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51 lines
1.7 KiB
Plaintext
51 lines
1.7 KiB
Plaintext
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----------------------------------------------------------
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Notes on how to update libm based on Intel's libm releases
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----------------------------------------------------------
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This source code in this directory is currently based on Intel libm
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v2.1 as available from:
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http://www.intel.com/software/products/opensource/libraries/num.htm
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To ease importing, fix some bugs, and simplify integration into libc,
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it is also necessary to apply the patch at:
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ftp://ftp.hpl.hp.com/pub/linux-ia64/intel-libm-041228.diff.gz
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The expectation is that Intel will integrate most if not all of these
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changes into future releases of libm, so this patching step can
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hopefully be omitted in the future.
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Once the patched libm sources are extracted in a directory $LIBM, they
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can be imported into the libc source tree at $LIBC with the following
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step:
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$ cd $LIBC/src/sysdep/ia64/fpu
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$ ./import_intel_libm $LIBM
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This should produce a number of "Importing..." messages, without
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showing any errors.
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At this point, you should be able to build glibc in the usual fashion.
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We assume you do this in directory $OBJ. Once the build has
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completed, run "make check" to verify that all (math) checks succeed.
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If these checks succeed, you should also run the following commands to
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verify that the new libm doesn't pollute the name-space and has proper
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size-info for the data objects:
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$ cd $LIBC/src/sysdep/ia64/fpu
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$ import_check $OBJ/math/
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There should be no (unexpected) errors reported by this script.
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As an optional step, you may also want to confirm that the new libm
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exports the exact same global symbols as the old one.
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If you want to see the changes introduced by the "import_intel_libm"
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script, you can run the commands:
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$ cd $LIBC/src/sysdep/ia64/fpu
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$ import_diffs
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That's it.
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