From e4931a74f7b84344327e76a052ef97edc93d39fa Mon Sep 17 00:00:00 2001
From: Keith Rothman <537074+litghost@users.noreply.github.com>
Date: Mon, 15 Feb 2021 09:52:57 -0800
Subject: Enable out of source build directory.

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
---
 cmake/cxx_static/CMakeLists.txt | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'cmake')

diff --git a/cmake/cxx_static/CMakeLists.txt b/cmake/cxx_static/CMakeLists.txt
index e5cfecb..5e7489f 100644
--- a/cmake/cxx_static/CMakeLists.txt
+++ b/cmake/cxx_static/CMakeLists.txt
@@ -20,6 +20,16 @@ add_custom_target(
 set(CAPNPC_IMPORT_DIRS)
 list(APPEND CAPNPC_IMPORT_DIRS ${CMAKE_CURRENT_BINARY_DIR}/schema)
 
+set(CAPNPC_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/../../interchange")
+
+add_custom_command(
+    OUTPUT ${CAPNPC_OUTPUT_DIR}
+    COMMAND ${CMAKE_COMMAND} -E make_directory ${CAPNPC_OUTPUT_DIR}
+    )
+add_custom_target(
+    fpga_interchange_capnp_output_directory
+    DEPENDS ${CAPNPC_OUTPUT_DIR})
+
 set(CAPNPC_SRC_PREFIX ${INTERCHANGE_SCHEMA_DIR})
 set(CAPNP_SRCS)
 set(CAPNP_HDRS)
@@ -29,8 +39,10 @@ foreach (proto ${PROTOS})
     list(APPEND CAPNP_SRCS ${CAPNP_SRC})
 endforeach()
 add_library(fpga_interchange_capnp STATIC ${CAPNP_SRCS})
-add_dependencies(fpga_interchange_capnp get_java_capnp_schema)
+add_dependencies(fpga_interchange_capnp
+    get_java_capnp_schema
+    fpga_interchange_capnp_output_directory)
 target_link_libraries(fpga_interchange_capnp PRIVATE CapnProto::capnp)
 
-get_filename_component(FPGA_INTERCHANGE_CAPNP_INCLUDE_DIR "${CMAKE_CURRENT_BINARY_DIR}/../../interchange" ABSOLUTE)
+get_filename_component(FPGA_INTERCHANGE_CAPNP_INCLUDE_DIR "${CAPNPC_OUTPUT_DIR}" ABSOLUTE)
 target_include_directories(fpga_interchange_capnp INTERFACE ${FPGA_INTERCHANGE_CAPNP_INCLUDE_DIR})
-- 
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