Cmake error "includes target "X" which requires target "cpr" that is not in any export set"

[Nightyly]

Description

I am creating a library that depends on cpr, so I followed the instructions in the Usage section of the readme, and added that to my CMakeLists.txt

cmake_minimum_required(VERSION 3.14)

include(cmake/prelude.cmake)

project(
    CPPRAW
    VERSION 0.1.0
    DESCRIPTION "Short description"
    HOMEPAGE_URL "https://example.com/"
    LANGUAGES CXX
)

include(cmake/project-is-top-level.cmake)
include(cmake/variables.cmake)

set(JSON_Install ON)

# ---- Declare library ----

add_library(
    CPPRAW_CPPRAW
    source/CPPRAW.cpp
	source/post.cpp
	source/request.cpp
	source/subreddit.cpp
)
add_library(CPPRAW::CPPRAW ALIAS CPPRAW_CPPRAW)

include(GenerateExportHeader)
generate_export_header(
    CPPRAW_CPPRAW
    BASE_NAME CPPRAW
    EXPORT_FILE_NAME export/CPPRAW/CPPRAW_export.hpp
    CUSTOM_CONTENT_FROM_VARIABLE pragma_suppress_c4251
)

if(NOT BUILD_SHARED_LIBS)
  target_compile_definitions(CPPRAW_CPPRAW PUBLIC CPPRAW_STATIC_DEFINE)
endif()

set_target_properties(
    CPPRAW_CPPRAW PROPERTIES
    CXX_VISIBILITY_PRESET hidden
    VISIBILITY_INLINES_HIDDEN YES
    VERSION "${PROJECT_VERSION}"
    SOVERSION "${PROJECT_VERSION_MAJOR}"
    EXPORT_NAME CPPRAW
    OUTPUT_NAME CPPRAW
)

target_include_directories(
    CPPRAW_CPPRAW ${warning_guard}
    PUBLIC
    "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>"
)

target_include_directories(
    CPPRAW_CPPRAW SYSTEM
    PUBLIC
    "$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/export>"
)

include(FetchContent)
FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git
                         GIT_TAG 871ed52d350214a034f6ef8a3b8f51c5ce1bd400) # The commit hash for 1.9.0. Replace with the latest from: https://github.com/libcpr/cpr/releases
FetchContent_MakeAvailable(cpr)
FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.1/json.tar.xz)
FetchContent_MakeAvailable(json)

target_link_libraries(CPPRAW_CPPRAW PRIVATE nlohmann_json::nlohmann_json)
target_link_libraries(CPPRAW_CPPRAW PRIVATE cpr::cpr)

target_compile_features(CPPRAW_CPPRAW PUBLIC cxx_std_17)

# ---- Install rules ----

if(NOT CMAKE_SKIP_INSTALL_RULES)
  include(cmake/install-rules.cmake)
endif()

# ---- Examples ----

if(PROJECT_IS_TOP_LEVEL)
  option(BUILD_EXAMPLES "Build examples tree." "${CPPRAW_DEVELOPER_MODE}")
  if(BUILD_EXAMPLES)
    add_subdirectory(example)
  endif()
endif()

# ---- Developer mode ----

if(NOT CPPRAW_DEVELOPER_MODE)
  return()
elseif(NOT PROJECT_IS_TOP_LEVEL)
  message(
      AUTHOR_WARNING
      "Developer mode is intended for developers of CPPRAW"
  )
endif()

include(cmake/dev-mode.cmake)

Expected Behavior

cpr should link with my project

Actual Behavior

Error when doing cmake ..

-- C++ Requests CMake Options
-- =======================================================
--   CPR_GENERATE_COVERAGE: OFF
--   CPR_CURL_NOSIGNAL: OFF
--   CPR_USE_SYSTEM_GTEST: OFF
--   CPR_FORCE_USE_SYSTEM_CURL: OFF
--   CPR_ENABLE_SSL: ON
--   CPR_FORCE_OPENSSL_BACKEND: OFF
--   CPR_FORCE_WINSSL_BACKEND: OFF
--   CPR_FORCE_DARWINSSL_BACKEND: OFF
--   CPR_FORCE_MBEDTLS_BACKEND: OFF
--   CPR_ENABLE_LINTING: OFF
--   CPR_ENABLE_CPPCHECK: OFF
--   CPR_BUILD_TESTS: OFF
--   CPR_BUILD_TESTS_SSL: OFF
-- =======================================================
-- Automatically detecting SSL backend.
-- Detecting SSL backend...
-- SSL auto detect: Using WinSSL.
-- Configuring build in curl...
-- Using CMake version 3.23.1
-- ZLIB_HEADER_VERSION: 1.2.11
-- ZLIBNG_HEADER_VERSION: 2.0.6
-- Arch detected: 'x86_64'
-- Basearch of 'x86_64' has been detected as: 'x86'
-- Architecture supports unaligned reads
-- Architecture supports unaligned reads of > 4 bytes
-- Architecture-specific source files: arch/x86/x86.c;arch/x86/slide_avx.c;arch/x86/chunkset_avx.c;arch/x86/compare258_avx.c;arch/x86/adler32_avx.c;arch/x86/insert_string_sse.c;arch/x86/compare258_sse.c;arch/x86/chunkset_sse.c;arch/x86/slide_sse.c;arch/x86/adler32_ssse3.c;arch/x86/crc_folding.c
-- The following features have been enabled:

 * CMAKE_BUILD_TYPE, Build type: Debug (selected)
 * WITH_GZFILEOP, Compile with support for gzFile related functions
 * ZLIB_COMPAT, Compile with zlib compatible API
 * WITH_OPTIM, Build with optimisation
 * WITH_NEW_STRATEGIES, Use new strategies
 * WITH_UNALIGNED, Support unaligned reads on platforms that support it
 * WITH_AVX2, Build with AVX2
 * WITH_SSE2, Build with SSE2
 * WITH_SSSE3, Build with SSSE3
 * WITH_SSE4, Build with SSE4
 * WITH_PCLMULQDQ, Build with PCLMULQDQ
 * AVX2_SLIDEHASH, Support AVX2 optimized slide_hash, using "-mavx2"
 * AVX_CHUNKSET, Support AVX optimized chunkset, using "-mavx2"
 * AVX2_COMPARE258, Support AVX2 optimized compare258, using "-mavx2"
 * AVX2_ADLER32, Support AVX2-accelerated adler32, using "-mavx2"
 * SSE42_CRC, Support SSE4.2 optimized CRC hash generation, using "-msse4"
 * SSE42_COMPARE258, Support SSE4.2 optimized compare258, using "-msse4"
 * SSSE3_ADLER32, Support SSSE3-accelerated adler32, using "-mssse3"
 * PCLMUL_CRC, Support CRC hash generation using PCLMULQDQ, using "-mssse3 -msse4 -mpclmul"

-- The following OPTIONAL packages have been found:

 * Git

-- The following features have been disabled:

 * ZLIB_ENABLE_TESTS, Build test binaries
 * ZLIB_DUAL_LINK, Dual link tests against system zlib
 * WITH_FUZZERS, Build test/fuzz
 * WITH_NATIVE_INSTRUCTIONS, Instruct the compiler to use the full instruction set on this host (gcc/clang -march=native)
 * WITH_MAINTAINER_WARNINGS, Build with project maintainer warnings
 * WITH_CODE_COVERAGE, Enable code coverage reporting
 * WITH_INFLATE_STRICT, Build with strict inflate distance checking
 * WITH_INFLATE_ALLOW_INVALID_DIST, Build with zero fill for inflate invalid distances
 * INSTALL_UTILS, Copy minigzip and minideflate during install

-- Enabled curl SSL
-- curl version=[7.80.0]
-- Could NOT find LibSSH2 (missing: LIBSSH2_LIBRARY LIBSSH2_INCLUDE_DIR)
-- Enabled features: SSL IPv6 unixsockets libz AsynchDNS Largefile SSPI alt-svc HSTS SPNEGO Kerberos NTLM
-- Enabled protocols: HTTP HTTPS
-- Enabled SSL backends: Schannel
-- Using the multi-header code from D:/Docs/C++/prueba/CPPRAW/build/_deps/json-src/include/
-- Configuring done
CMake Error: install(EXPORT "CPPRAWTargets" ...) includes target "CPPRAW_CPPRAW" which requires target "cpr" that is not in any export set.
-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.

Possible Fix

I had the same problem with nlohmann/json, but fixed it with adding set(JSON_Install ON) after analyzing the CMakeLists.txt of the nlohmann repo, but cpr does not seem to have an equivalent

Steps to Reproduce

1. Use cmake-init to create a new static/shared library
2. Add

include(FetchContent)
FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git
                         GIT_TAG 871ed52d350214a034f6ef8a3b8f51c5ce1bd400) # The commit hash for 1.9.0. Replace with the latest from: https://github.com/libcpr/cpr/releases
FetchContent_MakeAvailable(cpr)
target_link_libraries(PROJECT_NAME PRIVATE cpr::cpr)

to the CMakeLists.txt of the generated project 3. mkdir build && cd build && cmake .. 4. CMake Error: install(EXPORT "PROJECT_NAMETargets" ...) includes target "PROJECT_NAME_PROJECT_NAME" which requires target "cpr" that is not in any export set.

Your Environment

• Version used: 1.9.0, master
• Where did you get it from (e.g. conan, vcpkg, master, ...): 1.9.0 via FetchContent
• Operating System and version: Windows 10

[KingKili]

Did you use system curl? In order to install cpr, you have to use system curl.

[COM8]

Closing due to no response. Feel free to reopen in case this is still an issue for you.