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| From: | Bob Friesenhahn |
| Subject: | Re: CFLAGS for AC_COMPILE_IFELSE. |
| Date: | Tue, 13 May 2008 13:11:23 -0500 (CDT) |
On Tue, 13 May 2008, Ralf Corsepius wrote:
/usr/include (and /usr/lib) + /usr/local/include (and /usr/local/lib) are special to GCC, they are on the system-default (include, library) search paths, and are treated differently than other directories by GCC
More often than not, the formally installed GCC ignores /usr/local/include. For example, the GCC that comes with OS-X Leopard does not look there. The GCC that comes with FreeBSD 7.0 does not look there. On the other hand, the 'cc' that came with SunOS 4.1.3 does check /usr/local/include by default, so the GCC install for that target did check /usr/local/include by default so that it would match the system compiler. It should not be assumed that if the compiler is GCC that it will pay any attention to /usr/local/include.
Bob ====================================== Bob Friesenhahn address@hidden, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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