* addr2line.c (main_exe_path): support OpenBSD via getexecpath()

Merged: https://github.com/ruby/ruby/pull/18801

addr2line.c

@@ -2608,6 +2608,15 @@ main_exe_path(FILE *errout)
     len--; /* sysctl sets strlen+1 */
     return len;
 }
+#elif defined(__OpenBSD__) && defined(HAVE_GETEXECPATH)
+static ssize_t
+main_exe_path(FILE *errout)
+{
+    if (getexecpath(binary_filename, PATH_MAX) == -1)
+        return 0;
+
+    return strlen(binary_filename);
+}
 #elif defined(HAVE_LIBPROC_H)
 static ssize_t
 main_exe_path(FILE *errout)

configure.ac

@@ -3280,7 +3280,10 @@ AS_CASE(["$target_os"],
     AS_IF([test "x$ac_cv_lib_procstat_procstat_open_sysctl" = xyes], [
 	AC_CHECK_FUNCS(procstat_getvmmap)
     ])
-    ])
+],
+[openbsd*], [
+    AC_CHECK_FUNCS([getexecpath])
+])
 AS_CASE(["$target_cpu-$target_os"],
 [*-darwin*], [
     AC_CHECK_HEADERS([libproc.h])