* configure (lang_flags): Let us switch from using _XOPEN_SOURCE=2

to _POSIX_C_SOURCE=199309L and _BSD_SOURCE.
In the .exe suffix test, try harder to redirect ls's output.
Test for fork stuff now needs <sys/types.h> evidently;
<unistd.h> does not necessarily pid_t, even though it defines
functions that return and accept pid_t!
The timegm test no longer needs _SVID_SOURCE since _BSD_SOURCE
covers it, and so we end up not using _SVID_SOURCE any more.
New tests for usleep and nanosleep.
The test for setenv is not conditional on timegm failing.

* eval.c: Include <time.h> and conditionally <windows.h>.
(usleep_wrap): New function.
(eval_init): New usleep_wrap function registered as usleep intrinsic.

* lib.c: Only define setenv and unsetenv if we don't have timegm,
because only in that situation they are used.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib.c b/lib.c
index 194e0c65..9662668b 100644
--- a/lib.c
+++ b/lib.c
@@ -5190,6 +5190,8 @@ val make_time(val year, val month, val day,
   return make_time_impl(mktime, year, month, day, hour, minute, second, isdst);
 }
 
+#if !HAVE_TIMEGM
+
 #if !HAVE_SETENV
 static void
 setenv(const char *name, const char *value, int overwrite)
@@ -5206,10 +5208,8 @@ unsetenv(const char *name)
 {
   setenv(name, "", 1);
 }
-
 #endif
 
-#if !HAVE_TIMEGM
 static time_t timegm_hack(struct tm *tm)
 {
     time_t ret;