AC_SUBST(lyx_devel_version)
])
-dnl If LyX is compiled from a git clone, find the HEAD commit hash
-dnl
-dnl
-AC_DEFUN([LYX_CHECK_GIT_COMMIT], [
-AC_MSG_CHECKING([for git commit hash])
-lyxgitcommit=`cd "$srcdir" && git log -1 --pretty=format:%H 2>/dev/null || true`
-test x$lyxgitcommit = x && lyxgitcommit="none"
-AC_MSG_RESULT($lyxgitcommit)
-])
-
dnl Define the option to set a LyX version on installed executables and directories
dnl
])
+dnl Usage: LYX_PROG_CLANG: set lyx_cv_prog_clang to yes if the compiler is clang.
+AC_DEFUN([LYX_PROG_CLANG],
+[AC_CACHE_CHECK([whether the compiler is clang],
+ [lyx_cv_prog_clang],
+[AC_TRY_COMPILE([], [
+#ifndef __clang__
+ this is not clang
+#endif
+],
+[lyx_cv_prog_clang=yes ; CLANG=yes], [lyx_cv_prog_clang=no ; CLANG=no])])
+])
+
+
+dnl Usage: LYX_LIB_STDCXX: set lyx_cv_lib_stdcxx to yes if the STL library is libstdc++.
+AC_DEFUN([LYX_LIB_STDCXX],
+[AC_CACHE_CHECK([whether STL is libstdc++],
+ [lyx_cv_lib_stdcxx],
+[AC_TRY_COMPILE([#include<vector>], [
+#if ! defined(__GLIBCXX__) && ! defined(__GLIBCPP__)
+ this is not libstdc++
+#endif
+],
+[lyx_cv_lib_stdcxx=yes], [lyx_cv_lib_stdcxx=no])])
+])
+
+
AC_DEFUN([LYX_PROG_CXX],
[AC_MSG_CHECKING([for a good enough C++ compiler])
LYX_SEARCH_PROG(CXX, $CXX $CCC g++ gcc c++ CC cxx xlC cc++, [LYX_PROG_CXX_WORKS])
fi
AC_MSG_RESULT($CXX)
-AC_PROG_CXX
-AC_PROG_CXXCPP
+AC_REQUIRE([AC_PROG_CXX])
+AC_REQUIRE([AC_PROG_CXXCPP])
+AC_LANG_PUSH(C++)
+LYX_PROG_CLANG
+LYX_LIB_STDCXX
+AC_LANG_POP(C++)
+
+if test $lyx_cv_lib_stdcxx = "yes" ; then
+ AC_DEFINE(STD_STRING_USES_COW, 1, [std::string uses copy-on-write])
+else
+ if test $lyx_cv_prog_clang = "yes" ; then
+ AC_DEFINE(USE_LLVM_LIBCPP, 1, [use libc++ provided by llvm instead of GNU libstdc++])
+ fi
+fi
### We might want to get or shut warnings.
AC_ARG_ENABLE(warnings,
# set the compiler options correctly.
if test x$GXX = xyes; then
- dnl Useful for global version info
- gxx_version=`${CXX} -dumpversion`
- CXX_VERSION="($gxx_version)"
+ dnl clang++ pretends to be g++ 4.2.1; this is not useful
+ if test x$CLANG = xno; then
+ dnl Useful for global version info
+ gxx_version=`${CXX} -dumpversion`
+ CXX_VERSION="($gxx_version)"
+ fi
if test "$ac_test_CXXFLAGS" = set; then
CXXFLAGS="$ac_save_CXXFLAGS"
*) AM_CXXFLAGS="";;
esac
if test x$enable_stdlib_debug = xyes ; then
+ dnl FIXME: for clang/libc++, one should define _LIBCPP_DEBUG2=0
+ dnl See http://clang-developers.42468.n3.nabble.com/libc-debug-mode-td3336742.html
case $gxx_version in
3.4*|4.*)
lyx_flags="$lyx_flags stdlib-debug"
case $gxx_version in
3.3*)
lyx_flags="$lyx_flags concept-checks"
+ dnl FIXME check whether this makes sense with clang/libc++
AC_DEFINE(_GLIBCPP_CONCEPT_CHECKS, 1, [libstdc++ concept checking])
;;
3.4*|4.*)
esac
fi
if test x$enable_cxx11 = xyes ; then
+ dnl FIXME: check what to do with clang (is anything needed at all?)
case $gxx_version in
4.3*|4.4*|4.5*|4.6*)
lyx_flags="$lyx_flags c++11-mode"
])
+dnl Usage: LYX_CHECK_CALLSTACK_PRINTING: define LYX_CALLSTACK_PRINTING if the
+dnl necessary APIs are available to print callstacks.
+AC_DEFUN([LYX_CHECK_CALLSTACK_PRINTING],
+[AC_CACHE_CHECK([whether printing callstack is possible],
+ [lyx_cv_callstack_printing],
+[AC_TRY_COMPILE([
+#include <execinfo.h>
+#include <cxxabi.h>
+], [
+ void* array[200];
+ size_t size = backtrace(array, 200);
+ backtrace_symbols(array, size);
+ int status = 0;
+ abi::__cxa_demangle("abcd", 0, 0, &status);
+],
+[lyx_cv_callstack_printing=yes], [lyx_cv_callstack_printing=no])])
+if test x"$lyx_cv_callstack_printing" = xyes; then
+ AC_DEFINE([LYX_CALLSTACK_PRINTING], 1,
+ [Define if callstack can be printed])
+fi
+])
+
+
dnl Usage: LYX_USE_INCLUDED_MYTHES : select if the included MyThes should
dnl be used.
AC_DEFUN([LYX_USE_INCLUDED_MYTHES],[