dnl Usage: LYX_CXX_STL_STRING : checks whether the C++ compiler
-dnl has a working stl string container, the check is really stupid
-dnl and could need some improvement.
+dnl has a std::string that is usable for LyX. LyX does not require this
+dnl std::string to be standard.
AC_DEFUN(LYX_CXX_STL_STRING,[
AC_REQUIRE([LYX_PROG_CXX])
AC_MSG_CHECKING(whether the included std::string should be used)
AC_ARG_WITH(included-string,
[ --with-included-string use LyX string class instead of STL string],
- [with_included_string=$withval],
- [AC_TRY_COMPILE([
+ [lyx_cv_with_included_string=$withval],
+ [AC_CACHE_CHECK([],lyx_cv_with_included_string,
+ [AC_TRY_COMPILE([
#include <string>
using std::string;
],[
+ // LyX has reduced its requirements on the basic_string
+ // implementation so that the basic_string supplied
+ // with gcc is usable. In particular this means that
+ // lyx does not use std::string::clear and not the
+ // strncmp version of std::string::compare. This is mainly
+ // done so that LyX can use precompiled C++ libraries that
+ // already uses the systems basic_string, e.g. gtk--
string a("hello there");
a.erase();
a = "hey";
- char s[] = "y";
- int t = a.compare(a.length() - 1, 1, s);
+ //char s[] = "y";
+ //int t = a.compare(a.length() - 1, 1, s);
a.erase();
],[
- with_included_string=no
+ lyx_cv_with_included_string=no
],[
- with_included_string=yes
-
+ lyx_cv_with_included_string=yes
+ ])
])
])
- if test x$with_included_string = xyes ; then
+ if test x$lyx_cv_with_included_string = xyes ; then
AC_DEFINE(USE_INCLUDED_STRING, 1,
[Define to use the lyxstring class bundled with LyX.])
lyx_flags="$lyx_flags included-string"
fi
- AM_CONDITIONAL(USE_LYXSTRING, test x$with_included_string = xyes)
- AC_MSG_RESULT([$with_included_string])
+ AM_CONDITIONAL(USE_LYXSTRING, test x$lyx_cv_with_included_string = xyes)
+dnl AC_MSG_RESULT([$with_included_string])
+])
+
+
+dnl Usage: LYX_CXX_GOOD_STD_STRING : checks whether the C++ compiler
+dnl has a std::string that is close to the standard. So close that
+dnl methods not found in "unstandard" std::strings are present here.
+AC_DEFUN(LYX_CXX_GOOD_STD_STRING,[
+ AC_REQUIRE([LYX_PROG_CXX])
+ AC_CACHE_CHECK([whether the systems std::string is really good],
+ [lyx_cv_std_string_good],
+ [AC_TRY_COMPILE([
+ #include <string>
+ using std::string;
+ ],[
+ // From a std::string that is supposed to be close to the
+ // standard we require at least three things:
+ // - clear() and erase()
+ // - the strncmp of compare()
+ // - push_back()
+ string a("hello there");
+ a.erase();
+ a = "hey";
+ char s[] = "y";
+ int t = a.compare(a.length() - 1, 1, s);
+ a.push_back('g');
+ a.clear();
+ ],[
+ lyx_cv_std_string_good=yes
+ ],[
+ lyx_cv_std_string_good=no
+
+ ])
+ ])
+ if test x$lyx_cv_std_string_good = xyes ; then
+ AC_DEFINE(STD_STRING_IS_GOOD, 1,
+ [Define is the systems std::string is really good.])
+ fi
])
dnl LYX_CXX_MUTABLE
AC_DEFUN(LYX_CXX_MUTABLE, [
-AC_REQUIRE([LYX_PROG_CXX])
-AC_MSG_CHECKING(if C++ compiler supports mutable)
-AC_TRY_COMPILE(
-[
-class k {
- mutable char *c;
-public:
- void foo() const { c=0; }
-};
-],[
-],[
- ac_mutable=yes
- AC_DEFINE(HAVE_MUTABLE, 1,
- [Defined if you compiler supports 'mutable'.])
-],[
- ac_mutable=no
-])
-AC_MSG_RESULT([$ac_mutable])
+ AC_REQUIRE([LYX_PROG_CXX])
+ AC_CACHE_CHECK([if C++ compiler supports mutable],
+ lyx_cv_cxx_mutable,[
+ AC_TRY_COMPILE(
+ [
+ class k {
+ mutable char *c;
+ public:
+ void foo() const { c=0; }
+ };
+ ],[
+ ],[
+ lyx_cv_cxx_mutable=yes
+ ],[
+ lyx_cv_cxx_mutable=no
+ ])
+ ])
+ if test $lyx_cv_cxx_mutable = yes ; then
+ AC_DEFINE(HAVE_MUTABLE, 1,
+ [Defined if your compiler suports 'mutable'.])
+ fi
])
dnl LYX_CXX_PARTIAL
AC_DEFUN(LYX_CXX_PARTIAL, [
-AC_REQUIRE([LYX_PROG_CXX])
-AC_MSG_CHECKING(if C++ compiler supports partial specialization)
-AC_TRY_COMPILE(
-[
-template<class T, class K>
-class k {
-public:
-};
-template<class T> class k<void,T> { };
-],[
- k<float, float> b;
- k<void,void> a;
-],[
- ac_partial_specialization=yes
- AC_DEFINE(HAVE_PARTIAL_SPECIALIZATION, 1,
- [Defined if your compiler supports partial specialization.])
-],[
- ac_partial_specialization=no
-])
-AC_MSG_RESULT([$ac_partial_specialization])
+ AC_REQUIRE([LYX_PROG_CXX])
+ AC_CACHE_CHECK([if C++ compiler supports partial specialization],
+ [lyx_cv_cxx_partial_specialization],
+ [AC_TRY_COMPILE(
+ [
+ template<class T, class K>
+ class k {
+ public:
+ };
+ template<class T> class k<void,T> { };
+ ],[
+ k<float, float> b;
+ k<void,void> a;
+ ],[
+ lyx_cv_cxx_partial_specialization=yes
+ ],[
+ lyx_cv_cxx_partial_specialization=no
+ ])
+ ])
+ if test x$lyx_cv_cxx_partial_specialization = xyes ; then
+ AC_DEFINE(HAVE_PARTIAL_SPECIALIZATION, 1,
+ [Defined if your compiler supports partial specialization.])
+ fi
])
dnl if true. This macro does not do a thourough test, but it should be
dnl good enough to suit our needs.
AC_DEFUN(LYX_CXX_NAMESPACES,[
-AC_CACHE_CHECK(for correct namespaces support,lyx_cv_cxx_namespace,
- [AC_TRY_COMPILE([
- namespace foo {
- int bar;
- }
-],[
+ AC_CACHE_CHECK(for correct namespaces support,lyx_cv_cxx_namespace,
+ [AC_TRY_COMPILE([
+ namespace foo {
+ int bar;
+ }
+ ],[
foo::bar = 0;
return 0;
-],lyx_cv_cxx_namespace=yes,lyx_cv_cxx_namespace=no)
+ ],lyx_cv_cxx_namespace=yes,lyx_cv_cxx_namespace=no)
+ ])
+ if test x$lyx_cv_cxx_namespace = xyes ; then
+ AC_DEFINE(CXX_WORKING_NAMESPACES, 1,
+ [Define if your C++ compiler has correct support for namespaces])
+ fi
])
-if test $lyx_cv_cxx_namespace = yes ; then
- AC_DEFINE(CXX_WORKING_NAMESPACES, 1,
- [Define if your C++ compiler has correct support for namespaces])
-fi])
dnl Usage: LYX_CXX_CHEADERS : checks whether the C++ compiler
projects / features.git / blobdiff