Improve random number generation

[wimlib] / configure.ac

diff --git a/configure.ac b/configure.ac
index 70b786814e665398dd529eafc0ab4cd0f6888083..d7de0b0817356481d1c3b15719616a5646bf72a0 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -59,7 +59,7 @@ AM_CONDITIONAL([WINDOWS_NATIVE_BUILD], [test "$WINDOWS_NATIVE_BUILD" = "yes"])
 
 # Useful functions which we can do without.
 AC_CHECK_FUNCS([futimens utimensat flock mempcpy       \
-               openat fstatat readlinkat fdopendir])
+               openat fstatat readlinkat fdopendir posix_fallocate])
 
 # Header checks, most of which are only here to satisfy conditional includes
 # made by the libntfs-3g headers.
@@ -75,6 +75,7 @@ AC_CHECK_HEADERS([alloca.h            \
                  sys/byteorder.h       \
                  sys/endian.h          \
                  sys/file.h            \
+                 sys/syscall.h         \
                  sys/sysctl.h          \
                  sys/times.h           \
                  sys/xattr.h           \
@@ -90,6 +91,13 @@ AC_CHECK_MEMBER([struct stat.st_mtim],
                [],
                [#include <sys/stat.h>])
 
+# Check for possible support for the Linux getrandom() system call
+AC_CHECK_DECL([__NR_getrandom],
+             [AC_DEFINE([HAVE_NR_GETRANDOM], [1], [Define to 1 if the system
+              headers define a system call number for getrandom()])],
+             [],
+             [#include <sys/syscall.h>])
+
 ###############################################################################
 #                           Required libraries                               #
 ###############################################################################