indentlog: + hello example + cmake install attempt

CMakeLists.txt

@@ -4,13 +4,23 @@ project(nestlog VERSION 0.1)
 enable_language(CXX)
 enable_testing()
 
-include(cmake/nestlog.cmake)
-
-add_subdirectory(include)
-add_subdirectory(example)
-
-# this doesn't work in include/CMakeLists.txt
-install(TARGETS indentlog DESTINATION include)
+# always write compile_commands.json
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
 
 set(CMAKE_INSTALL_PREFIX /home/roland/local)
 set(CMAKE_INSTALL_RPATH /home/roland/local/lib)
+
+include(cmake/nestlog.cmake)
+add_subdirectory(example)
+
+# header-only library
+#add_library(indentlog INTERFACE)
+#target_include_directories(indentlog INTERFACE
+#  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+#  $<INSTALL_INTERFACE:include>
+#  )
+#
+#install(TARGETS indentlog
+#  PUBLIC_HEADER DESTINATION include)  # COMPONENT Development
+
+install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/ DESTINATION include)

cmake/nestlog.cmake

@@ -25,7 +25,6 @@ macro(xo_include_options target)
     # (2) clangd (run from emacs lsp-mode) can find them
     #
     if(CMAKE_EXPORT_COMPILE_COMMANDS)
-      set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES
-      ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
+      set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
     endif()
 endmacro()

example/CMakeLists.txt

@@ -7,6 +7,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
 
 #include(cmake/FindSphinx.cmake)
 
+add_subdirectory(hello)
 add_subdirectory(ex1)
 add_subdirectory(ex2)
 add_subdirectory(ex3)

example/hello/CMakeLists.txt

@@ -0,0 +1,2 @@
+add_executable(hello hello.cpp)
+xo_include_options(hello)

example/hello/hello.cpp

@@ -0,0 +1,5 @@
+#include <iostream>
+
+int main(int argc, char ** argv) {
+    std::cout << "Hello, world!" << std::endl;
+}

include/CMakeLists.txt

@@ -1,6 +0,0 @@
-# header-only library
-add_library(indentlog INTERFACE)
-target_include_directories(indentlog INTERFACE
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:include>
-  )