HElib is an open-source software library that implements homomorphic encryption. It supports the BGV scheme with bootstrapping and the Approximate Number CKKS scheme. HElib also includes optimizations for efficient homomorphic evaluation, focusing on effective use of ciphertext packing techniques and on the Gentry-Halevi-Smart optimizations.
Hi there 👋, I'm reaching out on behalf of the team at the Homebrew package manager. When compiling with GCC 11 on Linux, it appears that the <optional> header must be explicitly added in order for compilation to succeed. Without it, there's errors like this:
[ 4%] Building CXX object src/CMakeFiles/helib.dir/binaryArith.cpp.o
cd /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build/src && /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/shims/linux/super/g++-11 -DHELIB_BOOT_THREADS -DHELIB_THREADS -Dhelib_EXPORTS -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/dependencies/json -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build/src -isystem /home/linuxbrew/.linuxbrew/include/NTL/.. -O3 -DNDEBUG -fPIC -march=native -Wall -Wpedantic -Wextra -Werror -std=c++17 -MD -MT src/CMakeFiles/helib.dir/BenesNetwork.cpp.o -MF CMakeFiles/helib.dir/BenesNetwork.cpp.o.d -o CMakeFiles/helib.dir/BenesNetwork.cpp.o -c /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/BenesNetwork.cpp
cd /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build/src && /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/shims/linux/super/g++-11 -DHELIB_BOOT_THREADS -DHELIB_THREADS -Dhelib_EXPORTS -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/dependencies/json -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include -I/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build/src -isystem /home/linuxbrew/.linuxbrew/include/NTL/.. -O3 -DNDEBUG -fPIC -march=native -Wall -Wpedantic -Wextra -Werror -std=c++17 -MD -MT src/CMakeFiles/helib.dir/binaryArith.cpp.o -MF CMakeFiles/helib.dir/binaryArith.cpp.o.d -o CMakeFiles/helib.dir/binaryArith.cpp.o -c /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/binaryArith.cpp
In file included from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/EncryptedArray.h:26,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/BenesNetwork.cpp:13:
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:211:22: error: 'optional' in namespace 'std' does not name a template type
211 | const std::optional<ModChainParams>& mparams,
| ^~~~~~~~
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:27:1: note: 'std::optional' is defined in header '<optional>'; did you forget to '#include <optional>'?
26 | #include <helib/scheme.h>
+++ |+#include <optional>
27 | #include <helib/JsonWrapper.h>
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:211:30: error: expected ',' or '...' before '<' token
211 | const std::optional<ModChainParams>& mparams,
| ^
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:24: error: 'optional' is not a member of 'std'
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^~~~~~~~
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:24: note: 'std::optional' is defined in header '<optional>'; did you forget to '#include <optional>'?
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:56: error: wrong number of template arguments (1, should be 2)
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/utility:70,
from /home/linuxbrew/.linuxbrew/include/NTL/../NTL/tools.h:13,
from /home/linuxbrew/.linuxbrew/include/NTL/../NTL/ZZ.h:19,
from /home/linuxbrew/.linuxbrew/include/NTL/../NTL/lzz_p.h:5,
from /home/linuxbrew/.linuxbrew/include/NTL/../NTL/lzz_pXFactoring.h:6,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/BenesNetwork.cpp:12:
/home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/bits/stl_pair.h:211:12: note: provided for 'template<class _T1, class _T2> struct std::pair'
211 | struct pair
| ^~~~
In file included from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/EncryptedArray.h:26,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/BenesNetwork.cpp:13:
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:57: error: expected unqualified-id before ',' token
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^
In file included from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/EncryptedArray.h:26,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/binaryArith.h:18,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/binaryArith.cpp:25:
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:211:22: error: 'optional' in namespace 'std' does not name a template type
211 | const std::optional<ModChainParams>& mparams,
| ^~~~~~~~
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:27:1: note: 'std::optional' is defined in header '<optional>'; did you forget to '#include <optional>'?
26 | #include <helib/scheme.h>
+++ |+#include <optional>
27 | #include <helib/JsonWrapper.h>
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:211:30: error: expected ',' or '...' before '<' token
211 | const std::optional<ModChainParams>& mparams,
| ^
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:24: error: 'optional' is not a member of 'std'
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^~~~~~~~
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:24: note: 'std::optional' is defined in header '<optional>'; did you forget to '#include <optional>'?
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:56: error: wrong number of template arguments (1, should be 2)
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/bits/stl_algobase.h:64,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/bits/stl_tree.h:63,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/map:60,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/binaryArith.cpp:18:
/home/linuxbrew/.linuxbrew/Cellar/gcc/11.1.0_1/include/c++/11.1.0/bits/stl_pair.h:211:12: note: provided for 'template<class _T1, class _T2> struct std::pair'
211 | struct pair
| ^~~~
In file included from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/EncryptedArray.h:26,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/binaryArith.h:18,
from /tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/src/binaryArith.cpp:25:
/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/include/helib/Context.h:1056:57: error: expected unqualified-id before ',' token
1056 | const std::pair<std::optional<Context::ModChainParams>,
| ^
make[2]: *** [src/CMakeFiles/helib.dir/build.make:79: src/CMakeFiles/helib.dir/BenesNetwork.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [src/CMakeFiles/helib.dir/build.make:93: src/CMakeFiles/helib.dir/binaryArith.cpp.o] Error 1
make[2]: Leaving directory '/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build'
make[1]: *** [CMakeFiles/Makefile2:101: src/CMakeFiles/helib.dir/all] Error 2
make[1]: Leaving directory '/tmp/helib-20210729-8183-1rf2hiw/HElib-2.1.0/build'
make: *** [Makefile:139: all] Error 2
Of interest,
note: 'std::optional' is defined in header '<optional>'; did you forget to '#include <optional>'?
Adding the mentioned header fixed the compilation in our case.
Hi there 👋, I'm reaching out on behalf of the team at the Homebrew package manager. When compiling with GCC 11 on Linux, it appears that the
<optional>header must be explicitly added in order for compilation to succeed. Without it, there's errors like this:Of interest,
Adding the mentioned header fixed the compilation in our case.
Downstream issue: https://github.com/Homebrew/homebrew-core/pull/82058