--- clang-14.log	2022-11-02 22:36:12.608765143 +1100
+++ clang-15.log	2022-11-02 22:36:12.609765140 +1100
@@ -1,20 +1,20 @@
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0
 Candidate multilib: .;@m64
 Candidate multilib: 32;@m32
 Selected multilib: .;@m64
-clang-15: error: unsupported option '-V -o'
-clang-15: error: no such file or directory: 'garbage'
-clang-15: error: no input files
-clang-15: error: unknown argument '-qversion'; did you mean '--version'?
-clang-15: error: no input files
+clang-14: error: unsupported option '-V -o'
+clang-14: error: no such file or directory: 'garbage2'
+clang-14: error: no input files
+clang-14: error: unknown argument '-qversion'; did you mean '--version'?
+clang-14: error: no input files
 
 
 
@@ -29,18 +29,18 @@
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0
 Candidate multilib: .;@m64
 Candidate multilib: 32;@m32
 Selected multilib: .;@m64
-clang-15: error: unsupported option '-V -o'
-clang-15: error: unknown argument '-qversion'; did you mean '--version'?
-clang-15: error: no input files
+clang-14: error: unsupported option '-V -o'
+clang-14: error: unknown argument '-qversion'; did you mean '--version'?
+clang-14: error: no input files
 
 
 /usr/bin/x86_64-pc-linux-gnu-ld
@@ -77,20 +77,20 @@
 
 
 
-clang-15: error: unsupported option '-V -o'
+clang-14: error: unsupported option '-V -o'
 
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0
 Candidate multilib: .;@m64
 Candidate multilib: 32;@m32
 Selected multilib: .;@m64
- "/usr/bin/x86_64-pc-linux-gnu-ld" --eh-frame-hdr -m elf_x86_64 -shared -o garbage /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtbeginS.o -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib -L/lib -L/usr/lib conftest.o -soname conftest -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crtn.o
-programs: =/usr/lib/llvm/15/bin:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/bin
-libraries: =/usr/lib/llvm/15/bin/../../../../lib/clang/14.ignoreme:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64:/lib/../lib64:/usr/lib/../lib64:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib:/lib:/usr/lib
-clang-15: error: unsupported option '-print-multi-os-directory'
+ "/usr/bin/x86_64-pc-linux-gnu-ld" --eh-frame-hdr -m elf_x86_64 -shared -o garbage2 /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtbeginS.o -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib -L/lib -L/usr/lib conftest.o -soname conftest -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crtn.o
+programs: =/usr/lib/llvm/14/bin:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/bin
+libraries: =/usr/lib/llvm/14/bin/../../../../lib/clang/14.ignoreme:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64:/lib/../lib64:/usr/lib/../lib64:/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib:/lib:/usr/lib
+clang-14: error: unsupported option '-print-multi-os-directory'
 
 
 conftest.cpp:26:10: fatal error: 'ac_nonexistent.h' file not found
@@ -104,17 +104,17 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld
 /usr/bin/x86_64-pc-linux-gnu-ld
-clang-15: error: unsupported option '-V -o'
+clang-14: error: unsupported option '-V -o'
 
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0
 Candidate multilib: .;@m64
 Candidate multilib: 32;@m32
 Selected multilib: .;@m64
- "/usr/bin/x86_64-pc-linux-gnu-ld" --eh-frame-hdr -m elf_x86_64 -shared -o garbage /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtbeginS.o -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib -L/lib -L/usr/lib conftest.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crtn.o
+ "/usr/bin/x86_64-pc-linux-gnu-ld" --eh-frame-hdr -m elf_x86_64 -shared -o garbage2 /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtbeginS.o -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../x86_64-pc-linux-gnu/lib -L/lib -L/usr/lib conftest.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/crtendS.o /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0/../../../../lib64/crtn.o
 
 
 
@@ -122,7 +122,7 @@
 clang version 14.ignoreme
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
+InstalledDir: /usr/lib/llvm/14/bin
 Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/11.3.0
 Candidate multilib: .;@m64
 Candidate multilib: 32;@m32
@@ -175,11 +175,11 @@
 2 warnings generated.
 
 
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
 main ()
      ^
       void
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
 main ()
      ^
       void
@@ -191,21 +191,23 @@
 main ()
      ^
       void
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
 main ()
      ^
       void
 ignoreme: error: call to undeclared function 'pthread_setname_np'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
 pthread_setname_np("thread-name")
 ^
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+2 errors generated.
+ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
 main ()
      ^
       void
 ignoreme: error: call to undeclared function 'pthread_setname_np'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
 pthread_setname_np(pthread_self(), "thread-name-%u", 0)
 ^
-ignoreme: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+2 errors generated.
+ignoreme: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
 main ()
      ^
       void