cmake: fix for <cmake-3.4

2018-06-22 17:05:55 -06:00
parent ce0f3daad6
commit 264e4fd3b1
1 changed files with 3 additions and 0 deletions
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@ -461,6 +461,9 @@ endforeach(HEADER)
 set(MATH_LIBRARIES "m" CACHE STRING "math library")
 mark_as_advanced( MATH_LIBRARIES )
 include(CheckLibraryExists)
+if (CMAKE_VERSION VERSION_LESS "3.4")
+  enable_language(C) # check_library_exists isn't support with a c compiler before v3.4
+endif()
 foreach(FUNC sin cos)
  check_library_exists(${MATH_LIBRARIES} ${FUNC} "" FOUND_${FUNC}_${MATH_LIBRARIES})
  if(NOT FOUND_${FUNC}_${MATH_LIBRARIES})