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94 lines
3.2 KiB
Text
94 lines
3.2 KiB
Text
-*- mode: Outline -*-
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This is version 0.92 of the unwind library. At the moment, only the
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IA-64 Linux (IPF Linux) platform is fully supported. Some very basic
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support for x86 exists also. However, the x86 support is based purely
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on the frame-chain and does not use unwind information, so its utility
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is limited.
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* General Build Instructions
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In general, this library can be built and installed with the following
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commands:
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$ ./configure
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$ make
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$ make install prefix=PREFIX
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where PREFIX is the installation prefix. By default, a prefix of
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/usr/local is used, such that libunwind.a is installed in
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/usr/local/lib and unwind.h is installed in /usr/local/include. For
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testing, you may want to use a prefix of /usr/local instead.
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If, during the build, you're getting an error of the form:
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../src/.libs/libunwind-ia64.so: undefined reference to `__tls_get_addr'
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it indicates that you have a compiler which supports the `__thread'
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keyword, but a runtime system (C library), which does not. As of
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September 2003, this appears to be a common problem for Debian
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"unstable" systems. To work around this issue, run "./configure" with
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option "--disable-__thread".
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* Building with Intel ECC
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To build libunwind with the Intel Electron compiler (ECC), it is
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recommended to run configure like this:
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$ ./configure CC=ecc CXX=ecc CCAS=gcc
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The reason for this is that ECC uses the Intel assembler, which
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doesn't grok some of the IA-64 assembly code in the "tests" directory.
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For an ECC-built version of libunwind to work properly, you also need
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to ensure that /usr/include/asm/fpu.h contains a "long double" member
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called "__dummy" in the declaration of "struct ia64_fpreg". Without
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that member, variables of type unw_context_t won't be aligned
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properly.
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* Building on HP-UX
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For the time being, libunwind must be built with GCC on HP-UX.
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Unfortunately, gcc-3.0 ships with a bad version of sys/types.h.
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The workaround for this is:
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$ mkdir $top_dir/include/sys
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$ cp /usr/include/sys/types.h $top_dir/include/sys
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* Regression Testing
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After building the library, you can run a set of regression tests with:
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$ make check
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Unless you have a very recent C library and compiler installed, it is
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currently expected to have the following tests fail:
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Gtest-init (should pass starting with glibc-2.3.x/gcc-3.4)
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Ltest-init (should pass starting with glibc-2.3.x/gcc-3.4)
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test-ptrace (should pass starting with glibc-2.3.x/gcc-3.4)
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run-ia64-test-dyn1 (should pass starting with glibc-2.3.x)
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This does not mean that libunwind cannot be used with older compilers
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or C libraries, it just means that for certain corner cases, unwinding
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will fail. Since they're corner cases, it is not likely for
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applications to trigger them.
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* Contacting the Developers
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Please direct all questions regarding this library to:
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libunwind@linux.hpl.hp.com
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For spam protection, you'll have to subscribe to this list before
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posting a question. You can do this by sending a mail to
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libunwind-request@linux.hpl.hp.com with a body of:
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subscribe libunwind
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Note: the host that is running this list is behind a firewall, so
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you'll not be able to use the Web interface to manage your
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subscription. Send a mail containing "help" to
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libunwind-request@linux.hpl.hp.com for information on how to manage
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your subscription via email.
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