emacs-macport: build on LLVM 14

- Build on `apple_sdk_11_0` to support `aarch64-darwin`
- Add frameworks required for building on newer SDKs
  - `Accelerate`, `UniformTypeIdentifiers`
- Include header to work around `CF_NOESCAPE` issue circa LLVM 7.0

1 files changed, 31 insertions, 0 deletions

diff --git a/pkgs/applications/editors/emacs/macport_noescape_noop.h b/pkgs/applications/editors/emacs/macport_noescape_noop.h
new file mode 100644
index 0000000000000..64c65bd90f880
--- /dev/null
+++ b/pkgs/applications/editors/emacs/macport_noescape_noop.h
@@ -0,0 +1,31 @@
+#ifndef NOESCAPE_NOOP_H_
+#define NOESCAPE_NOOP_H_
+
+// First, do some work to get definitions for *_WIDTH. Normally, Emacs would
+// have these defined by headers in-tree, but clang's headers clash with those.
+// Due to how include paths work, we have to include clang headers if we want to
+// mess with CoreFoundation definitions.
+#pragma push_macro("__STDC_VERSION__")
+// Make the preprocessor think that we're on C2x. The macros we want are gated
+// on it.
+#undef __STDC_VERSION__
+#define __STDC_VERSION__ 202000L
+// Include limits.h first, as stdint.h includes it.
+#include <limits.h>
+
+// XX: clang's stdint.h is shy and won't give us its defs unless it thinks it's
+// in freestanding mode.
+#undef __STDC_HOSTED__
+#include <stdint.h>
+#define __STDC_HOSTED__ 1
+
+#pragma pop_macro("__STDC_VERSION__")
+
+// Now, pull in the header that defines CF_NOESCAPE.
+#include <CoreFoundation/CFBase.h>
+
+// Redefine CF_NOESCAPE as empty.
+#undef CF_NOESCAPE
+#define CF_NOESCAPE
+
+#endif // NOESCAPE_NOOP_H_