Select a build target when using CMakePresets.json

[Eddie Chang (kapoisu)]

I used to select the build target from a list of targets after configuring the project when using cmake kits. When I moved from kits to presets, I noticed that a text prompt is shown when the "targets" field is not specified within the build preset. If there are too many available targets, adding them to all presets becomes a tedious task. Is there any ways to get the similar experience as using cmake kits before?

Edit: I've done more tests and finally found that this issue is unrelated to kits/presets. It occurs when the actual CMAKE_BUILD_TYPE doesn't match the build type you select before configuring the project. For example:

1. Using kits, leave the build type as "Unspecified", the actual CMAKE_BUILD_TYPE is Debug by default. -> Mismatch
2. Using kits, leave the build type as "Unspecified", set CMAKE_BUILD_TYPE to "Unspecified" in CMakeLists.txt. -> Match
3. Using kits, select the build type "Debug", set CMAKE_BUILD_TYPE in CMakeLists.txt to "DebuG" in CMakeLists.txt. -> Mismatch (case-sensitive)
4. Using presets without setting CMAKE_BUILD_TYPE, set CMAKE_BUILD_TYPE to "Debug" in CMakeLists.txt. -> Match (so we've found out that the default is "Debug" rather than "Unspecified" as is using kits)
5. Using presets with CMAKE_BUILD_TYPE=Debug, set CMAKE_BUILD_TYPE to "DebuG" in CMakeLists.txt. -> Mismatch (case-insensitive)

Besides, using non-standard build types is allowed. (Only for presets because afaik I cannot set the type to a custom type with kits).