build: There is no need to check for system libraries on Linux.

CMakeLists.txt

@@ -29,6 +29,7 @@ set(CMAKE_MODULE_PATH
 
 # add definitions
 include(DefineCMakeDefaults)
+include(DefinePlatformDefaults)
 include(DefineCompilerFlags)
 include(DefineInstallationPaths)
 include(DefineOptions.cmake)

ConfigureChecks.cmake

@@ -81,33 +81,35 @@ if (WIN32)
 endif (WIN32)
 
 if (UNIX)
-  # libsocket (Solaris)
-  check_library_exists(socket getaddrinfo "" HAVE_LIBSOCKET)
-  if (HAVE_LIBSOCKET)
-    set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} socket)
-  endif (HAVE_LIBSOCKET)
-  # libnsl (Solaris)
-  check_library_exists(nsl gethostbyname "" HAVE_LIBNSL)
-  if (HAVE_LIBNSL)
-    set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} nsl)
-  endif (HAVE_LIBNSL)
-  # libresolv
-  check_library_exists(resolv hstrerror "" HAVE_LIBRESOLV)
-  if (HAVE_LIBRESOLV)
-    set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} resolv)
-  endif (HAVE_LIBRESOLV)
-  check_library_exists(rt nanosleep "" HAVE_LIBRT)
-  # librt
-  if (HAVE_LIBRT)
-    set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} rt)
-  endif (HAVE_LIBRT)
+    if (NOT LINUX)
+        # libsocket (Solaris)
+        check_library_exists(socket getaddrinfo "" HAVE_LIBSOCKET)
+        if (HAVE_LIBSOCKET)
+          set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} socket)
+        endif (HAVE_LIBSOCKET)
+        # libnsl (Solaris)
+        check_library_exists(nsl gethostbyname "" HAVE_LIBNSL)
+        if (HAVE_LIBNSL)
+          set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} nsl)
+        endif (HAVE_LIBNSL)
+        # libresolv
+        check_library_exists(resolv hstrerror "" HAVE_LIBRESOLV)
+        if (HAVE_LIBRESOLV)
+          set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} resolv)
+        endif (HAVE_LIBRESOLV)
+        check_library_exists(rt nanosleep "" HAVE_LIBRT)
+        # librt
+        if (HAVE_LIBRT)
+          set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} rt)
+        endif (HAVE_LIBRT)
+    endif (NOT LINUX)
 
-  check_function_exists(getaddrinfo HAVE_GETADDRINFO)
-  check_function_exists(gethostbyname HAVE_GETHOSTBYNAME)
-  check_function_exists(poll HAVE_POLL)
-  check_function_exists(select HAVE_SELECT)
-  check_function_exists(cfmakeraw HAVE_CFMAKERAW)
-  check_function_exists(regcomp HAVE_REGCOMP)
+    check_function_exists(getaddrinfo HAVE_GETADDRINFO)
+    check_function_exists(gethostbyname HAVE_GETHOSTBYNAME)
+    check_function_exists(poll HAVE_POLL)
+    check_function_exists(select HAVE_SELECT)
+    check_function_exists(cfmakeraw HAVE_CFMAKERAW)
+    check_function_exists(regcomp HAVE_REGCOMP)
 endif (UNIX)
 
 set(LIBSSH_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CACHE INTERNAL "libssh required system libraries")