kc3-lang/gnulib/modules/gen-header

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• Hash : 75541c6a
  Author :
  Date : 2022-01-01T15:30:38
  

  gen-header: port to BusyBox ‘sed’
  
  Problem reported by Tim Rühsen in:
  https://lists.gnu.org/r/bug-gnulib/2022-01/msg00004.html
  * modules/gen-header (SED_HEADER_NOEDIT): Replace instead of prepend.
  (SED_HEADER_STDOUT, SED_HEADER_TO_AT_t): Adjust to that change.
  Do not use ‘w foo’ twice in the same script, as BusyBox ‘sed’
  mistakenly opens ‘foo’ for output twice, thus losing some output.
  

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• modules/gen-header

• Description:
  Generating header files
  
  Applicability:
  all
  
  Files:
  
  Depends-on:
  
  configure.ac:
  
  Makefile.am:
  # In 'sed', replace the pattern space with a "DO NOT EDIT" comment.
  SED_HEADER_NOEDIT = s,.*,/* DO NOT EDIT! GENERATED AUTOMATICALLY! */,
  
  # '$(SED_HEADER_STDOUT) -e "..."' runs 'sed' but first outputs "DO NOT EDIT".
  SED_HEADER_STDOUT = sed -e 1h -e '1$(SED_HEADER_NOEDIT)' -e 1G
  
  # '$(SED_HEADER_TO_AT_t) FILE' copies FILE to $@-t, prepending a leading
  # "DO_NOT_EDIT".  Although this could be done more simply via:
  #	SED_HEADER_TO_AT_t = $(SED_HEADER_STDOUT) > $@-t
  # the -n and 'w' avoid a fork+exec, at least when GNU Make is used.
  SED_HEADER_TO_AT_t = $(SED_HEADER_STDOUT) -n -e 'w $@-t'
  
  # Use $(gl_V_at) instead of $(AM_V_GEN) or $(AM_V_at) on a line that
  # is its recipe's first line if and only if @NMD@ lines are absent.
  @NMD@gl_V_at = $(AM_V_at)
  @!NMD@gl_V_at = $(AM_V_GEN)
  
  Include:
  
  License:
  LGPLv2+
  
  Maintainer:
  bug-gnulib@gnu.org
  

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