Miscellaneous XCode Questions
Miscellaneous XCode Questions
- Subject: Miscellaneous XCode Questions
- From: Ben Weiss <email@hidden>
- Date: Thu, 11 May 2006 22:28:21 -0700
Porting some code to Mactel, a few questions...
1. My app links to separate static libraries for debug and release
versions, using linker flags -lMyLibrary and -lMyLibrary_d for the
respective targets. This works fine, but when I recompile the
library, the application project doesn't recognize that the libraries
have changed; I have to clean and rebuild the application every time
to make sure it incorporates the changed library. Is there a way to
get this to happen automatically? (In other words, for the
application project to recognize that the library is changed, and
force a re-link on build?)
2. The CodeWarrior editor allows you to command-drag 2D blocks of
text, then copy and paste over similar blocks. XCode's editor can
also select 2D blocks with option-drag, but pasting over a similar
block doesn't work correctly. (It introduces spurious newlines.) Is
this a bug, and is there a way to make this work in XCode the same
way it works in Codewarrior?
3. When a pointer (to say, a char) is cast to a vUInt16* pointer, gcc
implicitly assumes that it is 16-byte aligned, and loads data with
movdqa. Is it legal for gcc to assume this? Do misaligned loads
always have to be coded explicitly?
4. (more of a Shark question, really...) When I show both Code and
Assembly in a Shark profile for my app, over half the computation
time is shown associated with a single line of code:
54.2% 2105 *buf = _mm_packus_epi16(ppl, ppr); ! LCP
This is clearly a bug (neither the pack nor the store should generate
the LCP warning, for one thing, and this line of code should take a
negligible amount of time); I'll try to isolate it in a test project
and submit a bug report, but perhaps a Shark person may recognize
what's going on?
5. The "Show Assembly Code" option in XCode is nearly useless, since
the code is so cluttered with labels and the like. (In the function
popup menu, I have to scroll through hundreds of labels to find my
function.) Are there any options to view the assembly in a more
simplified format, along the lines of CodeWarrior's disassembler?
Thanks,
Ben
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