grpc: build shared libs, fixes #58375

pkgs/development/libraries/grpc/default.nix

@@ -18,6 +18,7 @@ stdenv.mkDerivation rec {
       "-DgRPC_SSL_PROVIDER=package"
       "-DgRPC_PROTOBUF_PROVIDER=package"
       "-DgRPC_GFLAGS_PROVIDER=package"
+      "-DBUILD_SHARED_LIBS=ON"
     ];
 
   # CMake creates a build directory by default, this conflicts with the
@@ -26,6 +27,10 @@ stdenv.mkDerivation rec {
     rm -vf BUILD
   '';
 
+  preBuild = ''
+    export LD_LIBRARY_PATH=$(pwd):$LD_LIBRARY_PATH
+  '';
+
   NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isClang "-Wno-error=unknown-warning-option";
 
   enableParallelBuilds = true;