It is not unheard-of for a project to use pch for C++ but not for C
(because C usually builds fast enough anyway, so it's not worth the
developer overhead of maintaining the pch file).
This code was trying to optimize the vcxproj file size by detecting
"only one language", but it was only looking at the number of
pch-languages defined. This is incorrect when pch is not defined for all
languages in use.
Instead of tweaking the optimization further, remove it. This makes the
vs backend behave more like the ninja backend.
A current rather untyped storage of options is one of the things that
contributes to the options code being so complex. This takes a small
step in synching down by storing the compiler options in dicts per
language.
Future work might be replacing the langauge strings with an enum, and
defaultdict with a custom struct, just like `PerMachine` and
`MachineChoice`.
Executables may have an entry point of wmain or wWinMain. These
executables link successfully with ninja. Rather than add more flags to
executable() in meson.build, remove the EntryPointSymbol override. This
makes the vs backend behave more like the ninja backend.
Fixes#6698
This make relative pathes shorter an too give a chance to
de-duplicate -isystem flags just like -I flags.
Fix common test case 203 for OSX build host too
When a source file for a library is changed without adding new extern
symbols, only that library should be rebuilt. Nothing that uses it
should be relinked.
Along the way, also remove trailing `.` in all Ninja rule
descriptions. It's very confusing to see messages like:
```
Linking target mylib.dll.
```
It's confusing that the period at the end of that is not part of the
filename. Instead of removing that period manually in the tests (which
feels wrong!) just don't print it at all.
We actually use this while linking on Windows, and hence we need to
extract symbols from this file, and not the DLL.
However, we cannot pass it instead of the DLL because it's an optional
output of the compiler. It will not be written out at all if there are
no symbols in the DLL, and we cannot know that at configure time. This
means we cannot describe it as an output of any ninja target, or the
input of any ninja target. We must pass it as an argument without
semantic meaning.
This is more correct, and forces the target(s) to be rebuilt if the
PDB files are missing. Increases the minimum required Ninja to 1.7,
which is available in Ubuntu 16.04 under backports.
We can't do the same for import libraries, because it is impossible
for us to know at configure time whether or not an import library will
be generated for a given DLL.
Visual Studio refuses to open projects that present duplicated
items, for example:
<ItemGroup>
<CLInclude Include="glib-enumtypes.h"/>
<CLInclude Include="glib-enumtypes.h"/>
</ItemGroup>
Note that MSBuild handles duplicated items without any issue,
this is useful only for compatibility with the VS IDE.
See pull request mesonbuild#6151
Fixes issue mesonbuild#6147
When a static library link_whole to a bunch of other static libraries,
we have to extract all their objects recursively. But that could
introduce duplicated objects. ar is dumb enough to allow this without
error, but once the resulting static library is linked into an
executable or shared library, the linker will complain about duplicated
symbols.
This is similar to what we currently do for scan-build except there is
no environment variable to choose a specific clang-format to run. If an
environment variable is needed for better control, we can add it later.
Detect scan-build the same way when trying to launch it and when
generating the target.
The detection method is:
1. look within SCANBUILD env variable
2. shutil.which('scan-build')
3. *on non-linux platforms only*: go through all the possible
name candidates and test them individually.
The third step is added following this comment
https://github.com/mesonbuild/meson/pull/5857#issuecomment-528305788
However, going through a list of all the possible candidates is neither
easily maintainable nor performant, and is therefore skipped on
platforms that should not require such a step (currently, only Linux
platforms).
This is a follow-up to the issue raised by @lantw44 during PR:
https://github.com/mesonbuild/meson/pull/5857
GustavoLCR
Michael Brockus
Dylan Baker
Peter Harris
John Ericson
Michael
Daniel Mensinger
Marc-André Lureau
Jesse Natalie
Xavier Claessens
John Ericson
ClausKlein
Jussi Pakkanen
Nirbheek Chauhan
Luca Bacci
Wolfgang Stöggl
Aleksey Gurtovoy
Michael Hirsch, Ph.D
Jakub Adam
Ting-Wei Lan
Gabriel Ganne