Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: Ashok <apnmbx-public@yahoo.com>
Newsgroups: comp.lang.tcl
Subject: Re: Can't build TclTLS 2.0b1
Date: Tue, 8 Jul 2025 20:38:02 +0530
Organization: A noiseless patient Spider
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In-Reply-To: <104j517$3is7p$1@dont-email.me>

Alan,

A shot in the dark...from the gcc docs:

If a standard system include directory, or a directory specified with 
`-isystem', is also specified with `-I', the `-I' option will be 
ignored. The directory will still be searched but as a system directory 
at its normal position in the system include chain. This is to ensure 
that GCC's procedure to fix buggy system headers and the ordering for 
the include_next directive are not inadvertently changed. If you really 
need to change the search order for system directories, use the 
`-nostdinc' and/or `-isystem' options.

Key phrase - "-I option will be ignored"

So I'm guessing that /usr/include is already in the default system 
include search path and therefore gets ignored when specified as the -I 
option. Additionally, /usr/local/include appears before /usr/include in 
the default search path. That might explain what you are seeing.

/Ashok