Commit a6847973cba329ae079d3bd26341a4ec2906f012

Authored by bassamtabbara
2 parents 185295f2 0690ba86
Exists in master and in 1 other branch v3

Merge branch 'simd-runtime-detection' into 'master'

Support for runtime detection of SIMD

This merge request adds support for runtime SIMD detection. The idea is that you would build gf-complete with full SIMD support, and gf_init will select the appropriate function at runtime based on the capabilities of the target machine. This would eliminate the need to build different versions of the code for different processors (you still need to build for different archs). Ceph for example has 3-4 flavors of jerasure on Intel (and does not support PCLMUL optimizations as a result of using to many binaries). Numerous libraries have followed as similar approach include zlib.

When reviewing this merge request I recommend that you look at each of the 5 commits independently. The first 3 commits don't change the existing logic. Instead they add debugging functions and test scripts that facilitate testing of the 4th and commit. The 4th commit is where all the new logic goes along with tests. The 5th commit fixes build scripts.

I've tested this on x86_64, arm, and aarch64 using QEMU. Numerous tests have been added that help this code and could help with future testing of gf-complete. Also I've compared the functions selected with the old code (prior to runtime SIMD support) with the new code and all functions are identical. Here's a gist with the test results prior to SIMD extensions: https://gist.github.com/bassamtabbara/d9a6dcf0a749b7ab01bc2953a359edec.

See merge request !18
.gitignore
... ... @@ -50,6 +50,10 @@ config.sub
50 50 ltmain.sh
51 51 m4/libtool.m4
52 52 m4/ltversion.m4
  53 +m4/ltoptions.m4
  54 +m4/ltsugar.m4
  55 +m4/lt~obsolete.m4
  56 +test-driver
53 57 src/.dirstamp
54 58 test-driver
55 59  
... ... @@ -68,3 +72,7 @@ tools/gf_methods
68 72 tools/gf_mult
69 73 tools/gf_poly
70 74 tools/gf_time
  75 +tools/gf_unit_w*
  76 +tools/test-suite.log
  77 +tools/.qemu/
  78 +tools/test_simd*.results*
... ...
... ... @@ -1,347 +0,0 @@
1   -#! /bin/sh
2   -# Wrapper for compilers which do not understand '-c -o'.
3   -
4   -scriptversion=2012-10-14.11; # UTC
5   -
6   -# Copyright (C) 1999-2013 Free Software Foundation, Inc.
7   -# Written by Tom Tromey <tromey@cygnus.com>.
8   -#
9   -# This program is free software; you can redistribute it and/or modify
10   -# it under the terms of the GNU General Public License as published by
11   -# the Free Software Foundation; either version 2, or (at your option)
12   -# any later version.
13   -#
14   -# This program is distributed in the hope that it will be useful,
15   -# but WITHOUT ANY WARRANTY; without even the implied warranty of
16   -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17   -# GNU General Public License for more details.
18   -#
19   -# You should have received a copy of the GNU General Public License
20   -# along with this program. If not, see <http://www.gnu.org/licenses/>.
21   -
22   -# As a special exception to the GNU General Public License, if you
23   -# distribute this file as part of a program that contains a
24   -# configuration script generated by Autoconf, you may include it under
25   -# the same distribution terms that you use for the rest of that program.
26   -
27   -# This file is maintained in Automake, please report
28   -# bugs to <bug-automake@gnu.org> or send patches to
29   -# <automake-patches@gnu.org>.
30   -
31   -nl='
32   -'
33   -
34   -# We need space, tab and new line, in precisely that order. Quoting is
35   -# there to prevent tools from complaining about whitespace usage.
36   -IFS=" "" $nl"
37   -
38   -file_conv=
39   -
40   -# func_file_conv build_file lazy
41   -# Convert a $build file to $host form and store it in $file
42   -# Currently only supports Windows hosts. If the determined conversion
43   -# type is listed in (the comma separated) LAZY, no conversion will
44   -# take place.
45   -func_file_conv ()
46   -{
47   - file=$1
48   - case $file in
49   - / | /[!/]*) # absolute file, and not a UNC file
50   - if test -z "$file_conv"; then
51   - # lazily determine how to convert abs files
52   - case `uname -s` in
53   - MINGW*)
54   - file_conv=mingw
55   - ;;
56   - CYGWIN*)
57   - file_conv=cygwin
58   - ;;
59   - *)
60   - file_conv=wine
61   - ;;
62   - esac
63   - fi
64   - case $file_conv/,$2, in
65   - *,$file_conv,*)
66   - ;;
67   - mingw/*)
68   - file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
69   - ;;
70   - cygwin/*)
71   - file=`cygpath -m "$file" || echo "$file"`
72   - ;;
73   - wine/*)
74   - file=`winepath -w "$file" || echo "$file"`
75   - ;;
76   - esac
77   - ;;
78   - esac
79   -}
80   -
81   -# func_cl_dashL linkdir
82   -# Make cl look for libraries in LINKDIR
83   -func_cl_dashL ()
84   -{
85   - func_file_conv "$1"
86   - if test -z "$lib_path"; then
87   - lib_path=$file
88   - else
89   - lib_path="$lib_path;$file"
90   - fi
91   - linker_opts="$linker_opts -LIBPATH:$file"
92   -}
93   -
94   -# func_cl_dashl library
95   -# Do a library search-path lookup for cl
96   -func_cl_dashl ()
97   -{
98   - lib=$1
99   - found=no
100   - save_IFS=$IFS
101   - IFS=';'
102   - for dir in $lib_path $LIB
103   - do
104   - IFS=$save_IFS
105   - if $shared && test -f "$dir/$lib.dll.lib"; then
106   - found=yes
107   - lib=$dir/$lib.dll.lib
108   - break
109   - fi
110   - if test -f "$dir/$lib.lib"; then
111   - found=yes
112   - lib=$dir/$lib.lib
113   - break
114   - fi
115   - if test -f "$dir/lib$lib.a"; then
116   - found=yes
117   - lib=$dir/lib$lib.a
118   - break
119   - fi
120   - done
121   - IFS=$save_IFS
122   -
123   - if test "$found" != yes; then
124   - lib=$lib.lib
125   - fi
126   -}
127   -
128   -# func_cl_wrapper cl arg...
129   -# Adjust compile command to suit cl
130   -func_cl_wrapper ()
131   -{
132   - # Assume a capable shell
133   - lib_path=
134   - shared=:
135   - linker_opts=
136   - for arg
137   - do
138   - if test -n "$eat"; then
139   - eat=
140   - else
141   - case $1 in
142   - -o)
143   - # configure might choose to run compile as 'compile cc -o foo foo.c'.
144   - eat=1
145   - case $2 in
146   - *.o | *.[oO][bB][jJ])
147   - func_file_conv "$2"
148   - set x "$@" -Fo"$file"
149   - shift
150   - ;;
151   - *)
152   - func_file_conv "$2"
153   - set x "$@" -Fe"$file"
154   - shift
155   - ;;
156   - esac
157   - ;;
158   - -I)
159   - eat=1
160   - func_file_conv "$2" mingw
161   - set x "$@" -I"$file"
162   - shift
163   - ;;
164   - -I*)
165   - func_file_conv "${1#-I}" mingw
166   - set x "$@" -I"$file"
167   - shift
168   - ;;
169   - -l)
170   - eat=1
171   - func_cl_dashl "$2"
172   - set x "$@" "$lib"
173   - shift
174   - ;;
175   - -l*)
176   - func_cl_dashl "${1#-l}"
177   - set x "$@" "$lib"
178   - shift
179   - ;;
180   - -L)
181   - eat=1
182   - func_cl_dashL "$2"
183   - ;;
184   - -L*)
185   - func_cl_dashL "${1#-L}"
186   - ;;
187   - -static)
188   - shared=false
189   - ;;
190   - -Wl,*)
191   - arg=${1#-Wl,}
192   - save_ifs="$IFS"; IFS=','
193   - for flag in $arg; do
194   - IFS="$save_ifs"
195   - linker_opts="$linker_opts $flag"
196   - done
197   - IFS="$save_ifs"
198   - ;;
199   - -Xlinker)
200   - eat=1
201   - linker_opts="$linker_opts $2"
202   - ;;
203   - -*)
204   - set x "$@" "$1"
205   - shift
206   - ;;
207   - *.cc | *.CC | *.cxx | *.CXX | *.[cC]++)
208   - func_file_conv "$1"
209   - set x "$@" -Tp"$file"
210   - shift
211   - ;;
212   - *.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO])
213   - func_file_conv "$1" mingw
214   - set x "$@" "$file"
215   - shift
216   - ;;
217   - *)
218   - set x "$@" "$1"
219   - shift
220   - ;;
221   - esac
222   - fi
223   - shift
224   - done
225   - if test -n "$linker_opts"; then
226   - linker_opts="-link$linker_opts"
227   - fi
228   - exec "$@" $linker_opts
229   - exit 1
230   -}
231   -
232   -eat=
233   -
234   -case $1 in
235   - '')
236   - echo "$0: No command. Try '$0 --help' for more information." 1>&2
237   - exit 1;
238   - ;;
239   - -h | --h*)
240   - cat <<\EOF
241   -Usage: compile [--help] [--version] PROGRAM [ARGS]
242   -
243   -Wrapper for compilers which do not understand '-c -o'.
244   -Remove '-o dest.o' from ARGS, run PROGRAM with the remaining
245   -arguments, and rename the output as expected.
246   -
247   -If you are trying to build a whole package this is not the
248   -right script to run: please start by reading the file 'INSTALL'.
249   -
250   -Report bugs to <bug-automake@gnu.org>.
251   -EOF
252   - exit $?
253   - ;;
254   - -v | --v*)
255   - echo "compile $scriptversion"
256   - exit $?
257   - ;;
258   - cl | *[/\\]cl | cl.exe | *[/\\]cl.exe )
259   - func_cl_wrapper "$@" # Doesn't return...
260   - ;;
261   -esac
262   -
263   -ofile=
264   -cfile=
265   -
266   -for arg
267   -do
268   - if test -n "$eat"; then
269   - eat=
270   - else
271   - case $1 in
272   - -o)
273   - # configure might choose to run compile as 'compile cc -o foo foo.c'.
274   - # So we strip '-o arg' only if arg is an object.
275   - eat=1
276   - case $2 in
277   - *.o | *.obj)
278   - ofile=$2
279   - ;;
280   - *)
281   - set x "$@" -o "$2"
282   - shift
283   - ;;
284   - esac
285   - ;;
286   - *.c)
287   - cfile=$1
288   - set x "$@" "$1"
289   - shift
290   - ;;
291   - *)
292   - set x "$@" "$1"
293   - shift
294   - ;;
295   - esac
296   - fi
297   - shift
298   -done
299   -
300   -if test -z "$ofile" || test -z "$cfile"; then
301   - # If no '-o' option was seen then we might have been invoked from a
302   - # pattern rule where we don't need one. That is ok -- this is a
303   - # normal compilation that the losing compiler can handle. If no
304   - # '.c' file was seen then we are probably linking. That is also
305   - # ok.
306   - exec "$@"
307   -fi
308   -
309   -# Name of file we expect compiler to create.
310   -cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'`
311   -
312   -# Create the lock directory.
313   -# Note: use '[/\\:.-]' here to ensure that we don't use the same name
314   -# that we are using for the .o file. Also, base the name on the expected
315   -# object file name, since that is what matters with a parallel build.
316   -lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d
317   -while true; do
318   - if mkdir "$lockdir" >/dev/null 2>&1; then
319   - break
320   - fi
321   - sleep 1
322   -done
323   -# FIXME: race condition here if user kills between mkdir and trap.
324   -trap "rmdir '$lockdir'; exit 1" 1 2 15
325   -
326   -# Run the compile.
327   -"$@"
328   -ret=$?
329   -
330   -if test -f "$cofile"; then
331   - test "$cofile" = "$ofile" || mv "$cofile" "$ofile"
332   -elif test -f "${cofile}bj"; then
333   - test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile"
334   -fi
335   -
336   -rmdir "$lockdir"
337   -exit $ret
338   -
339   -# Local Variables:
340   -# mode: shell-script
341   -# sh-indentation: 2
342   -# eval: (add-hook 'write-file-hooks 'time-stamp)
343   -# time-stamp-start: "scriptversion="
344   -# time-stamp-format: "%:y-%02m-%02d.%02H"
345   -# time-stamp-time-zone: "UTC"
346   -# time-stamp-end: "; # UTC"
347   -# End:
configure.ac
... ... @@ -29,6 +29,14 @@ AC_CHECK_FUNCS([posix_memalign],
29 29  
30 30 AS_IF([test "x$found_memalign" != "xyes"], [AC_MSG_WARN([No function for aligned memory allocation found])])
31 31  
  32 +AC_ARG_ENABLE([debug-functions],
  33 + AS_HELP_STRING([--enable-debug-func], [Enable debugging of functions selected]))
  34 +AS_IF([test "x$enable_debug_func" = "xyes"], [CPPFLAGS="$CPPFLAGS -DDEBUG_FUNCTIONS"])
  35 +
  36 +AC_ARG_ENABLE([debug-cpu],
  37 + AS_HELP_STRING([--enable-debug-cpu], [Enable debugging of SIMD detection]))
  38 +AS_IF([test "x$enable_debug_cpu" = "xyes"], [CPPFLAGS="$CPPFLAGS -DDEBUG_CPU_DETECTION"])
  39 +
32 40 AX_EXT()
33 41  
34 42 AC_ARG_ENABLE([neon],
... ... @@ -66,5 +74,14 @@ AC_ARG_ENABLE([valgrind],
66 74 [enable_valgrind=no])
67 75 AM_CONDITIONAL(ENABLE_VALGRIND, test "x$enable_valgrind" != xno)
68 76  
  77 +AC_ARG_ENABLE([avx], AS_HELP_STRING([--enable-avx], [Build with AVX optimizations]))
  78 +AX_CHECK_COMPILE_FLAG(-mavx, [ax_cv_support_avx=yes], [])
  79 +
  80 +AS_IF([test "x$enable_avx" = "xyes"],
  81 + [AS_IF([test "x$ax_cv_support_avx" = "xno"],
  82 + [AC_MSG_ERROR([AVX requested but compiler does not support -mavx])],
  83 + [SIMD_FLAGS="$SIMD_FLAGS -mavx"])
  84 + ])
  85 +
69 86 AC_CONFIG_FILES([Makefile src/Makefile tools/Makefile test/Makefile examples/Makefile])
70 87 AC_OUTPUT
... ...
... ... @@ -1,791 +0,0 @@
1   -#! /bin/sh
2   -# depcomp - compile a program generating dependencies as side-effects
3   -
4   -scriptversion=2013-05-30.07; # UTC
5   -
6   -# Copyright (C) 1999-2013 Free Software Foundation, Inc.
7   -
8   -# This program is free software; you can redistribute it and/or modify
9   -# it under the terms of the GNU General Public License as published by
10   -# the Free Software Foundation; either version 2, or (at your option)
11   -# any later version.
12   -
13   -# This program is distributed in the hope that it will be useful,
14   -# but WITHOUT ANY WARRANTY; without even the implied warranty of
15   -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16   -# GNU General Public License for more details.
17   -
18   -# You should have received a copy of the GNU General Public License
19   -# along with this program. If not, see <http://www.gnu.org/licenses/>.
20   -
21   -# As a special exception to the GNU General Public License, if you
22   -# distribute this file as part of a program that contains a
23   -# configuration script generated by Autoconf, you may include it under
24   -# the same distribution terms that you use for the rest of that program.
25   -
26   -# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
27   -
28   -case $1 in
29   - '')
30   - echo "$0: No command. Try '$0 --help' for more information." 1>&2
31   - exit 1;
32   - ;;
33   - -h | --h*)
34   - cat <<\EOF
35   -Usage: depcomp [--help] [--version] PROGRAM [ARGS]
36   -
37   -Run PROGRAMS ARGS to compile a file, generating dependencies
38   -as side-effects.
39   -
40   -Environment variables:
41   - depmode Dependency tracking mode.
42   - source Source file read by 'PROGRAMS ARGS'.
43   - object Object file output by 'PROGRAMS ARGS'.
44   - DEPDIR directory where to store dependencies.
45   - depfile Dependency file to output.
46   - tmpdepfile Temporary file to use when outputting dependencies.
47   - libtool Whether libtool is used (yes/no).
48   -
49   -Report bugs to <bug-automake@gnu.org>.
50   -EOF
51   - exit $?
52   - ;;
53   - -v | --v*)
54   - echo "depcomp $scriptversion"
55   - exit $?
56   - ;;
57   -esac
58   -
59   -# Get the directory component of the given path, and save it in the
60   -# global variables '$dir'. Note that this directory component will
61   -# be either empty or ending with a '/' character. This is deliberate.
62   -set_dir_from ()
63   -{
64   - case $1 in
65   - */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
66   - *) dir=;;
67   - esac
68   -}
69   -
70   -# Get the suffix-stripped basename of the given path, and save it the
71   -# global variable '$base'.
72   -set_base_from ()
73   -{
74   - base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
75   -}
76   -
77   -# If no dependency file was actually created by the compiler invocation,
78   -# we still have to create a dummy depfile, to avoid errors with the
79   -# Makefile "include basename.Plo" scheme.
80   -make_dummy_depfile ()
81   -{
82   - echo "#dummy" > "$depfile"
83   -}
84   -
85   -# Factor out some common post-processing of the generated depfile.
86   -# Requires the auxiliary global variable '$tmpdepfile' to be set.
87   -aix_post_process_depfile ()
88   -{
89   - # If the compiler actually managed to produce a dependency file,
90   - # post-process it.
91   - if test -f "$tmpdepfile"; then
92   - # Each line is of the form 'foo.o: dependency.h'.
93   - # Do two passes, one to just change these to
94   - # $object: dependency.h
95   - # and one to simply output
96   - # dependency.h:
97   - # which is needed to avoid the deleted-header problem.
98   - { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
99   - sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
100   - } > "$depfile"
101   - rm -f "$tmpdepfile"
102   - else
103   - make_dummy_depfile
104   - fi
105   -}
106   -
107   -# A tabulation character.
108   -tab=' '
109   -# A newline character.
110   -nl='
111   -'
112   -# Character ranges might be problematic outside the C locale.
113   -# These definitions help.
114   -upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
115   -lower=abcdefghijklmnopqrstuvwxyz
116   -digits=0123456789
117   -alpha=${upper}${lower}
118   -
119   -if test -z "$depmode" || test -z "$source" || test -z "$object"; then
120   - echo "depcomp: Variables source, object and depmode must be set" 1>&2
121   - exit 1
122   -fi
123   -
124   -# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
125   -depfile=${depfile-`echo "$object" |
126   - sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
127   -tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
128   -
129   -rm -f "$tmpdepfile"
130   -
131   -# Avoid interferences from the environment.
132   -gccflag= dashmflag=
133   -
134   -# Some modes work just like other modes, but use different flags. We
135   -# parameterize here, but still list the modes in the big case below,
136   -# to make depend.m4 easier to write. Note that we *cannot* use a case
137   -# here, because this file can only contain one case statement.
138   -if test "$depmode" = hp; then
139   - # HP compiler uses -M and no extra arg.
140   - gccflag=-M
141   - depmode=gcc
142   -fi
143   -
144   -if test "$depmode" = dashXmstdout; then
145   - # This is just like dashmstdout with a different argument.
146   - dashmflag=-xM
147   - depmode=dashmstdout
148   -fi
149   -
150   -cygpath_u="cygpath -u -f -"
151   -if test "$depmode" = msvcmsys; then
152   - # This is just like msvisualcpp but w/o cygpath translation.
153   - # Just convert the backslash-escaped backslashes to single forward
154   - # slashes to satisfy depend.m4
155   - cygpath_u='sed s,\\\\,/,g'
156   - depmode=msvisualcpp
157   -fi
158   -
159   -if test "$depmode" = msvc7msys; then
160   - # This is just like msvc7 but w/o cygpath translation.
161   - # Just convert the backslash-escaped backslashes to single forward
162   - # slashes to satisfy depend.m4
163   - cygpath_u='sed s,\\\\,/,g'
164   - depmode=msvc7
165   -fi
166   -
167   -if test "$depmode" = xlc; then
168   - # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
169   - gccflag=-qmakedep=gcc,-MF
170   - depmode=gcc
171   -fi
172   -
173   -case "$depmode" in
174   -gcc3)
175   -## gcc 3 implements dependency tracking that does exactly what
176   -## we want. Yay! Note: for some reason libtool 1.4 doesn't like
177   -## it if -MD -MP comes after the -MF stuff. Hmm.
178   -## Unfortunately, FreeBSD c89 acceptance of flags depends upon
179   -## the command line argument order; so add the flags where they
180   -## appear in depend2.am. Note that the slowdown incurred here
181   -## affects only configure: in makefiles, %FASTDEP% shortcuts this.
182   - for arg
183   - do
184   - case $arg in
185   - -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
186   - *) set fnord "$@" "$arg" ;;
187   - esac
188   - shift # fnord
189   - shift # $arg
190   - done
191   - "$@"
192   - stat=$?
193   - if test $stat -ne 0; then
194   - rm -f "$tmpdepfile"
195   - exit $stat
196   - fi
197   - mv "$tmpdepfile" "$depfile"
198   - ;;
199   -
200   -gcc)
201   -## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
202   -## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
203   -## (see the conditional assignment to $gccflag above).
204   -## There are various ways to get dependency output from gcc. Here's
205   -## why we pick this rather obscure method:
206   -## - Don't want to use -MD because we'd like the dependencies to end
207   -## up in a subdir. Having to rename by hand is ugly.
208   -## (We might end up doing this anyway to support other compilers.)
209   -## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
210   -## -MM, not -M (despite what the docs say). Also, it might not be
211   -## supported by the other compilers which use the 'gcc' depmode.
212   -## - Using -M directly means running the compiler twice (even worse
213   -## than renaming).
214   - if test -z "$gccflag"; then
215   - gccflag=-MD,
216   - fi
217   - "$@" -Wp,"$gccflag$tmpdepfile"
218   - stat=$?
219   - if test $stat -ne 0; then
220   - rm -f "$tmpdepfile"
221   - exit $stat
222   - fi
223   - rm -f "$depfile"
224   - echo "$object : \\" > "$depfile"
225   - # The second -e expression handles DOS-style file names with drive
226   - # letters.
227   - sed -e 's/^[^:]*: / /' \
228   - -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
229   -## This next piece of magic avoids the "deleted header file" problem.
230   -## The problem is that when a header file which appears in a .P file
231   -## is deleted, the dependency causes make to die (because there is
232   -## typically no way to rebuild the header). We avoid this by adding
233   -## dummy dependencies for each header file. Too bad gcc doesn't do
234   -## this for us directly.
235   -## Some versions of gcc put a space before the ':'. On the theory
236   -## that the space means something, we add a space to the output as
237   -## well. hp depmode also adds that space, but also prefixes the VPATH
238   -## to the object. Take care to not repeat it in the output.
239   -## Some versions of the HPUX 10.20 sed can't process this invocation
240   -## correctly. Breaking it into two sed invocations is a workaround.
241   - tr ' ' "$nl" < "$tmpdepfile" \
242   - | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
243   - | sed -e 's/$/ :/' >> "$depfile"
244   - rm -f "$tmpdepfile"
245   - ;;
246   -
247   -hp)
248   - # This case exists only to let depend.m4 do its work. It works by
249   - # looking at the text of this script. This case will never be run,
250   - # since it is checked for above.
251   - exit 1
252   - ;;
253   -
254   -sgi)
255   - if test "$libtool" = yes; then
256   - "$@" "-Wp,-MDupdate,$tmpdepfile"
257   - else
258   - "$@" -MDupdate "$tmpdepfile"
259   - fi
260   - stat=$?
261   - if test $stat -ne 0; then
262   - rm -f "$tmpdepfile"
263   - exit $stat
264   - fi
265   - rm -f "$depfile"
266   -
267   - if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
268   - echo "$object : \\" > "$depfile"
269   - # Clip off the initial element (the dependent). Don't try to be
270   - # clever and replace this with sed code, as IRIX sed won't handle
271   - # lines with more than a fixed number of characters (4096 in
272   - # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
273   - # the IRIX cc adds comments like '#:fec' to the end of the
274   - # dependency line.
275   - tr ' ' "$nl" < "$tmpdepfile" \
276   - | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
277   - | tr "$nl" ' ' >> "$depfile"
278   - echo >> "$depfile"
279   - # The second pass generates a dummy entry for each header file.
280   - tr ' ' "$nl" < "$tmpdepfile" \
281   - | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
282   - >> "$depfile"
283   - else
284   - make_dummy_depfile
285   - fi
286   - rm -f "$tmpdepfile"
287   - ;;
288   -
289   -xlc)
290   - # This case exists only to let depend.m4 do its work. It works by
291   - # looking at the text of this script. This case will never be run,
292   - # since it is checked for above.
293   - exit 1
294   - ;;
295   -
296   -aix)
297   - # The C for AIX Compiler uses -M and outputs the dependencies
298   - # in a .u file. In older versions, this file always lives in the
299   - # current directory. Also, the AIX compiler puts '$object:' at the
300   - # start of each line; $object doesn't have directory information.
301   - # Version 6 uses the directory in both cases.
302   - set_dir_from "$object"
303   - set_base_from "$object"
304   - if test "$libtool" = yes; then
305   - tmpdepfile1=$dir$base.u
306   - tmpdepfile2=$base.u
307   - tmpdepfile3=$dir.libs/$base.u
308   - "$@" -Wc,-M
309   - else
310   - tmpdepfile1=$dir$base.u
311   - tmpdepfile2=$dir$base.u
312   - tmpdepfile3=$dir$base.u
313   - "$@" -M
314   - fi
315   - stat=$?
316   - if test $stat -ne 0; then
317   - rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
318   - exit $stat
319   - fi
320   -
321   - for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
322   - do
323   - test -f "$tmpdepfile" && break
324   - done
325   - aix_post_process_depfile
326   - ;;
327   -
328   -tcc)
329   - # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
330   - # FIXME: That version still under development at the moment of writing.
331   - # Make that this statement remains true also for stable, released
332   - # versions.
333   - # It will wrap lines (doesn't matter whether long or short) with a
334   - # trailing '\', as in:
335   - #
336   - # foo.o : \
337   - # foo.c \
338   - # foo.h \
339   - #
340   - # It will put a trailing '\' even on the last line, and will use leading
341   - # spaces rather than leading tabs (at least since its commit 0394caf7
342   - # "Emit spaces for -MD").
343   - "$@" -MD -MF "$tmpdepfile"
344   - stat=$?
345   - if test $stat -ne 0; then
346   - rm -f "$tmpdepfile"
347   - exit $stat
348   - fi
349   - rm -f "$depfile"
350   - # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
351   - # We have to change lines of the first kind to '$object: \'.
352   - sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
353   - # And for each line of the second kind, we have to emit a 'dep.h:'
354   - # dummy dependency, to avoid the deleted-header problem.
355   - sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
356   - rm -f "$tmpdepfile"
357   - ;;
358   -
359   -## The order of this option in the case statement is important, since the
360   -## shell code in configure will try each of these formats in the order
361   -## listed in this file. A plain '-MD' option would be understood by many
362   -## compilers, so we must ensure this comes after the gcc and icc options.
363   -pgcc)
364   - # Portland's C compiler understands '-MD'.
365   - # Will always output deps to 'file.d' where file is the root name of the
366   - # source file under compilation, even if file resides in a subdirectory.
367   - # The object file name does not affect the name of the '.d' file.
368   - # pgcc 10.2 will output
369   - # foo.o: sub/foo.c sub/foo.h
370   - # and will wrap long lines using '\' :
371   - # foo.o: sub/foo.c ... \
372   - # sub/foo.h ... \
373   - # ...
374   - set_dir_from "$object"
375   - # Use the source, not the object, to determine the base name, since
376   - # that's sadly what pgcc will do too.
377   - set_base_from "$source"
378   - tmpdepfile=$base.d
379   -
380   - # For projects that build the same source file twice into different object
381   - # files, the pgcc approach of using the *source* file root name can cause
382   - # problems in parallel builds. Use a locking strategy to avoid stomping on
383   - # the same $tmpdepfile.
384   - lockdir=$base.d-lock
385   - trap "
386   - echo '$0: caught signal, cleaning up...' >&2
387   - rmdir '$lockdir'
388   - exit 1
389   - " 1 2 13 15
390   - numtries=100
391   - i=$numtries
392   - while test $i -gt 0; do
393   - # mkdir is a portable test-and-set.
394   - if mkdir "$lockdir" 2>/dev/null; then
395   - # This process acquired the lock.
396   - "$@" -MD
397   - stat=$?
398   - # Release the lock.
399   - rmdir "$lockdir"
400   - break
401   - else
402   - # If the lock is being held by a different process, wait
403   - # until the winning process is done or we timeout.
404   - while test -d "$lockdir" && test $i -gt 0; do
405   - sleep 1
406   - i=`expr $i - 1`
407   - done
408   - fi
409   - i=`expr $i - 1`
410   - done
411   - trap - 1 2 13 15
412   - if test $i -le 0; then
413   - echo "$0: failed to acquire lock after $numtries attempts" >&2
414   - echo "$0: check lockdir '$lockdir'" >&2
415   - exit 1
416   - fi
417   -
418   - if test $stat -ne 0; then
419   - rm -f "$tmpdepfile"
420   - exit $stat
421   - fi
422   - rm -f "$depfile"
423   - # Each line is of the form `foo.o: dependent.h',
424   - # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
425   - # Do two passes, one to just change these to
426   - # `$object: dependent.h' and one to simply `dependent.h:'.
427   - sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
428   - # Some versions of the HPUX 10.20 sed can't process this invocation
429   - # correctly. Breaking it into two sed invocations is a workaround.
430   - sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
431   - | sed -e 's/$/ :/' >> "$depfile"
432   - rm -f "$tmpdepfile"
433   - ;;
434   -
435   -hp2)
436   - # The "hp" stanza above does not work with aCC (C++) and HP's ia64
437   - # compilers, which have integrated preprocessors. The correct option
438   - # to use with these is +Maked; it writes dependencies to a file named
439   - # 'foo.d', which lands next to the object file, wherever that
440   - # happens to be.
441   - # Much of this is similar to the tru64 case; see comments there.
442   - set_dir_from "$object"
443   - set_base_from "$object"
444   - if test "$libtool" = yes; then
445   - tmpdepfile1=$dir$base.d
446   - tmpdepfile2=$dir.libs/$base.d
447   - "$@" -Wc,+Maked
448   - else
449   - tmpdepfile1=$dir$base.d
450   - tmpdepfile2=$dir$base.d
451   - "$@" +Maked
452   - fi
453   - stat=$?
454   - if test $stat -ne 0; then
455   - rm -f "$tmpdepfile1" "$tmpdepfile2"
456   - exit $stat
457   - fi
458   -
459   - for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
460   - do
461   - test -f "$tmpdepfile" && break
462   - done
463   - if test -f "$tmpdepfile"; then
464   - sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
465   - # Add 'dependent.h:' lines.
466   - sed -ne '2,${
467   - s/^ *//
468   - s/ \\*$//
469   - s/$/:/
470   - p
471   - }' "$tmpdepfile" >> "$depfile"
472   - else
473   - make_dummy_depfile
474   - fi
475   - rm -f "$tmpdepfile" "$tmpdepfile2"
476   - ;;
477   -
478   -tru64)
479   - # The Tru64 compiler uses -MD to generate dependencies as a side
480   - # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
481   - # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
482   - # dependencies in 'foo.d' instead, so we check for that too.
483   - # Subdirectories are respected.
484   - set_dir_from "$object"
485   - set_base_from "$object"
486   -
487   - if test "$libtool" = yes; then
488   - # Libtool generates 2 separate objects for the 2 libraries. These
489   - # two compilations output dependencies in $dir.libs/$base.o.d and
490   - # in $dir$base.o.d. We have to check for both files, because
491   - # one of the two compilations can be disabled. We should prefer
492   - # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
493   - # automatically cleaned when .libs/ is deleted, while ignoring
494   - # the former would cause a distcleancheck panic.
495   - tmpdepfile1=$dir$base.o.d # libtool 1.5
496   - tmpdepfile2=$dir.libs/$base.o.d # Likewise.
497   - tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
498   - "$@" -Wc,-MD
499   - else
500   - tmpdepfile1=$dir$base.d
501   - tmpdepfile2=$dir$base.d
502   - tmpdepfile3=$dir$base.d
503   - "$@" -MD
504   - fi
505   -
506   - stat=$?
507   - if test $stat -ne 0; then
508   - rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
509   - exit $stat
510   - fi
511   -
512   - for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
513   - do
514   - test -f "$tmpdepfile" && break
515   - done
516   - # Same post-processing that is required for AIX mode.
517   - aix_post_process_depfile
518   - ;;
519   -
520   -msvc7)
521   - if test "$libtool" = yes; then
522   - showIncludes=-Wc,-showIncludes
523   - else
524   - showIncludes=-showIncludes
525   - fi
526   - "$@" $showIncludes > "$tmpdepfile"
527   - stat=$?
528   - grep -v '^Note: including file: ' "$tmpdepfile"
529   - if test $stat -ne 0; then
530   - rm -f "$tmpdepfile"
531   - exit $stat
532   - fi
533   - rm -f "$depfile"
534   - echo "$object : \\" > "$depfile"
535   - # The first sed program below extracts the file names and escapes
536   - # backslashes for cygpath. The second sed program outputs the file
537   - # name when reading, but also accumulates all include files in the
538   - # hold buffer in order to output them again at the end. This only
539   - # works with sed implementations that can handle large buffers.
540   - sed < "$tmpdepfile" -n '
541   -/^Note: including file: *\(.*\)/ {
542   - s//\1/
543   - s/\\/\\\\/g
544   - p
545   -}' | $cygpath_u | sort -u | sed -n '
546   -s/ /\\ /g
547   -s/\(.*\)/'"$tab"'\1 \\/p
548   -s/.\(.*\) \\/\1:/
549   -H
550   -$ {
551   - s/.*/'"$tab"'/
552   - G
553   - p
554   -}' >> "$depfile"
555   - echo >> "$depfile" # make sure the fragment doesn't end with a backslash
556   - rm -f "$tmpdepfile"
557   - ;;
558   -
559   -msvc7msys)
560   - # This case exists only to let depend.m4 do its work. It works by
561   - # looking at the text of this script. This case will never be run,
562   - # since it is checked for above.
563   - exit 1
564   - ;;
565   -
566   -#nosideeffect)
567   - # This comment above is used by automake to tell side-effect
568   - # dependency tracking mechanisms from slower ones.
569   -
570   -dashmstdout)
571   - # Important note: in order to support this mode, a compiler *must*
572   - # always write the preprocessed file to stdout, regardless of -o.
573   - "$@" || exit $?
574   -
575   - # Remove the call to Libtool.
576   - if test "$libtool" = yes; then
577   - while test "X$1" != 'X--mode=compile'; do
578   - shift
579   - done
580   - shift
581   - fi
582   -
583   - # Remove '-o $object'.
584   - IFS=" "
585   - for arg
586   - do
587   - case $arg in
588   - -o)
589   - shift
590   - ;;
591   - $object)
592   - shift
593   - ;;
594   - *)
595   - set fnord "$@" "$arg"
596   - shift # fnord
597   - shift # $arg
598   - ;;
599   - esac
600   - done
601   -
602   - test -z "$dashmflag" && dashmflag=-M
603   - # Require at least two characters before searching for ':'
604   - # in the target name. This is to cope with DOS-style filenames:
605   - # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
606   - "$@" $dashmflag |
607   - sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
608   - rm -f "$depfile"
609   - cat < "$tmpdepfile" > "$depfile"
610   - # Some versions of the HPUX 10.20 sed can't process this sed invocation
611   - # correctly. Breaking it into two sed invocations is a workaround.
612   - tr ' ' "$nl" < "$tmpdepfile" \
613   - | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
614   - | sed -e 's/$/ :/' >> "$depfile"
615   - rm -f "$tmpdepfile"
616   - ;;
617   -
618