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| author | Janne Blomqvist <jb@gcc.gnu.org> | 2018-08-13 23:21:50 +0300 |
|---|---|---|
| committer | Janne Blomqvist <jb@gcc.gnu.org> | 2018-08-13 23:21:50 +0300 |
| commit | d66d6d15f1ab42c503025548d6ab9772a85ad791 (patch) | |
| tree | 0cb0150a31538dfc107e19dbeff59fef4420ae6f /libgfortran/configure | |
| parent | 72217988ca377398e5c7c1ae98b83ca53b1877d4 (diff) | |
| download | gcc-d66d6d15f1ab42c503025548d6ab9772a85ad791.zip gcc-d66d6d15f1ab42c503025548d6ab9772a85ad791.tar.gz gcc-d66d6d15f1ab42c503025548d6ab9772a85ad791.tar.bz2 | |
Use getentropy() for seeding PRNG
The getentropy function, found on Linux, OpenBSD, and recently also
FreeBSD, can be used to get random bytes to initialize the PRNG. It
is similar to the traditional way of reading from /dev/urandom, but
being a system call rather than a special file, it doesn't suffer from
problems like running out of file descriptors, or failure when running
in a container where /dev/urandom may not be available.
Regtested on x86_64-pc-linux-gnu, Ok for trunk?
2018-08-13 Janne Blomqvist <jb@gcc.gnu.org>
* configure.ac: Check for getentropy.
* intrinsics/random.c (getosrandom): Use getentropy if available.
* config.h.in: Regenerated.
* configure: Regenerated.
From-SVN: r263522
Diffstat (limited to 'libgfortran/configure')
| -rwxr-xr-x | libgfortran/configure | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libgfortran/configure b/libgfortran/configure index 91fce8f..42b4c0b 100755 --- a/libgfortran/configure +++ b/libgfortran/configure @@ -2570,6 +2570,7 @@ as_fn_append ac_func_list " snprintf" as_fn_append ac_func_list " ftruncate" as_fn_append ac_func_list " chsize" as_fn_append ac_func_list " chdir" +as_fn_append ac_func_list " getentropy" as_fn_append ac_func_list " getlogin" as_fn_append ac_func_list " gethostname" as_fn_append ac_func_list " kill" @@ -12512,7 +12513,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 12515 "configure" +#line 12516 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -12618,7 +12619,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 12621 "configure" +#line 12622 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -16778,6 +16779,8 @@ done + + fi # Check strerror_r, cannot be above as versions with two and three arguments exist |