annotate ext/json11/CMakeLists.txt @ 295:de5dc40f1830

Include headers needed to compile with GCC 15's -std=gnu23 default

```
In file included from ../piper-vamp-cpp/vamp-json/VampJson.h:55,
                 from ../piper-vamp-cpp/vamp-server/convert.cpp:36:
../piper-vamp-cpp/vamp-support/PluginHandleMapper.h:69:13: error: ‘uint32_t’ does not name a type
   69 |     typedef uint32_t Handle;
      |             ^~~~~~~~
../piper-vamp-cpp/vamp-support/PluginHandleMapper.h:39:1: note: ‘uint32_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
   38 | #include "PluginOutputIdMapper.h"
  +++ |+#include <cstdint>
   39 |

../piper-vamp-cpp/ext/json11/json11.cpp: In function ‘void json11::dump(const std::string&, std::string&)’:
../piper-vamp-cpp/ext/json11/json11.cpp:95:32: error: ‘uint8_t’ does not name a type
   95 |         } else if (static_cast<uint8_t>(ch) <= 0x1f) {
      |                                ^~~~~~~
../piper-vamp-cpp/ext/json11/json11.cpp:25:1: note: ‘uint8_t’ is defined in header ‘<cstdint>’; this is probably fixable by adding ‘#include <cstdint>’
   24 | #include <cmath>
  +++ |+#include <cstdint>
   25 | #include <cstdlib>
```

Signed-off-by: Michel Lind <[e-mail]>

cmake_minimum_required(VERSION 2.8)
if (CMAKE_VERSION VERSION_LESS "3")
  project(json11 CXX)
else()
  cmake_policy(SET CMP0048 NEW)
  project(json11 VERSION 1.0.0 LANGUAGES CXX)
endif()

enable_testing()

option(JSON11_BUILD_TESTS "Build unit tests" OFF)
option(JSON11_ENABLE_DR1467_CANARY "Enable canary test for DR 1467" OFF)

if(CMAKE_VERSION VERSION_LESS "3")
  add_definitions(-std=c++11)
else()
  set(CMAKE_CXX_STANDARD 11)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
endif()

if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  set(CMAKE_INSTALL_PREFIX /usr)
endif()

add_library(json11 json11.cpp)
target_include_directories(json11 PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_compile_options(json11
  PRIVATE -fPIC -fno-rtti -fno-exceptions -Wall)

# Set warning flags, which may vary per platform
include(CheckCXXCompilerFlag)
set(_possible_warnings_flags /W4 /WX -Wextra -Werror)
foreach(_warning_flag in ${_possible_warnings_flags})
  CHECK_CXX_COMPILER_FLAG(_warning_flag _flag_supported)
  if(${_flag_supported})
    target_compile_options(json11 PRIVATE ${_warning_flag})
  endif()
endforeach()

configure_file("json11.pc.in" "json11.pc" @ONLY)

if (JSON11_BUILD_TESTS)

  # enable test for DR1467, described here: https://llvm.org/bugs/show_bug.cgi?id=23812
  if(JSON11_ENABLE_DR1467_CANARY)
    add_definitions(-D JSON11_ENABLE_DR1467_CANARY=1)
  else()
    add_definitions(-D JSON11_ENABLE_DR1467_CANARY=0)
  endif()

  add_executable(json11_test test.cpp)
  target_link_libraries(json11_test json11)
endif()

install(TARGETS json11 DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE})
install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/json11.hpp" DESTINATION include/${CMAKE_LIBRARY_ARCHITECTURE})
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/json11.pc" DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE}/pkgconfig)