Fix building on Solaris 10 x86_64 GCC 4.9.2

Prevent building x86_64 ASM from Solaris x86_64

Author: likema

build/cmake/lib/CMakeLists.txt

@@ -42,7 +42,10 @@ if (MSVC)
     file(GLOB DecompressSources ${LIBRARY_DIR}/decompress/*.c)
     add_compile_options(-DZSTD_DISABLE_ASM)
 else ()
-    file(GLOB DecompressSources ${LIBRARY_DIR}/decompress/*.c ${LIBRARY_DIR}/decompress/*.S)
+    file(GLOB DecompressSources ${LIBRARY_DIR}/decompress/*.c)
+    if (CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64" AND NOT CMAKE_SYSTEM_NAME STREQUAL "SunOS")
+        file(GLOB DecompressASMSources ${LIBRARY_DIR}/decompress/*.S)
+    endif ()
 endif ()
 file(GLOB DictBuilderSources ${LIBRARY_DIR}/dictBuilder/*.c)
 file(GLOB DeprecatedSources ${LIBRARY_DIR}/deprecated/*.c)
@@ -60,7 +63,7 @@ if (ZSTD_BUILD_COMPRESSION)
     set(Headers ${Headers} ${CompressHeaders})
 endif()
 if (ZSTD_BUILD_DECOMPRESSION)
-    set(Sources ${Sources} ${DecompressSources})
+    set(Sources ${Sources} ${DecompressSources} ${DecompressASMSources})
     set(Headers ${Headers} ${DecompressHeaders})
 endif()
 if (ZSTD_BUILD_DICTBUILDER)