../gcc/libgcc/crtstuff.c -DCRT_END
R:\Users\jdx\AppData\Local\Temp\ccbb20TH.s: Assembler messages:
R:\Users\jdx\AppData\Local\Temp\ccbb20TH.s:48: Warning: new section '.init'
defined without attributes - this might cause problems

In the attachement there are crtbegin.S and crtend.S created "manually" with 

/d/Works/xcomp/gcc-build/./gcc/xgcc -B/d/Works/xcomp/gcc-build/./gcc/
-B/usr/local/h8300-elf/bin/ -B/usr/local/h8300-elf/lib/ -isystem
/usr/local/h8300-elf/include -isystem /usr/local/h8300-elf/sys-include   
-isystem /d/Works/xcomp/sysroot/h8300-elf/include -ms -O2 -isystem
/d/Works/xcomp/sysroot/h8300-elf/include -DIN_GCC -fPIC
-DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition 
-isystem ./include  -I. -I. -I../../.././gcc -I../../../../../gcc/libgcc
-I../../../../../gcc/libgcc/. -I../../../../../gcc/libgcc/../gcc
-I../../../../../gcc/libgcc/../include   -g0  -finhibit-size-directive
-fno-inline -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder
-fno-tree-vectorize -fbuilding-libgcc -fno-stack-protector  -Dinhibit_libc  -I.
-I. -I../../.././gcc -I../../../../../gcc/libgcc -I../../../../../gcc/libgcc/.
-I../../../../../gcc/libgcc/../gcc -I../../../../../gcc/libgcc/../include  -S
-o crtbegin.S -MT crtbegin.o -MD -MP -MF crtbegin.dep
../../../../../gcc/libgcc/crtstuff.c -DCRT_BEGIN

and

/d/Works/xcomp/gcc-build/./gcc/xgcc -B/d/Works/xcomp/gcc-build/./gcc/
-B/usr/local/h8300-elf/bin/ -B/usr/local/h8300-elf/lib/ -isystem
/usr/local/h8300-elf/include -isystem /usr/local/h8300-elf/sys-include   
-isystem /d/Works/xcomp/sysroot/h8300-elf/include -ms -O2 -isystem
/d/Works/xcomp/sysroot/h8300-elf/include -DIN_GCC -fPIC
-DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition 
-isystem ./include  -I. -I. -I../../.././gcc -I../../../../../gcc/libgcc
-I../../../../../gcc/libgcc/. -I../../../../../gcc/libgcc/../gcc
-I../../../../../gcc/libgcc/../include   -g0  -finhibit-size-directive
-fno-inline -fno-exceptions -fno-zero-initialized-in-bss -fno-toplevel-reorder
-fno-tree-vectorize -fbuilding-libgcc -fno-stack-protector  -Dinhibit_libc  -I.
-I. -I../../.././gcc -I../../../../../gcc/libgcc -I../../../../../gcc/libgcc/.
-I../../../../../gcc/libgcc/../gcc -I../../../../../gcc/libgcc/../include  -S
-o crtend.S -MT crtend.o -MD -MP -MF crtend.dep
../../../../../gcc/libgcc/crtstuff.c -DCRT_END

[Bug libgcc/109286] Assembler warnings about .init/.fini sections defined without attributes

[jdx at o2 dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109286

--- Comment #1 from Jan Dubiec <jdx at o2 dot pl> ---
Created attachment 54758
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54758&action=edit
crtend.S

[Bug libgcc/109286] Assembler warnings about .init/.fini sections defined without attributes

[jdx at o2 dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109286

--- Comment #2 from Jan Dubiec <jdx at o2 dot pl> ---
$ h8300-elf-as --version
GNU assembler (GNU Toolchain for Renesas H8 Family [Built by jdx]) 2.40
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `h8300-elf'.

[Bug target/109286] Assembler warnings about .init/.fini sections defined without attributes

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109286

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-03-26
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
crtstuff.c:
CRT_CALL_STATIC_FUNCTION (__LIBGCC_INIT_SECTION_ASM_OP__, frame_dummy)


Then from c-family/c-cppbuiltin.cc:
#ifdef INIT_SECTION_ASM_OP
      builtin_define_with_value ("__LIBGCC_INIT_SECTION_ASM_OP__",
                                 INIT_SECTION_ASM_OP, 1);
#endif


From config/elfos.h:
#define INIT_SECTION_ASM_OP     "\t.section\t.init"
#define FINI_SECTION_ASM_OP     "\t.section\t.fini"


Most other targets include initfini-array.h which does:
initfini-array.h:#undef INIT_SECTION_ASM_OP

or they do:
frv/frv.h:#define INIT_SECTION_ASM_OP   "\t.section .init,\"ax\""
microblaze/microblaze.h:#define INIT_SECTION_ASM_OP    
"\t.section\t.init,\"ax\""
rs6000/sysv4.h:#define  INIT_SECTION_ASM_OP "\t.section\t\".init\",\"ax\""


h8300 could do the same ...