Install headers in build dir for examples

Author: alexcrichton

crates/c-api/CMakeLists.txt

@@ -96,9 +96,9 @@ else()
     endif()
 endif()
 
-target_include_directories(wasmtime INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include)
-
 target_include_directories(wasmtime INTERFACE ${CMAKE_BINARY_DIR}/include)
+set(WASMTIME_HEADER_DST ${CMAKE_BINARY_DIR}/include)
+include(cmake/install-headers.cmake)
 
 include(GNUInstallDirs)
 install(SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/cmake/install-headers.cmake)

crates/c-api/cmake/install-headers.cmake

@@ -2,8 +2,11 @@ cmake_minimum_required(VERSION 3.12)
 
 include(${CMAKE_CURRENT_LIST_DIR}/features.cmake)
 
-set(dst "${CMAKE_INSTALL_PREFIX}/include")
-message(STATUS "dst: ${dst}")
+if(WASMTIME_HEADER_DST)
+  set(dst "${WASMTIME_HEADER_DST}")
+else()
+  set(dst "${CMAKE_INSTALL_PREFIX}/include")
+endif()
 set(include_src "${CMAKE_CURRENT_LIST_DIR}/../include")
 
 message(STATUS "Installing: ${dst}/wasmtime/conf.h")