ax_check_pcre2 (Autoconf Archive)

ax_check_pcre2

Synopsis

AX_CHECK_PCRE2([bits], [action-if-found], [action-if-not-found])

Description

Search for an installed libpcre2-8 library. If nothing was specified when calling configure, it searches first in /usr/local and then in /usr, /opt/local and /sw. If the –with-pcre2=DIR is specified, it will try to find it in DIR/include/pcre2.h and DIR/lib/libpcre2-8. If –without-pcre2 is specified, the library is not searched at all.

If ’bits’ is empty or ’8’, PCRE2 8-bit character support is checked only. If ’bits’ contains ’16’, PCRE2 8-bit and 16-bit character support are checked. If ’bits’ contains ’32’, PCRE2 8-bit and 32-bit character support are checked. When ’bits’ contains both ’16’ and ’32’, PCRE2 8-bit, 16-bit, and 32-bit character support is checked.

If either the header file (pcre2.h), or the library (libpcre2-8) is not found, or the specified PCRE2 character bit width is not supported, shell commands ’action-if-not-found’ is run. If ’action-if-not-found’ is not specified, the configuration exits on error, asking for a valid PCRE2 installation directory or –without-pcre2.

If both header file and library are found, and the specified PCRE2 bit widths are supported, shell commands ’action-if-found’ is run. If ’action-if-found’ is not specified, the default action appends ’-I${PCRE2_HOME}/include’ to CPFLAGS, appends ’-L$PCRE2_HOME}/lib’ to LDFLAGS, prepends ’-lpcre2-8’ to LIBS, and calls AC_DEFINE(HAVE_PCRE2). You should use autoheader to include a definition for this symbol in a config.h file. Sample usage in a C/C++ source is as follows:

  #ifdef HAVE_PCRE2
  #define PCRE2_CODE_UNIT_WIDTH 8
  #include <pcre2.h>
  #endif /* HAVE_PCRE2 */

Source Code

Download the latest version of ax_check_pcre2.m4 or browse the macro’s revision history.

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.

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