diff --git a/.gitignore b/.gitignore
index 449ba71..cc9b7e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -192,3 +192,4 @@ config.h
 config.nice
 *.la
 Makefile*
+!Makefile.am
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..113e859
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,21 @@
+[submodule "aws-c-common"]
+	path = crt/aws-c-common
+	url = https://github.com/awslabs/aws-c-common.git
+[submodule "aws-c-io"]
+	path = crt/aws-c-io
+	url = https://github.com/awslabs/aws-c-io.git
+[submodule "aws-c-http"]
+	path = crt/aws-c-http
+	url = https://github.com/awslabs/aws-c-http.git
+[submodule "aws-c-compression"]
+	path = crt/aws-c-compression
+	url = https://github.com/awslabs/aws-c-compression.git
+[submodule "aws-c-auth"]
+	path = crt/aws-c-auth
+	url = https://github.com/awslabs/aws-c-auth.git
+[submodule "aws-c-cal"]
+	path = crt/aws-c-cal
+	url = https://github.com/awslabs/aws-c-cal.git
+[submodule "s2n"]
+	path = crt/s2n
+	url = https://github.com/awslabs/s2n.git
diff --git a/Makefile.frag b/Makefile.frag
new file mode 100644
index 0000000..bf9e3b2
--- /dev/null
+++ b/Makefile.frag
@@ -0,0 +1,77 @@
+
+INSTALL_DIR=$(shell pwd)/build/install
+
+crt_libs=$(INSTALL_DIR)/lib/libaws-c-common.a \
+	$(INSTALL_DIR)/lib/libaws-c-cal.a \
+	$(INSTALL_DIR)/lib/libaws-c-io.a \
+	$(INSTALL_DIR)/lib/libaws-c-compression.a \
+	$(INSTALL_DIR)/lib/libaws-c-http.a \
+	$(INSTALL_DIR)/lib/libaws-c-auth.a \
+	$(INSTALL_DIR)/lib/libs2n.a
+
+crt-static: $(crt_libs) $(INSTALL_DIR)/lib/libcrypto.a
+
+build/deps/openssl:
+	@echo Fetching libcrypto source
+	git clone --depth=1 --single-branch --branch OpenSSL_1_1_1-stable https://github.com/openssl/openssl.git build/deps/openssl
+
+$(INSTALL_DIR)/lib/libcrypto.a: build/deps/openssl
+	@echo Building libcrypto
+	cd build/deps/openssl && \
+		./config -fPIC no-md2 no-rc5 no-rfc3779 no-sctp no-ssl-trace no-zlib no-hw no-mdc2 no-seed no-idea \
+			no-camellia no-bf no-dsa no-ssl3 no-capieng \
+			-DSSL_FORBID_ENULL -DOPENSSL_NO_DTLS1 -DOPENSSL_NO_HEARTBEATS \
+			--prefix=$(INSTALL_DIR) --openssldir=$(INSTALL_DIR) && \
+		make -j && \
+		make install_sw
+
+
+CMAKE_CONFIGURE = cmake -DCMAKE_INSTALL_PREFIX=$(INSTALL_DIR) -DCMAKE_PREFIX_PATH=$(INSTALL_DIR) -DBUILD_TESTING=OFF
+CMAKE_BUILD = cmake --build
+CMAKE_BUILD_TYPE ?= RelWithDebInfo
+CMAKE_TARGET = --config $CMAKE_BUILD_TYPE --target install
+
+build/aws-c-common/CMakeCache.txt: $(INSTALL_DIR)/lib/libcrypto.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-common -Bbuild/aws-c-common
+
+$(INSTALL_DIR)/lib/libaws-c-common.a: build/aws-c-common/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-common $(CMAKE_TARGET)
+
+build/s2n/CMakeCache.txt: $(INSTALL_DIR)/lib/libcrypto.a
+	$(CMAKE_CONFIGURE) -Hcrt/s2n -Bbuild/s2n
+
+$(INSTALL_DIR)/lib/libs2n.a: build/s2n/CMakeCache.txt
+	$(CMAKE_BUILD) build/s2n $(CMAKE_TARGET)
+
+build/aws-c-io/CMakeCache.txt: $(INSTALL_DIR)/lib/libaws-c-common.a $(INSTALL_DIR)/lib/libcrypto.a $(INSTALL_DIR)/lib/libs2n.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-io -Bbuild/aws-c-io
+
+$(INSTALL_DIR)/lib/libaws-c-io.a: build/aws-c-io/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-io $(CMAKE_TARGET)
+
+build/aws-c-cal/CMakeCache.txt: $(INSTALL_DIR)/lib/libaws-c-common.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-cal -Bbuild/aws-c-cal
+
+$(INSTALL_DIR)/lib/libaws-c-cal.a: build/aws-c-cal/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-cal $(CMAKE_TARGET)
+
+build/aws-c-compression/CMakeCache.txt: $(INSTALL_DIR)/lib/libaws-c-common.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-compression -Bbuild/aws-c-compression
+
+$(INSTALL_DIR)/lib/libaws-c-compression.a: build/aws-c-compression/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-compression $(CMAKE_TARGET)
+
+build/aws-c-http/CMakeCache.txt: $(INSTALL_DIR)/lib/libaws-c-compression.a $(INSTALL_DIR)/lib/libaws-c-io.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-http -Bbuild/aws-c-http
+
+$(INSTALL_DIR)/lib/libaws-c-http.a: build/aws-c-http/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-http $(CMAKE_TARGET)
+
+build/aws-c-auth/CMakeCache.txt: $(INSTALL_DIR)/lib/libaws-c-http.a
+	$(CMAKE_CONFIGURE) -Hcrt/aws-c-auth -Bbuild/aws-c-auth
+
+$(INSTALL_DIR)/lib/libaws-c-auth.a: build/aws-c-auth/CMakeCache.txt
+	$(CMAKE_BUILD) build/aws-c-auth $(CMAKE_TARGET)
+
+# Force the crt object target to depend on all of the libraries above
+src/crt.lo: crt-static
diff --git a/config.m4 b/config.m4
index b0ff2a4..c087559 100644
--- a/config.m4
+++ b/config.m4
@@ -6,25 +6,18 @@ dnl
 PHP_ARG_WITH(awscrt)
 
 if test "$PHP_AWSCRT" != "no"; then
-    AC_MSG_CHECKING([for libcrypto])
-    for search_path in "$AWS_LIBCRYTO_INSTALL" "$PHP_AWSCRT/build/deps/openssl" /opt/openssl /usr/local /usr; do
-        if test -f "$search_path/include/openssl/crypto.h"; then
-            LIBCRYPTO_PATH=$search_path
-            break
-        fi
-    done
-    if test -z "$LIBCRYPTO_PATH"; then
-        AC_MSG_ERROR([not found])
-    fi
+    # force lib paths to be absolute, or PHP will mangle them
+    cwd=`pwd`
+    CRT_LIBPATHS="-L${cwd}/build/install/lib64 -L${cwd}/build/install/lib"
+    CRT_LIBS="-laws-c-auth -laws-c-http -laws-c-cal -laws-c-io -laws-c-compression -laws-c-common -ls2n -l:libcrypto.a"
+    PHP_EVAL_LIBLINE([$CRT_LIBPATHS $CRT_LIBS], AWSCRT_SHARED_LIBADD)
 
-    AC_MSG_RESULT([found at $LIBCRYPTO_PATH])
-
-    PHP_ADD_INCLUDE($LIBCRYPTO_PATH/include)
-    dnl PHP_ADD_LIBPATH($LIBCRYPTO_PATH/lib)
-    PHP_ADD_LIBRARY_WITH_PATH(:libcrypto.a, $LIBCRYPTO_PATH/lib, AWSCRT_SHARED_LIBADD)
-
-    AWSCRT_SOURCES=src/*.c
-
-    PHP_NEW_EXTENSION(awscrt, $AWSCRT_SOURCES, $ext_shared)
+    # Shoves the linker line into the Makefile
     PHP_SUBST(AWSCRT_SHARED_LIBADD)
+
+    # Sources for the PHP extension itself
+    AWSCRT_SOURCES=src/*.c
+    PHP_NEW_EXTENSION(awscrt, $AWSCRT_SOURCES, $ext_shared)
 fi
+
+PHP_ADD_MAKEFILE_FRAGMENT
diff --git a/crt/aws-c-auth b/crt/aws-c-auth
new file mode 160000
index 0000000..a492570
--- /dev/null
+++ b/crt/aws-c-auth
@@ -0,0 +1 @@
+Subproject commit a492570cfd0708b56df9efdbf85dfa64ee16579d
diff --git a/crt/aws-c-cal b/crt/aws-c-cal
new file mode 160000
index 0000000..df5da3a
--- /dev/null
+++ b/crt/aws-c-cal
@@ -0,0 +1 @@
+Subproject commit df5da3af5b8cb2ad70cb591504bb25d6a74f3ab4
diff --git a/crt/aws-c-common b/crt/aws-c-common
new file mode 160000
index 0000000..1efe886
--- /dev/null
+++ b/crt/aws-c-common
@@ -0,0 +1 @@
+Subproject commit 1efe886005caa9568b132f34ba93cce8c4a4bc1e
diff --git a/crt/aws-c-compression b/crt/aws-c-compression
new file mode 160000
index 0000000..826d92c
--- /dev/null
+++ b/crt/aws-c-compression
@@ -0,0 +1 @@
+Subproject commit 826d92cc39ea4c4a1a2a0ca5dccfdf9397c9a9f4
diff --git a/crt/aws-c-http b/crt/aws-c-http
new file mode 160000
index 0000000..cad6279
--- /dev/null
+++ b/crt/aws-c-http
@@ -0,0 +1 @@
+Subproject commit cad62791f14396479e683122ce0ddb7be6967d54
diff --git a/crt/aws-c-io b/crt/aws-c-io
new file mode 160000
index 0000000..7012798
--- /dev/null
+++ b/crt/aws-c-io
@@ -0,0 +1 @@
+Subproject commit 701279844ae43f9d275171bbdc80fcb1ba5a0065
diff --git a/crt/s2n b/crt/s2n
new file mode 160000
index 0000000..2a7cebb
--- /dev/null
+++ b/crt/s2n
@@ -0,0 +1 @@
+Subproject commit 2a7cebb0d7c00f5577629c9372cc1e4688cbb774