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<HTML><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- Created on September, 12 2004 by texi2html 1.64 --><!-- Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) Karl Berry <karl@freefriends.org> Olaf Bachmann <obachman@mathematik.uni-kl.de> and many others.Maintained by: Olaf Bachmann <obachman@mathematik.uni-kl.de>Send bugs and suggestions to <texi2html@mathematik.uni-kl.de> --><HEAD><TITLE>Autoconf, Automake, and Libtool: libltdl Loader Errors</TITLE><META NAME="description" CONTENT="Autoconf, Automake, and Libtool: libltdl Loader Errors"><META NAME="keywords" CONTENT="Autoconf, Automake, and Libtool: libltdl Loader Errors"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META NAME="Generator" CONTENT="texi2html 1.64"><script language="Javascript"><!-- // Check the browser version. function checkVersion() { if (navigator.appVersion.charAt(0)>=3) return true; if (navigator.appVersion.charAt(0)>=4) return true; else return false; 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The set of standard errors which might beraised by the internal module loaders are available for use in your ownloaders, and should be used where possible for the sake of uniformity ifnothing else. On the odd occasion where that is not possible,libltdl has API calls to register and set your own errormessages, so that users of your module loader will be able to call<CODE>lt_dlerror</CODE> and have the error message you set returned:</P><P><A NAME="IDX47"></A><DL><DT><U>Function:</U> int <B>lt_dlseterror</B> <I>(int <VAR>errorcode</VAR>)</I><DD>By calling this function with one of the error codes enumerated in theheader file, <TT>`ltdl.h'</TT>, <CODE>lt_dlerror</CODE> will return the associateddiagnostic until the error code is changed again.</DL></P><P><A NAME="IDX48"></A><DL><DT><U>Function:</U> int <B>lt_dladderror</B> <I>(const char *<VAR>diagnostic</VAR>)</I><DD>Often you will find that the existing error diagnostics do not describethe failure you have encountered. By using this function you canregister a more suitable diagnostic with libltdl, and subsequentlyuse the returned integer as an argument to <CODE>lt_dlseterror</CODE>.</DL></P><P>libltdl provides several other functions which you may finduseful when writing a custom module loader. These are covered in theLibtool manual, along with more detailed descriptions of the functionsdescribed in the preceding paragraphs.</P><P>In the next chapter, we will discuss the more complex features ofAutomake, before moving on to show you how to use those features and addlibltdl module loading to the Sic project from <A HREF="autobook_93.html#SEC93">12. A Large GNU Autotools Project</A> in the chapter after that.</P><P><A NAME="Advanced GNU Automake Usage"></A></TR></TABLE><BR> <FONT SIZE="-1">This document was generatedby <I>Gary V. Vaughan</I> on <I>September, 12 2004</I>using <A HREF="http://www.mathematik.uni-kl.de/~obachman/Texi2html"><I>texi2html</I></A></BODY></HTML>⌨️ 快捷键说明
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