=> "/opt/pkg/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-upstream-trunk/sysutils/mtx", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
===> Building for mtx-1.3.12nb1
gcc -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -O6 -DVERSION="\"1.3.12\"" -I. -I.  -c -o mtx.o mtx.c
gcc -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -O6 -DVERSION="\"1.3.12\"" -I. -I.  -c -o mtxl.o mtxl.c
gcc -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -O6 -DVERSION="\"1.3.12\"" -I. -I.  -c -o tapeinfo.o tapeinfo.c
In file included from mtxl.c:29:
mtx.h:232:16: error: cannot use keyword 'false' as enumeration constant
  232 | typedef enum { false, true } boolean;
      |                ^~~~~
mtx.h:232:16: note: 'false' is a keyword with '-std=c23' onwards
In file included from mtx.c:39:
mtx.h:232:16: error: cannot use keyword 'false' as enumeration constant
  232 | typedef enum { false, true } boolean;
      |                ^~~~~
mtx.h:232:16: note: 'false' is a keyword with '-std=c23' onwards
In file included from tapeinfo.c:51:
mtx.h:232:16: error: cannot use keyword 'false' as enumeration constant
  232 | typedef enum { false, true } boolean;
      |                ^~~~~
mtx.h:232:16: note: 'false' is a keyword with '-std=c23' onwards
gmake: *** [<builtin>: mtxl.o] Error 1
gmake: *** Waiting for unfinished jobs....
gmake: *** [<builtin>: mtx.o] Error 1
gmake: *** [<builtin>: tapeinfo.o] Error 1
*** Error code 2

Stop.
bmake[1]: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/sysutils/mtx
*** Error code 1

Stop.
bmake: stopped making "all" in /data/jenkins/workspace/pkgsrc-upstream-trunk/sysutils/mtx