I downloaded the CVS version of wget today and tried to build it under
the latest (1.15-14) Cygwin. I hit two compilation problems, both in
src/ptimer.c.
1. The first problem is with the test for _POSIX_MONOTONIC_CLOCK on line
186. That line is:
#if _POSIX_MONOTONIC_CLOCK >= 0 /* -1 means not supported */
Under Cygwin, _POSIX_MONOTONIC_CLOCK is not defined, so cpp uses a
default value of 0 in the test. This causes the test to succeed, and
ptimer.c tries to compile "sysconf(_SC_MONOTONIC_CLOCK)" which fails.
A fix (but possibly not the most portable fix) for this is to change the
test:
#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK >= 0)
2. The second problem is a little more annoying. Under Cygwin,
clock_getres() is properly defined in time.h, but there is no librt.a to
resolve the reference. A possible workaround is to a) add a test for
clock_getres to aclocal.m4, and b) wrap the code in ptimer.c that calls
clock_getres() in a #if HAVE_CLOCK_GETRES conditional.
I have attached a patch implementing these two fixes, if anyone is
interested.
With these two problems resolved, the CVS version of wget is running
great under Cygwin. In a day or two, I should know if the >2G file
support is working as well...
Thanks!
KM
diff -ur wget.orig/aclocal.m4 wget/aclocal.m4
--- wget.orig/aclocal.m4 2005-04-08 01:41:08.000000000 +0200
+++ wget/aclocal.m4 2005-04-08 16:14:40.078125000 +0200
@@ -85,6 +85,9 @@
AC_CHECK_FUNCS(clock_gettime, [], [
AC_CHECK_LIB(rt, clock_gettime)
])
+ AC_CHECK_FUNCS(clock_getres, [], [
+ AC_CHECK_LIB(rt, clock_getres)
+ ])
])
dnl Check whether we need to link with -lnsl and -lsocket, as is the
diff -ur wget.orig/src/ptimer.c wget/src/ptimer.c
--- wget.orig/src/ptimer.c 2005-04-08 14:09:02.046875000 +0200
+++ wget/src/ptimer.c 2005-04-08 15:10:27.250000000 +0200
@@ -183,13 +183,14 @@
{
struct timespec res;
-#if _POSIX_MONOTONIC_CLOCK >= 0 /* -1 means not supported */
+#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK >= 0) /* -1
means not supported */
if (sysconf (_SC_MONOTONIC_CLOCK) > 0)
posix_clock_id = CLOCK_MONOTONIC;
else
#endif
posix_clock_id = CLOCK_REALTIME;
+#if HAVE_CLOCK_GETRES
if (clock_getres (posix_clock_id, &res) < 0)
{
logprintf (LOG_NOTQUIET, _("Cannot read clock resolution: %s\n"),
@@ -198,6 +199,10 @@
res.tv_sec = 0;
res.tv_nsec = 1000000;
}
+#else
+ res.tv_sec = 0;
+ res.tv_nsec = 1000000;
+#endif
posix_resolution = res.tv_sec * 1000.0 + res.tv_nsec / 1000000.0;
/* Guard against clock_getres reporting 0 resolution; after all, it
