diff --git a/.gitignore b/.gitignore
index 9287d31..352b28a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 bin
+bin2
 compile_commands.json
 .clangd
 temp.*
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e68f9ae..cb7f206 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,24 +1,35 @@
 cmake_minimum_required(VERSION 3.0)
 
-project(cmkr VERSION 0.1.0)
-
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+project(cmkr VERSION 0.1.0)
 
 
-set(CMKR_SOURCES
-	"src/main.cpp"
+set(CMKRLIB_SOURCES
 	"src/args.cpp"
 	"src/gen.cpp"
+	"src/help.cpp"
 	)
 
-add_executable(cmkr ${CMKR_SOURCES})
+add_library(cmkrlib STATIC ${CMKRLIB_SOURCES})
 
-target_include_directories(cmkr PUBLIC
+target_include_directories(cmkrlib PUBLIC
 	"vendor"
 	)
 
-target_compile_features(cmkr PUBLIC
+target_compile_features(cmkrlib PUBLIC
 	"cxx_std_17"
 	)
 
+set(CMKR_SOURCES
+	"src/main.cpp"
+	)
+
+add_executable(cmkr  ${CMKR_SOURCES})
+
+target_link_libraries(cmkr PUBLIC
+	"cmkrlib"
+	)
+
+
+
diff --git a/README.md b/README.md
index f7709a6..cd979e7 100644
--- a/README.md
+++ b/README.md
@@ -18,40 +18,63 @@ cmkr parses cmake.toml files (using toml11) at the project directory. A basic he
 [cmake]
 minimum_required = "3.0"
 
+[project]
+name = "app"
+version = "0.1.0"
+
+[[bin]]
+name = "app"
+type = "exe"
+sources = ["src/main.cpp"]
+```
+
+This project's cmake.toml:
+```toml
+[cmake]
+minimum_required = "3.0"
+
 [project]
 name = "cmkr"
 version = "0.1.0"
 
+[[bin]]
+name = "cmkrlib"
+type = "static"
+sources = ["src/args.cpp", "src/gen.cpp", "src/help.cpp"]
+include_dirs = ["vendor"]
+features = ["cxx_std_17"]
+
 [[bin]]
 name = "cmkr"
 type = "exe"
 sources = ["src/main.cpp"]
+link_libs = ["cmkrlib"]
 ```
 
 Currently supported fields:
 ```toml
-[cmake] # required
+[cmake] # required for top-level project
 minimum_required = "3.0" # required
-# cpp_flags = [] # optional
-# c_flags = [] # optional
-# linker_flags = [] # optional
-# subdirs = [] # optional
+cpp_flags = [] # optional
+c_flags = [] # optional
+link_flags = [] # optional
+subdirs = [] # optional
 
-[project] # required
-name = "cmkr" # required
+[project] # required per project
+name = "app" # required
 version = "0.1.0" # required
 
 [dependencies] # optional, runs find_package, use "*" to ignore version
 boost = "1.74.0" # optional
 
 [[bin]] # required, can define several binaries
-name = "cmkr" # required
+name = "app" # required
 type = "exe" # required (exe || shared || static)
-sources = ["src/main.cpp", "src/args.cpp", "src/gen.cpp"] # required
-include_directories = ["vendor"] # optional
-compile_features = ["cxx_std_17"] # optional
-# definitions = [] # optional
-# link_libraries = [] # optional 
+sources = ["src/main.cpp"] # required
+include_dirs = ["vendor"] # optional
+features = ["cxx_std_17"] # optional
+defines = [] # optional
+link_libs = [] # optional 
 ```
 
 The cmkr executable can be run from the command-line:
@@ -60,7 +83,7 @@ Usage: cmkr [arguments]
 arguments:
     init     [exe|shared|static]    Starts a new project in the same directory.
     gen                             Generates CMakeLists.txt file.
-    build    [extra cmake args]     Run cmake and build.
+    build    <extra cmake args>     Run cmake and build.
     help                            Show help.
     version                         Current cmkr version.
 ```
diff --git a/cmake.toml b/cmake.toml
index 7c06070..54035dc 100644
--- a/cmake.toml
+++ b/cmake.toml
@@ -1,23 +1,20 @@
-[cmake] # required
-minimum_required = "3.0" # required
-# cpp_flags = [] # optional
-# c_flags = [] # optional
-# linker_flags = [] # optional
-# subdirs = [] # optional
+[cmake]
+minimum_required = "3.0"
 
-[project] # required
-name = "cmkr" # required
-version = "0.1.0" # required
+[project]
+name = "cmkr"
+version = "0.1.0"
 
-# [dependencies] # optional, runs find_package, use "*" to ignore version
-# boost = "1.74.0"
+[[bin]]
+name = "cmkrlib"
+type = "static"
+sources = ["src/args.cpp", "src/gen.cpp", "src/help.cpp"]
+include_dirs = ["vendor"]
+features = ["cxx_std_17"]
 
-[[bin]] # required
-name = "cmkr" # required
-type = "exe" # required (exe || shared || static)
-sources = ["src/main.cpp", "src/args.cpp", "src/gen.cpp"] # required
-include_directories = ["vendor"] # optional
-compile_features = ["cxx_std_17"] # optional
-# definitions = [] # optional
-# link_libraries = [] # optional 
+[[bin]]
+name = "cmkr"
+type = "exe"
+sources = ["src/main.cpp"]
+link_libs = ["cmkrlib"]
 
diff --git a/src/args.cpp b/src/args.cpp
index 630325c..56ea515 100644
--- a/src/args.cpp
+++ b/src/args.cpp
@@ -1,26 +1,34 @@
-#include "args.hpp"
-#include "gen.hpp"
-#include "help.hpp"
-#include <cstddef>
-#include <cstdlib>
+#include "args.h"
+#include "gen.h"
+#include "help.h"
+
+#include <filesystem>
+#include <stddef.h>
 #include <stdexcept>
+#include <stdlib.h>
+#include <string>
+#include <vector>
 
 namespace cmkr::args {
-std::string handle_args(std::vector<std::string> &args) {
+const char *handle_args(int argc, char **argv) {
+    std::vector<std::string> args;
+    for (int i = 0; i < argc; ++i)
+        args.push_back(argv[i]);
+
     if (args.size() < 2)
         throw std::runtime_error("Please provide command line arguments!");
     std::string main_arg = args[1];
     if (main_arg == "gen") {
-        cmkr::gen::generate_cmake();
+        cmkr::gen::generate_cmake(std::filesystem::current_path().string().c_str());
         return "Generation successful!";
     } else if (main_arg == "help") {
-        return cmkr::help::help_msg;
+        return cmkr::help::message();
     } else if (main_arg == "version") {
-        return cmkr::help::version;
+        return cmkr::help::version();
     } else if (main_arg == "init") {
         if (args.size() < 3)
             throw std::runtime_error("Please provide a project type!");
-        cmkr::gen::generate_project(args[2]);
+        cmkr::gen::generate_project(args[2].c_str());
         return "Directory initialized!";
     } else if (main_arg == "build") {
         std::string command = "cmake -S. -Bbin ";
@@ -38,4 +46,8 @@ std::string handle_args(std::vector<std::string> &args) {
         return "Unknown argument!";
     }
 }
-} // namespace cmkr::args
\ No newline at end of file
+} // namespace cmkr::args
+
+const char *cmkr_args_handle_args(int argc, char **argv) {
+    return cmkr::args::handle_args(argc, argv);
+}
diff --git a/src/args.h b/src/args.h
new file mode 100644
index 0000000..3dfa47e
--- /dev/null
+++ b/src/args.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#ifdef __cplusplus
+namespace cmkr::args {
+
+const char *handle_args(int argc, char **argv);
+}
+
+extern "C" {
+#endif
+
+const char *cmkr_args_handle_args(int, char **);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/args.hpp b/src/args.hpp
deleted file mode 100644
index e022c9e..0000000
--- a/src/args.hpp
+++ /dev/null
@@ -1,8 +0,0 @@
-#pragma once
-
-#include <string>
-#include <vector>
-
-namespace cmkr::args {
-std::string handle_args(std::vector<std::string> &args);
-}
\ No newline at end of file
diff --git a/src/gen.cpp b/src/gen.cpp
index 3572acc..c442fd8 100644
--- a/src/gen.cpp
+++ b/src/gen.cpp
@@ -1,4 +1,5 @@
-#include "gen.hpp"
+#include "gen.h"
+
 #include <filesystem>
 #include <fstream>
 #include <map>
@@ -9,7 +10,9 @@
 namespace fs = std::filesystem;
 
 namespace cmkr::gen {
+
 namespace detail {
+
 inline std::string to_upper(const std::string &str) {
     std::string temp;
     temp.reserve(str.size());
@@ -18,14 +21,13 @@ inline std::string to_upper(const std::string &str) {
     }
     return temp;
 }
-void handle_bins(std::stringstream &s, const std::string &bin_type) {
-}
+
 } // namespace detail
 
-void generate_project(const std::string &str) {
+void generate_project(const char *str) {
     fs::create_directory("src");
     auto dir_name = fs::current_path().stem();
-    if (str == "exe") {
+    if (!strcmp(str, "exe")) {
         std::ofstream ofs("src/main.cpp");
         if (ofs.is_open()) {
             ofs << "#include <iostream>\n\nint main() {\n\tstd::cout << \"Hello world!\" << "
@@ -44,7 +46,7 @@ void generate_project(const std::string &str) {
         }
         ofs2.flush();
         ofs2.close();
-    } else if (str == "static" || str == "shared") {
+    } else if (!strcmp(str, "static") || !strcmp(str, "shared")) {
         std::ofstream ofs("src/lib.cpp");
         if (ofs.is_open()) {
             ofs << "int dll_main() {\n\treturn 0;\n}";
@@ -58,7 +60,8 @@ void generate_project(const std::string &str) {
                  << dir_name.string()
                  << "\"\nversion = "
                     "\"0.1.0\"\n\n[[lib]]\nname = \""
-                 << dir_name.string() << "\"\nsources = [\"src/lib.cpp\"]\ntype = \"" << str << "\"\n";
+                 << dir_name.string() << "\"\nsources = [\"src/lib.cpp\"]\ntype = \"" << str
+                 << "\"\n";
         }
         ofs2.flush();
         ofs2.close();
@@ -67,53 +70,60 @@ void generate_project(const std::string &str) {
     }
 }
 
-void generate_cmake() {
+void generate_cmake(const char *path) {
     std::stringstream ss;
+    std::vector<std::string> subdirs;
+
+    const auto toml = toml::parse(fs::path(path) / "cmake.toml");
+    if (toml.contains("cmake")) {
+        const auto &cmake = toml::find(toml, "cmake");
+        const std::string cmake_min = toml::find(cmake, "minimum_required").as_string();
+        ss << "cmake_minimum_required(VERSION " << cmake_min << ")\n\n"
+           << "set(CMAKE_EXPORT_COMPILE_COMMANDS ON)\n\n";
+
+        if (cmake.contains("cpp_flags")) {
+            ss << "set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}";
+            const auto flags = toml::find(cmake, "cpp_flags").as_array();
+            for (const auto &flag : flags) {
+                ss << " " << flag;
+            }
+            ss << ")\n\n";
+        }
 
-    const auto toml = toml::parse("cmake.toml");
-    const auto &cmake = toml::find(toml, "cmake");
-    const std::string cmake_min = toml::find(cmake, "minimum_required").as_string();
-    const auto &project = toml::find(toml, "project");
-    const std::string proj_name = toml::find(project, "name").as_string();
-    const std::string proj_version = toml::find(project, "version").as_string();
-
-    ss << "cmake_minimum_required(VERSION " << cmake_min << ")\n\n"
-       << "project(" << proj_name << " VERSION " << proj_version << ")\n\n"
-       << "set(CMAKE_EXPORT_COMPILE_COMMANDS ON)\n\n";
-
-    if (cmake.contains("cpp_flags")) {
-        ss << "set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}";
-        const auto flags = toml::find(cmake, "cpp_flags").as_array();
-        for (const auto &flag : flags) {
-            ss << " " << flag;
+        if (cmake.contains("c_flags")) {
+            ss << "set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS}";
+            const auto flags = toml::find(cmake, "c_flags").as_array();
+            for (const auto &flag : flags) {
+                ss << " " << flag;
+            }
+            ss << ")\n\n";
         }
-        ss << ")\n\n";
-    }
 
-    if (cmake.contains("c_flags")) {
-        ss << "set(CMAKE_C_FLAGS ${CMAKE_C_FLAGS}";
-        const auto flags = toml::find(cmake, "c_flags").as_array();
-        for (const auto &flag : flags) {
-            ss << " " << flag;
+        if (cmake.contains("link_flags")) {
+            ss << "set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS}";
+            const auto flags = toml::find(cmake, "link_flags").as_array();
+            for (const auto &flag : flags) {
+                ss << " " << flag;
+            }
+            ss << ")\n\n";
         }
-        ss << ")\n\n";
-    }
 
-    if (cmake.contains("linker_flags")) {
-        ss << "set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS}";
-        const auto flags = toml::find(cmake, "linker_flags").as_array();
-        for (const auto &flag : flags) {
-            ss << " " << flag;
+        if (cmake.contains("subdirs")) {
+            const auto dirs = toml::find(cmake, "subdirs").as_array();
+            for (const auto &dir : dirs) {
+                ss << "add_subdirectory(" << dir << ")\n";
+                subdirs.push_back(dir.as_string());
+            }
+            ss << "\n\n";
         }
-        ss << ")\n\n";
     }
 
-    if (cmake.contains("subdirs")) {
-        const auto dirs = toml::find(cmake, "subdirs").as_array();
-        for (const auto &dir : dirs) {
-            ss << "add_subdirectory(" << dir << ")\n";
-        }
-        ss << "\n\n";
+    if (toml.contains("project")) {
+        const auto &project = toml::find(toml, "project");
+        const std::string proj_name = toml::find(project, "name").as_string();
+        const std::string proj_version = toml::find(project, "version").as_string();
+
+        ss << "project(" << proj_name << " VERSION " << proj_version << ")\n\n";
     }
 
     if (toml.contains("dependencies")) {
@@ -159,8 +169,8 @@ void generate_cmake() {
                << add_command << "(" << bin_name << " " << bin_type << " ${"
                << detail::to_upper(bin_name) << "_SOURCES})\n\n";
 
-            if (bin.contains("include_directories")) {
-                const auto includes = toml::find(bin, "include_directories").as_array();
+            if (bin.contains("include_dirs")) {
+                const auto includes = toml::find(bin, "include_dirs").as_array();
                 ss << "target_include_directories(" << bin_name << " PUBLIC\n\t";
                 for (const auto &inc : includes) {
                     ss << inc << "\n\t";
@@ -168,8 +178,8 @@ void generate_cmake() {
                 ss << ")\n\n";
             }
 
-            if (bin.contains("link_libraries")) {
-                const auto libraries = toml::find(bin, "link_libraries").as_array();
+            if (bin.contains("link_libs")) {
+                const auto libraries = toml::find(bin, "link_libs").as_array();
                 ss << "target_link_libraries(" << bin_name << " PUBLIC\n\t";
                 for (const auto &l : libraries) {
                     ss << l << "\n\t";
@@ -177,8 +187,8 @@ void generate_cmake() {
                 ss << ")\n\n";
             }
 
-            if (bin.contains("compile_features")) {
-                const auto feats = toml::find(bin, "compile_features").as_array();
+            if (bin.contains("features")) {
+                const auto feats = toml::find(bin, "features").as_array();
                 ss << "target_compile_features(" << bin_name << " PUBLIC\n\t";
                 for (const auto &feat : feats) {
                     ss << feat << "\n\t";
@@ -186,8 +196,8 @@ void generate_cmake() {
                 ss << ")\n\n";
             }
 
-            if (bin.contains("definitions")) {
-                const auto defs = toml::find(bin, "definitions").as_array();
+            if (bin.contains("defines")) {
+                const auto defs = toml::find(bin, "defines").as_array();
                 ss << "target_add_definitions(" << bin_name << " PUBLIC\n\t";
                 for (const auto &def : defs) {
                     ss << def << "\n\t";
@@ -198,12 +208,23 @@ void generate_cmake() {
     }
 
     ss << "\n\n";
-
-    std::ofstream ofs("CMakeLists.txt");
+    // printf("%s\n", ss.str().c_str());
+    std::ofstream ofs(fs::path(path) / "CMakeLists.txt");
     if (ofs.is_open()) {
         ofs << ss.rdbuf();
     }
     ofs.flush();
     ofs.close();
+    for (const auto &sub : subdirs) {
+        generate_cmake(sub.c_str());
+    }
+}
+} // namespace cmkr::gen
+
+void cmkr_gen_generate_project(const char *typ) {
+    cmkr::gen::generate_project(typ);
+}
+
+void cmkr_gen_generate_cmake(const char *path) {
+    cmkr::gen::generate_cmake(path);
 }
-} // namespace cmkr::gen
\ No newline at end of file
diff --git a/src/gen.h b/src/gen.h
new file mode 100644
index 0000000..0ef6bc2
--- /dev/null
+++ b/src/gen.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#ifdef __cplusplus
+namespace cmkr::gen {
+
+void generate_project(const char *typ);
+
+void generate_cmake(const char *path);
+
+} // namespace cmkr::gen
+
+extern "C" {
+#endif
+
+void cmkr_gen_generate_project(const char *typ);
+
+void cmkr_gen_generate_cmake(const char *path);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/gen.hpp b/src/gen.hpp
deleted file mode 100644
index e828803..0000000
--- a/src/gen.hpp
+++ /dev/null
@@ -1,9 +0,0 @@
-#pragma once
-
-#include <string>
-
-namespace cmkr::gen {
-void generate_project(const std::string &str);
-
-void generate_cmake();
-} // namespace cmkr::gen
\ No newline at end of file
diff --git a/src/help.cpp b/src/help.cpp
new file mode 100644
index 0000000..445b677
--- /dev/null
+++ b/src/help.cpp
@@ -0,0 +1,28 @@
+#include "help.h"
+
+namespace cmkr::help {
+
+const char *version() {
+    return "cmkr version 0.1.0";
+}
+
+const char *message() {
+    return R"lit(
+Usage: cmkr [arguments]
+arguments:
+    init     [exe|shared|static]    Starts a new project in the same directory.
+    gen                             Generates CMakeLists.txt file.
+    build    <extra cmake args>     Run cmake and build.
+    help                            Show help.
+    version                         Current cmkr version.
+            )lit";
+}
+} // namespace cmkr::help
+
+const char *cmkr_help_version(void) {
+    return cmkr::help::version();
+}
+
+const char *cmkr_help_message(void) {
+    return cmkr::help::message();
+}
\ No newline at end of file
diff --git a/src/help.h b/src/help.h
new file mode 100644
index 0000000..4cece36
--- /dev/null
+++ b/src/help.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#ifdef __cplusplus
+namespace cmkr::help {
+
+const char *version();
+
+const char *message();
+
+} // namespace cmkr::help
+
+extern "C" {
+#endif
+
+const char *cmkr_help_version(void);
+
+const char *cmkr_help_message(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/help.hpp b/src/help.hpp
deleted file mode 100644
index f3390c6..0000000
--- a/src/help.hpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#pragma once
-
-namespace cmkr::help {
-
-const char *version = "cmkr version 0.1.0";
-
-const char *help_msg = R"lit(
-Usage: cmkr [arguments]
-arguments:
-    init     [exe|shared|static]    Starts a new project in the same directory.
-    gen                             Generates CMakeLists.txt file.
-    build    [cmake args...]        Run cmake and build.
-    help                            Show help.
-    version                         Current cmkr version.
-    )lit";
-
-} // namespace cmkr::help
diff --git a/src/main.cpp b/src/main.cpp
index a973ddb..6faac06 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,16 +1,12 @@
-#include "args.hpp"
-#include <iostream>
-#include <string>
-#include <vector>
+#include "args.h"
 
-int main(int argc, char **argv) try {
-    std::vector<std::string> args;
-    for (int i = 0; i < argc; ++i)
-        args.push_back(argv[i]);
+#include <stdexcept>
+#include <stdio.h>
+#include <stdlib.h>
 
-    auto output = cmkr::args::handle_args(args);
-    std::cout << output << std::endl;
-    return 0;
+int main(int argc, char **argv) try {
+    auto output = cmkr::args::handle_args(argc, argv);
+    return fprintf(stdout, "%s\n", output) < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 } catch (const std::exception &e) {
-    std::cerr << e.what() << std::endl;
+    fprintf(stderr, "%s\n", e.what());
 }
\ No newline at end of file