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Diffstat (limited to 'sysdeps/ia64/fpu/README')
| -rw-r--r-- | sysdeps/ia64/fpu/README | 50 |
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diff --git a/sysdeps/ia64/fpu/README b/sysdeps/ia64/fpu/README new file mode 100644 index 0000000000..6f4af0678a --- /dev/null +++ b/sysdeps/ia64/fpu/README @@ -0,0 +1,50 @@ + ---------------------------------------------------------- + Notes on how to update libm based on Intel's libm releases + ---------------------------------------------------------- + +This source code in this directory is currently based on Intel libm +v2.1 as available from: + + http://www.intel.com/software/products/opensource/libraries/num.htm + +To ease importing, fix some bugs, and simplify integration into libc, +it is also necessary to apply the patch at: + + ftp://ftp.hpl.hp.com/pub/linux-ia64/intel-libm-041228.diff.gz + +The expectation is that Intel will integrate most if not all of these +changes into future releases of libm, so this patching step can +hopefully be omitted in the future. + +Once the patched libm sources are extracted in a directory $LIBM, they +can be imported into the libc source tree at $LIBC with the following +step: + + $ cd $LIBC/src/sysdep/ia64/fpu + $ ./import_intel_libm $LIBM + +This should produce a number of "Importing..." messages, without +showing any errors. + +At this point, you should be able to build glibc in the usual fashion. +We assume you do this in directory $OBJ. Once the build has +completed, run "make check" to verify that all (math) checks succeed. +If these checks succeed, you should also run the following commands to +verify that the new libm doesn't pollute the name-space and has proper +size-info for the data objects: + + $ cd $LIBC/src/sysdep/ia64/fpu + $ import_check $OBJ/math/ + +There should be no (unexpected) errors reported by this script. + +As an optional step, you may also want to confirm that the new libm +exports the exact same global symbols as the old one. + +If you want to see the changes introduced by the "import_intel_libm" +script, you can run the commands: + + $ cd $LIBC/src/sysdep/ia64/fpu + $ import_diffs + +That's it. |