perf env: Move arch errno function to only use in env

Move arch_syscalls__strerrno_function out of builtin-trace.c to env.c
so that there isn't a util to builtin function call. This allows the
python.c stub to be removed. Also, remove declaration/prototype from
env.h and make static to reduce scope. The include is moved inside
ifdefs to avoid, "defined but unused warnings".

Signed-off-by: Ian Rogers <[e-mail]>
Acked-by: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Athira Rajeev <[e-mail]>
Cc: Colin Ian King <[e-mail]>
Cc: Dapeng Mi <[e-mail]>
Cc: Howard Chu <[e-mail]>
Cc: Ilya Leoshkevich <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Josh Poimboeuf <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Michael Petlan <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Richter <[e-mail]>
Cc: Veronika Molnarova <[e-mail]>
Cc: Weilin Wang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
perf: perf python: Correctly throw IndexError
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/builtin-trace.c

···
 	    .strtoul	= STUL_STRARRAY_FLAGS, \
 	    .parm	= &strarray__##array, }
 
-#include "trace/beauty/arch_errno_names.c"
 #include "trace/beauty/eventfd.c"
 #include "trace/beauty/futex_op.c"
 #include "trace/beauty/futex_val3.c"

tools/perf/trace/beauty/arch_errno_names.sh

···
 	archlist="$1"
 	default="$2"
 
-	printf 'arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch)\n'
+	printf 'static arch_syscalls__strerrno_t *\n'
+	printf 'arch_syscalls__strerrno_function(const char *arch)\n'
 	printf '{\n'
 	for arch in $archlist; do
 		arch_str=$(arch_string "$arch")

tools/perf/util/env.c

···
 	return normalize_arch(arch_name);
 }
 
+#if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
+#include "trace/beauty/arch_errno_names.c"
+#endif
+
 const char *perf_env__arch_strerrno(struct perf_env *env __maybe_unused, int err __maybe_unused)
 {
 #if defined(HAVE_SYSCALL_TABLE_SUPPORT) && defined(HAVE_LIBTRACEEVENT)

tools/perf/util/env.h

···
 
 typedef const char *(arch_syscalls__strerrno_t)(int err);
 
-arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch);
-
 struct perf_env {
 	char			*hostname;
 	char			*os_release;

tools/perf/util/python.c

···
 #include "thread_map.h"
 #include "trace-event.h"
 #include "mmap.h"
-#include "util/env.h"
 #include "util/kwork.h"
 #include "util/sample.h"
 #include "util/lock-contention.h"
···
 
 /* The following are stubs to avoid dragging in builtin-* objects. */
 /* TODO: move the code out of the builtin-* file into util. */
-
-arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch __maybe_unused)
-{
-	return NULL;
-}
 
 struct kwork_work *perf_kwork_add_work(struct perf_kwork *kwork __maybe_unused,
 				       struct kwork_class *class __maybe_unused,