build: add dtrace USDT probe support

[compnerd]

Add the missing support for dtrace header script support.

[compnerd]

@dgrove-oss does this work for you? (I dont have dtrace installed, so if you could test this, it would be wonderful)

[dgrove-oss]

Almost, you need to add the directory in which provider.h is generated to the includes. With the additional patch below it works for me.

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ca6ef75..bdc9162 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -115,6 +115,7 @@ endif()
 target_include_directories(dispatch
                            PRIVATE
                              ${CMAKE_BINARY_DIR}
+                             ${CMAKE_CURRENT_BINARY_DIR}
                              ${CMAKE_SOURCE_DIR}
                              ${CMAKE_CURRENT_SOURCE_DIR}
                              ${CMAKE_SOURCE_DIR}/private)

[compnerd]

@dgrove-oss updated

[das]

awesome, thanks!