ability create static library

add msvc "/Wall"

CMakeLists.txt

@@ -13,19 +13,55 @@ set(SO_MAJOR 2)
 set(SO_MINOR 0)
 set(SO_PATCH 2)
 
-add_definitions (
-  -DUTF8PROC_EXPORTS
-)
+# configure build type
+
+set(_utf8proc_is_set_build_shared_libs TRUE)
+if(DEFINED BUILD_SHARED_LIBS)
+  set(_utf8proc_is_set_build_shared_libs ${BUILD_SHARED_LIBS})
+endif(DEFINED BUILD_SHARED_LIBS)
+
+set(UTF8PROC_BUILD_AS_SHARED ${_utf8proc_is_set_build_shared_libs} CACHE BOOL "If present and true, this will cause utf8proc to be built shared unless the utf8proc was explicitly added as a static library.")
+
+# set additional defined
 
-if (NOT MSVC)
+if(NOT DEFINED _utf8proc_additional_defined)
+  set(_utf8proc_additional_defined )
+endif(NOT DEFINED _utf8proc_additional_defined)
+
+if(UTF8PROC_BUILD_AS_SHARED)
+  list(APPEND _utf8proc_additional_defined 
+    "-DUTF8PROC_EXPORTS"
+  )
+  set(_utf8proc_build_type "SHARED")
+else(UTF8PROC_BUILD_AS_SHARED)
+  list(APPEND _utf8proc_additional_defined 
+    "-DUTF8PROC_BUILD_AS_LIB"
+  )
+  set(_utf8proc_build_type "STATIC")
+endif(UTF8PROC_BUILD_AS_SHARED)
+list(REMOVE_DUPLICATES _utf8proc_additional_defined)
+add_definitions("${_utf8proc_additional_defined}")
+
+# other config
+
+if(NOT MSVC)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -std=c99 -pedantic -Wall")
-endif ()
+endif()
 
-add_library (utf8proc
+add_library (utf8proc ${_utf8proc_build_type}
   utf8proc.c
   utf8proc.h
 )
 
+if(MSVC)
+  get_target_property(_utf8proc_msvc_build_prop_val utf8proc COMPILE_FLAGS)
+  if(${_utf8proc_msvc_build_prop_val} STREQUAL "_utf8proc_msvc_build_prop_val-NOTFOUND")
+    set_target_properties(utf8proc PROPERTIES COMPILE_FLAGS "/Wall")
+  else(${_utf8proc_msvc_build_prop_val} STREQUAL "_utf8proc_msvc_build_prop_val-NOTFOUND")
+    set_target_properties(utf8proc PROPERTIES COMPILE_FLAGS "${_utf8proc_msvc_build_prop_val} /Wall")
+  endif(${_utf8proc_msvc_build_prop_val} STREQUAL "_utf8proc_msvc_build_prop_val-NOTFOUND")
+endif()
+
 set_target_properties (utf8proc PROPERTIES
   POSITION_INDEPENDENT_CODE ON
   VERSION "${SO_MAJOR}.${SO_MINOR}.${SO_PATCH}"

utf8proc.h

@@ -113,16 +113,24 @@ typedef bool utf8proc_bool;
 #endif
 #include <limits.h>
 
-#ifdef _WIN32
+#ifndef UTF8PROC_BUILD_AS_LIB
+#  ifdef _WIN32
 #    ifdef UTF8PROC_EXPORTS
 #      define UTF8PROC_DLLEXPORT __declspec(dllexport)
 #    else
 #      define UTF8PROC_DLLEXPORT __declspec(dllimport)
 #    endif
-#elif __GNUC__ >= 4
+#  elif defined(__GNUC__) && __GNUC__ >= 4
 #    define UTF8PROC_DLLEXPORT __attribute__ ((visibility("default")))
+#  else
+#    define UTF8PROC_DLLEXPORT
+#  endif
 #else
+#  if defined(__GNUC__) && __GNUC__ >= 4
+#    define UTF8PROC_DLLEXPORT __attribute__ ((visibility("hidden")))
+#  else
 #    define UTF8PROC_DLLEXPORT
+#  endif
 #endif
 
 #ifdef __cplusplus