--- clang-14.log	2022-11-02 22:36:13.716761558 +1100
+++ clang-15.log	2022-11-02 22:36:13.716761558 +1100
@@ -1,22 +1,22 @@
-clang version 15.0.1
+clang version 14.0.1
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
-clang version 15.0.1
+InstalledDir: /usr/lib/llvm/14/bin
+clang version 14.0.1
 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-15: error: unknown argument '-version'; 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
+clang-14: error: unknown argument '-version'; did you mean '--version'?
+clang-14: error: no input files
 
 
 
@@ -37,23 +37,23 @@
 
 
 
-clang version 15.0.1
+clang version 14.0.1
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
-clang version 15.0.1
+InstalledDir: /usr/lib/llvm/14/bin
+clang version 14.0.1
 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-15: error: unknown argument '-version'; 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
+clang-14: error: unknown argument '-version'; did you mean '--version'?
+clang-14: error: no input files
 
 
 
@@ -173,10 +173,10 @@
      ^
 ignoreme: note: 'sin' is a builtin with type 'double (double)'
 /usr/bin/x86_64-pc-linux-gnu-ld: cannot find -lsunmath: No such file or directory
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 /usr/bin/x86_64-pc-linux-gnu-ld: cannot find -lproc: No such file or directory
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 ignoreme: error: expected expression
 if (sizeof ((size_t)))
@@ -230,10 +230,10 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `fpsetprec'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `issetugid'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 
 
@@ -242,7 +242,7 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `crypt'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 
 
@@ -382,7 +382,7 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `dbm_open'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 ignoreme: fatal error: 'dbm.h' file not found
 #include <dbm.h>
@@ -390,7 +390,7 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `dbminit'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 
 ignoreme: warning: unused variable 'r' [-Wunused-variable]
@@ -399,33 +399,33 @@
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `mbedtls_ctr_drbg_init'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `mbedtls_x509_crt_init'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
 /usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-scheme/gauche-0.9.12/temp/conftest.o: in function `main':
 conftest.c:(.text+0x4): undefined reference to `mbedtls_ssl_init'
-clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
+clang-14: error: linker command failed with exit code 1 (use -v to see invocation)
 
-clang version 15.0.1
+clang version 14.0.1
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
-clang version 15.0.1
+InstalledDir: /usr/lib/llvm/14/bin
+clang version 14.0.1
 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
 
 
 
@@ -438,21 +438,21 @@
 
 
 
-clang version 15.0.1
+clang version 14.0.1
 Target: x86_64-pc-linux-gnu
 Thread model: posix
-InstalledDir: /usr/lib/llvm/15/bin
-clang version 15.0.1
+InstalledDir: /usr/lib/llvm/14/bin
+clang version 14.0.1
 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
 
 
 
@@ -491,20 +491,20 @@
 
 
 
-clang-15: error: unsupported option '-V -o'
+clang-14: error: unsupported option '-V -o'
 
-clang version 15.0.1
+clang version 14.0.1
 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/15.0.1:/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/14.0.1:/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
@@ -518,17 +518,17 @@
 
 /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 15.0.1
+clang version 14.0.1
 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
 
 
 
@@ -579,7 +579,7 @@
 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