MacOS "stdlib.h" not found

[MitchellWeg]

I'm trying to compile my Julia library with CBinding. However, I cannot get it to compile:

Example:

c`-Wall

c"""
#include <stdlib.h>
"""

It errors with: "fatal error: 'stdlib.h' no such file or directory".

When I compile with verbose output, I notice it's looking for directories belonging to clang 14.0.6, but I only have clang 14.0.4 installed as my default MacOS clang. I installed clang 16 with brew, can I somehow link that?

Thanks in advance.

M1 Mac.
MacOS Ventura 13.4.1

[Ezgiiiiiiiii]

I'm trying to compile my Julia library with CBinding. However, I cannot get it to compile:

Example:

c`-Wall

c"""
#include <stdlib.h>
"""

It errors with: "fatal error: 'stdlib.h' no such file or directory".

When I compile with verbose output, I notice it's looking for directories belonging to clang 14.0.6, but I only have clang 14.0.4 installed as my default MacOS clang. I installed clang 16 with brew, can I somehow link that?

Thanks in advance.

M1 Mac. MacOS Ventura 13.4.1

[krrutkow]

I am not familiar with how MacOS handles compiler and system resources, but my best guess is that it should be possible to use the -isystem compiler flag when creating your compiler context to provide another location for the compiler infrastructure to find system resources, something like c`-isystem $(systemResourcesIncludeDir) -Wall` in your case. An example of where CBinding is already using the flag is here:

CBinding.jl/src/context.jl

Lines 258 to 260 in 38e76e5

	pushfirst!(ctx.args,
	"-isystem", includedir, # these -isystem args are needed since Clang_jll packaging seems to have clang's InstallDir not set/found correctly
	"-isystem", joinpath(dirname(dirname(libclang_path())), "include"),

Also related to #117