diff --git a/appveyor.yml b/appveyor.yml
index b098fd452..742f61206 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -82,8 +82,8 @@
           ECHO Creating artifacts &&
           ECHO %cd% &&
           lib\dll\example\build_package.bat &&
-          cd programs\ && make DEBUGFLAGS= clean zstd &&
-          7z a -tzip -mx9 zstd-win-binary-%PLATFORM%.zip zstd.exe &&
+          make -C programs DEBUGFLAGS= clean zstd &&
+          cd programs\ && 7z a -tzip -mx9 zstd-win-binary-%PLATFORM%.zip zstd.exe &&
           appveyor PushArtifact zstd-win-binary-%PLATFORM%.zip &&
           cp zstd.exe ..\bin\zstd.exe &&
           git clone --depth 1 --branch master https://github.com/facebook/zstd &&
@@ -91,8 +91,8 @@
           git archive --format=tar master -o zstd-src.tar &&
           ..\zstd -19 zstd-src.tar &&
           appveyor PushArtifact zstd-src.tar.zst &&
-          certUtil -hashfile zstd-src.tar.zst SHA256 > zstd-src.sig.sha256 &&
-          appveyor PushArtifact zstd-src.sig.sha256 &&
+          certUtil -hashfile zstd-src.tar.zst SHA256 > zstd-src.tar.zst.sha256.sig &&
+          appveyor PushArtifact zstd-src.tar.zst.sha256.sig &&
           cd ..\..\bin\ &&
           7z a -tzip -mx9 zstd-win-release-%PLATFORM%.zip * &&
           appveyor PushArtifact zstd-win-release-%PLATFORM%.zip
diff --git a/doc/images/linux-4.7-12-mt-compress.png b/doc/images/linux-4.7-12-mt-compress.png
new file mode 100644
index 000000000..c66ac0d5e
Binary files /dev/null and b/doc/images/linux-4.7-12-mt-compress.png differ
diff --git a/doc/images/linux-git-mt-compress.png b/doc/images/linux-git-mt-compress.png
new file mode 100644
index 000000000..538b8a9fc
Binary files /dev/null and b/doc/images/linux-git-mt-compress.png differ
diff --git a/lib/common/compiler.h b/lib/common/compiler.h
index bb8730126..e90a3bcde 100644
--- a/lib/common/compiler.h
+++ b/lib/common/compiler.h
@@ -64,6 +64,9 @@
 #endif
 
 /* target attribute */
+#ifndef __has_attribute
+  #define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
 #if defined(__GNUC__)
 #  define TARGET_ATTRIBUTE(target) __attribute__((__target__(target)))
 #else
@@ -74,7 +77,7 @@
  * Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default.
  */
 #ifndef DYNAMIC_BMI2
-  #if defined(__clang__)    \
+  #if (defined(__clang__) && __has_attribute(__target__)) \
       || (defined(__GNUC__) \
           && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) \
       && (defined(__x86_64__) || defined(_M_X86)) \