[cmake] Check for realpath availability in CMake
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189249 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 681a4d6..3bf7583 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -160,6 +160,7 @@
check_symbol_exists(getrlimit "sys/types.h;sys/time.h;sys/resource.h" HAVE_GETRLIMIT)
check_symbol_exists(posix_spawn spawn.h HAVE_POSIX_SPAWN)
check_symbol_exists(pread unistd.h HAVE_PREAD)
+check_symbol_exists(realpath stdlib.h HAVE_REALPATH)
check_symbol_exists(sbrk unistd.h HAVE_SBRK)
check_symbol_exists(srand48 stdlib.h HAVE_RAND48_SRAND48)
if( HAVE_RAND48_SRAND48 )