* [ignition-plugin1] Add new port
* vcpkg_fixup_cmake_targets: Add DO_NOT_DELETE_PARENT_CONFIG_PATH
By default the vcpkg_fixup_cmake_targets script remove the parent
path of CONFIG_PATH if it named "cmake", this behaviour is not convenient
for ports that install more than one CMake package config file, and
for which vcpkg_fixup_cmake_targets is invoked multiple times.
To optionally disable this behaviour, this commit adds the option
DO_NOT_DELETE_PARENT_CONFIG_PATH to vcpkg_fixup_cmake_targets.
* [ignition-modularscripts] Add support for ignition libraries that install multiple CMake package config files
Some ignition libraries install several CMake package config files,
to represent the different components of the library. This commit modifies
the ignition_modular_library function to fixup correctly all the cmake package config files.
* vcpkg_fixup_pkgconfig: Move definition of SYSTEM_LIBRARIES to vcpkg_common_definitions
To correctly validate installed pkg-config files, vcpkg_fixup_pkgconfig needs to know
for each platform which libraries are not managed by vcpkg. This commits improve this
definitions for all the triplet supported by vcpkg, and move this definition to vcpkg_common_definitions
in a way that permit custom triplets to overload its value.
* Add support for building with MinGW
Tested with MSYS2 MinGW 8.3.0, gcc-mcf.lhmouse MinGW 9.2.1,
and StephanTLavavej/mingw-distro!
* Add MinGW toolchain
From your MinGW configured shell you could just use vcpkg to
configure packages.
An x64-mingw triplet would look like:
```
set(VCPKG_TARGET_ARCHITECTURE x64)
set(VCPKG_CRT_LINKAGE dynamic)
set(VCPKG_LIBRARY_LINKAGE static)
set(VCPKG_ENV_PASSTHROUGH PATH)
set(VCPKG_CMAKE_SYSTEM_NAME MinGW)
```
* Add MinGW community tripplets
x64 tested with https://github.com/StephanTLavavej/mingw-distro
x86, arm64, arm tested with https://github.com/mstorsjo/llvm-mingw
* [vcpkg] add missing implib definitions, fix shared lib extension on mac
(cherry picked from commit 2cddef9541202ecc01ad43036575bc606dc01117)
* Better find_library suffixes and prefixes.
* moved additional suffix into a comment and reverted back to what is expected on windows
* updated documentation for add variables.
* Introduce an easier way to identify target systems...
* fix missing ()
* move the include around.
also added vcpkg_common_functions to be automatically included
* remove warning message
* added remaining VCPKG_CMAKE_SYSTEM_NAMEs found only in vcpkg_configure_cmake to load a toolchain.
* remove warning again from messed up merge
