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Estimated hours taken: 0.5 Branches: main Remove the RM_C mmake variable, which controlled whether the intermediate `.c' files were removed (now they never are). The implementation was buggy (it didn't work with parallel makes), and made it difficult to avoid always recompiling the `.c' file with smart recompilation. Mmake.common.in: configure.in: README.AIX: bindist/bindist.build_vars.in: bindist/bindist.configure.in: scripts/Mmake.vars.in: scripts/Mmake.rules: compiler/modules.m: tools/bootcheck: tools/binary_step: */Mmakefile: Remove references to RM_C, DEFAULT_RM_C and LIBRARY_RM_C. compiler/modules.m: The `.o' and `.pic_o' file now depends only on the `.c' file, not on everthing the `.c' file depends on. The extra dependencies were only needed because the intermediate `.c' file could be removed by RM_C. This change is needed to avoid recompiling unchanged `.c' files with smart recompilation.
51 lines
2.0 KiB
Plaintext
51 lines
2.0 KiB
Plaintext
-----------------------------------------------------------------------------
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This file documents what you need to do to get Mercury to work on an
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RS/6000 running AIX using GNU C.
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Previous versions of Mercury have worked successfully on AIX,
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but Rodney Brown <rodneybrown@pmsc.com> reported some problems
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with a recent version. We believe that we have fixed these problems,
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but we do not have a machine running AIX to test it on, so we do
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not know if the current version will build correctly out-of-the-box.
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If there are any problems remaining, we would be happy to assist
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in resolving them.
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-----------------------------------------------------------------------------
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1. Put the following line in the file Mmake.params:
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EXTRA_CFLAGS=-mminimal-toc
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This works around a fixed limit on the size of the TOC (Table of Contents)
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in the RS/6000 object file format.
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2. Follow the instructions in the INSTALL file.
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The last version of Mercury which was known to work on AIX was
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Mercury 0.6 -- actually a version just prior to 0.6, namely
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the 30Apr1996 development snapshot (the sources for this version
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are still available from our CVS repository).
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That version was verified to work on AIX 4.1.3 using GNU C 2.7.2.
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For that version, following the steps above would result in
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an error message from the assembler, so the following additional
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step was needed.
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3. Change directory to the `compiler' directory, and run the command
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sh ../scripts/rs6000_hack
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Then continue following the instructions in the INSTALL file.
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This works around a fixed limit of 32k on the size of relative jumps
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in the RS/6000 object file format.
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It is possible that something similar to this will still be needed,
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but the rs6000_hack script no longer works as is, so a little more
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hacking will be needed if that is the case.
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(We'd be happy to offer assistance with this task. Indeed, we'd do it
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ourselves, but we don't have an AIX machine -- donations happily accepted ;-)
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-----------------------------------------------------------------------------
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