[sr #111150] m4-1.4.19 fails to build with -std=gnu23 (new GCC 15 default)

[Sam James]

URL:
  <https://savannah.gnu.org/support/?111150>

                 Summary: m4-1.4.19 fails to build with -std=gnu23 (new GCC 15
default)
                   Group: GNU M4
               Submitter: thesamesam
               Submitted: Sat 16 Nov 2024 09:32:58 PM UTC
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email:
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: None


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Follow-up Comments:


-------------------------------------------------------
Date: Sat 16 Nov 2024 09:32:58 PM UTC By: Sam James <thesamesam>
m4-1.4.19 fails to build with GCC 15 trunk which now defaults to -std=gnu23:
```

x86_64-pc-linux-gnu-gcc  -I.     -O3 -march=native -mtls-dialect=gnu2
-flto=jobserver -fno-semantic-interposition -pipe -fcf-protection=none
-fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches
-fdiagnostics-details -Wa,-O2 -Wa,-mtune=znver2 -Warray-bounds
-Wstrict-aliasing -Wfree-nonheap-object -Wuninitialized -Wmaybe-uninitialized
-Wreturn-type -Werror=lto-type-mismatch -Werror=strict-aliasing -Werror=odr
-Warray-bounds -fdiagnostics-details -Wstringop-overread -Wstringop-overflow
-Wstringop-truncation -Wbuiltin-declaration-mismatch -ggdb3 -Wformat
-Werror=format-security -c -o gl_avltree_oset.o gl_avltree_oset.c
In file included from gl_avltree_oset.h:21,
                 from gl_avltree_oset.c:21:
gl_oset.h:275:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  275 | GL_OSET_INLINE _GL_ATTRIBUTE_NODISCARD int
      | ^~~~~~~~~~~~~~
gl_oset.h:275:40: error: expected identifier or '(' before 'int'
  275 | GL_OSET_INLINE _GL_ATTRIBUTE_NODISCARD int
      |                                        ^~~
In file included from clean-temp-private.h:22,
                 from clean-temp-simple.c:22:
gl_list.h:633:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      | ^~~~~~~~~~~~~~
gl_list.h:633:40: error: expected identifier or '(' before 'int'
  633 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD int
      |                                        ^~~
gl_list.h:688:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:688:40: error: expected identifier or '(' before 'gl_list_node_t'
  688 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:695:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:695:40: error: expected identifier or '(' before 'gl_list_node_t'
  695 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:701:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
gl_list.h:701:40: error: expected identifier or '(' before 'gl_list_node_t'
  701 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      |                                        ^~~~~~~~~~~~~~
gl_list.h:755:1: warning: 'nodiscard' attribute ignored [-Wattributes]
  755 | GL_LIST_INLINE _GL_ATTRIBUTE_NODISCARD gl_list_node_t
      | ^~~~~~~~~~~~~~
[...]
````

The issue is redefinition of bool at least.







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