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#!/bin/sh |
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# |
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# CCDEPS-GCC (C) 2002 Emile van Bergen. Distribution of this file is allowed |
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# under the conditions detailed in the GNU General Public License (GPL). See |
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# the file COPYING for more information. |
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# |
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# This script compiles and/or links one or more source or object files into a |
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# object file or executable target, and outputs all extra dependencies found |
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# while doing so in a file named target.d, which can be used by GNU Make. |
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# |
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# The script should be invoked the same way as your C compiler, that is, |
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# specifying the target using a -o option and the source or object files as |
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# non-option arguments. It will generate dependencies in the form |
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# |
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# target target.d: dir/file1.c dir/file2.c header1.h header2.h |
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# dir/file1.c dir/file2.c header1.h header2.h: |
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# |
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# This version is intended for GCC, which can do compilation and dependency |
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# generation in one step. The name of the GCC version (default gcc) can be |
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# overridden using the CC environment variable. |
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# |
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# CHANGELOG |
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# |
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# 2003/1/8: EvB: adapted for gcc 3.2, still handles 2.95 as well. |
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# |
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# This was necessary because gcc 3.2 handles -MD differently than gcc 2.95: |
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# where the old version generated a .d file for each source, in the current |
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# directory, the new one does almost completely what this script intended to |
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# do: generate one .d file in the same directory and with the same file name |
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# as the target. |
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# |
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# The only fixups 3.2's .d files still need are: |
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# |
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# - changing the file name; gcc 3.2 strips the suffix of the target before |
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# appending the .d, so targets x and x.o will both produce x.d, which is |
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# not what we want; |
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# |
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# - adding the implicit dependencies as prerequisiteless targets, so that |
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# make will just consider the target out of date if one does not exist |
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# anymore; |
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# |
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# - adding the .d file as depending on the same prerequisites as our real |
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# target so that it will be considered out of date if one of the files |
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# mentioned in it are updated or missing. |
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# |
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# Basically, this version does all that by simply including the file |
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# <strippedtarget>.d file in the list of .d files we look for. We may end |
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# up generating the same file name, but that already was handled correctly. |
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# Otherwise we perform the normal routine, so that we /know/ the targets will |
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# be correct, directories and all, regardless of variations in gcc behaviour. |
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|
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cmdline="$*" |
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|
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while [ x"$1" != x ] |
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do |
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case "$1" in |
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-o) tgt="$2" ; shift ;; # target specifier option |
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-x|-u|-b|-V) shift ;; # options with arg after space |
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-*) ;; # standard options |
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*) fil="$fil $1" ;; # source or object files |
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esac |
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shift |
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done |
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|
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CC=gcc |
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|
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# If we're not processing any .c files (link only), run gcc as-is and we're done |
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|
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expr "$fil" : ".*\.c" >/dev/null || exec $CC $cmdline |
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|
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# Otherwise, run the gcc with the -MD option, which generates a .d file |
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# in the current directory for each .c or .cc source file processed. |
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# |
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# These files are post-processed (replacing the incorrectly named target |
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# with the real target specified with -o, and adding the .d file), concatenated |
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# into one .d file that is named based on the target name, and put in the |
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# correct directory. Further, all prerequisites are added as bare targets, |
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# preventing errors when files are missing due to renaming or restructuring |
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# headers, but causing the files dependent on them to be considered out of |
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# date. (GNU Make feature). |
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# |
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# Makefiles must include the .d files like this: -include $(OBJS_$(d):.o=.d) |
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# or, when compiling and linking in one step: -include $(TGTS_$(d):%=%.d) |
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|
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dep=$tgt.d |
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rm -f $dep |
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|
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$CC -MMD $cmdline |
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res=$? |
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|
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dgcc3=`echo $tgt | sed -e 's/\.[^.]*$//'`.d |
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dgcc=`echo $fil | sed -e 's/[^ ]*\.[^c]//' -e 's/\.c/\.d/g' -e 's%.*/%%g'` |
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|
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if [ $res != 0 ] |
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then |
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rm -f $dgcc3 $dgcc |
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exit $res |
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fi |
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|
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for tf in $dgcc3 $dgcc |
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do |
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if [ -f $tf ] && mv $tf $dep.tmp |
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then |
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sed -e "s%.*:%$tgt $dep:%" < $dep.tmp >> $dep |
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sed -e 's%^.*:%%' -e 's%^ *%%' -e 's% *\\$%%' -e 's%$%:%' \ |
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< $dep.tmp >> $dep |
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rm -f $dep.tmp |
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found=1 |
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fi |
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done |
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|
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[ "$found" = "1" ] && exit 0 |
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|
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echo ERROR: $0: Cannot find any compiler-generated dependency files\! |
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exit 1 |
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|
