From b3a46b9a2a9f86ff416a0ff5f84882c0dedebd14 Mon Sep 17 00:00:00 2001
From: Jan Tojnar <jtojnar@gmail.com>
Date: Sun, 9 Jan 2022 01:57:18 +0100
Subject: [PATCH] build: Make includedir properly overrideable

This is required by some package managers like Nix.

Co-authored-by: Artturin <Artturin@artturin.com>
---
 CMakeLists.txt | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f062ca..b28f13c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,6 +49,10 @@ if(${CMAKE_INSTALL_LIBDIR} STREQUAL "lib64")
     set(FIND_LIBRARY_USE_LIB64_PATHS true)
 endif()
 
+if(NOT DEFINED CMAKE_INSTALL_INCLUDEDIR)
+    set(CMAKE_INSTALL_INCLUDEDIR "include")
+endif()
+
 if(NOT CMAKE_CXX_STANDARD)
     set(CMAKE_CXX_STANDARD 11)
 endif()
@@ -329,7 +333,7 @@ endif()
 target_include_directories(${PROJECT_NAME} PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
     $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
-    $<INSTALL_INTERFACE:include>)
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
 aws_use_package(aws-c-http)
 aws_use_package(aws-c-mqtt)
@@ -346,16 +350,16 @@ aws_add_sanitizers(${PROJECT_NAME})
 
 target_link_libraries(${PROJECT_NAME} PUBLIC ${DEP_AWS_LIBS})
 
-install(FILES ${AWS_CRT_HEADERS} DESTINATION "include/aws/crt" COMPONENT Development)
-install(FILES ${AWS_CRT_AUTH_HEADERS} DESTINATION "include/aws/crt/auth" COMPONENT Development)
-install(FILES ${AWS_CRT_CHECKSUM_HEADERS} DESTINATION "include/aws/crt/checksum" COMPONENT Development)
-install(FILES ${AWS_CRT_CRYPTO_HEADERS} DESTINATION "include/aws/crt/crypto" COMPONENT Development)
-install(FILES ${AWS_CRT_IO_HEADERS} DESTINATION "include/aws/crt/io" COMPONENT Development)
-install(FILES ${AWS_CRT_IOT_HEADERS} DESTINATION "include/aws/iot" COMPONENT Development)
-install(FILES ${AWS_CRT_MQTT_HEADERS} DESTINATION "include/aws/crt/mqtt" COMPONENT Development)
-install(FILES ${AWS_CRT_HTTP_HEADERS} DESTINATION "include/aws/crt/http" COMPONENT Development)
-install(FILES ${AWS_CRT_ENDPOINT_HEADERS} DESTINATION "include/aws/crt/endpoints" COMPONENT Development)
-install(FILES ${AWS_CRT_CBOR_HEADERS} DESTINATION "include/aws/crt/cbor" COMPONENT Development)
+install(FILES ${AWS_CRT_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt" COMPONENT Development)
+install(FILES ${AWS_CRT_AUTH_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/auth" COMPONENT Development)
+install(FILES ${AWS_CRT_CHECKSUM_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/checksum" COMPONENT Development)
+install(FILES ${AWS_CRT_CRYPTO_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/crypto" COMPONENT Development)
+install(FILES ${AWS_CRT_IO_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/io" COMPONENT Development)
+install(FILES ${AWS_CRT_IOT_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/iot" COMPONENT Development)
+install(FILES ${AWS_CRT_MQTT_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/mqtt" COMPONENT Development)
+install(FILES ${AWS_CRT_HTTP_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/http" COMPONENT Development)
+install(FILES ${AWS_CRT_ENDPOINT_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/endpoints" COMPONENT Development)
+install(FILES ${AWS_CRT_CBOR_HEADERS} DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/aws/crt/cbor" COMPONENT Development)
 
 install(
     TARGETS ${PROJECT_NAME}
-- 
2.46.0