Linux From Scratch - Version ml-12.4-28-multilib

Chapter 8. Installing Basic System Software

8.13. Pcre2-10.46

The pcre2 package contains a new generation of the Perl Compatible Regular Expression libraries.

Approximate build time: 0.5 SBU
Required disk space: 20 MB

8.13.1. Installation of Pcre2

Prepare pcre2 for compilation: 

./configure --prefix=/usr                       \
            --docdir=/usr/share/doc/pcre2-10.45 \
            --enable-unicode                    \
            --enable-jit                        \
            --enable-pcre2-16                   \
            --enable-pcre2-32                   \
            --enable-pcre2grep-libz             \
            --enable-pcre2grep-libbz2           \
            --enable-pcre2test-libreadline      \
            --disable-static

The meaning of the new configure options:

--enable-unicode

This option enables Unicode support and includes the functions for handling UTF-8/16/32 character strings in the library.

--enable-jit

This option enables Just-in-time compiling, which can greatly speed up pattern matching.

--enable-pcre2-16

This option enables 16 bit character support.

--enable-pcre2-32

This option enables 32 bit character support.

--enable-pcre2grep-libz

This option adds support for reading .gz compressed files to pcre2grep.

--enable-pcre2grep-libbz2

This option adds support for reading .bz2 compressed files to pcre2grep.

--enable-pcre2test-libreadline

This option adds line editing and history features to the pcre2test program.

Compile the package: 

make

To test the results, issue: 

make check

Install the package: 

make install

8.13.2. Installation of Pcre2 - 32bit

Clean previous build: 

make distclean

Prepare pcre2 for compilation: 

CC="gcc -m32" CXX="g++ -m32"               \
./configure --prefix=/usr                  \
            --libdir=/usr/lib32            \
            --host=i686-pc-linux-gnu       \
            --enable-unicode               \
            --enable-jit                   \
            --enable-pcre2-16              \
            --enable-pcre2-32              \
            --enable-pcre2grep-libz        \
            --enable-pcre2grep-libbz2      \
            --enable-pcre2test-libreadline \
            --disable-static

Compile the package: 

make

Install the package: 

make DESTDIR=$PWD/DESTDIR install
cp -Rv DESTDIR/usr/lib32/* /usr/lib32
rm -rf DESTDIR

8.13.3. Installation of Pcre2 - x32bit

Clean previous build: 

make distclean

Prepare pcre2 for compilation: 

CC="gcc -mx32" CXX="g++ -mx32"             \
./configure --prefix=/usr                  \
            --libdir=/usr/libx32           \
            --host=x86_64-pc-linux-gnux32  \
            --enable-unicode               \
            --enable-jit                   \
            --enable-pcre2-16              \
            --enable-pcre2-32              \
            --enable-pcre2grep-libz        \
            --enable-pcre2grep-libbz2      \
            --enable-pcre2test-libreadline \
            --disable-static

Compile the package: 

make

Install the package: 

make DESTDIR=$PWD/DESTDIR install
cp -Rv DESTDIR/usr/libx32/* /usr/libx32
rm -rf DESTDIR

8.13.4. Contents of Pcre2

Installed programs: pcre2grep and pcre2test
Installed library: libpcre2-8.so, libpcre2-16.so, libpcre2-32.so, and libpcre2-posix.so

Short Descriptions

pcre2grep

is a version of grep that understands Perl compatible regular expressions

pcre2test

can test a Perl compatible regular expression