| Austin Schuh | 745610d | 2015-09-06 18:19:50 -0700 | [diff] [blame] | 1 | # Check for support for nanosleep. It's defined in <time.h>, but on |
| 2 | # some systems, such as solaris, you need to link in a library to use it. |
| 3 | # We set acx_nanosleep_ok if nanosleep is supported; in that case, |
| 4 | # NANOSLEEP_LIBS is set to whatever libraries are needed to support |
| 5 | # nanosleep. |
| 6 | |
| 7 | AC_DEFUN([ACX_NANOSLEEP], |
| 8 | [AC_MSG_CHECKING(if nanosleep requires any libraries) |
| 9 | AC_LANG_SAVE |
| 10 | AC_LANG_C |
| 11 | acx_nanosleep_ok="no" |
| 12 | NANOSLEEP_LIBS= |
| 13 | # For most folks, this should just work |
| 14 | AC_TRY_LINK([#include <time.h>], |
| 15 | [static struct timespec ts; nanosleep(&ts, NULL);], |
| 16 | [acx_nanosleep_ok=yes]) |
| 17 | # For solaris, we may need -lrt |
| 18 | if test "x$acx_nanosleep_ok" != "xyes"; then |
| 19 | OLD_LIBS="$LIBS" |
| 20 | LIBS="-lrt $LIBS" |
| 21 | AC_TRY_LINK([#include <time.h>], |
| 22 | [static struct timespec ts; nanosleep(&ts, NULL);], |
| 23 | [acx_nanosleep_ok=yes]) |
| 24 | if test "x$acx_nanosleep_ok" = "xyes"; then |
| 25 | NANOSLEEP_LIBS="-lrt" |
| 26 | fi |
| 27 | LIBS="$OLD_LIBS" |
| 28 | fi |
| 29 | if test "x$acx_nanosleep_ok" != "xyes"; then |
| 30 | AC_MSG_ERROR([cannot find the nanosleep function]) |
| 31 | else |
| 32 | AC_MSG_RESULT(${NANOSLEEP_LIBS:-no}) |
| 33 | fi |
| 34 | AC_LANG_RESTORE |
| 35 | ]) |