don't use submodules

Use cmake FetchContent instead

.gitmodules

@@ -1,12 +0,0 @@
-[submodule "test/pycparser"]
-	path = test/pycparser
-	url = https://github.com/eliben/pycparser.git
-[submodule "3rd/gtest"]
-	path = 3rd/gtest
-	url = https://github.com/google/googletest.git
-[submodule "3rd/gbench"]
-	path = 3rd/gbench
-	url = https://github.com/kriskwiatkowski/benchmark.git
-[submodule "3rd/cpu_features"]
-	path = 3rd/cpu_features
-	url = https://github.com/kriskwiatkowski/cpu_features.git

3rd/cpu_features

@@ -1 +0,0 @@
-Subproject commit 2b07c2ab7df71d0b6c19afb93f68a808b412a7ff

3rd/gbench

@@ -1 +0,0 @@
-Subproject commit e45fcc64e02489f718df499a162b41f742a1b7e5

3rd/gtest

@@ -1 +0,0 @@
-Subproject commit 1a8ecf1813d022cc7914e04564b92decff6161fc

CMakeLists.txt

@@ -1,10 +1,36 @@
 cmake_minimum_required(VERSION 3.13)
 project(cryptocore VERSION 0.0.1 LANGUAGES C)
+include(FetchContent)
 
 enable_language(C)
 enable_language(CXX)
 enable_language(ASM)
 
+# Dependencies
+FetchContent_Declare(
+  gtest
+  SOURCE_DIR     ${PROJECT_SOURCE_DIR}/3rd/gtest
+  GIT_REPOSITORY https://github.com/google/googletest.git
+  GIT_TAG        a3460d1aeeaa43fdf137a6adefef10ba0b59fe4b
+)
+FetchContent_Populate(gtest)
+
+FetchContent_Declare(
+  cpu_features
+  SOURCE_DIR     ${PROJECT_SOURCE_DIR}/3rd/cpu_features
+  GIT_REPOSITORY https://github.com/google/cpu_features.git
+  GIT_TAG        bc2846e78faeb26b8a46c17df369d4e5f1f9e2bb
+)
+FetchContent_Populate(cpu_features)
+
+FetchContent_Declare(
+  gbench
+  SOURCE_DIR     ${PROJECT_SOURCE_DIR}/3rd/gbench
+  GIT_REPOSITORY https://github.com/kriskwiatkowski/benchmark.git
+  GIT_TAG        e45fcc64e02489f718df499a162b41f742a1b7e5
+)
+FetchContent_Populate(gbench)
+
 add_subdirectory(3rd/gtest)
 add_subdirectory(3rd/cpu_features)
 

buid.dbg/.drone.yml

@@ -1,14 +0,0 @@
-kind: pipeline
-type: exec
-name: default
-
-steps:
-- name: build
-  commands:
-  - git submodule init
-  - git submodule update --recursive --remote
-  - mkdir build
-  - cd build
-  - cmake ..
-  - make
-  - ./test