I’m having an issue generating and using a XCode project using cmake -G.
cmake —version
cmake version 3.4.1
Xcode Version 7.2 (7C68)
Mac OS 10.11.
My CMakeLists.txt has a clang option that fails during the -G Xcode pass but
fails when linking within XCode.
The compiler / linker option is ‘-Wl,—as-needed’
The test compile/link step in ‘cmake -G Xcode' creates a long clang command
with arguments ‘-Wl,—as-needed’ plus ‘—serialize-diagnostics <path to .dia
file>’
The link step within Xcode after the project created has the ‘-Wl,—as-needed’
argument and does not have the ‘—serialize-diagnostics <path to .dia file>’
argument. The link fails because ‘-Wl,—as-needed’ isn’t supported.
If copy and execute the long clang command from the ‘cmake -G Xcode’ command
and remove the ‘—serialize-diagnostics <path to .dia file>’ then it
successfully fails with ‘-Wl, —as-needed’ isn’t supported.
Finally, when I use cmake to generate unix makefiles it works meaning cmake
determines ‘-Wl—as-needed’ isn’t supported and doesn’t add it to the argument
list.
Questions:
- Where is the ‘—serialized-diagnostics’ argument coming from when executing
‘cmake -G Xcode’?
- What is a .dia file and how do I read it?
- What’s the preferred / recommended way of detecting the non-supported
‘-Wl,—as-needed’ argument during the ‘cmake -G Xcode’ phase? One option might
to be to remove the ‘—serialize-diagnostics’ argument during the generation
phase.
I can provide more details on request.
David
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