libraries/sdformat: Patch for cmake >= 3.9.x.

For this version, upstream code is already fixed

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

libraries/sdformat/cmake.patch

@@ -0,0 +1,20 @@
+diff -Naur osrf-sdformat-e5ac5aaa49f2.orig/CMakeLists.txt osrf-sdformat-e5ac5aaa49f2/CMakeLists.txt
+--- osrf-sdformat-e5ac5aaa49f2.orig/CMakeLists.txt	2016-10-10 23:51:37.000000000 +0200
++++ osrf-sdformat-e5ac5aaa49f2/CMakeLists.txt	2017-07-29 19:46:16.021921859 +0200
+@@ -186,11 +186,13 @@
+ # OS Specific initialization
+ if (UNIX)
+   sdf_setup_unix()
+-else (WIN32)
++endif ()
++if (WIN32)
+   sdf_setup_windows()
+-else (APPLE)
++endif ()
++if (APPLE)
+   sdf_setup_apple()
+-endif()
++endif ()
+ 
+ #################################################
+ # Print warnings and errors

libraries/sdformat/sdformat.SlackBuild

@@ -71,6 +71,9 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+# Patch for cmake >= 3.9.x
+patch -p1 < $CWD/cmake.patch
+
 mkdir -p build
 cd build
   cmake \