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Re: Adding $includedir and $libdir in CPPFLAGS and LDFLAGS

From: Alexandre Duret-Lutz
Subject: Re: Adding $includedir and $libdir in CPPFLAGS and LDFLAGS
Date: 28 Dec 2001 10:25:46 +0100
User-agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/21.1

>>> "John" == John D Burger <address@hidden> writes:


 John> I've tried:

 John> AC_INIT(libspec, 1.0, address@hidden)
 John> CPPFLAGS="-I$includedir $CPPFLAGS"
 John> LDFLAGS="-L$libdir $LDFLAGS"
 John> ...

Aside: you may want to protect your code against the following
issue described in the GCC manual:

|   * Use of `-I/usr/include' may cause trouble.
|     Many systems come with header files that won't work with GCC unless
|     corrected by `fixincludes'.  The corrected header files go in a new
|     directory; GCC searches this directory before `/usr/include'.  If
|     you use `-I/usr/include', this tells GCC to search `/usr/include'
|     earlier on, before the corrected headers.  The result is that you
|     get the uncorrected header files.

 John> but this doesn't quite work - ac_cpp and friends end up with an
 John> unexpanded ${prefix} or ${exec_prefix}, I believe.  

Appart from the `NONE' stuff, is that a problem?  
IIRC autoconf will `eval' any call to ac_cpp and friends.


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Alexandre Duret-Lutz

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