Fix include dir & version

[xiaozhuai]

See also microsoft/vcpkg#52198 (review)

[BillyONeal]

Repeating the content behind the link. @xiaozhuai filed a PR to update the vcpkg port and in that PR, GPT 5.4 found the following. (It did not write anything in this response)

The installed .pc file still claims that this is 11.4.6 despite this claiming to be 12.0.0.

IXWebSocket/CMakeLists.txt

Line 9 in 998cf95

project(ixwebsocket LANGUAGES C CXX VERSION 11.4.6)

The installed CMake and pkgconfig bindings appear to be inconsistent. share\ixwebsocket\ixwebsocket-targets.cmake has:

set_target_properties(ixwebsocket::ixwebsocket PROPERTIES
  INTERFACE_COMPILE_DEFINITIONS "IXWEBSOCKET_USE_TLS;IXWEBSOCKET_USE_MBED_TLS;IXWEBSOCKET_USE_ZLIB"
  INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include/ixwebsocket"

but lib\pkgconfig\ixwebsocket.pc has:

prefix=${pcfiledir}/../..
includedir=${prefix}/include
Cflags: "-I${includedir}"

This means that the CMake bindings want the user to say, for example, #include <IXUuid.h>, but the pkgconfig bindings want the user to say #include <ixwebsocket/IXUuid.h>.

IXWebSocket/test/IXUrlParserTest.cpp

Line 10 in 998cf95

#include <ixwebsocket/IXUrlParser.h>

looks like the intent is for the .pc to be correct. This PR fixes both of those problems (though likely you will want 12.0.1 or something so that you don't mutate an existing "release")

[bsergean]

Thanks @BillyONeal will try to get that fixed today. Changing the cmake include path worries me a bit.