[OpenMP] Fix missing CMake function in runtimes build

jhuber6 · jhuber6 · commit ca007181eadf · 2023-11-27T09:23:15.000-06:00
Summary:
We borrowed this function from LLVM, my previous patch removed that. Now
we redefine it if it's not present.
diff --git a/openmp/cmake/HandleOpenMPOptions.cmake b/openmp/cmake/HandleOpenMPOptions.cmake
@@ -1,4 +1,4 @@
-if (OPENMP_STANDALONE_BUILD)
+if (NOT COMMAND append_if)
   # From HandleLLVMOptions.cmake
   function(append_if condition value)
     if (${condition})

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-if (OPENMP_STANDALONE_BUILD)`
	`1`	`+if (NOT COMMAND append_if)`
`2`	`2`	`# From HandleLLVMOptions.cmake`
`3`	`3`	`function(append_if condition value)`
`4`	`4`	`if (${condition})`