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Re: makefile generation with gcc

From: "Dima Sorkin" <dima dot sorkin at gmail dot com>
To: gcc-help at gcc dot gnu dot org
Date: Tue, 18 Jul 2006 16:11:03 +0200
Subject: Re: makefile generation with gcc
References: <e40293600601010339x22ffa7f1qd328594b8d0768e2@mail.gmail.com>

On 1/1/06, Dima Sorkin wrote:

Sorry for replying to myself , but I found the answer

 This change of gcc4 vs gcc3 makes some problems for me:
 gcc3: with -MM -MP: missing header files are ignored.
 gcc4: with -MM -MP:  if some header file not found - it results in error.
          with -MM -MP -MG: all names of missing headers are written as is.

 I want to auto-generate dependencies between my header-files.
Some of my header files include headers from external libraries of huge size
(for example "BOOST C++ lib").


All "external" headers' paths (BOOST etc.) should be supplied
under "-isystem" option, and not "-I", when automatic dependency
generation is done.

Dima.

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