cmake: fix missing working directory for version header generation

pcolberg · pcolberg · commit 950f21dd079d · 2021-10-25T13:02:27.000-04:00
By default `add_custom_command` runs in the current build directory.

This resolves "Commit UNKNOWN" in the generated version header when
the build directory is not a subdirectory of the git working tree.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -134,6 +134,7 @@ add_custom_command(
     -D "GIT_FOUND=${GIT_FOUND}"
     -D "GIT_EXECUTABLE=${GIT_EXECUTABLE}"
     -P "${CMAKE_CURRENT_LIST_DIR}/cmake/scripts/version.cmake"
+  WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
 )
 
 add_library(acl_objs OBJECT

Original file line number	Diff line number	Diff line change
`@@ -134,6 +134,7 @@ add_custom_command(`
`134`	`134`	`-D "GIT_FOUND=${GIT_FOUND}"`
`135`	`135`	`-D "GIT_EXECUTABLE=${GIT_EXECUTABLE}"`
`136`	`136`	`-P "${CMAKE_CURRENT_LIST_DIR}/cmake/scripts/version.cmake"`
	`137`	`+ WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"`
`137`	`138`	`)`
`138`	`139`
`139`	`140`	`add_library(acl_objs OBJECT`