Source of pcre.m4 - Zabbix

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    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:
AC_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 "$withval" = "yes"; then
                want_libpcre=yes
                if test -f /usr/local/include/pcre.h; then
                    withval="/usr/local"
                else
                    withval="/usr"
                fi
            else
                want_libpcre=no
                _libpcre_dir_lib="$withval/lib"
    [
        if test "$withval" != "no"; then
            want_libpcre=yes
            if test "$withval" != "yes"; then
                libpcre_dir="$withval"
            fi
            _libpcre_dir="$withval"
            test "x$withval" = "xyes" && withval=/usr
            LIBPCRE_CFLAGS="-I$withval/include"
            LIBPCRE_LDFLAGS="-L$withval/lib"
            _libpcre_dir_set="yes"
        ]
    )
​
    AC_ARG_WITH([libpcre-include],
        AC_HELP_STRING([--with-libpcre-include@<:@=DIR@:>@],
            [use libpcre include headers from given path.]
        ),
        [
            LIBPCRE_CFLAGS="-I$withval"
            _libpcre_dir_set="yes"
        ]
    )
​
    AC_ARG_WITH([libpcre-lib],
        AC_HELP_STRING([--with-libpcre-lib@<:@=DIR@:>@],
            [use libpcre libraries from given path.]
        ),
        [
            _libpcre_dir="$withval"
            _libpcre_dir_lib="$withval"
            LIBPCRE_LDFLAGS="-L$withval"
            _libpcre_dir_set="yes"
        ]
    )
​
    if test "x$enable_static_libs" = "xyes"; then
        fi
    ])
​
    AC_ARG_WITH([libpcre-include], AC_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 $libpcre_include_dir/pcre.h])
        fi
    ])
​
    AC_ARG_WITH([libpcre-lib], AC_HELP_STRING([--with-libpcre-lib@<:@=DIR@:>@], [use libpcre libraries from given path.]), [
        want_libpcre="yes"
        libpcre_lib_dir="$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 "$1" != "flags-only"; then
        AC_REQUIRE([PKG_PROG_PKG_CONFIG])
        PKG_PROG_PKG_CONFIG()
        test -z "$PKG_CONFIG" -a -z "$_libpcre_dir_lib" && AC_MSG_ERROR([Not found pkg-config library])
        m4_pattern_allow([^PKG_CONFIG_LIBDIR$])
    fi
        m4_ifdef([PKG_PROG_PKG_CONFIG], [PKG_PROG_PKG_CONFIG()], [:])
​
    AC_MSG_CHECKING(for libpcre support)
        if test -n "$PKG_CONFIG"; then
            #
            # got pkg-config, use that
            #
​
    LIBPCRE_LIBS="-lpcre"
            m4_pattern_allow([^PKG_CONFIG_LIBDIR$])
​
    if test "x$enable_static" = "xyes"; then
        LIBPCRE_LIBS=" $LIBPCRE_LIBS -lpthread"
    elif test "x$enable_static_libs" = "xyes" -a -z "$PKG_CONFIG"; then
        LIBPCRE_LIBS="$_libpcre_dir_lib/libpcre.a"
    elif test "x$enable_static_libs" = "xyes"; then
            if test -n "$libpcre_lib_dir"; then
                export PKG_CONFIG_LIBDIR="$libpcre_lib_dir/pkgconfig"
            elif test -n "$libpcre_dir"; then
                export PKG_CONFIG_LIBDIR="$libpcre_dir/lib/pkgconfig"
            fi
​
        test "x$static_linking_support" = "xno" -a -z "$_libpcre_dir_lib" && AC_MSG_ERROR(["Compiler not support statically linked libs from default folders"])
            AC_RUN_LOG([$PKG_CONFIG --exists --print-errors libpcre]) || {
                AC_MSG_ERROR([cannot find pkg-config package for libpcre])
            }
​
        if test -z "$_libpcre_dir_lib"; then
            PKG_CHECK_EXISTS(libpcre,[
                LIBPCRE_LIBS=`$PKG_CONFIG --static --libs libpcre`
            ],[
                AC_MSG_ERROR([Not found libpcre package])
            ])
        else
            AC_RUN_LOG([PKG_CONFIG_LIBDIR="$_libpcre_dir_lib/pkgconfig" $PKG_CONFIG --exists --print-errors libpcre]) || AC_MSG_ERROR(["Not found libpcre package in $_libpcre_dir/lib/pkgconfig"])
            LIBPCRE_LIBS=`PKG_CONFIG_LIBDIR="$_libpcre_dir_lib/pkgconfig" $PKG_CONFIG --static --libs libpcre`
            test -z "$LIBPCRE_LIBS" && LIBPCRE_LIBS=`PKG_CONFIG_LIBDIR="$_libpcre_dir_lib/pkgconfig" $PKG_CONFIG --libs libpcre`
        fi
            if test -n "$libpcre_include_dir"; then
                LIBPCRE_CFLAGS="-I$libpcre_include_dir"
            else
                LIBPCRE_CFLAGS=`$PKG_CONFIG --cflags libpcre`
            fi
​
            LIBPCRE_LDFLAGS=`$PKG_CONFIG --libs-only-L libpcre`
            LIBPCRE_LIBS=`$PKG_CONFIG --libs-only-l libpcre`
​
            unset PKG_CONFIG_LIBDIR
​
        if test "x$static_linking_support" = "xno"; then
            LIBPCRE_LIBS=`echo "$LIBPCRE_LIBS"|sed "s|-lpcre|$_libpcre_dir_lib/libpcre.a|g"`
            found_libpcre="yes"
        else
            LIBPCRE_LIBS=`echo "$LIBPCRE_LIBS"|sed "s/-lpcre/${static_linking_support}static -lpcre ${static_linking_support}dynamic/g"`
            #
            # no pkg-config, trying to guess
            #
​
            AC_MSG_WARN([proceeding without pkg-config])
​
            LIBPCRE_LIBS="-lpcre"
​
            if test -n "$libpcre_dir"; then
                #
                # directories are given explicitly
                #
​
                if test -n "$libpcre_include_dir"; then
                    LIBPCRE_CFLAGS="-I$libpcre_include_dir"
                else
                    if test -f "$libpcre_dir/include/pcre.h"; then
                        LIBPCRE_CFLAGS="-I$libpcre_dir/include"
                    else
                        AC_MSG_ERROR([cannot find $libpcre_dir/include/pcre.h])
                    fi
                fi
​
                if test -n "$libpcre_lib_dir"; then
                    LIBPCRE_LDFLAGS="-L$libpcre_lib_dir"
                else
                    if test -d "$libpcre_dir/lib"; then
                        LIBPCRE_LDFLAGS="-L$libpcre_dir/lib"
                    else
                        AC_MSG_ERROR([cannot find $libpcre_dir/lib])
                    fi
                fi
​
                found_libpcre="yes"
            elif test -n "$libpcre_include_dir"; then
                LIBPCRE_CFLAGS="-I$libpcre_include_dir"
​
                if test -n "$libpcre_lib_dir"; then
                    LIBPCRE_LDFLAGS="-L$libpcre_lib_dir"
                fi
​
                found_libpcre="yes"
            elif test -n "$libpcre_lib_dir"; then
                LIBPCRE_LDFLAGS="-L$libpcre_lib_dir"
​
                found_libpcre="yes"
            else
                #
                # search default directories
                #
​
                if test -f /usr/include/pcre.h; then
                    found_libpcre="yes"
                elif test -f /usr/local/include/pcre.h; then
                    LIBPCRE_CFLAGS="-I/usr/local/include"
                    LIBPCRE_LDFLAGS="-L/usr/local/lib"
​
                    found_libpcre="yes"
                elif test -f /usr/pkg/include/pcre.h; then
                    LIBPCRE_CFLAGS="-I/usr/pkg/include"
                    LIBPCRE_LDFLAGS="-L/usr/pkg/lib"
                    LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS -Wl,-R/usr/pkg/lib"
​
                    found_libpcre="yes"
                elif test -f /opt/csw/include/pcre.h; then
                    LIBPCRE_CFLAGS="-I/opt/csw/include"
                    LIBPCRE_LDFLAGS="-L/opt/csw/lib"
​
                    if $(echo "$CFLAGS"|grep -q -- "-m64") ; then
                        LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS/64 -Wl,-R/opt/csw/lib/64"
                    else
                        LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS -Wl,-R/opt/csw/lib"
                    fi
​
                    found_libpcre="yes"
                else
                    found_libpcre="no"
                fi
            fi
        fi
    fi
​
    if test -n "$_libpcre_dir_set" -o -f /usr/include/pcre.h; then
        found_libpcre="yes"
    elif test -f /usr/local/include/pcre.h; then
        LIBPCRE_CFLAGS="-I/usr/local/include"
        LIBPCRE_LDFLAGS="-L/usr/local/lib"
        found_libpcre="yes"
    elif test -f /usr/pkg/include/pcre.h; then
        LIBPCRE_CFLAGS="-I/usr/pkg/include"
        LIBPCRE_LDFLAGS="-L/usr/pkg/lib"
        LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS -Wl,-R/usr/pkg/lib"
        found_libpcre="yes"
    elif test -f /opt/csw/include/pcre.h; then
        LIBPCRE_CFLAGS="-I/opt/csw/include"
        LIBPCRE_LDFLAGS="-L/opt/csw/lib"
        if $(echo "$CFLAGS"|grep -q -- "-m64") ; then
            LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS/64 -Wl,-R/opt/csw/lib/64"
        else
            LIBPCRE_LDFLAGS="$LIBPCRE_LDFLAGS -Wl,-R/opt/csw/lib"
​
        #
        # process --enable-static and --enable_static-libs flags
        #
​
        if test "x$enable_static" = "xyes"; then
            LIBPCRE_LIBS=" $LIBPCRE_LIBS -lpthread"
        elif test "x$enable_static_libs" = "xyes"; then
            if test "x$static_linking_support" == "xno"; then
                AC_MSG_WARN([compiler has no direct suppor for static linkage])
​
                if test -n "$libpcre_lib_dir"; then
                    if test -f "$libpcre_lib_dir/libpcre.a"; then
                        LIBPCRE_LIBS="$libpcre_lib_dir/libpcre.a"
                    else
                        AC_MSG_ERROR([cannot find $libpcre_lib_dir/libpcre.a])
                    fi
                elif test -n "$libpcre_dir"; then
                    if test -f "$libpcre_dir/lib/libpcre.a"; then
                        LIBPCRE_LIBS="$libpcre_dir/lib/libpcre.a"
                    else
                        AC_MSG_ERROR([cannot find $libpcre_dir/lib/libpcre.a])
                    fi
                else
                    AC_MSG_ERROR([libpcre directory must be given explicitly in this case])
                fi
            else
                LIBPCRE_LIBS="$LIBPCRE_LDFLAGS ${static_linking_support}static $LIBPCRE_LIBS ${static_linking_support}dynamic"
                LIBPCRE_LDFLAGS=""
            fi
        fi
        found_libpcre="yes"
    else
        found_libpcre="no"
        AC_MSG_RESULT(no)
    fi
​
    if test "x$found_libpcre" = "xyes"; then
        am_save_CFLAGS="$CFLAGS"
        am_save_LDFLAGS="$LDFLAGS"
        am_save_LIBS="$LIBS"
​
        CFLAGS="$CFLAGS $LIBPCRE_CFLAGS"
        LDFLAGS="$LDFLAGS $LIBPCRE_LDFLAGS"
        LIBS="$LIBS $LIBPCRE_LIBS"
        #
        # try building with pcre
        #
​
        found_libpcre="no"
        LIBPCRE_TRY_LINK([no])
        AC_MSG_CHECKING([for libpcre support])
​
        CFLAGS="$am_save_CFLAGS"
        LDFLAGS="$am_save_LDFLAGS"
        LIBS="$am_save_LIBS"
    fi
        if test "x$found_libpcre" = "xyes"; then
            am_save_CFLAGS="$CFLAGS"
            am_save_LDFLAGS="$LDFLAGS"
            am_save_LIBS="$LIBS"
​
    if test "x$found_libpcre" = "xyes"; then
        AC_MSG_RESULT(yes)
    else
        LIBPCRE_CFLAGS=""
        LIBPCRE_LDFLAGS=""
        LIBPCRE_LIBS=""
    fi
            CFLAGS="$CFLAGS $LIBPCRE_CFLAGS"
            LDFLAGS="$LDFLAGS $LIBPCRE_LDFLAGS"
            LIBS="$LIBS $LIBPCRE_LIBS"
​
            found_libpcre="no"
            LIBPCRE_TRY_LINK([no])
​
            if test "x$found_libpcre" = "xyes"; then
                AC_MSG_RESULT(yes)
            else
                AC_MSG_RESULT(no)
                if test "$1" = "mandatory"; then
                    AC_MSG_NOTICE([CFLAGS: $CFLAGS])
                    AC_MSG_NOTICE([LDFLAGS: $LDFLAGS])
                    AC_MSG_NOTICE([LIBS: $LIBS])
                    AC_MSG_ERROR([cannot build with libpcre])
                else
                    LIBPCRE_CFLAGS=""
                    LIBPCRE_LDFLAGS=""
                    LIBPCRE_LIBS=""
                fi
            fi
​
    AC_SUBST(LIBPCRE_CFLAGS)
    AC_SUBST(LIBPCRE_LDFLAGS)
    AC_SUBST(LIBPCRE_LIBS)
            CFLAGS="$am_save_CFLAGS"
            LDFLAGS="$am_save_LDFLAGS"
            LIBS="$am_save_LIBS"
        else
            AC_MSG_RESULT(no)
        fi
​
        AC_SUBST(LIBPCRE_CFLAGS)
        AC_SUBST(LIBPCRE_LDFLAGS)
        AC_SUBST(LIBPCRE_LIBS)
    fi
])dnl