Add lmdb to IOG profiles (#238)

ouroboros-consensus depends on cardano-lmdb which requires the lmdb
system library (pkg-config: lmdb>=0.9 && <0.10). Since UTxO-HD was
integrated in Cardano Node 10.4.1, lmdb is required for all Cardano
development.

Adds lmdb to dynamic shells and static-lmdb (static-only build via
Makefile ILIBS patching, matching nixpkgs isStatic pattern) to static
shells. The wrapped-cabal in static.nix gets the corresponding -L flag
so GHC finds the static library.

Closes #218
Supersedes #221

Author: angerman

dynamic.nix

@@ -136,6 +136,7 @@ pkgs.mkShell {
           jq
           libblst
           libsodium-vrf
+          lmdb           # required by ouroboros-consensus (cardano-lmdb)
           secp256k1
           yq-go
         ]

flake.nix

@@ -34,6 +34,13 @@
             '';
             postFixup = "";
           });
+          # lmdb uses a plain Makefile (no autoconf), so we strip the .so
+          # target the same way nixpkgs does for isStatic platforms.
+          static-lmdb = final.lmdb.overrideAttrs (old: {
+            postPatch = (old.postPatch or "") + ''
+              sed 's/^ILIBS\>.*/ILIBS = liblmdb.a/' -i Makefile
+            '';
+          });
          });
 
          # nixpkgs defines happy = justStaticExecutables haskellPackages.happy

static.nix

@@ -50,6 +50,7 @@ let tool-version-map = (import ./tool-map.nix) self;
                 --ghc-option=-L${lib.getLib static-libsodium-vrf}/lib \
                 --ghc-option=-L${lib.getLib static-secp256k1}/lib \
                 --ghc-option=-L${lib.getLib static-libblst}/lib \
+                --ghc-option=-L${lib.getLib static-lmdb}/lib \
                 --ghc-option=-L${lib.getLib static-openssl}/lib
             ;;
             clean|unpack)
@@ -136,6 +137,7 @@ pkgs.mkShell (rec {
     ] ++ lib.optionals withIOG [
         static-libblst
         static-libsodium-vrf
+        static-lmdb           # required by ouroboros-consensus (cardano-lmdb)
         static-secp256k1
         icu           # for cardano-cli
         gh