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Formerly make.texinfo.~118~

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Roland McGrath 1993-09-06 23:34:51 +00:00
parent 2bf7e9bcda
commit b9337d3143
1 changed files with 11 additions and 4 deletions
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@ -9,8 +9,8 @@
@set EDITION 0.44 @set EDITION 0.44
@set VERSION 3.69 Beta @set VERSION 3.69 Beta
@set UPDATED 19 August 1993 @set UPDATED 6 September 1993
@set UPDATE-MONTH August 1993 @set UPDATE-MONTH September 1993
@c finalout @c finalout
@ -2571,12 +2571,19 @@ called @file{@var{name}.d} from a C source file called @file{@var{name}.c}:
@example @example
@group @group
%.d: %.c %.d: %.c
$(CC) -M $(CPPFLAGS) $< | sed 's/$*.o/& $@@/g' > $@@ $(SHELL) -ec '$(CC) -M $(CPPFLAGS) $< | sed '\''s/$*.o/& $@@/g'\'' > $@@'
@end group @end group
@end example @end example
@noindent @noindent
@xref{Pattern Rules}, for information on defining pattern rules. @xref{Pattern Rules}, for information on defining pattern rules. The
@samp{-e} flag to the shell makes it exit immediately if the
@code{$(CC)} command fails (exits with a nonzero status). Normally the
shell exits with the status of the last command in the pipeline
(@code{sed} in this case), so @code{make} would not notice a nonzero
status from the compiler.
@cindex @code{-e} (shell flag)
@cindex @code{sed} (shell command) @cindex @code{sed} (shell command)
The purpose of the @code{sed} command is to translate (for example): The purpose of the @code{sed} command is to translate (for example):