On May 10, 2008, at 11:57 PM, Glynn Clements wrote:
The dSYM file extension on the output file is the critical bit. If
the
output file ends with a dSYM file extension, only supporting data is
generated. No executable. (see example below). I worked around the
problem by deleting references to ${ac_exeext}. What's the right fix
for the configure script? Apparently there is a supporting script to
autoconf which needs to be updated, right?
It's autoconf's AC_EXEEXT macro which is the problem. It attempts to
determine the executable suffix automatically, with the following
code:
Essentially, it deletes conftest.*, compiles and links a test program
named "conftest", then searches for any files matching conftest.*
whose extension isn't recognised as an intermediate file. If any such
file exists, it is assumed to be the executable, and its suffix is
treated as the executable suffix.
Clearly this fails if linking produces any unexpected files, such as
conftest.dSYM (which presumably contains debug symbols).
We should probably eliminate the use of that macro in favour of a
simple "if cygwin or mingw then .exe else nothing" test. I don't know
of any other supported platform where executables have a suffix.
Ah, yes, I see. Even though the .dSYM bundle is created when debug
sysmbols are ON, there is also a normal executable without an
extension. But AC_EXEEXT sees the bundle first (and ignores that it
is a directory) and assumes that's the executable.
Note that with the correct extention (ie none), run tests will still
produce that .dSYM bundle. It seems to only happen when the compile
and link steps are one, and not when object files are compiled, then
linked in a separate step (so GRASS compilation won't be so messy).
It's also only for the default OSX debug format, DWARF.
-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/
"Mon Dieu! but they are all alike. Cheating, murdering, lying,
fighting, and all for things that the beasts of the jungle would not
deign to possess - money to purchase the effeminate pleasures of
weaklings. And yet withal bound down by silly customs that make them
slaves to their unhappy lot while firm in the belief that they be the
lords of creation enjoying the only real pleasures of existence....
- the wisdom of Tarzan
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