message: build snappy static
diff: @@ -7,10 +7,6 @@ project(Snappy VERSION 1.1.7 LANGUAGES C CXX)
  ospray_disable_compiler_warnings()
  ##############################################################################
  -# BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
  -# it prominent in the GUI.
  -option(BUILD_SHARED_LIBS "Build shared libraries(DLLs)." OFF)
  -
  option(SNAPPY_BUILD_TESTS "Build Snappy's own tests." OFF)
  include(TestBigEndian)
  @@ -78,7 +74,7 @@ configure_file(
  "${PROJECT_SOURCE_DIR}/snappy-stubs-public.h.in"
  "${PROJECT_BINARY_DIR}/snappy-stubs-public.h")
  -add_library(snappy "")
  +add_library(snappy STATIC "")
  target_sources(snappy
  PRIVATE
  "${PROJECT_SOURCE_DIR}/snappy-internal.h"
  @@ -110,9 +106,6 @@ set_target_properties(snappy
  PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
  target_compile_definitions(snappy PRIVATE -DHAVE_CONFIG_H)
  -if(BUILD_SHARED_LIBS)
  - set_target_properties(snappy PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
  -endif(BUILD_SHARED_LIBS)
  if(SNAPPY_BUILD_TESTS)
  enable_testing()
  