So apparently, some platforms don't have ffsll(3).

The manpage lies; it says that the function is in POSIX, but that's only for
ffs(3), not ffsll(3).


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@232164 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 227579 .
+# From configure.ac Revision: 227580 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.6.
 #
@@ -16715,7 +16715,8 @@ done
 
 
 
-for ac_func in asprintf atexit closefrom dup2 eaccess endpwent euidaccess ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap ntohll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl
+
+for ac_func in asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap ntohll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
 { echo "$as_me:$LINENO: checking for $ac_func" >&5

configure.ac

@@ -390,7 +390,7 @@ AC_FUNC_STRNLEN
 AC_FUNC_STRTOD
 AC_FUNC_UTIME_NULL
 AC_FUNC_VPRINTF
-AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap ntohll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl])
+AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap ntohll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl])
 
 # NOTE: we use AC_CHECK_LIB to get -lm into the arguments for later checks,
 # so that AC_CHECK_FUNCS can detect functions in that library.

include/asterisk/autoconfig.h.in

@@ -232,6 +232,9 @@
 /* Define to the version of the Ffmpeg and avcodec library library. */
 #undef HAVE_FFMPEG_VERSION
 
+/* Define to 1 if you have the `ffsll' function. */
+#undef HAVE_FFSLL
+
 /* Define to 1 if you have the `floor' function. */
 #undef HAVE_FLOOR
 

include/asterisk/compat.h

@@ -77,6 +77,10 @@
 int __attribute__((format(printf, 2, 3))) asprintf(char **str, const char *fmt, ...);
 #endif
 
+#ifndef HAVE_FFSLL
+int ffsll(long long n);
+#endif
+
 #ifndef HAVE_GETLOADAVG
 int getloadavg(double *list, int nelem);
 #endif

main/strcompat.c

@@ -386,3 +386,16 @@ uint64_t htonll(uint64_t host64)
 }
 #endif
 
+#ifndef HAVE_FFSLL
+int ffsll(long long n)
+{
+	int i;
+	for (i = 0; i < 64; i++) {
+		if ((1LL << i) & n) {
+			return i + 1;
+		}
+	}
+	return 0;
+}
+#endif
+