diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 78129fb202..e454c15f04 100644 --- a/configure.ac +++ b/configure.ac @@ -558,6 +558,33 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([ ] ) +# Check for different ways of gathering OS randomness +AC_MSG_CHECKING(for Linux getrandom syscall) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h> + #include <sys/syscall.h> + #include <linux/random.h>]], + [[ syscall(SYS_getrandom, nullptr, 32, 0); ]])], + [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYS_GETRANDOM, 1,[Define this symbol if the Linux getrandom system call is available]) ], + [ AC_MSG_RESULT(no)] +) + +AC_MSG_CHECKING(for getentropy) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>]], + [[ getentropy(nullptr, 32) ]])], + [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_GETENTROPY, 1,[Define this symbol if the BSD getentropy system call is available]) ], + [ AC_MSG_RESULT(no)] +) + +AC_MSG_CHECKING(for sysctl KERN_ARND) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> + #include <sys/sysctl.h>]], + [[ static const int name[2] = {CTL_KERN, KERN_ARND}; + sysctl(name, 2, nullptr, nullptr, nullptr, 0); ]])], + [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SYSCTL_ARND, 1,[Define this symbol if the BSD sysctl(KERN_ARND) is available]) ], + [ AC_MSG_RESULT(no)] +) + +# Check for reduced exports if test x$use_reduce_exports = xyes; then AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],[RE_CXXFLAGS="-fvisibility=hidden"], [AC_MSG_ERROR([Cannot set default symbol visibility. Use --disable-reduce-exports.])]) |