Tcl/Tk applications in C on macOS

When ActiveTcl installs on macOS (Catalina), it links commands (e.g. tclsh) in /usr/local/bin but leaves the headers and libraries in the frameworks (/Library/Frameworks/Tcl.framework, likewise Tk).

How to call the compiler (gcc for preference, clang also would help) to find the headers?

Should the headers and libraries be copied to /usr/local like the commands?

Iā€™m sorry that no one has felt able to respond. One might have hoped that ActiveState themselves would have had something to say.

Anyway, the answer is that the C headers have to be explicitly called up from the frameworks ā€¦

-I/Library/Frameworks/Tcl.framework/Headers -I/Library/Frameworks/Tk.framework/Headers

while the libraries are accessed in the frameworks as normal (note that the effect of -F applies here in spite of apparent disclaimer in Apple documentation):

-F/Library/Frameworks -framework Tcl -framework Tk

both with GCC (FSF 10) and Apple clang.

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