<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br>Hi zturner,<div><br></div><div>I understand what you say and I have been suggested this a couple of times, but I really don’t want to make the switch to ninja. I’m a retired senior software developer and I just use LLVM for a custom backend that I have already almost completed in LLVM 7.0. I’m not really into LLVM-project development, and Xcode is both familiar and fast enough for incremental builds of ‘llc’ or ‘clang’ alone including my target backend, (or it used to be in 7.0). It’s just the right tool for me. </div><div><br></div><div>On the other hand I think that in case there’s no intention to fully support Xcode in the future, then it should be removed from de doc descriptions to prevent deceptive information. Otherwise, at least major issues like this one, should be taken care of. </div><div><br></div><div>John</div><div><br></div><div><br><div dir="ltr"><br>On 7 Jul 2019, at 17:08, Zachary Turner <<a href="mailto:zturner@roblox.com">zturner@roblox.com</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div><div dir="auto">Try using ninja generator, most people do not use Xcode for building, so since it lesser-used, it also lesser tested. Note that it’s perfectly possible to use Xcode for code browsing, debugging, editing while using ninja for building, which is what I think most people do</div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 7, 2019 at 4:20 AM Joan Lluch via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">I also filled a bug report. I think this is actually a bug<div><br></div><div><a href="https://bugs.llvm.org/show_bug.cgi?id=42528" target="_blank">https://bugs.llvm.org/show_bug.cgi?id=42528</a></div><div><br></div><div>John</div></div><div style="word-wrap:break-word"><div><br></div><div><br></div><div><blockquote type="cite"><div>On 7 Jul 2019, at 09:27, Joan Lluch via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="m_-2932764727722687519Apple-interchange-newline"><div><div style="word-wrap:break-word"><div>I understand that a difference between ninja and xcode is they use a different way to determine code dependencies. So to my understanding xcode needs dependencies to be properly created whereas ninja just doesn’t care. Maybe this is why ninja is able to find what it needs for the compilation to succeed, but not xcode.</div><div><br></div><div>So I have now looked at the CMakeLists.txt files and found that all the missing libraries are defined in files under the ‘clang’ directory. </div><div><br></div><div>The llvm_project clone has the following structure:</div><div><br></div><div>llvm-project</div><div><span class="m_-2932764727722687519Apple-tab-span" style="white-space:pre-wrap"> </span>llvm</div><div><span class="m_-2932764727722687519Apple-tab-span" style="white-space:pre-wrap"> </span>clang</div><div><span class="m_-2932764727722687519Apple-tab-span" style="white-space:pre-wrap"> </span>(others)</div><div><br></div><div>Everything under ‘llvm’ is properly compiled with no issues, however what is under ‘clang’ fails to compile (with linker errors) even if -DLLVM_ENABLE_PROJECTS=“clang” is specified.</div><div><br></div><div>I suspect now that there may be some kind of bug in the llvm project that prevents this to work properly, or maybe something else needs to be done to get clang compiled on xcode. I also suspect that this may pass unnoticed when using ninja because it simply uses it’s own way to find dependencies (but I don’t really know anything about ninja). </div><div><br></div><div>Maybe this may help somebody to figure out what could be happening and hopefully help me to narrow the issue? I honestly am totally lost on what to try next. This is kind of ridiculous.</div><div><br></div><div>Thanks</div><div><br></div><br><div><blockquote type="cite"><div>On 6 Jul 2019, at 23:49, Neil Nelson <<a href="mailto:nnelson@infowest.com" target="_blank">nnelson@infowest.com</a>> wrote:</div><br class="m_-2932764727722687519Apple-interchange-newline"><div>
<div bgcolor="#FFFFFF" text="#000000"><p><font size="-1">Joan,</font></p><p><font size="-1">Just completed a good clang compile built from a
mostly vanilla Xubuntu 19.04 VM, installed the llvm-needed
Ubuntu packages, downloaded a new copy of llvm using the noted
llvm install page, configured using</font></p><p><font size="-1">cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang"
-DLLVM_USE_LINKER=lld -DCMAKE_BUILD_TYPE="Release"
-DCMAKE_INSTALL_PREFIX=/home/nnelson/Documents/llvm/install
../llvm &> cmake.log</font></p><p><font size="-1">which is primarily different from yours where I
am using a 'Release' build to avoid the much larger memory and
disk usage of a 'Debug' build. The 'ninja install' command put
everything in </font><font size="-1"><font size="-1">llvm/install
as expected including clang. I look through </font></font><font size="-1"><font size="-1"><font size="-1">cmake.log to see if
there are errors that need to be corrected.<br>
</font></font></font></p><p><font size="-1">My differences appear to be Xubuntu, the
packages, ninja, and the cmake line.</font></p><p><font size="-1">On Linux I can use</font></p><p><font size="-1">ninja &> ninja_compile.log</font></p><p><font size="-1">to look at the compile history and see if
something went wrong.</font></p><p><font size="-1">Neil<br>
</font></p>
<div class="m_-2932764727722687519moz-cite-prefix"><font size="-1">On 7/6/19 12:00 AM,
Joan Lluch wrote:<br>
</font></div>
<blockquote type="cite">
<div><font size="-1">Hi Nelson,</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Thanks for your reply. </font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">The “build/Debug/lib” and
"build/Release/lib” directories is where all the libraries go.
Similarly, the executables go to “build/Debug/bin” and
“build/Release/bin” before they are moved to the install
directory. This is expected and normal. However, the problem
is that a small number of libraries (exactly 20 in total) are
not created at all for the LLVM 9.0 version that I cloned from
gitHub. These libraries are in fact not created anywhere!.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">I still have LLVM 7.0 installed in
my computer and the libraries for that version are all there
in the right places under the LLMV 7.0 directory, but in that
case I installed it all in a different way as I said, loosing
the benefits of git.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">I forgot to mention that “llc” alone
compiles and links correctly without any issue. The problem is
only when I try to get ‘clang’ compiled.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">You mention that you enabled a lot
of projects:
"clang;clang-tools-extra;compiler-rt;debuginfo-tests;libclc;libcxx;libcxxabi;libunwind;lld;lldb;llvm;openmp;parallel-libs;polly;pstl”.
I only really need the basic installation of “clang”, and I do
not need any testing tools because all I want is to add my
custom target to it. I also tried "clang;libclc;libcxx” but
the problem with the missing libraries is exactly the same.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Just as a matter of information: I
successfully implemented a custom target backend, and have it
almost finished and running perfectly on LLVM 7.0. Now, I just
want to move it to LLVM 9.0, but got stuck in what is supposed
to be the easiest part which is just compiling it (??), but I
do not understand why it doesn’t compile!</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Any ideas?</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Joan</font></div>
<div><br>
</div>
<blockquote type="cite">
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">John, I compiled and installed to
/usr/local all the projects under llvm except llgo
yesterday. The three files you noted are in</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">../llvm-project/build/lib<br>
</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">I do not have a llvm-project/build/Debug
directory.</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">Xubuntu 19.04. llvm downloaded from
github on 6/18 using instructions from the page you note.</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">cmake -G Ninja
-DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt;debuginfo-tests;libclc;libcxx;libcxxabi;libunwind;lld;lldb;llvm;openmp;parallel-libs;polly;pstl"
-DLLVM_USE_LINKER=lld -DCMAKE_BUILD_TYPE="Release" ../llvm</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">Installed additional packages as needed.<br>
</font></div>
<div style="margin-top:0px;margin-bottom:0px"><font size="-1">Neil<br>
</font></div>
<div class="m_-2932764727722687519moz-cite-prefix"><font size="-1">On 7/5/19
6:46 AM, Joan Lluch via llvm-dev wrote:<br>
</font></div>
<blockquote type="cite">
<div dir="auto" style="word-wrap:break-word"><font size="-1">Hi All,</font>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">I am looking for the
best way to install LLVM+clang, but I do not seem to
find a way that works for me.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">I followed the steps
in this document <a href="https://llvm.org/docs/GettingStarted.html" target="_blank">Getting Started with
the LLVM System — LLVM 9 documentation</a> except that
I created the following folder structure as I do not
want clang and llc to go to /usr/local</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">LLVM-9</font></div>
<div><font size="-1"> llvm-project
(cloned from github)</font></div>
<div><font size="-1"> install</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">I ran the following
command line from the build directory in llvm-project as
described in the doc, but added the
DLLVM_OPTIMIZED_TABLEGEN=On variable :</font></div>
<div><font size="-1"><br>
</font></div>
<div>
<div style="margin:0px;font-size:10px;line-height:normal;font-family:Monaco;background-color:rgb(255,255,255)"><font size="-1"><span style="font-variant-ligatures:no-common-ligatures">cmake
-G Xcode -DLLVM_ENABLE_PROJECTS=clang
-DCMAKE_INSTALL_PREFIX=/Users/joan/LLVM-9/install
-DLLVM_OPTIMIZED_TABLEGEN=On ../llvm</span></font></div>
</div>
<div style="margin:0px;font-size:10px;line-height:normal;font-family:Monaco;background-color:rgb(255,255,255)"><font size="-1"><br>
</font></div>
<div style="margin:0px;line-height:normal;background-color:rgb(255,255,255)"><font size="-1">The cmake command above seems to work ok, but
after that, when I compile the “install” or “build_all”
schemes I get a lot of linker errors. Such as these ones
and more:</font></div>
<div style="margin:0px;line-height:normal;background-color:rgb(255,255,255)"><font size="-1"><br>
</font></div>
<div style="margin:0px;line-height:normal;background-color:rgb(255,255,255)">
<div style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo"><font size="-1">clang:
error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangAST.a'</font></div>
<div style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo"><font size="-1">clang:
error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangLex.a'</font></div>
<div style="margin:0px 0px 0px 12px;font-size:11px;line-height:normal;font-family:Menlo"><font size="-1">clang:
error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangBasic.a'</font></div>
</div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Up until recently, I
have worked with LLVM 7.0 and all what I did was
downloading both llvm and clang from <a href="http://llvm.org/" target="_blank">llvm.org</a>,
copied clang into llvm/tools, and ran the cmake
application (not command line). That kind of worked
except for some minor glitches but of course I didn’t
get the benefits of git.</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">So what am I doing
wrong now? Why I’m getting such linker errors?</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">It seems that a few
required libraries are not created, but I do not
understand why. Any ideas?</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">Thanks,</font></div>
<div><font size="-1"><br>
</font></div>
<div><font size="-1">John</font></div>
</div>
</blockquote>
</blockquote>
<div>
<div dir="auto" style="word-wrap:break-word">
<div><font size="-1"><br>
</font></div>
</div>
</div>
</blockquote>
</div>
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