07-16-2016
awk works in a way that all pattern {action} pairs are being executed on the actual line until exhausted or otherwise terminated. Then the next line is read and the execution is repeated. So the sequence of operations doesn't matter as long as you don't want to influence the flow within a line. That's why the position of the time check is irrelevant. In awk, string concatenation is done by just listing the strings like str1 str2 str3, so TMP = TMP DL $0 assigns to TMP the old value of TMP plus DL plus the actual line. On the first occurrence, TMP and DL are empty strings, so the string starts with $0 only.
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LEARN ABOUT LINUX
shtool-arx
SHTOOL-ARX.TMP(1) GNU Portable Shell Tool SHTOOL-ARX.TMP(1)
NAME
shtool-arx - GNU shtool ar(1) extensional command
SYNOPSIS
shtool arx [-t|--trace] [-C|--command cmd] op archive file [file ...]
DESCRIPTION
shtool arx is a wrapper around the archiving tool ar(1). It provides the ability to create archives out of existing archives, i.e., if one
of file matches ""*.a"", the archive member files of file are used instead of file itself.
The trick of this command is the automatic handling of archive members which is especially interesting if one wants to construct a (usually
top-level) library archive out of pre-built sub-library archives (usually staying inside subdirs) in a large source tree. For GNU libtool
based projects, a similar functionality is provided by GNU libtool internally, too.
OPTIONS
The following command line options are available.
-t, --trace
Shows the actually involved shell commands.
-C, --command cmd
Set the used ar(1) command to cmd instead of just "ar" (searched in $PATH).
EXAMPLE
# Makefile
AR=ar
RANLIB=ranlib
:
OBJS=foo.o bar.o
LIBS=baz/libbaz.a quux/libquux.a
:
libfoo.a: $(OBJS) $(LIBS)
shtool arx -C $(AR) rc libfoo.a $(OBJS) $(LIBS)
$(RANLIB) libfoo.a
HISTORY
The GNU shtool arx command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1999 for GNU shtool. It was prompted by
need to build libraries out of sub-libraries inside the OSSP project.
SEE ALSO
shtool(1), ar(1).
18-Jul-2008 shtool 2.0.8 SHTOOL-ARX.TMP(1)