gccint: Internal flags

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1 25.5 Internal flags controlling 'lto1'
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1 The following flags are passed into 'lto1' and are not meant to be used
1 directly from the command line.
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1    * -fwpa This option runs the serial part of the link-time optimizer
1      performing the inter-procedural propagation (WPA mode).  The
1      compiler reads in summary information from all inputs and performs
1      an analysis based on summary information only.  It generates object
1      files for subsequent runs of the link-time optimizer where
1      individual object files are optimized using both summary
1      information from the WPA mode and the actual function bodies.  It
1      then drives the LTRANS phase.
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1    * -fltrans This option runs the link-time optimizer in the
1      local-transformation (LTRANS) mode, which reads in output from a
1      previous run of the LTO in WPA mode.  In the LTRANS mode, LTO
1      optimizes an object and produces the final assembly.
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1    * -fltrans-output-list=FILE This option specifies a file to which the
1      names of LTRANS output files are written.  This option is only
1      meaningful in conjunction with '-fwpa'.
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1    * -fresolution=FILE This option specifies the linker resolution file.
1      This option is only meaningful in conjunction with '-fwpa' and as
1      option to pass through to the LTO linker plugin.
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