Build and download 3rd-party to build dir

Author: kohnech

3rd-party/CMakeLists.txt

@@ -39,7 +39,7 @@ include(ExternalProject)
 ExternalProject_Add(
     plog
     URL ${CMAKE_CURRENT_SOURCE_DIR}/plog-${PLOG_VERSION}.tar.gz
-    INSTALL_DIR ${CMAKE_CURRENT_SOURCE_DIR}/plog-${PLOG_VERSION}
+    INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/plog-${PLOG_VERSION}
     CMAKE_ARGS  -D CMAKE_BUILD_TYPE=Release
                 -D CMAKE_INSTALL_PREFIX=<INSTALL_DIR>
                 -D PLOG_BUILD_SAMPLES=OFF
@@ -50,7 +50,7 @@ ExternalProject_Add(
 ExternalProject_Add(
     json
     URL ${CMAKE_CURRENT_SOURCE_DIR}/json-${NLOHMANN_VERSION}.tar.gz
-    INSTALL_DIR ${CMAKE_CURRENT_SOURCE_DIR}/json-${NLOHMANN_VERSION}
+    INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/json-${NLOHMANN_VERSION}
     CMAKE_ARGS  -D CMAKE_BUILD_TYPE=Release
                 -D BUILD_TESTING=OFF
                 -D CMAKE_INSTALL_PREFIX=<INSTALL_DIR>

3rd-party/CMakeLists_benchmark.txt.in

@@ -6,8 +6,8 @@ include(ExternalProject)
 ExternalProject_Add(benchmark
     GIT_REPOSITORY    https://github.com/google/benchmark.git
     GIT_TAG           main
-    SOURCE_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/benchmark-src"
-    BINARY_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/benchmark-build"
+    SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/benchmark-src"
+    BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/benchmark-build"
     GIT_SHALLOW       1
     CONFIGURE_COMMAND ""
     BUILD_COMMAND     ""

3rd-party/CMakeLists_googletest.txt.in

@@ -7,8 +7,8 @@ ExternalProject_Add(googletest
     GIT_REPOSITORY    https://github.com/google/googletest.git
     GIT_TAG           main
     GIT_SHALLOW       1
-    SOURCE_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/googletest-src"
-    BINARY_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/googletest-build"
+    SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
+    BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
     CONFIGURE_COMMAND ""
     BUILD_COMMAND     ""
     INSTALL_COMMAND   ""

CMakeLists.txt

@@ -173,10 +173,10 @@ endif()
 
 
 #-------------------
-# 3rd-party
+# Include 3rd-party
 #-------------------
-include_directories(3rd-party/json-${NLOHMANN_VERSION}/include)
-include_directories(3rd-party/plog-${PLOG_VERSION}/include)
+include_directories(${CMAKE_CURRENT_BINARY_DIR}/3rd-party/json-${NLOHMANN_VERSION}/include)
+include_directories(${CMAKE_CURRENT_BINARY_DIR}/3rd-party/plog-${PLOG_VERSION}/include)
 
 
 #-------------------