From ff55af14f98fc70895ccdbbb4dccdccd68dec9dd Mon Sep 17 00:00:00 2001
From: Ahmad Fatoum <ahmad@a3f.at>
Date: Sun, 20 May 2018 20:08:43 +0200
Subject: CMake: Move reusable code to new cmake/ directory

---
 cmake/AddIfFlagCompiles.cmake             | 12 ++++++++++++
 cmake/CheckFileSystemSymlinkSupport.cmake | 13 +++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 cmake/AddIfFlagCompiles.cmake
 create mode 100644 cmake/CheckFileSystemSymlinkSupport.cmake

(limited to 'cmake')

diff --git a/cmake/AddIfFlagCompiles.cmake b/cmake/AddIfFlagCompiles.cmake
new file mode 100644
index 00000000..403607b5
--- /dev/null
+++ b/cmake/AddIfFlagCompiles.cmake
@@ -0,0 +1,12 @@
+include(CheckCCompilerFlag)
+function(add_if_flag_compiles flag)
+  CHECK_C_COMPILER_FLAG("${flag}" COMPILER_HAS_THOSE_TOGGLES)
+  set(outcome "Failed")
+  if(COMPILER_HAS_THOSE_TOGGLES)
+    foreach(var ${ARGN})
+      set(${var} "${flag} ${${var}}" PARENT_SCOPE)
+    endforeach()
+    set(outcome "compiles")
+  endif()
+  message(STATUS "Testing if ${flag} can be used -- ${outcome}")
+endfunction()
diff --git a/cmake/CheckFileSystemSymlinkSupport.cmake b/cmake/CheckFileSystemSymlinkSupport.cmake
new file mode 100644
index 00000000..798840ef
--- /dev/null
+++ b/cmake/CheckFileSystemSymlinkSupport.cmake
@@ -0,0 +1,13 @@
+# Populates a ${FILESYSTEM_LACKS_SYMLINKS} variable
+message(STATUS "Testing if file system supports symlinks")
+execute_process(
+  COMMAND ${CMAKE_COMMAND} -E create_symlink CMakeLists.txt "${CMAKE_CURRENT_BINARY_DIR}/TestingIfSymlinkWorks"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    RESULT_VARIABLE FILESYSTEM_LACKS_SYMLINKS
+)
+If (FILESYSTEM_LACKS_SYMLINKS)
+  message(STATUS "Testing if file system supports symlinks -- unsupported")
+else()
+  message(STATUS "Testing if file system supports symlinks -- supported")
+endif()
+
-- 
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