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This commit is contained in:
John Wiegley 2009-11-08 13:36:21 -05:00
commit 55c7792c93
22 changed files with 210 additions and 104 deletions
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2
.gitignore vendored
View file

@ -61,5 +61,7 @@
/shave-libtool
/stamp-h1
/test/python/
/tmpcvs*/
/tmpwrk*/
/util_tests
/mkinstalldirs

26
acprep
View file

@ -234,7 +234,7 @@ class PrepareBuild(CommandLineApp):
type='int', action='store', dest='jobs',
default=1, help='Allow N make jobs at once')
op.add_option('', '--boost', metavar='SUFFIX',
action="callback",
action="callback", type="string",
callback=self.option_boost,
help='Set Boost library suffix (ex: "--boost=-mt")')
op.add_option('', '--force', action="callback",
@ -751,6 +751,10 @@ class PrepareBuild(CommandLineApp):
self.sys_include_dirs.insert(0, '/usr/local/stow/cppunit/include')
self.sys_library_dirs.insert(0, '/usr/local/stow/cppunit/lib')
if exists('/usr/local/stow/icu/include'):
self.sys_include_dirs.insert(0, '/usr/local/stow/icu/include')
self.sys_library_dirs.insert(0, '/usr/local/stow/icu/lib')
self.CXXFLAGS.append('-march=nocona')
self.CXXFLAGS.append('-msse3')
self.CPPFLAGS.append('-D_GLIBCXX_FULLY_DYNAMIC_STRING=1')
@ -979,6 +983,14 @@ class PrepareBuild(CommandLineApp):
self.sys_include_dirs.insert(0, '/usr/local/stow/cppunit-debug/include')
self.sys_library_dirs.insert(0, '/usr/local/stow/cppunit-debug/lib')
if exists('/usr/local/stow/icu-debug/include'):
if '/usr/local/stow/icu/include' in self.sys_include_dirs:
self.sys_include_dirs.remove('/usr/local/stow/icu/include')
self.sys_library_dirs.remove('/usr/local/stow/icu/lib')
self.sys_include_dirs.insert(0, '/usr/local/stow/icu-debug/include')
self.sys_library_dirs.insert(0, '/usr/local/stow/icu-debug/lib')
if exists('/opt/local/lib/libboost_regex-d.a'):
self.envvars['BOOST_HOME'] = '/opt/local'
self.envvars['BOOST_SUFFIX'] = '-d'
@ -995,6 +1007,14 @@ class PrepareBuild(CommandLineApp):
self.envvars['BOOST_SUFFIX'])
self.sys_include_dirs.append('/usr/local/include/boost-1_40')
elif exists('/usr/local/lib/libboost_regex-xgcc44-d-1_40.a'):
self.envvars['BOOST_HOME'] = '/usr/local'
self.envvars['BOOST_SUFFIX'] = '-xgcc44-d-1_40'
self.log.info('Setting BOOST_SUFFIX => %s' %
self.envvars['BOOST_SUFFIX'])
self.sys_include_dirs.append('/usr/local/include/boost-1_40')
else:
if exists('/opt/local/lib/libboost_regex.a'):
self.envvars['BOOST_HOME'] = '/opt/local'
@ -1005,9 +1025,9 @@ class PrepareBuild(CommandLineApp):
self.sys_include_dirs.append('/opt/local/include/boost')
elif exists('/usr/local/lib/libboost_regex-xgcc44-s-1_40.a'):
elif exists('/usr/local/lib/libboost_regex-xgcc44-1_40.a'):
self.envvars['BOOST_HOME'] = '/usr/local'
self.envvars['BOOST_SUFFIX'] = '-xgcc44-s-1_40'
self.envvars['BOOST_SUFFIX'] = '-xgcc44-1_40'
self.log.info('Setting BOOST_SUFFIX => %s' %
self.envvars['BOOST_SUFFIX'])

2
doc/sample.dat
View file

@ -24,7 +24,7 @@ N $
Income:Salary
2004/05/14 * Another dày in which there is Páying
Русский язык:Русский язык:Русский язык:Русский язык $1000.00
Русский язык:Активы:Русский язык:Русский язык $1000.00
Income:Salary
2004/05/27 Book Store

71
lib/Makefile
View file

@ -2,34 +2,79 @@
# This is only important if you intend to produce a Ledger binary for
# installation.
#ARCH_CFLAGS = -g -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.5.sdk
#ARCH_LDFLAGS = -g -arch i386 -arch ppc -Wl,-syslibroot,/Developer/SDKs/MacOSX10.5.sdk
STOW_ROOT = /usr/local/stow
PRODUCTS = $(HOME)/Products
EXTRA_DEFINES = -D_GLIBCXX_FULLY_DYNAMIC_STRING=1
BOOST_SOURCE = boost
BOOST_VERSION = 1_40_0
BOOST_TOOLSET = darwin
BOOST_DEFINES = define=_GLIBCXX_FULLY_DYNAMIC_STRING=1
BOOST_FLAGS = --toolset=$(BOOST_TOOLSET) \
--build-type=complete --layout=versioned \
$(BOOST_DEFINES)
ICU_FLAGS = -sHAVE_ICU=1 -sICU_PATH=$(STOW_ROOT)/icu
ICU_DBG_FLAGS = -sHAVE_ICU=1 -sICU_PATH=$(STOW_ROOT)/icu-debug
icu-release:
-(cd icu/source; make distclean)
(cd icu/source; sh autogen.sh; \
./configure CPPFLAGS="$(EXTRA_DEFINES)" \
CFLAGS="$(EXTRA_DEFINES) $(ARCH_CFLAGS)" \
LDFLAGS="$(ARCH_LDFLAGS)" \
CC="$(CC)" CXX="$(CXX)" LD="$(LD)" \
--enable-static \
--prefix=$(STOW_ROOT)/icu && \
make install)
icu-debug:
-(cd icu/source; make distclean)
(cd icu/source; sh autogen.sh; \
./configure CPPFLAGS="-D_GLIBCXX_DEBUG=1 $(EXTRA_DEFINES)" \
CFLAGS="-g $(EXTRA_DEFINES) $(ARCH_CFLAGS)" \
LDFLAGS="-g $(ARCH_LDFLAGS)" \
CC="$(CC)" CXX="$(CXX)" LD="$(LD)" \
--enable-static --enable-debug \
--prefix=$(STOW_ROOT)/icu-debug && \
make install)
icu-build: icu-release icu-debug
boost-icu-release:
(cd $(BOOST_SOURCE) && \
bjam release --prefix=$(STOW_ROOT)/boost_$(BOOST_VERSION)-icu \
--build-dir=$(PRODUCTS)/boost_$(BOOST_VERSION)-icu \
$(BOOST_FLAGS) $(ICU_FLAGS) install)
boost-icu-debug:
(cd $(BOOST_SOURCE) && \
bjam debug --prefix=$(STOW_ROOT)/boost_$(BOOST_VERSION)-icu \
--build-dir=$(PRODUCTS)/boost_$(BOOST_VERSION)-icu \
$(BOOST_FLAGS) define=_GLIBCXX_DEBUG=1 \
$(ICU_DBG_FLAGS) install)
boost-icu-build: boost-icu-release boost-icu-debug
# architecture=combined
boost-release:
(cd $(BOOST_SOURCE) && \
bjam release --prefix=$(STOW_ROOT)/boost_$(BOOST_VERSION) \
--build-dir=$(HOME)/Products/boost_$(BOOST_VERSION) \
--toolset=darwin --build-type=complete --layout=versioned install)
--build-dir=$(PRODUCTS)/boost_$(BOOST_VERSION) \
$(BOOST_FLAGS) install)
boost-debug:
(cd $(BOOST_SOURCE) && \
bjam debug --prefix=$(STOW_ROOT)/boost_$(BOOST_VERSION) \
--build-dir=$(HOME)/Products/boost_$(BOOST_VERSION) \
--toolset=darwin --build-type=complete --layout=versioned \
define=_GLIBCXX_DEBUG=1 install)
--build-dir=$(PRODUCTS)/boost_$(BOOST_VERSION) \
$(BOOST_FLAGS) define=_GLIBCXX_DEBUG=1 install)
boost-build: boost-release boost-debug
cppunit-release:
-(cd cppunit; make distclean)
(cd cppunit; sh autogen.sh; \
./configure CFLAGS="$(ARCH_CFLAGS)" \
./configure CPPFLAGS="$(EXTRA_DEFINES)" \
CFLAGS="$(EXTRA_DEFINES) $(ARCH_CFLAGS)" \
LDFLAGS="$(ARCH_LDFLAGS)" \
CC="$(CC)" CXX="$(CXX)" LD="$(LD)" \
--prefix=$(STOW_ROOT)/cppunit && \
@ -38,8 +83,8 @@ cppunit-release:
cppunit-debug:
-(cd cppunit; make distclean)
(cd cppunit; sh autogen.sh; \
./configure CPPFLAGS="-D_GLIBCXX_DEBUG=1" \
CFLAGS="-g $(ARCH_CFLAGS)" \
./configure CPPFLAGS="-D_GLIBCXX_DEBUG=1 $(EXTRA_DEFINES)" \
CFLAGS="-g $(EXTRA_DEFINES) $(ARCH_CFLAGS)" \
LDFLAGS="-g $(ARCH_LDFLAGS)" \
CC="$(CC)" CXX="$(CXX)" LD="$(LD)" \
--prefix=$(STOW_ROOT)/cppunit-debug && \
@ -47,4 +92,4 @@ cppunit-debug:
cppunit-build: cppunit-release cppunit-debug
build-all: boost-build cppunit-build
all: boost-build boost-icu-build cppunit-build

4
src/commodity.cc
View file

@ -512,7 +512,7 @@ void commodity_t::parse_symbol(std::istream& in, string& symbol)
for (std::size_t i = 0; i < bytes; i++) {
in.get(c);
if (in.bad() || in.eof())
break;
throw_(amount_error, _("Invalid UTF-8 encoding for commodity name"));
*_p++ = c;
}
}
@ -526,7 +526,7 @@ void commodity_t::parse_symbol(std::istream& in, string& symbol)
if (c == '\\') {
in.get(c);
if (in.eof())
break;
throw_(amount_error, _("Backslash at end of commodity name"));
}
*_p++ = c;
}

6
src/derive.cc
View file

@ -307,7 +307,7 @@ namespace {
DEBUG("derive.xact", "Setting note from match: " << *added->note);
#endif
} else {
added->payee = tmpl.payee_mask.expr.str();
added->payee = tmpl.payee_mask.str();
DEBUG("derive.xact", "Setting payee from template: " << added->payee);
}
@ -403,14 +403,14 @@ namespace {
account_t * acct = NULL;
if (! acct) {
acct = journal.find_account_re(post.account_mask->expr.str());
acct = journal.find_account_re(post.account_mask->str());
#if defined(DEBUG_ON)
if (acct)
DEBUG("derive.xact", "Found account as a regular expression");
#endif
}
if (! acct) {
acct = journal.find_account(post.account_mask->expr.str());
acct = journal.find_account(post.account_mask->str());
#if defined(DEBUG_ON)
if (acct)
DEBUG("derive.xact", "Found (or created) account by name");

10
src/global.cc
View file

@ -469,14 +469,6 @@ void global_scope_t::normalize_report_options(const string& verb)
else if (verb == "equity") {
rep.HANDLER(equity).on_only(string("?normalize"));
}
else if (rep.HANDLED(related)) {
if (verb[0] == 'r') {
rep.HANDLER(invert).on_only(string("?normalize"));
} else {
rep.HANDLER(subtotal).on_only(string("?normalize"));
rep.HANDLER(related_all).on_only(string("?normalize"));
}
}
if (verb == "print")
rep.HANDLER(limit_).on(string("?normalize"), "actual");
@ -538,6 +530,8 @@ void global_scope_t::normalize_report_options(const string& verb)
cols = rep.HANDLER(columns_).value.to_long();
else if (const char * columns = std::getenv("COLUMNS"))
cols = lexical_cast<long>(columns);
else
cols = 80L;
if (cols > 0) {
DEBUG("auto.columns", "cols = " << cols);

2
src/journal.cc
View file

@ -83,7 +83,7 @@ journal_t::~journal_t()
void journal_t::initialize()
{
master = new account_t;
basket = NULL;
bucket = NULL;
was_loaded = false;
commodity_pool.reset(new commodity_pool_t);

4
src/journal.h
View file

@ -115,7 +115,7 @@ public:
};
account_t * master;
account_t * basket;
account_t * bucket;
xacts_list xacts;
auto_xacts_list auto_xacts;
period_xacts_list period_xacts;
@ -202,7 +202,7 @@ private:
template<class Archive>
void serialize(Archive& ar, const unsigned int /* version */) {
ar & master;
ar & basket;
ar & bucket;
ar & xacts;
ar & auto_xacts;
ar & period_xacts;

6
src/mask.cc
View file

@ -43,7 +43,11 @@ mask_t::mask_t(const string& pat) : expr()
mask_t& mask_t::operator=(const string& pat)
{
expr.assign(pat.c_str(), regex::perl | regex::icase);
#if defined(HAVE_BOOST_REGEX_UNICODE)
expr = boost::make_u32regex(pat.c_str(), boost::regex::perl | boost::regex::icase);
#else
expr.assign(pat.c_str(), boost::regex::perl | boost::regex::icase);
#endif
VERIFY(valid());
return *this;
}

43
src/mask.h
View file

@ -45,6 +45,9 @@
#define _MASK_H
#include "utils.h"
#if defined(HAVE_BOOST_REGEX_UNICODE)
#include "unistring.h"
#endif
namespace ledger {
@ -56,7 +59,11 @@ namespace ledger {
class mask_t
{
public:
#if defined(HAVE_BOOST_REGEX_UNICODE)
boost::u32regex expr;
#else
boost::regex expr;
#endif
explicit mask_t(const string& pattern);
@ -76,17 +83,41 @@ public:
return expr == other.expr;
}
bool match(const string& str) const {
bool match(const string& text) const {
#if defined(HAVE_BOOST_REGEX_UNICODE)
DEBUG("mask.match",
"Matching: \"" << str << "\" =~ /" << expr.str() << "/ = "
<< (boost::regex_search(str, expr) ? "true" : "false"));
return boost::regex_search(str, expr);
"Matching: \"" << text << "\" =~ /" << str() << "/ = "
<< (boost::u32regex_search(text, expr) ? "true" : "false"));
return boost::u32regex_search(text, expr);
#else
DEBUG("mask.match",
"Matching: \"" << text << "\" =~ /" << str() << "/ = "
<< (boost::regex_search(text, expr) ? "true" : "false"));
return boost::regex_search(text, expr);
#endif
}
bool empty() const {
return expr.empty();
}
string str() const {
if (! empty()) {
#if defined(HAVE_BOOST_REGEX_UNICODE)
assert(sizeof(boost::uint32_t) == sizeof(UChar32));
unistring ustr;
std::basic_string<UChar32> expr_str = expr.str();
std::copy(expr_str.begin(), expr_str.end(),
std::back_inserter(ustr.utf32chars));
return ustr.extract();
#else
return expr.str();
#endif
} else {
return empty_string;
}
}
bool valid() const {
if (expr.status() != 0) {
DEBUG("ledger.validate", "mask_t: expr.status() != 0");
@ -108,7 +139,7 @@ private:
ar & temp;
*this = temp;
} else {
temp = expr.str();
temp = str();
ar & temp;
}
}
@ -116,7 +147,7 @@ private:
};
inline std::ostream& operator<<(std::ostream& out, const mask_t& mask) {
out << mask.expr.str();
out << mask.str();
return out;
}

2
src/post.cc
View file

@ -246,7 +246,7 @@ namespace {
if (env.value_at(0).is_string())
account = master->find_account(env.get<string>(0), false);
else if (env.value_at(0).is_mask())
account = master->find_account_re(env.get<mask_t>(0).expr.str());
account = master->find_account_re(env.get<mask_t>(0).str());
} else {
account = env->reported_account();
}

13
src/py_journal.cc
View file

@ -166,6 +166,11 @@ namespace {
journal.xact_finalize_hooks.run_hooks(xact, post);
}
std::size_t py_read(journal_t& journal, const string& pathname)
{
return journal.read(pathname);
}
} // unnamed namespace
void export_journal()
@ -193,10 +198,10 @@ void export_journal()
.add_property("master", make_getter(&journal_t::master,
return_internal_reference<>()))
.add_property("basket",
make_getter(&journal_t::basket,
.add_property("bucket",
make_getter(&journal_t::bucket,
return_internal_reference<>()),
make_setter(&journal_t::basket))
make_setter(&journal_t::bucket))
.add_property("was_loaded", make_getter(&journal_t::was_loaded))
.add_property("commodity_pool",
make_getter(&journal_t::commodity_pool,
@ -236,6 +241,8 @@ void export_journal()
.def("sources", range<return_internal_reference<> >
(&journal_t::sources_begin, &journal_t::sources_end))
.def("read", py_read)
.def("clear_xdata", &journal_t::clear_xdata)
.def("valid", &journal_t::valid)

22
src/pyinterp.cc
View file

@ -255,7 +255,17 @@ value_t python_interpreter_t::python_command(call_scope_t& args)
std::strcpy(argv[i + 1], arg.c_str());
}
int status = Py_Main(static_cast<int>(args.size()) + 1, argv);
int status;
try {
status = Py_Main(static_cast<int>(args.size()) + 1, argv);
}
catch (...) {
for (std::size_t i = 0; i < args.size() + 1; i++)
delete[] argv[i];
delete[] argv;
throw;
}
for (std::size_t i = 0; i < args.size() + 1; i++)
delete[] argv[i];
@ -287,6 +297,9 @@ expr_t::ptr_op_t python_interpreter_t::lookup(const symbol_t::kind_t kind,
switch (kind) {
case symbol_t::FUNCTION:
if (option_t<python_interpreter_t> * handler = lookup_option(name.c_str()))
return MAKE_OPT_FUNCTOR(python_interpreter_t, handler);
if (is_initialized && main_nspace.has_key(name.c_str())) {
DEBUG("python.interp", "Python lookup: " << name);
@ -354,14 +367,7 @@ value_t python_interpreter_t::functor_t::operator()(call_scope_t& args)
std::signal(SIGINT, sigint_handler);
if (val.check())
return val();
#if 1
// jww (2009-02-24): Distinguish between "no return" and values with
// unconvertable type
return NULL_VALUE;
#else
throw_(calc_error,
_("Could not evaluate Python variable '%1'") << name);
#endif
}
else if (args.size() > 0) {
list arglist;

2
src/report.cc
View file

@ -322,7 +322,7 @@ value_t report_t::fn_account_total(call_scope_t& args)
acct = session.journal->find_account(name, false);
}
else if (args[0].is_mask()) {
name = args[0].as_mask().expr.str();
name = args[0].as_mask().str();
acct = session.journal->find_account_re(name);
}
else {

36
src/report.h
View file

@ -869,16 +869,7 @@ public:
});
OPTION_(report_t, wide, DO() { // -w
parent->HANDLER(date_width_).on_with(string("--wide"), 9L);
parent->HANDLER(date_width_).specified = true;
parent->HANDLER(payee_width_).on_with(string("--wide"), 35L);
parent->HANDLER(payee_width_).specified = true;
parent->HANDLER(account_width_).on_with(string("--wide"), 39L);
parent->HANDLER(account_width_).specified = true;
parent->HANDLER(amount_width_).on_with(string("--wide"), 22L);
parent->HANDLER(amount_width_).specified = true;
parent->HANDLER(total_width_).on_with(string("--wide"), 22L);
parent->HANDLER(total_width_).specified = true;
parent->HANDLER(columns_).on_with(string("--wide"), 132L);
});
OPTION_(report_t, yearly, DO() { // -Y
@ -887,38 +878,23 @@ public:
OPTION__(report_t, date_width_,
bool specified;
CTOR(report_t, date_width_) {
on_with(none, 9L);
specified = false;
}
CTOR(report_t, date_width_) { specified = false; }
DO_(args) { value = args[1].to_long(); specified = true; });
OPTION__(report_t, payee_width_,
bool specified;
CTOR(report_t, payee_width_) {
on_with(none, 20L);
specified = false;
}
CTOR(report_t, payee_width_) { specified = false; }
DO_(args) { value = args[1].to_long(); specified = true; });
OPTION__(report_t, account_width_,
bool specified;
CTOR(report_t, account_width_) {
on_with(none, 23L);
specified = false;
}
CTOR(report_t, account_width_) { specified = false; }
DO_(args) { value = args[1].to_long(); specified = true; });
OPTION__(report_t, amount_width_,
bool specified;
CTOR(report_t, amount_width_) {
on_with(none, 12L);
specified = false;
}
CTOR(report_t, amount_width_) { specified = false; }
DO_(args) { value = args[1].to_long(); specified = true; });
OPTION__(report_t, total_width_,
bool specified;
CTOR(report_t, total_width_) {
on_with(none, 12L);
specified = false;
}
CTOR(report_t, total_width_) { specified = false; }
DO_(args) { value = args[1].to_long(); specified = true; });
};

4
src/system.hh.in
View file

@ -164,7 +164,11 @@ typedef std::ostream::pos_type ostream_pos_type;
#include <boost/random/uniform_int.hpp>
#include <boost/random/uniform_real.hpp>
#include <boost/random/variate_generator.hpp>
#if defined(HAVE_BOOST_REGEX_UNICODE)
#include <boost/regex/icu.hpp>
#else
#include <boost/regex.hpp>
#endif // HAVE_BOOST_REGEX_UNICODE
#include <boost/variant.hpp>
#include <boost/version.hpp>

15
src/textual.cc
View file

@ -442,8 +442,8 @@ void instance_t::default_commodity_directive(char * line)
void instance_t::default_account_directive(char * line)
{
journal.basket = account_stack.front()->find_account(skip_ws(line + 1));
journal.basket->add_flags(ACCOUNT_KNOWN);
journal.bucket = account_stack.front()->find_account(skip_ws(line + 1));
journal.bucket->add_flags(ACCOUNT_KNOWN);
}
void instance_t::price_conversion_directive(char * line)
@ -487,18 +487,9 @@ void instance_t::option_directive(char * line)
*p++ = '\0';
}
#if 0
if (! process_option(pathname.string(), line + 2, scope, p, line) &&
! dynamic_cast<session_t *>(&scope)) {
if (std::strlen(line + 2) == 1)
throw_(option_error, _("Illegal option -%1") << line + 2);
else
if (! process_option(pathname.string(), line + 2, scope, p, line))
throw_(option_error, _("Illegal option --%1") << line + 2);
}
#else
process_option(pathname.string(), line + 2, scope, p, line);
#endif
}
void instance_t::automated_xact_directive(char * line)
{

7
src/unistring.h
View file

@ -59,12 +59,15 @@ namespace ledger {
*/
class unistring
{
public:
std::vector<boost::uint32_t> utf32chars;
public:
unistring() {
TRACE_CTOR(unistring, "");
}
unistring(const std::string& input)
{
TRACE_CTOR(unistring, "");
TRACE_CTOR(unistring, "std::string");
const char * p = input.c_str();
std::size_t len = input.length();

4
src/xact.cc
View file

@ -156,8 +156,8 @@ bool xact_base_t::finalize()
// If there is only one post, balance against the default account if one has
// been set.
if (journal && journal->basket && posts.size() == 1 && ! balance.is_null()) {
null_post = new post_t(journal->basket, ITEM_GENERATED);
if (journal && journal->bucket && posts.size() == 1 && ! balance.is_null()) {
null_post = new post_t(journal->bucket, ITEM_GENERATED);
null_post->_state = (*posts.begin())->_state;
add_post(null_post);
}

23
tools/configure.ac
View file

@ -193,6 +193,29 @@ else
AC_MSG_FAILURE("Could not find boost_regex library (set CPPFLAGS and LDFLAGS?)")
fi
AC_CACHE_CHECK(
[if boost_regex w/ICU is available],
[boost_regex_icu_avail_cv_],
[boost_regex_icu_save_libs=$LIBS
LIBS="-licuuc $LIBS"
AC_LANG_PUSH(C++)
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <boost/regex/icu.hpp>
using namespace boost;]],
[[std::string text = "Активы";
u32regex r = make_u32regex("активы", regex::perl | regex::icase);
return u32regex_search(text, r) ? 0 : 1;]])],
[boost_regex_icu_avail_cv_=true],
[boost_regex_icu_avail_cv_=false])
AC_LANG_POP
LIBS=$boost_regex_icu_save_libs])
if [test x$boost_regex_icu_avail_cv_ = xtrue ]; then
AC_DEFINE([HAVE_BOOST_REGEX_UNICODE], [1], [If the boost_regex library w/ICU is available])
LIBS="-licuuc $LIBS"
fi
# check for boost_date_time
AC_CACHE_CHECK(
[if boost_date_time is available],