cmake: Generate and install a pkg-config file.

The meson builds install a pkg-config file, but the cmake builds don't. This adds a pkg-config file to the cmake builds that is functionally equivalent to the one generated from meson.

cmake: Generate and install a pkg-config file.
c7d18c16 · Palmer Dabbelt · Érico Rolim · d019ddfc · c7d18c16 · c7d18c16
Commit c7d18c16 authored Aug 08, 2019 by Palmer Dabbelt Committed by Érico Rolim Jul 09, 2020
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Showing with 15 additions and 1 deletion

CMakeLists.txt CMakeLists.txt +11 -1

pkg-config.pc.in cmake/pkg-config.pc.in +4 -0

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.1)
 ## PROJECT
 ## name and version
 ##
-project(nlohmann_json VERSION 3.8.0 LANGUAGES CXX)
+project(nlohmann_json VERSION 3.8.0 DESCRIPTION "JSON for Modern C++" LANGUAGES CXX)

 ##
 ## INCLUDE
@@ -79,6 +79,12 @@ if (MSVC)
    )
 endif()

+# Install a pkg-config file, so other tools can find this.
+CONFIGURE_FILE(
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pkg-config.pc.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
+)
+
 ##
 ## TESTS
 ## create and configure the unit test target
@@ -139,4 +145,8 @@ endif()
        NAMESPACE ${PROJECT_NAME}::
        DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
    )
+    install(
+        FILES "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc"
+        DESTINATION lib/pkgconfig
+    )
 endif()
--- a/cmake/pkg-config.pc.in
+++ b/cmake/pkg-config.pc.in
+Name: ${PROJECT_NAME}
+Description: ${PROJECT_DESCRIPTION}
+Version: ${PROJECT_VERSION}
+Cflags: -I${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}