perl-WWW-Curl-4.17-35.fc40 fails to build in Fedora 40:

gcc -c  -I/usr/include -D_REENTRANT -D_GNU_SOURCE -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fwrapv -fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64   -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer   -DVERSION=\"4.17\" -DXS_VERSION=\"4.17\" -fPIC "-I/usr/lib64/perl5/CORE"   Curl.c
[...]
In file included from Curl.xs:570:
curlopt-constants.c: In function ‘constant’:
curlopt-constants.c:19:58: error: ‘return’ with no value, in function returning non-void [-Wreturn-mismatch]
   19 |             if (strEQ(name, "DID_MEMORY_FUNC_TYPEDEFS")) return CURL_DID_MEMORY_FUNC_TYPEDEFS;
      |                                                          ^~~~~~
curlopt-constants.c:2:1: note: declared here
    2 | constant(const char *name)
      | ^~~~~~~~

A difference between passing and failing build roots is at <https://koschei.fedoraproject.org/build/17078955>. This failure is probably triggered by upgrading gcc from 13.2.1-6.fc40 to 14.0.1-0.1.fc40.