diff --git a/eccrypto.cpp b/eccrypto.cpp
index 60a86b66..e13b643f 100644
--- a/eccrypto.cpp
+++ b/eccrypto.cpp
@@ -28,6 +28,11 @@
 #include "ec2n.h"
 #include "misc.h"
 
+// Squash MS LNK4221 and libtool warnings
+#ifndef CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES
+extern const char ECCRYPTO_FNAME[] = __FILE__;
+#endif
+
 NAMESPACE_BEGIN(CryptoPP)
 
 #if 0
diff --git a/neon-simd.cpp b/neon-simd.cpp
index bb10a308..72d86fc0 100644
--- a/neon-simd.cpp
+++ b/neon-simd.cpp
@@ -30,6 +30,9 @@
 # define EXCEPTION_EXECUTE_HANDLER 1
 #endif
 
+// Squash MS LNK4221 and libtool warnings
+extern const char NEON_SIMD_FNAME[] = __FILE__;
+
 NAMESPACE_BEGIN(CryptoPP)
 
 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
diff --git a/ppc-simd.cpp b/ppc-simd.cpp
index 7b3158e8..51c5d3d4 100644
--- a/ppc-simd.cpp
+++ b/ppc-simd.cpp
@@ -37,6 +37,9 @@
 # define EXCEPTION_EXECUTE_HANDLER 1
 #endif
 
+// Squash MS LNK4221 and libtool warnings
+extern const char PPC_SIMD_FNAME[] = __FILE__;
+
 NAMESPACE_BEGIN(CryptoPP)
 
 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
diff --git a/rijndael-simd.cpp b/rijndael-simd.cpp
index ef8a4ade..893f2905 100644
--- a/rijndael-simd.cpp
+++ b/rijndael-simd.cpp
@@ -66,6 +66,9 @@
 #define M128_CAST(x) ((__m128i *)(void *)(x))
 #define CONST_M128_CAST(x) ((const __m128i *)(const void *)(x))
 
+// Squash MS LNK4221 and libtool warnings
+extern const char RIJNDAEL_SIMD_FNAME[] = __FILE__;
+
 NAMESPACE_BEGIN(CryptoPP)
 
 #ifdef CRYPTOPP_GNU_STYLE_INLINE_ASSEMBLY
diff --git a/sha-simd.cpp b/sha-simd.cpp
index 419d0611..5b097d3f 100644
--- a/sha-simd.cpp
+++ b/sha-simd.cpp
@@ -45,6 +45,9 @@
 #define M128_CAST(x) ((__m128i *)(void *)(x))
 #define CONST_M128_CAST(x) ((const __m128i *)(const void *)(x))
 
+// Squash MS LNK4221 and libtool warnings
+extern const char SHA_SIMD_FNAME[] = __FILE__;
+
 NAMESPACE_BEGIN(CryptoPP)
 
 // ***************** SIGILL probes ********************
diff --git a/sse-simd.cpp b/sse-simd.cpp
index 7da3796a..af07048e 100644
--- a/sse-simd.cpp
+++ b/sse-simd.cpp
@@ -27,6 +27,9 @@
 # include <emmintrin.h>
 #endif
 
+// Squash MS LNK4221 and libtool warnings
+extern const char SSE_SIMD_FNAME[] = __FILE__;
+
 NAMESPACE_BEGIN(CryptoPP)
 
 #ifndef CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
diff --git a/strciphr.cpp b/strciphr.cpp
index 6aae6318..8d72b347 100644
--- a/strciphr.cpp
+++ b/strciphr.cpp
@@ -6,6 +6,11 @@
 
 #include "strciphr.h"
 
+// Squash MS LNK4221 and libtool warnings
+#ifndef CRYPTOPP_MANUALLY_INSTANTIATE_TEMPLATES
+extern const char STRCIPHER_FNAME[] = __FILE__;
+#endif
+
 NAMESPACE_BEGIN(CryptoPP)
 
 template <class S>