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diff -ur less-418.orig/configure.ac less-418/configure.ac
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--- less-418.orig/configure.ac 2008-12-22 07:10:44.000000000 -0500
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+++ less-418/configure.ac 2008-12-22 07:28:58.000000000 -0500
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@@ -203,6 +203,8 @@
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[Define HAVE_TIME_T if your system supports the "time_t" type.])
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AH_TEMPLATE([HAVE_STRERROR],
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[Define HAVE_STRERROR if you have the strerror() function.])
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+AH_TEMPLATE([HAVE_FSYNC],
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+ [Define HAVE_FSYNC if fsync() on a tty works.])
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AH_TEMPLATE([HAVE_FILENO],
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[Define HAVE_FILENO if you have the fileno() macro.])
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AH_TEMPLATE([HAVE_ERRNO],
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@@ -251,7 +253,7 @@
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# Checks for library functions.
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AC_TYPE_SIGNAL
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-AC_CHECK_FUNCS([fsync popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod])
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+AC_CHECK_FUNCS([popen _setjmp sigprocmask sigsetmask snprintf stat system fchmod])
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# AC_CHECK_FUNCS may not work for inline functions, so test these separately.
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AC_MSG_CHECKING(for memcpy)
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@@ -298,6 +300,16 @@
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#endif], [static char *x; x = strerror(0);],
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[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_STRERROR)], [AC_MSG_RESULT(no)])
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+AC_MSG_CHECKING(for fsync)
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+AC_TRY_RUN([
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+#include <fcntl.h>
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+#include <unistd.h>
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+int main(void)
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+{
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+ int fd = open("/dev/tty", O_RDWR);
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+ return fsync(fd);
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+}], [AC_MSG_RESULT(yes); AC_DEFINE(HAVE_FSYNC)], [AC_MSG_RESULT(no)])
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+
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AC_MSG_CHECKING(for sys_errlist)
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AC_TRY_LINK(, [extern char *sys_errlist[]; static char **x; x = sys_errlist;],
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[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYS_ERRLIST)], [AC_MSG_RESULT(no)])
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