include: Only require LIBSSH_STATIC on Windows.

include/libssh/libssh.h

@@ -22,10 +22,10 @@
 #ifndef _LIBSSH_H
 #define _LIBSSH_H
 
-#ifdef LIBSSH_STATIC
-  #define LIBSSH_API
-#else
-  #if defined _WIN32 || defined __CYGWIN__
+#if defined _WIN32 || defined __CYGWIN__
+  #ifdef LIBSSH_STATIC
+    #define LIBSSH_API
+  #else
     #ifdef LIBSSH_EXPORTS
       #ifdef __GNUC__
         #define LIBSSH_API __attribute__((dllexport))
@@ -39,12 +39,12 @@
         #define LIBSSH_API __declspec(dllimport)
       #endif
     #endif
+  #endif
+#else
+  #if __GNUC__ >= 4
+    #define LIBSSH_API __attribute__((visibility("default")))
   #else
-    #if __GNUC__ >= 4
-      #define LIBSSH_API __attribute__((visibility("default")))
-    #else
-      #define LIBSSH_API
-    #endif
+    #define LIBSSH_API
   #endif
 #endif
 

src/CMakeLists.txt

@@ -190,10 +190,17 @@ if (WITH_STATIC_LIB)
           ${LIBRARY_SOVERSION}
         OUTPUT_NAME
           ssh
-        COMPILE_FLAGS
-          "-DLIBSSH_STATIC"
   )
 
+  if (WIN32)
+    set_target_properties(
+      ${LIBSSH_STATIC_LIBRARY}
+        PROPERTIES
+          COMPILE_FLAGS
+            "-DLIBSSH_STATIC"
+    )
+  endif (WIN32)
+
   install(
     TARGETS
       ${LIBSSH_STATIC_LIBRARY}