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# LIBPCRE_CHECK_CONFIG ([DEFAULT-ACTION])

# ----------------------------------------------------------

#

# Checks for pcre.

#

# This macro #defines HAVE_PCRE_H if required header files are

# found, and sets @LIBPCRE_LDFLAGS@ and @LIBPCRE_CFLAGS@ to the necessary

# values.

#

# This macro 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.

​

AC_DEFUN([LIBPCRE_TRY_LINK],

[

AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#include <pcre.h>

]], [[

    const char* error = NULL;

    int error_offset = -1;

    pcre *regexp = pcre_compile("test", PCRE_UTF8, &error, &error_offset, NULL);

    pcre_free(regexp);

]])],[found_libpcre="yes"],[])

])dnl

​

AC_DEFUN([LIBPCRE_CHECK_CONFIG],

[

    want_libpcre=no

    found_libpcre=no

    libpcre_dir=""

    libpcre_include_dir=""

    libpcre_lib_dir=""

​

    #

    # process --with-* flags

    #

​

    AC_ARG_WITH([libpcre],[

If you want to specify libpcre installation directories:

AS_HELP_STRING([--with-libpcre@<:@=DIR@:>@], [use libpcre from given base install directory (DIR), default is to search through a number of common places for the libpcre files.])],

    [

        if test "$withval" != "no"; then

            want_libpcre=yes

            if test "$withval" != "yes"; then

                libpcre_dir="$withval"

            fi

        fi

    ])

​

    AC_ARG_WITH([libpcre-include], AS_HELP_STRING([--with-libpcre-include@<:@=DIR@:>@], [use libpcre include headers from given path.]), [

        want_libpcre="yes"

        libpcre_include_dir="$withval"

        if ! test -d "$libpcre_include_dir"; then

            AC_MSG_ERROR([cannot find $libpcre_include_dir directory])

        fi

        if ! test -f "$libpcre_include_dir/pcre.h"; then

            AC_MSG_ERROR([cannot find $libpcre_include_dir/pcre.h])

        fi

    ])

​

    AC_ARG_WITH([libpcre-lib], AS_HELP_STRING([--with-libpcre-lib@<:@=DIR@:>@], [use libpcre libraries from given path.]), [

        want_libpcre="yes"

        libpcre_lib_dir="$withval"

        if ! test -d "$libpcre_lib_dir"; then

            AC_MSG_ERROR([cannot find $libpcre_lib_dir directory])

        fi

    ])

​

​

    #

    # find actual compiler flags and include paths

    #

​

    if test "$1" != "flags-only"; then

        AC_REQUIRE([PKG_PROG_PKG_CONFIG])

        m4_ifdef([PKG_PROG_PKG_CONFIG], [PKG_PROG_PKG_CONFIG()], [:])

​

        if test -n "$PKG_CONFIG"; then

            #

            # got pkg-config, use that

            #

​

            m4_pattern_allow([^PKG_CONFIG_LIBDIR$])

​

            if test -n "$libpcre_lib_dir"; then

                export PKG_CONFIG_LIBDIR="$libpcre_lib_dir/pkgconfig"

            elif test -n "$libpcre_dir"; then

                export PKG_CONFIG_LIBDIR="$libpcre_dir/lib/pkgconfig"

            fi

​

            AC_RUN_LOG([$PKG_CONFIG --exists --print-errors libpcre]) || {