[Bug 282563] stable/14 build with clang19

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282563

            Bug ID: 282563
           Summary: stable/14 build with clang19
           Product: Base System
           Version: 14.2-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: jordan@ostreff.info

Current stable/14 source can't be build if you have following environment:
CC=clang19
CXX=clang++19
CPP=clang-cpp19

Here is short output:

--------------------------------------------------------------
>>> stage 4.3.1: building lib32 shim libraries
--------------------------------------------------------------
mtree -deUW -f /usr/src/etc/mtree/BSD.lib32.dist  -p
/usr/obj/usr/src/amd64.amd64/tmp/usr >/dev/null
mtree -deUW -f /usr/src/etc/mtree/BSD.lib32.dist  -p
/usr/obj/usr/src/amd64.amd64/tmp/usr/lib/debug/usr >/dev/null
cd /usr/src;  WORLDTMP=/usr/obj/usr/src/amd64.amd64/tmp  MAKEFLAGS="-m
/usr/src/tools/build/mk  -m /usr/src/share/mk"  make -f Makefile.inc1  DESTDIR=
 OBJTOP=/usr/obj/usr/src/amd64.amd64/obj-lib32  OBJROOT='${OBJTOP}/' 
UNIVERSE_TOOLCHAIN_PATH=  MAKEOBJDIRPREFIX=  -DNO_LINT  -DNO_CPU_CFLAGS 
MK_ASAN=no  MK_CTF=no  MK_RETPOLINE=no  MK_SSP=no  MK_UBSAN=no  MK_WERROR=no 
_lc_build-tools
cd /usr/src/lib/ncurses/tinfo; make DIRPRFX=lib/ncurses/tinfo/ build-tools
cd /usr/src/lib/libmagic; make DIRPRFX=lib/libmagic/ build-tools
clang19 -O2 -pipe -fno-common -DMAGIC='"/usr/share/misc/magic"' -DHAVE_CONFIG_H
-I/usr/src/lib/libmagic -I/usr/obj/usr/src/amd64.amd64/obj-lib32/lib/libmagic
-I/usr/src/contrib/file/src  -DNDEBUG -g -gz=zlib -MD  -MF.depend.mkmagic
-MTmkmagic -std=gnu99 -Wno-format-zero-length -Wsystem-headers -Wall
-Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Wno-uninitialized -Wno-pointer-sign
-Wdate-time -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable
-Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
-Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef
-Wno-address-of-packed-member  -Qunused-arguments   
-I/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/include -DCOMPILE_ONLY 
-Wl,-zrelro   -L/usr/obj/usr/src/amd64.amd64/tmp/legacy/usr/lib -o mkmagic 
/usr/src/contrib/file/src/apprentice.c /usr/src/contrib/file/src/cdf_time.c
/usr/src/contrib/file/src/encoding.c /usr/src/contrib/file/src/funcs.c
/usr/src/contrib/file/src/magic.c /usr/src/contrib/file/src/print.c  -legacy
/bin/sh: clang19: not found
*** Error code 127

Stop.
make[3]: stopped in /usr/src/lib/libmagic
*** Error code 1

Stop.
make[2]: stopped in /usr/src
*** Error code 1

Stop.
make[1]: stopped in /usr/src
*** Error code 1

Stop.
make: stopped in /usr/src



root@classic:/usr/src # clang19 -v
clang version 19.1.3 (https://git.freebsd.org/ports.git
a34c378a051d3df7767855bb37fc359924f4dcc1)
Target: x86_64-portbld-freebsd14.2
Thread model: posix
InstalledDir: /usr/local/llvm19/bin

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