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