Introduce new configure option --enable-cxx-mode=MODE, which allows to
force a C++ version. The default is {14,11}, which means that C++14 is
chosen if it is supported, and C++11 will be selected as a fallback.
Using --enable-cxx-mode=11 ensures that LyX compiles correctly
with an older C++11 compiler.
This is better than depending on compiler version. In particular,
Apple clang versions do not match regular clang versions.
Note that -Wno-deprecated-copy will always be used with g++, since
this compiler allows to suppress warnings it does not know about
(-Wno-zorg is valid, even though -Wzorg triggers an error).
This was already done for gcc9 and saves tons of warnings.
Note that the warning in Qt are gone with Qt5.13, so eventually we
will have to get rid of our own copy issues.
Recent gcc versions return a short version with -dumpversion, e.g. 9.
In this case, use -dumpfullversion, which gives something like 9.1.0.
This makes the gcc 9 detection work properly.
The warning about unneeded std::move can be solved by conditioning on
C++14 mode.
The warnings about deprecated copy is harder, so we disable it for
now. We will be able to fix our part, but Qt triggers it a lot too.
When callback printing is enabled, link lyx with -rdynamic, so that
stacks have LyX symbols available.
Add option --disable-callstack-printing to configure.
Running "size" on binary:
* with callstack printing support
text data bss dec hex filename
20891684 34680 107796 21034160 140f4b0 src/lyx
* without callstack printing support
text data bss dec hex filename
17953640 34648 107796 18096084 1141fd4 src/lyx
Until now, building with Qt5 required using --enable-qt5.
This is no more necessary. To build with Qt4 one should now
use --disable-qt5 or, equivalently, --enable-qt5=no.
A function that returns a vector<string> will lead to a crash if the
main code and the library have not been compiled with the same
stdlib-debug state. See for example:
https://stackoverflow.com/questions/4764048/stl-and-release-debug-library-mess
This is fixed by introducing a new variable STDLIB_DEBUG that contains
the flags that trigger the debug mode (autoconf only for now).
This will allow to go forward with bug #10547.
Traditionally LyX behaves differently when the directive DEVEL_VERSION
is defined at compile time. This covers
* more detailed description of current position in status bar
* the help files are open in read/write mode
* more detailed debug output in the View Source panel
This patch introduces the new function devel-mode-toggle that allows
to use devel mode in stable releases, and vice versa.
The information is saved in the session file. The default is to
disable devel mode.
Remove all traces of DEVEL_VERSION in autoconf and cmake
Now configure searches in this order
1. system-installed library
2. code bundled with LyX
If --with-included-mythes or if no mythes library is installed, then
the script selects the bundled version. There should be no cases
leading to error message.
Use the bundled mythes by default again, since the current situaiton
create an error for anybody who does not have the system one
installed.
This is a stop gap measure and I'll return to it later (in a hurry now).
The configure code suggests that the default for
--with-included-(iconv|zlib|hunspell) is "yes", which is wrong: by
default is indeed to use the system libraries.
Change the MyThes detection to use the system version by default.
Also add to the verison information a line which lists the bundled libraries.
The test is stolen from cmake code.
Tested on:
* ubuntu 12.04 with g++ 4.6, clang 3.3 (with libstdc++)
* ubuntu 16.04 with g++ 5.3, clang 3.7 (with libstdc++) and clang 3.7
(with libc++)
The last combination fails, but it seems to be related to real bugs
(reported for debian), so this is OK.
The test file is stolen from cmake. The options tested are, from the
most desirable to the least desirable:
-std=c++14 -std=c++11 "" -std=c++0x -std=gnu++14 -std=gnu++11 -std=gnu++0x
It is expected that the result will not be correct for cygwin, but
this is fixable.
The version is read by checking the macros __clang_major__,
__clang_minor__ and __clang_patchlevel__. Hopefully they will have
coherent values everywhere.
For now, the version is used to set warnings a bit more reasonably for
older clang versions, which do not support -Wdeprecated-register and
some others that are used in pragmas in boost.
This removes many warnings when compiling with clang 3.3.
We only link against boost libraries if we do not use std::regex.
Therefore, we do not need to test how to link against boost libs unconditionally.
Also, the warning regarding stdlib-debug is only needed if we link against boost.
Boost.Signals is deprecated. This fixes bug #9943.
The only thing left to do is to rewrite (or get rid of) the boost -mt test
in config/lyxinclude.m4 not to use signals anymore.
As discussed on the list. If no C++11 compiler is found configuration stops
with an error. There are now unneeded parts of boost, the will be removed in
a second commit.
The standard host triplet for mingw tools is is something like
x86_64-w64-mingw32 on debian and something like x86-64-w64-mingw32.shared for
mxe (http://mxe.cc). Detect windows packaging correctly for these build types.
The included iconv should not be used on Linux or OS X, but (depending on
local configuration) it might be needed for crosscompiling a mingw target
from Linux. Now the user can choose whether to use the included iconv or not.
cmake does already support that.
eilseq.m4 was taken from the original libiconv 1.14 package.
See bug 10053 for details. Without this, the package is only set correctly
for 32bit mingw.
Thanks Enrico for suggesting this fix and Shankar Giri Venkita Giri for
testing it.
The included zlib should not be used on Linux or OS X, but (depending on
local configuration) it might be needed for crosscompiling a mingw target
from Linux. Now the user can choose whether to use the included zlib or not.
cmake does already support that.
zconf.h.in was taken from the original zlib 1.2.8 package. The generation of
zconf.h was made equivalent to the one generated by cmake.
Since at least gcc 4.6 requires it, -std=c++11 has been passed to CPPFLAGS at 39717adfd. This was deemed necessary so that tests that use the preprocessor directly (AC_CHECK_HEADER) can have the right information.
It turns out that CPPFLAGS gets passed to objc compilation too (on Mac OS X) and this create compile-time errors.
Therefore we remove the -std flag from CPPFLAGS and re-add it to a separate variable cxx11_flags that is passed to LYX_CXX_USE_REGEX.
This amends commit e1938aa2, which introduced some logic
errors: regex would be enabled for gcc versions which have unusable
<regex> header.
The new code separates better special gcc handling from special C++11
handling and should be more readable.
* set -std=c++11 in AM_CPPFLAGS instead of AM_CXXFLAGS, since the
preprocessor uses this setting too.
* Before checking for header <regex>, set language to C++ and update
value of AM_CPPFLAGS too.
* Separate code that checks for regex in its own macro.
* now unknown compiler which have the <regex> header, will use std::regex in C++11 mode.
