Cygwin List O' Issues...

[Charles Wilson]

This is the first of four messages. There are three significant issues with regards to libtool support on cygwin, even after tonight's inclusion of the patches I submitted. I will describe these problems briefly here, and then start three new subthreads that more completely describe the problems -- complete with examples!

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1. C++ (actually, all tags except C) is broken. This is because the non-C tags extract the list of runtime stdlibs from the compiler, and then explicitly add them to the link command (while using -nostdlibs). This has the effect of requiring that the runtime libs satisfy the "is it dynamic?" check in $file_magic_cmd.

Since the cygwin gcc/g++/g77 compiler suite provides only static versions of libgcc, libstdc++, libsupc++, libg2c, etc, this means that ALL shared libs written in those languages fail to build. (Strangely, the C tag does NOT behave this way. Inconsistency...) But the lack of a shared version of the runtime libs should NOT preclude building DLLs on windows -- and in fact, it probably shouldn't preclude them on Linux or Solaris, either (shared libs containing non-PIC runtime code just runs a little slower, that's all).

This bug can also affect other platforms (but most platforms' compiler suite supply shared versions of the runtime libs, so the behavior is not as visible).

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2. 'make install DESTDIR=' fails (or relinks to an old version of a dependent lib) when the project contains dependent libraries.

This bug affects all platforms.

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3. relinking .exe's. Over and over and over and over. This doesn't really cause project builds to FAIL, but it is HIGHLY annoying -- and has the possibility of an infinite dependency loop.

This bug is win32-platform (cygwin, mingw, pw, ...) specific.
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Unfortunately, I really have no idea how to fix these problems -- but I thought I'd bring them up here, just in case somebody else had a bright idea. And I'd *really* like to see them corrected before 1.5 is released. :-)

Three more messages follow, one for each of the three problems. Please reply to those messages, not this one.

Thanks,
Chuck



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