2014-07-05 02:28:24 +04:00
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<title>pcrebuild specification</title>
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<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
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<h1>pcrebuild man page</h1>
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<p>
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Return to the <a href="index.html">PCRE index page</a>.
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</p>
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<p>
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This page is part of the PCRE HTML documentation. It was generated automatically
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from the original man page. If there is any nonsense in it, please consult the
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man page, in case the conversion went wrong.
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<br>
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<ul>
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2014-07-05 15:53:30 +04:00
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<li><a name="TOC1" href="#SEC1">BUILDING PCRE</a>
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<li><a name="TOC2" href="#SEC2">PCRE BUILD-TIME OPTIONS</a>
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<li><a name="TOC3" href="#SEC3">BUILDING 8-BIT, 16-BIT AND 32-BIT LIBRARIES</a>
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<li><a name="TOC4" href="#SEC4">BUILDING SHARED AND STATIC LIBRARIES</a>
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<li><a name="TOC5" href="#SEC5">C++ SUPPORT</a>
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<li><a name="TOC6" href="#SEC6">UTF-8, UTF-16 AND UTF-32 SUPPORT</a>
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<li><a name="TOC7" href="#SEC7">UNICODE CHARACTER PROPERTY SUPPORT</a>
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<li><a name="TOC8" href="#SEC8">JUST-IN-TIME COMPILER SUPPORT</a>
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<li><a name="TOC9" href="#SEC9">CODE VALUE OF NEWLINE</a>
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<li><a name="TOC10" href="#SEC10">WHAT \R MATCHES</a>
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<li><a name="TOC11" href="#SEC11">POSIX MALLOC USAGE</a>
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<li><a name="TOC12" href="#SEC12">HANDLING VERY LARGE PATTERNS</a>
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<li><a name="TOC13" href="#SEC13">AVOIDING EXCESSIVE STACK USAGE</a>
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<li><a name="TOC14" href="#SEC14">LIMITING PCRE RESOURCE USAGE</a>
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<li><a name="TOC15" href="#SEC15">CREATING CHARACTER TABLES AT BUILD TIME</a>
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<li><a name="TOC16" href="#SEC16">USING EBCDIC CODE</a>
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<li><a name="TOC17" href="#SEC17">PCREGREP OPTIONS FOR COMPRESSED FILE SUPPORT</a>
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<li><a name="TOC18" href="#SEC18">PCREGREP BUFFER SIZE</a>
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<li><a name="TOC19" href="#SEC19">PCRETEST OPTION FOR LIBREADLINE SUPPORT</a>
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<li><a name="TOC20" href="#SEC20">DEBUGGING WITH VALGRIND SUPPORT</a>
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<li><a name="TOC21" href="#SEC21">CODE COVERAGE REPORTING</a>
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<li><a name="TOC22" href="#SEC22">SEE ALSO</a>
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<li><a name="TOC23" href="#SEC23">AUTHOR</a>
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<li><a name="TOC24" href="#SEC24">REVISION</a>
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</ul>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC1" href="#TOC1">BUILDING PCRE</a><br>
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<P>
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PCRE is distributed with a <b>configure</b> script that can be used to build the
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library in Unix-like environments using the applications known as Autotools.
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Also in the distribution are files to support building using <b>CMake</b>
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instead of <b>configure</b>. The text file
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<a href="README.txt"><b>README</b></a>
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contains general information about building with Autotools (some of which is
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repeated below), and also has some comments about building on various operating
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systems. There is a lot more information about building PCRE without using
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Autotools (including information about using <b>CMake</b> and building "by
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hand") in the text file called
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<a href="NON-AUTOTOOLS-BUILD.txt"><b>NON-AUTOTOOLS-BUILD</b>.</a>
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You should consult this file as well as the
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<a href="README.txt"><b>README</b></a>
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file if you are building in a non-Unix-like environment.
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</P>
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<br><a name="SEC2" href="#TOC1">PCRE BUILD-TIME OPTIONS</a><br>
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<P>
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The rest of this document describes the optional features of PCRE that can be
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selected when the library is compiled. It assumes use of the <b>configure</b>
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script, where the optional features are selected or deselected by providing
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options to <b>configure</b> before running the <b>make</b> command. However, the
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same options can be selected in both Unix-like and non-Unix-like environments
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using the GUI facility of <b>cmake-gui</b> if you are using <b>CMake</b> instead
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of <b>configure</b> to build PCRE.
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</P>
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<P>
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If you are not using Autotools or <b>CMake</b>, option selection can be done by
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editing the <b>config.h</b> file, or by passing parameter settings to the
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compiler, as described in
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<a href="NON-AUTOTOOLS-BUILD.txt"><b>NON-AUTOTOOLS-BUILD</b>.</a>
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</P>
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<P>
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The complete list of options for <b>configure</b> (which includes the standard
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ones such as the selection of the installation directory) can be obtained by
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running
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<pre>
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./configure --help
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</pre>
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The following sections include descriptions of options whose names begin with
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--enable or --disable. These settings specify changes to the defaults for the
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<b>configure</b> command. Because of the way that <b>configure</b> works,
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--enable and --disable always come in pairs, so the complementary option always
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exists as well, but as it specifies the default, it is not described.
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</P>
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<br><a name="SEC3" href="#TOC1">BUILDING 8-BIT, 16-BIT AND 32-BIT LIBRARIES</a><br>
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<P>
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By default, a library called <b>libpcre</b> is built, containing functions that
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take string arguments contained in vectors of bytes, either as single-byte
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characters, or interpreted as UTF-8 strings. You can also build a separate
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library, called <b>libpcre16</b>, in which strings are contained in vectors of
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16-bit data units and interpreted either as single-unit characters or UTF-16
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strings, by adding
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<pre>
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--enable-pcre16
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</pre>
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to the <b>configure</b> command. You can also build yet another separate
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library, called <b>libpcre32</b>, in which strings are contained in vectors of
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32-bit data units and interpreted either as single-unit characters or UTF-32
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strings, by adding
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<pre>
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--enable-pcre32
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</pre>
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to the <b>configure</b> command. If you do not want the 8-bit library, add
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<pre>
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--disable-pcre8
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</pre>
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as well. At least one of the three libraries must be built. Note that the C++
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and POSIX wrappers are for the 8-bit library only, and that <b>pcregrep</b> is
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an 8-bit program. None of these are built if you select only the 16-bit or
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32-bit libraries.
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</P>
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<br><a name="SEC4" href="#TOC1">BUILDING SHARED AND STATIC LIBRARIES</a><br>
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<P>
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The Autotools PCRE building process uses <b>libtool</b> to build both shared and
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static libraries by default. You can suppress one of these by adding one of
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<pre>
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--disable-shared
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--disable-static
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</pre>
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to the <b>configure</b> command, as required.
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</P>
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<br><a name="SEC5" href="#TOC1">C++ SUPPORT</a><br>
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<P>
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By default, if the 8-bit library is being built, the <b>configure</b> script
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will search for a C++ compiler and C++ header files. If it finds them, it
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automatically builds the C++ wrapper library (which supports only 8-bit
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strings). You can disable this by adding
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<pre>
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--disable-cpp
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</pre>
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to the <b>configure</b> command.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC6" href="#TOC1">UTF-8, UTF-16 AND UTF-32 SUPPORT</a><br>
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<P>
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To build PCRE with support for UTF Unicode character strings, add
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<pre>
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--enable-utf
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</pre>
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to the <b>configure</b> command. This setting applies to all three libraries,
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adding support for UTF-8 to the 8-bit library, support for UTF-16 to the 16-bit
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library, and support for UTF-32 to the to the 32-bit library. There are no
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separate options for enabling UTF-8, UTF-16 and UTF-32 independently because
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that would allow ridiculous settings such as requesting UTF-16 support while
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building only the 8-bit library. It is not possible to build one library with
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UTF support and another without in the same configuration. (For backwards
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compatibility, --enable-utf8 is a synonym of --enable-utf.)
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</P>
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<P>
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Of itself, this setting does not make PCRE treat strings as UTF-8, UTF-16 or
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UTF-32. As well as compiling PCRE with this option, you also have have to set
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the PCRE_UTF8, PCRE_UTF16 or PCRE_UTF32 option (as appropriate) when you call
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one of the pattern compiling functions.
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</P>
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<P>
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If you set --enable-utf when compiling in an EBCDIC environment, PCRE expects
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its input to be either ASCII or UTF-8 (depending on the run-time option). It is
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not possible to support both EBCDIC and UTF-8 codes in the same version of the
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library. Consequently, --enable-utf and --enable-ebcdic are mutually
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exclusive.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC7" href="#TOC1">UNICODE CHARACTER PROPERTY SUPPORT</a><br>
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<P>
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UTF support allows the libraries to process character codepoints up to 0x10ffff
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in the strings that they handle. On its own, however, it does not provide any
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facilities for accessing the properties of such characters. If you want to be
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able to use the pattern escapes \P, \p, and \X, which refer to Unicode
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character properties, you must add
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<pre>
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--enable-unicode-properties
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</pre>
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to the <b>configure</b> command. This implies UTF support, even if you have
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not explicitly requested it.
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</P>
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<P>
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Including Unicode property support adds around 30K of tables to the PCRE
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library. Only the general category properties such as <i>Lu</i> and <i>Nd</i> are
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supported. Details are given in the
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<a href="pcrepattern.html"><b>pcrepattern</b></a>
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documentation.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC8" href="#TOC1">JUST-IN-TIME COMPILER SUPPORT</a><br>
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<P>
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Just-in-time compiler support is included in the build by specifying
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<pre>
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--enable-jit
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</pre>
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This support is available only for certain hardware architectures. If this
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option is set for an unsupported architecture, a compile time error occurs.
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See the
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<a href="pcrejit.html"><b>pcrejit</b></a>
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documentation for a discussion of JIT usage. When JIT support is enabled,
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pcregrep automatically makes use of it, unless you add
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<pre>
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--disable-pcregrep-jit
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</pre>
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to the "configure" command.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC9" href="#TOC1">CODE VALUE OF NEWLINE</a><br>
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2014-07-05 02:28:24 +04:00
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<P>
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By default, PCRE interprets the linefeed (LF) character as indicating the end
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of a line. This is the normal newline character on Unix-like systems. You can
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compile PCRE to use carriage return (CR) instead, by adding
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<pre>
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--enable-newline-is-cr
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</pre>
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to the <b>configure</b> command. There is also a --enable-newline-is-lf option,
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which explicitly specifies linefeed as the newline character.
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<br>
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<br>
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Alternatively, you can specify that line endings are to be indicated by the two
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character sequence CRLF. If you want this, add
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<pre>
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--enable-newline-is-crlf
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</pre>
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to the <b>configure</b> command. There is a fourth option, specified by
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<pre>
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--enable-newline-is-anycrlf
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</pre>
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which causes PCRE to recognize any of the three sequences CR, LF, or CRLF as
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indicating a line ending. Finally, a fifth option, specified by
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<pre>
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--enable-newline-is-any
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</pre>
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causes PCRE to recognize any Unicode newline sequence.
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</P>
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<P>
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Whatever line ending convention is selected when PCRE is built can be
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overridden when the library functions are called. At build time it is
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conventional to use the standard for your operating system.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC10" href="#TOC1">WHAT \R MATCHES</a><br>
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2014-07-05 02:28:24 +04:00
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<P>
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By default, the sequence \R in a pattern matches any Unicode newline sequence,
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whatever has been selected as the line ending sequence. If you specify
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<pre>
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--enable-bsr-anycrlf
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</pre>
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the default is changed so that \R matches only CR, LF, or CRLF. Whatever is
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selected when PCRE is built can be overridden when the library functions are
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called.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC11" href="#TOC1">POSIX MALLOC USAGE</a><br>
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2014-07-05 02:28:24 +04:00
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<P>
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When the 8-bit library is called through the POSIX interface (see the
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<a href="pcreposix.html"><b>pcreposix</b></a>
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documentation), additional working storage is required for holding the pointers
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to capturing substrings, because PCRE requires three integers per substring,
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whereas the POSIX interface provides only two. If the number of expected
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substrings is small, the wrapper function uses space on the stack, because this
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is faster than using <b>malloc()</b> for each call. The default threshold above
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which the stack is no longer used is 10; it can be changed by adding a setting
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such as
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<pre>
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--with-posix-malloc-threshold=20
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</pre>
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to the <b>configure</b> command.
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</P>
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2014-07-05 15:53:30 +04:00
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<br><a name="SEC12" href="#TOC1">HANDLING VERY LARGE PATTERNS</a><br>
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2014-07-05 02:28:24 +04:00
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<P>
|
|
|
|
|
Within a compiled pattern, offset values are used to point from one part to
|
|
|
|
|
another (for example, from an opening parenthesis to an alternation
|
|
|
|
|
metacharacter). By default, in the 8-bit and 16-bit libraries, two-byte values
|
|
|
|
|
are used for these offsets, leading to a maximum size for a compiled pattern of
|
|
|
|
|
around 64K. This is sufficient to handle all but the most gigantic patterns.
|
|
|
|
|
Nevertheless, some people do want to process truly enormous patterns, so it is
|
|
|
|
|
possible to compile PCRE to use three-byte or four-byte offsets by adding a
|
|
|
|
|
setting such as
|
|
|
|
|
<pre>
|
|
|
|
|
--with-link-size=3
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. The value given must be 2, 3, or 4. For the
|
|
|
|
|
16-bit library, a value of 3 is rounded up to 4. In these libraries, using
|
|
|
|
|
longer offsets slows down the operation of PCRE because it has to load
|
|
|
|
|
additional data when handling them. For the 32-bit library the value is always
|
|
|
|
|
4 and cannot be overridden; the value of --with-link-size is ignored.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC13" href="#TOC1">AVOIDING EXCESSIVE STACK USAGE</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
When matching with the <b>pcre_exec()</b> function, PCRE implements backtracking
|
|
|
|
|
by making recursive calls to an internal function called <b>match()</b>. In
|
|
|
|
|
environments where the size of the stack is limited, this can severely limit
|
|
|
|
|
PCRE's operation. (The Unix environment does not usually suffer from this
|
|
|
|
|
problem, but it may sometimes be necessary to increase the maximum stack size.
|
|
|
|
|
There is a discussion in the
|
|
|
|
|
<a href="pcrestack.html"><b>pcrestack</b></a>
|
|
|
|
|
documentation.) An alternative approach to recursion that uses memory from the
|
|
|
|
|
heap to remember data, instead of using recursive function calls, has been
|
|
|
|
|
implemented to work round the problem of limited stack size. If you want to
|
|
|
|
|
build a version of PCRE that works this way, add
|
|
|
|
|
<pre>
|
|
|
|
|
--disable-stack-for-recursion
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. With this configuration, PCRE will use the
|
|
|
|
|
<b>pcre_stack_malloc</b> and <b>pcre_stack_free</b> variables to call memory
|
|
|
|
|
management functions. By default these point to <b>malloc()</b> and
|
|
|
|
|
<b>free()</b>, but you can replace the pointers so that your own functions are
|
|
|
|
|
used instead.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
Separate functions are provided rather than using <b>pcre_malloc</b> and
|
|
|
|
|
<b>pcre_free</b> because the usage is very predictable: the block sizes
|
|
|
|
|
requested are always the same, and the blocks are always freed in reverse
|
|
|
|
|
order. A calling program might be able to implement optimized functions that
|
|
|
|
|
perform better than <b>malloc()</b> and <b>free()</b>. PCRE runs noticeably more
|
|
|
|
|
slowly when built in this way. This option affects only the <b>pcre_exec()</b>
|
|
|
|
|
function; it is not relevant for <b>pcre_dfa_exec()</b>.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC14" href="#TOC1">LIMITING PCRE RESOURCE USAGE</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
Internally, PCRE has a function called <b>match()</b>, which it calls repeatedly
|
|
|
|
|
(sometimes recursively) when matching a pattern with the <b>pcre_exec()</b>
|
|
|
|
|
function. By controlling the maximum number of times this function may be
|
|
|
|
|
called during a single matching operation, a limit can be placed on the
|
|
|
|
|
resources used by a single call to <b>pcre_exec()</b>. The limit can be changed
|
|
|
|
|
at run time, as described in the
|
|
|
|
|
<a href="pcreapi.html"><b>pcreapi</b></a>
|
|
|
|
|
documentation. The default is 10 million, but this can be changed by adding a
|
|
|
|
|
setting such as
|
|
|
|
|
<pre>
|
|
|
|
|
--with-match-limit=500000
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. This setting has no effect on the
|
|
|
|
|
<b>pcre_dfa_exec()</b> matching function.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
In some environments it is desirable to limit the depth of recursive calls of
|
|
|
|
|
<b>match()</b> more strictly than the total number of calls, in order to
|
|
|
|
|
restrict the maximum amount of stack (or heap, if --disable-stack-for-recursion
|
|
|
|
|
is specified) that is used. A second limit controls this; it defaults to the
|
|
|
|
|
value that is set for --with-match-limit, which imposes no additional
|
|
|
|
|
constraints. However, you can set a lower limit by adding, for example,
|
|
|
|
|
<pre>
|
|
|
|
|
--with-match-limit-recursion=10000
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. This value can also be overridden at run time.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC15" href="#TOC1">CREATING CHARACTER TABLES AT BUILD TIME</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
PCRE uses fixed tables for processing characters whose code values are less
|
|
|
|
|
than 256. By default, PCRE is built with a set of tables that are distributed
|
|
|
|
|
in the file <i>pcre_chartables.c.dist</i>. These tables are for ASCII codes
|
|
|
|
|
only. If you add
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-rebuild-chartables
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command, the distributed tables are no longer used.
|
|
|
|
|
Instead, a program called <b>dftables</b> is compiled and run. This outputs the
|
|
|
|
|
source for new set of tables, created in the default locale of your C run-time
|
|
|
|
|
system. (This method of replacing the tables does not work if you are cross
|
|
|
|
|
compiling, because <b>dftables</b> is run on the local host. If you need to
|
|
|
|
|
create alternative tables when cross compiling, you will have to do so "by
|
|
|
|
|
hand".)
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC16" href="#TOC1">USING EBCDIC CODE</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
PCRE assumes by default that it will run in an environment where the character
|
|
|
|
|
code is ASCII (or Unicode, which is a superset of ASCII). This is the case for
|
|
|
|
|
most computer operating systems. PCRE can, however, be compiled to run in an
|
|
|
|
|
EBCDIC environment by adding
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-ebcdic
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. This setting implies
|
|
|
|
|
--enable-rebuild-chartables. You should only use it if you know that you are in
|
|
|
|
|
an EBCDIC environment (for example, an IBM mainframe operating system). The
|
|
|
|
|
--enable-ebcdic option is incompatible with --enable-utf.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
The EBCDIC character that corresponds to an ASCII LF is assumed to have the
|
|
|
|
|
value 0x15 by default. However, in some EBCDIC environments, 0x25 is used. In
|
|
|
|
|
such an environment you should use
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-ebcdic-nl25
|
|
|
|
|
</pre>
|
|
|
|
|
as well as, or instead of, --enable-ebcdic. The EBCDIC character for CR has the
|
|
|
|
|
same value as in ASCII, namely, 0x0d. Whichever of 0x15 and 0x25 is <i>not</i>
|
|
|
|
|
chosen as LF is made to correspond to the Unicode NEL character (which, in
|
|
|
|
|
Unicode, is 0x85).
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
The options that select newline behaviour, such as --enable-newline-is-cr,
|
|
|
|
|
and equivalent run-time options, refer to these character values in an EBCDIC
|
|
|
|
|
environment.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC17" href="#TOC1">PCREGREP OPTIONS FOR COMPRESSED FILE SUPPORT</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
By default, <b>pcregrep</b> reads all files as plain text. You can build it so
|
|
|
|
|
that it recognizes files whose names end in <b>.gz</b> or <b>.bz2</b>, and reads
|
|
|
|
|
them with <b>libz</b> or <b>libbz2</b>, respectively, by adding one or both of
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-pcregrep-libz
|
|
|
|
|
--enable-pcregrep-libbz2
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. These options naturally require that the
|
|
|
|
|
relevant libraries are installed on your system. Configuration will fail if
|
|
|
|
|
they are not.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC18" href="#TOC1">PCREGREP BUFFER SIZE</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
<b>pcregrep</b> uses an internal buffer to hold a "window" on the file it is
|
|
|
|
|
scanning, in order to be able to output "before" and "after" lines when it
|
|
|
|
|
finds a match. The size of the buffer is controlled by a parameter whose
|
|
|
|
|
default value is 20K. The buffer itself is three times this size, but because
|
|
|
|
|
of the way it is used for holding "before" lines, the longest line that is
|
|
|
|
|
guaranteed to be processable is the parameter size. You can change the default
|
|
|
|
|
parameter value by adding, for example,
|
|
|
|
|
<pre>
|
|
|
|
|
--with-pcregrep-bufsize=50K
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command. The caller of \fPpcregrep\fP can, however,
|
|
|
|
|
override this value by specifying a run-time option.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC19" href="#TOC1">PCRETEST OPTION FOR LIBREADLINE SUPPORT</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
If you add
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-pcretest-libreadline
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command, <b>pcretest</b> is linked with the
|
|
|
|
|
<b>libreadline</b> library, and when its input is from a terminal, it reads it
|
|
|
|
|
using the <b>readline()</b> function. This provides line-editing and history
|
|
|
|
|
facilities. Note that <b>libreadline</b> is GPL-licensed, so if you distribute a
|
|
|
|
|
binary of <b>pcretest</b> linked in this way, there may be licensing issues.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
Setting this option causes the <b>-lreadline</b> option to be added to the
|
|
|
|
|
<b>pcretest</b> build. In many operating environments with a sytem-installed
|
|
|
|
|
<b>libreadline</b> this is sufficient. However, in some environments (e.g.
|
|
|
|
|
if an unmodified distribution version of readline is in use), some extra
|
|
|
|
|
configuration may be necessary. The INSTALL file for <b>libreadline</b> says
|
|
|
|
|
this:
|
|
|
|
|
<pre>
|
|
|
|
|
"Readline uses the termcap functions, but does not link with the
|
|
|
|
|
termcap or curses library itself, allowing applications which link
|
|
|
|
|
with readline the to choose an appropriate library."
|
|
|
|
|
</pre>
|
|
|
|
|
If your environment has not been set up so that an appropriate library is
|
|
|
|
|
automatically included, you may need to add something like
|
|
|
|
|
<pre>
|
|
|
|
|
LIBS="-ncurses"
|
|
|
|
|
</pre>
|
|
|
|
|
immediately before the <b>configure</b> command.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC20" href="#TOC1">DEBUGGING WITH VALGRIND SUPPORT</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
By adding the
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-valgrind
|
|
|
|
|
</pre>
|
|
|
|
|
option to to the <b>configure</b> command, PCRE will use valgrind annotations
|
|
|
|
|
to mark certain memory regions as unaddressable. This allows it to detect
|
|
|
|
|
invalid memory accesses, and is mostly useful for debugging PCRE itself.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC21" href="#TOC1">CODE COVERAGE REPORTING</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
If your C compiler is gcc, you can build a version of PCRE that can generate a
|
|
|
|
|
code coverage report for its test suite. To enable this, you must install
|
|
|
|
|
<b>lcov</b> version 1.6 or above. Then specify
|
|
|
|
|
<pre>
|
|
|
|
|
--enable-coverage
|
|
|
|
|
</pre>
|
|
|
|
|
to the <b>configure</b> command and build PCRE in the usual way.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
Note that using <b>ccache</b> (a caching C compiler) is incompatible with code
|
|
|
|
|
coverage reporting. If you have configured <b>ccache</b> to run automatically
|
|
|
|
|
on your system, you must set the environment variable
|
|
|
|
|
<pre>
|
|
|
|
|
CCACHE_DISABLE=1
|
|
|
|
|
</pre>
|
|
|
|
|
before running <b>make</b> to build PCRE, so that <b>ccache</b> is not used.
|
|
|
|
|
</P>
|
|
|
|
|
<P>
|
|
|
|
|
When --enable-coverage is used, the following addition targets are added to the
|
|
|
|
|
<i>Makefile</i>:
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage
|
|
|
|
|
</pre>
|
|
|
|
|
This creates a fresh coverage report for the PCRE test suite. It is equivalent
|
|
|
|
|
to running "make coverage-reset", "make coverage-baseline", "make check", and
|
|
|
|
|
then "make coverage-report".
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-reset
|
|
|
|
|
</pre>
|
|
|
|
|
This zeroes the coverage counters, but does nothing else.
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-baseline
|
|
|
|
|
</pre>
|
|
|
|
|
This captures baseline coverage information.
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-report
|
|
|
|
|
</pre>
|
|
|
|
|
This creates the coverage report.
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-clean-report
|
|
|
|
|
</pre>
|
|
|
|
|
This removes the generated coverage report without cleaning the coverage data
|
|
|
|
|
itself.
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-clean-data
|
|
|
|
|
</pre>
|
|
|
|
|
This removes the captured coverage data without removing the coverage files
|
|
|
|
|
created at compile time (*.gcno).
|
|
|
|
|
<pre>
|
|
|
|
|
make coverage-clean
|
|
|
|
|
</pre>
|
|
|
|
|
This cleans all coverage data including the generated coverage report. For more
|
|
|
|
|
information about code coverage, see the <b>gcov</b> and <b>lcov</b>
|
|
|
|
|
documentation.
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC22" href="#TOC1">SEE ALSO</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
<b>pcreapi</b>(3), <b>pcre16</b>, <b>pcre32</b>, <b>pcre_config</b>(3).
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC23" href="#TOC1">AUTHOR</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
|
|
|
|
Philip Hazel
|
|
|
|
|
<br>
|
|
|
|
|
University Computing Service
|
|
|
|
|
<br>
|
|
|
|
|
Cambridge CB2 3QH, England.
|
|
|
|
|
<br>
|
|
|
|
|
</P>
|
2014-07-05 15:53:30 +04:00
|
|
|
<br><a name="SEC24" href="#TOC1">REVISION</a><br>
|
2014-07-05 02:28:24 +04:00
|
|
|
<P>
|
2014-07-05 15:53:30 +04:00
|
|
|
Last updated: 12 May 2013
|
2014-07-05 02:28:24 +04:00
|
|
|
<br>
|
2014-07-05 15:53:30 +04:00
|
|
|
Copyright © 1997-2013 University of Cambridge.
|
2014-07-05 02:28:24 +04:00
|
|
|
<br>
|
|
|
|
|
<p>
|
|
|
|
|
Return to the <a href="index.html">PCRE index page</a>.
|
|
|
|
|
</p>
|
