IntelliSense complains about standard types when using precompiled headers

Brief Issue Summary

IntelliSense starts to complain about all standard things when I’m using target_precompile_headers(), e.g. std::size_t: "namespace "std" has no member "size_t"". The project itself builds just fine. Code structure:

//./project/src/common.h
#include <vector>
//etc.

//./project/src/main.cpp
#include "common.h"
//use std::vector...

CMake structure:

# ./project/CMakeLists.txt:
# some global settings like project(), etc.
add_subdirectory(src)

# ./project/src/CMakeLists.txt
add_executable(project)
target_sources(project
	PRIVATE
	main.cpp
	common.h)
target_precompile_headers(project
	PRIVATE
	"common.h"
)

Without target_precompile_headers() everything is OK.

Platform and Versions

• Operating System: Ubuntu 18.04
• CMake Version: 3.16
• VSCode Version: 1.43.2
• CMake Tools Extension Version: 1.3.1
• Compiler/Toolchain: GCC 9.2.1

[andreeis]

I reproduce now, thanks for the small project.

[bobbrow]

I believe it was fixed in 1.11.25 with this PR where we started forwarding the compiler options to cpptools for parsing instead of doing it ourselves: https://github.com/microsoft/vscode-cmake-tools/pull/2563