From 5cd022d6c099c583c0494bdacd06f4eb32661135 Mon Sep 17 00:00:00 2001 From: Shea Levy Date: Sun, 1 Jun 2014 10:42:56 -0400 Subject: Add importNative primop This can be used to import a dynamic shared object and return an arbitrary value, including new primops. This can be used both to test new primops without having to recompile nix every time, and to build specialized primops that probably don't belong upstream (e.g. a function that calls out to gpg to decrypt a nixops secret as-needed). The imported function should initialize the Value & as needed. A single import can define multiple values by creating an attrset or list, of course. An example initialization function might look like: extern "C" void initialize(nix::EvalState & state, nix::Value & v) { v.type = nix::tPrimOp; v.primOp = NEW nix::PrimOp(myFun, 1, state.symbols.create("myFun")); } Then `builtins.importNative ./example.so "initialize"` will evaluate to the primop defined in the myFun function. --- src/libexpr/local.mk | 2 ++ 1 file changed, 2 insertions(+) (limited to 'src/libexpr/local.mk') diff --git a/src/libexpr/local.mk b/src/libexpr/local.mk index b3b408691..75a0e185e 100644 --- a/src/libexpr/local.mk +++ b/src/libexpr/local.mk @@ -8,6 +8,8 @@ libexpr_SOURCES := $(wildcard $(d)/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc libexpr_LIBS = libutil libstore libformat +libexpr_LDFLAGS = -ldl + # The dependency on libgc must be propagated (i.e. meaning that # programs/libraries that use libexpr must explicitly pass -lgc), # because inline functions in libexpr's header files call libgc. -- cgit v1.2.3