diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca4cba2..2018d35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@
 if(PERL_FOUND)
 
     # If NULL Entropy is configured, display an appropriate warning
-    execute_process(COMMAND ${PERL_EXECUTABLE} ${CMAKE_SOURCE_DIR}/scripts/config.pl -f ${CMAKE_SOURCE_DIR}/include/mbedtls/config.h get MBEDTLS_TEST_NULL_ENTROPY
+    execute_process(COMMAND ${PERL_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/scripts/config.pl -f ${CMAKE_CURRENT_SOURCE_DIR}/include/mbedtls/config.h get MBEDTLS_TEST_NULL_ENTROPY
                         RESULT_VARIABLE result)
     if(${result} EQUAL 0)
         message(WARNING ${NULL_ENTROPY_WARNING})
diff --git a/ChangeLog b/ChangeLog
index 0a01c55..4533644 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,11 +11,16 @@
      Fixes #825.
 
 Bugfix
+   * Fix spurious uninitialized variable warning in cmac.c. Fix independently
+     contributed by Brian J Murray and David Brown.
    * Add missing dependencies in test suites that led to build failures
      in configurations that omit certain hashes or public-key algorithms.
      Fixes #1040.
 
 Changes
+   * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub.
+   * Support cmake build where Mbed TLS is a subproject. Fix
+     contributed independently by Matthieu Volat and Arne Schwabe.
    * Improve testing in configurations that omit certain hashes or
      public-key algorithms. Includes contributions by Gert van Dijk.
    * Improve negative testing of X.509 parsing.
diff --git a/include/mbedtls/rsa_internal.h b/include/mbedtls/rsa_internal.h
index bcb3c94..12e0f6b 100644
--- a/include/mbedtls/rsa_internal.h
+++ b/include/mbedtls/rsa_internal.h
@@ -213,4 +213,8 @@
                               const mbedtls_mpi *D,  const mbedtls_mpi *DP,
                               const mbedtls_mpi *DQ, const mbedtls_mpi *QP );
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* rsa_internal.h */
diff --git a/library/bignum.c b/library/bignum.c
index 9f13da4..ff72d30 100644
--- a/library/bignum.c
+++ b/library/bignum.c
@@ -963,7 +963,7 @@
     while( c != 0 )
     {
         z = ( *d < c ); *d -= c;
-        c = z; i++; d++;
+        c = z; d++;
     }
 }
 
@@ -1201,8 +1201,8 @@
     MBEDTLS_MPI_CHK( mbedtls_mpi_grow( X, i + j ) );
     MBEDTLS_MPI_CHK( mbedtls_mpi_lset( X, 0 ) );
 
-    for( i++; j > 0; j-- )
-        mpi_mul_hlp( i - 1, A->p, X->p + j - 1, B->p[j - 1] );
+    for( ; j > 0; j-- )
+        mpi_mul_hlp( i, A->p, X->p + j - 1, B->p[j - 1] );
 
     X->s = A->s * B->s;
 
diff --git a/library/cmac.c b/library/cmac.c
index 9dbff90..a4a2106 100644
--- a/library/cmac.c
+++ b/library/cmac.c
@@ -771,7 +771,7 @@
                               int block_size,
                               int num_tests )
 {
-    int i, ret;
+    int i, ret = 0;
     mbedtls_cipher_context_t ctx;
     const mbedtls_cipher_info_t *cipher_info;
     unsigned char K1[MBEDTLS_CIPHER_BLKSIZE_MAX];
@@ -853,7 +853,7 @@
                                  int num_tests )
 {
     const mbedtls_cipher_info_t *cipher_info;
-    int i, ret;
+    int i, ret = 0;
     unsigned char output[MBEDTLS_CIPHER_BLKSIZE_MAX];
 
     cipher_info = mbedtls_cipher_info_from_type( cipher_type );
diff --git a/library/pem.c b/library/pem.c
index ac86d7e..13f9208 100644
--- a/library/pem.c
+++ b/library/pem.c
@@ -403,7 +403,7 @@
          * The result will be ASN.1 starting with a SEQUENCE tag, with 1 to 3
          * length bytes (allow 4 to be sure) in all known use cases.
          *
-         * Use that as heurisitic to try detecting password mismatchs.
+         * Use that as a heuristic to try to detect password mismatches.
          */
         if( len <= 2 || buf[0] != 0x30 || buf[1] > 0x83 )
         {
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 88864b8..738014e 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -938,7 +938,7 @@
 #endif
 
     /*
-     * We don't support compression with DTLS right now: is many records come
+     * We don't support compression with DTLS right now: if many records come
      * in the same datagram, uncompressing one could overwrite the next one.
      * We don't want to add complexity for handling that case unless there is
      * an actual need for it.