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| author | Wladimir J. van der Laan <laanwj@gmail.com> | 2017-03-01 12:40:06 +0100 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2017-03-01 12:41:53 +0100 |
| commit | d19d45a1e6a4345a57d5983d466b16dadbec0da9 (patch) | |
| tree | af6dcbf0bb26adeeabe4eb5c19a5c31108bab9f3 /configure.ac | |
| parent | cbdb4732f10cb00ec46a35e5c7adb2c4cdf1d64d (diff) | |
| parent | 7e6dcd9995b99e894b8017f09016c405b066ca36 (diff) | |
| download | bitcoin-d19d45a1e6a4345a57d5983d466b16dadbec0da9.tar.xz | |
Merge #9821: util: Specific GetOSRandom for Linux/FreeBSD/OpenBSD
7e6dcd9 random: Add fallback if getrandom syscall not available (Wladimir J. van der Laan)
7cad849 sanity: Move OS random to sanity check function (Wladimir J. van der Laan)
aa09ccb squashme: comment that NUM_OS_RANDOM_BYTES should not be changed lightly (Wladimir J. van der Laan)
224e6eb util: Specific GetOSRandom for Linux/FreeBSD/OpenBSD (Wladimir J. van der Laan)
Tree-SHA512: 9fd408b1316c69de86674f342339b2f89192fd317c8c036b5df4320f828fa263c7966146bfc1904c51137ee4a26e4cb0f560b2cd05e18cde4d808b9b92ad15c4
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 5a09befea2..0de89288d0 100644 --- a/configure.ac +++ b/configure.ac @@ -574,6 +574,33 @@ 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.])]) |