Zig is silently caching an old cimport.h with angle brackets, despite deleting .zig-cache.

[alsanie360]

Zig Version

0.14.0

Steps to Reproduce and Observed Behavior

Environment:
• Zig version: 0.14.0
• Platform: macOS 15 (Apple Silicon M3)

Steps to Reproduce:
1. Create a header file in your project:
mylib/mylib.h
2. Add the header path in build.zig:
exe.addIncludePath(b.path("mylib"));
3. In your .zig file, use:
const c = @cImport({
@Cinclude("mylib.h");
});
4. Initially (by mistake), use:
@Cinclude(<mylib.h>);
5. Fix it by changing to quotes and deleting .zig-cache:
@Cinclude("mylib.h");

            rm -rf .zig-cache
            zig build

Observed Behavior:
• Zig continues to generate cimport.h with:
#include <mylib.h>

•	Even after correcting to @cInclude("mylib.h") and clearing .zig-cache
•	The build fails with:
            error: 'mylib.h' file not found

Expected Behavior

•	After correcting to @cInclude("mylib.h") and clearing .zig-cache, Zig should regenerate cimport.h using quotes, not angle brackets.
•	The build should succeed if the header is available in addIncludePath.

[mlugg]

Working as intended, @cInclude always emits code using '#include <angle_brackets> rather than #cinclude "quoted". Your original code of @cInclude(<mylib.h>) is not valid Zig syntax, and will have emitted a compile error and not generated any C code at all.

Note that @cImport and friends are set to be deleted: #20630