Add options to run include-what-you-use with the compiler

Create a <LANG>_INCLUDE_WHAT_YOU_USE target property (initialized by a
CMAKE_<LANG>_INCLUDE_WHAT_YOU_USE variable) to specify an IWYU command
line to be run along with the compiler.

1 files changed, 7 insertions, 0 deletions

diff --git a/Tests/RunCMake/pseudo_iwyu.c b/Tests/RunCMake/pseudo_iwyu.c
new file mode 100644
index 0000000..1e25de7
--- /dev/null
+++ b/Tests/RunCMake/pseudo_iwyu.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(void)
+{
+  fprintf(stderr, "should add these lines:\n#include <...>\n");
+  return 0;
+}