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(Automatic Dependencies): Improve recommended sed command.

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Mention -MM flag to gcc.
This commit is contained in:
Roland McGrath 1994-10-24 05:05:43 +00:00
parent a543a2ae9f
commit dc576b2051
1 changed files with 8 additions and 2 deletions
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10
make.texinfo
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@ -10,7 +10,7 @@
@set RCSID $Id$ @set RCSID $Id$
@set EDITION 0.47 DRAFT @set EDITION 0.47 DRAFT
@set VERSION 3.72 Beta @set VERSION 3.72 Beta
@set UPDATED 16 October 1994 @set UPDATED 24 October 1994
@set UPDATE-MONTH October 1994 @set UPDATE-MONTH October 1994
@set ISBN 1-882114-50-7 @set ISBN 1-882114-50-7
@ -2583,7 +2583,7 @@ called @file{@var{name}.d} from a C source file called @file{@var{name}.c}:
@group @group
%.d: %.c %.d: %.c
$(SHELL) -ec '$(CC) -M $(CPPFLAGS) $< \ $(SHELL) -ec '$(CC) -M $(CPPFLAGS) $< \
| sed '\''s/$*.o/& $@@/g'\'' > $@@' | sed '\''s/$*\\.o[ :]*/& $@@/g'\'' > $@@'
@end group @end group
@end example @end example
@ -2596,6 +2596,12 @@ shell exits with the status of the last command in the pipeline
status from the compiler. status from the compiler.
@cindex @code{-e} (shell flag) @cindex @code{-e} (shell flag)
@cindex @code{-MM} (to GNU compiler)
With the GNU C compiler, you may wish to use the @samp{-MM} flag instead
of @samp{-M}. This omits dependencies on system header files.
@xref{Preprocessor Options, , Options Controlling the Preprocessor,
gcc.info, Using GNU CC}, for details.
@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):