==== do-reg ====
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/main.c
/home/src/regress/lib/libc/regex/main.c:128:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  128 | regress(in)
      | ^
/home/src/regress/lib/libc/regex/main.c:205:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  205 | try(f0, f1, f2, f3, f4, opts)
      | ^
/home/src/regress/lib/libc/regex/main.c:319:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  319 | options(type, s)
      | ^
/home/src/regress/lib/libc/regex/main.c:376:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  376 | opt(c, s)
      | ^
/home/src/regress/lib/libc/regex/main.c:388:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  388 | fixstr(p)
      | ^
/home/src/regress/lib/libc/regex/main.c:410:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  410 | check(str, sub, should)
      | ^
/home/src/regress/lib/libc/regex/main.c:489:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  489 | eprint(err)
      | ^
/home/src/regress/lib/libc/regex/main.c:505:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  505 | efind(name)
      | ^
8 warnings generated.
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/split.c
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/debug.c
/home/src/regress/lib/libc/regex/debug.c:21:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
   21 | regprint(r, d)
      | ^
/home/src/regress/lib/libc/regex/debug.c:57:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
   57 | s_print(g, d)
      | ^
/home/src/regress/lib/libc/regex/debug.c:198:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  198 | regchar(ch)
      | ^
3 warnings generated.
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/../../../../lib/libc/regex/regcomp.c
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/../../../../lib/libc/regex/regerror.c
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/../../../../lib/libc/regex/regexec.c
cc -O2 -pipe  -I/home/src/regress/lib/libc/regex/../../../../lib/libc/regex -DREDEBUG -DPOSIX_MISTAKE -D'DEF_WEAK(x)=asm("")' -g  -MD -MP  -c /home/src/regress/lib/libc/regex/../../../../lib/libc/regex/regfree.c
cc   -o re main.o split.o debug.o regcomp.o regerror.o regexec.o regfree.o 
./re < /home/src/regress/lib/libc/regex/tests

==== do-reg-long ====
./re -el < /home/src/regress/lib/libc/regex/tests

==== do-reg-backref ====
./re -er < /home/src/regress/lib/libc/regex/tests