Snippets for gcc 15.3.0 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/rk8dl23hddc98swqfzb8ay5h6n2fkmjx-libgccjit-15.3.0.drv.

• ../../gcc-15.3.0/gcc/genhooks.cc:121:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    121 |       fscanf (f, "%999s", buf);
        |       ~~~~~~~^~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/genhooks.cc:112:17: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    112 |   while (fscanf (f, "%*[^@]"), buf[0] = '\0',
        |          ~~~~~~~^~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/genhooks.cc:174:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    174 |       fscanf (f, "%5[^ \n]", buf);
        |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/genhooks.cc:180:14: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    180 |       fscanf (f, "%999s", buf);
        |       ~~~~~~~^~~~~~~~~~~~~~~~~
  

• gengtype-lex.cc:356:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
  

• ../../gcc-15.3.0/gcc/expmed.cc:1864:45: warning: '*(unsigned int*)((char*)&imode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))' may be used uninitialized [-Wmaybe-uninitialized]
   1864 |       rtx sub = extract_bit_field_as_subreg (mode1, op0, imode,
        |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
   1865 |                                              bitsize, bitnum);
        |                                              ~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/text-art/style.cc:150:25: warning: spurious leading punctuation sequence ';' in format [-Wformat-diag]
    150 |         pp_printf (pp, ";5;%i", (int)u.m_8bit);
        |                         ^
  

• ../../gcc-15.3.0/gcc/text-art/style.cc:160:25: warning: spurious leading punctuation sequence ';' in format [-Wformat-diag]
    160 |         pp_printf (pp, ";2;%i;%i;%i",
        |                         ^
  

• ./options.h:7073:37: warning: narrowing conversion of 'global_options.gcc_options::x_flag_openacc' from 'int' to 'bool' [-Wnarrowing]
   7073 | #define flag_openacc global_options.x_flag_openacc
        |                      ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
  

• ./options.h:7085:36: warning: narrowing conversion of 'global_options.gcc_options::x_flag_openmp' from 'int' to 'bool' [-Wnarrowing]
   7085 | #define flag_openmp global_options.x_flag_openmp
        |                     ~~~~~~~~~~~~~~~^~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/gcc.cc:10706:12: warning: ignoring return value of 'ssize_t read(int, void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
  

• ../../gcc-15.3.0/gcc/gcc.cc:7938:9: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   7938 |   write (fd, "\n//", 3);
        |   ~~~~~~^~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/gcc.cc:7941:13: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   7941 |       write (fd, " ", 1);
        |       ~~~~~~^~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/gcc.cc:7942:13: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   7942 |       write (fd, new_argv[i], strlen (new_argv[i]));
        |       ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/gcc.cc:7944:9: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   7944 |   write (fd, "\n\n", 2);
        |   ~~~~~~^~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/gcc.cc:9325:13: warning: ignoring return value of 'int truncate(const char*, __off_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   9325 |     truncate(totruncate_file, 0);
        |     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/gcc/../libgcc/libgcov-util.c:456:9: warning: ignoring return value of 'int chdir(const char*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    456 |   chdir (pwd);
        |   ~~~~~~^~~~~
  

• ../../gcc-15.3.0/gcc/lto-wrapper.cc:1172:8: warning: ignoring return value of 'ssize_t read(int, void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   1172 |   read (fd, data, length);
        |   ~~~~~^~~~~~~~~~~~~~~~~~
  

• ../../gcc-15.3.0/c++tools/server.cc:620:10: warning: ignoring return value of 'int pipe(int*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    620 |     pipe (term_pipe);
        |     ~~~~~^~~~~~~~~~~
  

• ../../gcc-15.3.0/c++tools/server.cc:490:11: warning: ignoring return value of 'ssize_t write(int, const void*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
    490 |     write (term_pipe[1], &term_pipe[1], 1);
        |     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~