Add 'nixpkgs/' from commit 'abf060725d7614bd3b9f96764262dfbc2f9c2199'

git-subtree-dir: nixpkgs
git-subtree-mainline: 4e31070265257dc67d120c27e0f75c2344fdfa9a
git-subtree-split: abf060725d7614bd3b9f96764262dfbc2f9c2199

2 files changed, 73 insertions, 0 deletions

diff --git a/nixpkgs/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch b/nixpkgs/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch
new file mode 100644
index 000000000000..2eee84d1c4b8
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/libsnark/darwin-fix-clock-gettime.patch
@@ -0,0 +1,41 @@
+Adapted from https://github.com/zcash/libsnark/pull/10
+
+diff --git a/depends/libff/libff/common/profiling.cpp b/depends/libff/libff/common/profiling.cpp
+index f2a1985..319149c 100755
+--- a/depends/libff/libff/common/profiling.cpp
++++ b/depends/libff/libff/common/profiling.cpp
+@@ -27,6 +27,13 @@
+ #include <proc/readproc.h>
+ #endif
+ 
++#ifdef __MACH__
++#include <time.h>
++#include <sys/time.h>
++#include <mach/clock.h>
++#include <mach/mach.h>
++#endif
++
+ namespace libff {
+ 
+ long long get_nsec_time()
+@@ -42,10 +49,20 @@ long long get_nsec_cpu_time()
+ 	return 0;
+ #else
+     ::timespec ts;
++#ifdef __MACH__
++    clock_serv_t cclock;
++    mach_timespec_t mts;
++    host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
++    clock_get_time(cclock, &mts);
++    mach_port_deallocate(mach_task_self(), cclock);
++    ts.tv_sec = mts.tv_sec;
++    ts.tv_nsec = mts.tv_nsec;
++#else
+     if ( ::clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) )
+         throw ::std::runtime_error("clock_gettime(CLOCK_PROCESS_CPUTIME_ID) failed");
+         // If we expected this to work, don't silently ignore failures, because that would hide the problem and incur an unnecessarily system-call overhead. So if we ever observe this exception, we should probably add a suitable #ifdef .
+         //TODO: clock_gettime(CLOCK_PROCESS_CPUTIME_ID) is not supported by native Windows. What about Cygwin? Should we #ifdef on CLOCK_PROCESS_CPUTIME_ID or on __linux__?
++#endif
+     return ts.tv_sec * 1000000000ll + ts.tv_nsec;
+ #endif
+ }
diff --git a/nixpkgs/pkgs/development/libraries/libsnark/default.nix b/nixpkgs/pkgs/development/libraries/libsnark/default.nix
new file mode 100644
index 000000000000..4ea2209160f8
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/libsnark/default.nix
@@ -0,0 +1,32 @@
+{ stdenv, fetchFromGitHub, cmake, pkgconfig, openssl, boost, gmp, procps }:
+
+let
+  rev = "9e6b19ff15bc19fba5da1707ba18e7f160e5ed07";
+  inherit (stdenv) lib;
+in stdenv.mkDerivation rec {
+  name = "libsnark-pre${version}";
+  version = stdenv.lib.substring 0 8 rev;
+
+  buildInputs = [ cmake pkgconfig openssl boost gmp ] ++ lib.optional stdenv.hostPlatform.isLinux procps;
+
+  cmakeFlags = lib.optionals stdenv.hostPlatform.isDarwin [ "-DWITH_PROCPS=OFF" "-DWITH_SUPERCOP=OFF" ];
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner           = "scipr-lab";
+    repo            = "libsnark";
+    sha256          = "13f02qp2fmfhvxlp4xi69m0l8r5nq913l2f0zwdk7hl46lprfdca";
+    fetchSubmodules = true;
+  };
+
+  patches = [ ./darwin-fix-clock-gettime.patch ];
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    description = "C++ library for zkSNARKs";
+    homepage = https://github.com/scipr-lab/libsnark;
+    license = licenses.mit;
+    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
+  };
+}