Merge pull request #42 from seleznevae/issue-40

[A] Add target export in cmake.

.travis.yml

@@ -255,6 +255,20 @@ script:
   #     scan-build make ;
   #   fi
 
+  # Test package installation
+  - cd ..
+  - rm -r build/*
+  - cmake -H. -Bbuild -DCMAKE_C_STANDARD=99 -DCMAKE_CXX_STANDARD=11 -DCMAKE_INSTALL_PREFIX=`pwd`/install
+  - cmake --build build --target all
+  - cmake --build build -- install
+  - ls `pwd`/install
+  - cd tests/package_tests
+  - cmake -H. -B_build -DCMAKE_PREFIX_PATH=../../install -DCMAKE_C_STANDARD=99 -DCMAKE_CXX_STANDARD=11
+  - cmake --build _build -- -j3
+  - ./_build/app
+  - rm -rf _build
+  - cd ../../build
+
   # Build for coveralls (should be the last)
   - |
     if [ "${CC}" = 'gcc' ]; then

CMakeLists.txt

@@ -260,3 +260,12 @@ list(APPEND ${PROJECT_NAME}_ctests
 foreach(exe ${${PROJECT_NAME}_ctests})
     add_test(NAME ${exe} COMMAND ${exe})
 endforeach()
+
+# ------------------------------------------------------------------------------
+# Exported targets for outer applications.
+# ------------------------------------------------------------------------------
+export(
+    TARGETS fort
+    FILE ${PROJECT_NAME}-targets.cmake
+)
+

ChangeLog.md

@@ -15,6 +15,7 @@
 ### Internal
 
 - Refactoring of code that uses vectors.
+- Add target export in cmake.
 
 ### Docs
 

cmake/libfort-config.cmake.in

@@ -0,0 +1,5 @@
+if(NOT TARGET @PROJECT_NAME@::fort)
+    include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake")
+endif()
+
+set(@PROJECT_NAME@_LIBRARIES @PROJECT_NAME@::fort)

lib/CMakeLists.txt

@@ -6,7 +6,8 @@ add_library(fort
 
 target_include_directories(fort
     PUBLIC
-        ${CMAKE_CURRENT_SOURCE_DIR}
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 
 set_target_properties(fort
@@ -30,14 +31,45 @@ endif()
 
 include(GNUInstallDirs)
 install(
-    TARGETS
-      fort
+    TARGETS fort
+    EXPORT ${PROJECT_NAME}-targets
+    INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
-
-install(FILES fort.h fort.hpp DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(
+    FILES fort.h fort.hpp
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)
 
 configure_file(libfort.pc.in libfort.pc @ONLY)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libfort.pc DESTINATION lib/pkgconfig)
+install(
+    FILES ${CMAKE_CURRENT_BINARY_DIR}/libfort.pc
+    DESTINATION lib/pkgconfig
+)
+
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/../cmake/${PROJECT_NAME}-config.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
+    INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+)
+write_basic_package_version_file(
+    ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
+    COMPATIBILITY SameMajorVersion
+)
+install(
+    FILES
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+)
+
+install(
+    EXPORT ${PROJECT_NAME}-targets
+    FILE ${PROJECT_NAME}-targets.cmake
+    NAMESPACE ${PROJECT_NAME}::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+)
+

tests/package_tests/1-simple_table.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+
+#include "fort.hpp"
+
+
+int main()
+{
+    fort::char_table table;
+    table << fort::header
+        << "N" << "Driver" << "Time" << "Avg Speed" << fort::endr
+        << "1" << "Ricciardo" << "1:25.945" << "47.362" << fort::endr
+        << "2" << "Hamilton" << "1:26.373" << "35.02" << fort::endr
+        << "3" << "Verstappen" << "1:26.469" << "29.78" << fort::endr;
+
+    std::cout << table.to_string() << std::endl;
+}

tests/package_tests/CMakeLists.txt

@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.0)
+
+find_package(libfort)
+
+# Assert exports of libfort
+if (NOT libfort_FOUND)
+	message(FATAL_ERROR "libfort was not found")
+endif()
+if (NOT TARGET libfort::fort)
+	message(FATAL_ERROR "TARGET libfort::fort not found")
+endif()
+if (NOT DEFINED libfort_LIBRARIES)
+	message(FATAL_ERROR "libfort_LIBRARIES are not defined")
+endif()
+if (NOT ${libfort_VERSION} EQUAL "0.4.0")
+	message(FATAL_ERROR "libfort_VERSION is incorrect")
+endif()
+
+add_executable(app 
+    1-simple_table.cpp)
+
+target_link_libraries(app
+    libfort::fort)