[Mldonkey-users] [patch #4905] missing -fno-fomit-frame-pointer from config/Makefile.in breaks CryptoCC

[mike]

URL:
  <http://savannah.nongnu.org/patch/?func=detailitem&item_id=4905>

                 Summary: missing -fno-fomit-frame-pointer from
config/Makefile.in breaks CryptoCC
                 Project: mldonkey, a multi-networks file-sharing client
            Submitted by: mikex
            Submitted on: Fri 02/10/06 at 19:30
                Category: None
                Priority: 3 - Low
                  Status: None
             Assigned to: None
        Originator Email: 
             Open/Closed: Open

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Details:

ronin [local/src/mldonkey]% grep -n CXX config/Makefile.in
301:  CRYPTOPP_LIBS_flags += -cc '$(CXX) $(CXXFLAGS)' -ccopt
-fno-omit-frame-pointer
2047:   $(CXX) $(CXXFLAGS) -o $*.o "-I$(OCAMLLIB)" -c $<

If CXXFLAGS contains -fomit-frame-pointer, mldonkey hangs using 99% cpu.
Adding -fno-fomit-frame-pointer to line 2047 after $(CXXFLAGS) resolves the
issue, but this behaviour is *not* guaranteed by gcc (g++).

******* from #gcc on freenode:
20:53 < mikeX> if both -fomit-frame-pointer and -fno-fomit-frame-pointer are
present on the command line, which one is used?
21:03 < UziMonkey> perhaps the latest one specified?
21:04 < mikeX> indeed, just came to the same conclusion
21:05 < UziMonkey> no, it's not right
21:05 < UziMonkey> -fno-omit-frame-pointer always forces the frame pointer
21:05 < UziMonkey> objdump doesn't lie, no matter what the docs say
21:05 < mikeX> nope, my tests indicate otherwise (gcc-3.3.5)
21:06 < UziMonkey> hmm..  then you'd better not rely on either behavior
21:06 < UziMonkey> I'm using 4.0.3, and no matter which order I put the
switches, the frame pointer is always there

**************** my tests:

ronin [local/src/void]% ./build -c libmd5crc.c
gcc-3.3 -c libmd5crc.c -o "test_[gcc-3.3]"
gcc-3.3 -c libmd5crc.c -fomit-frame-pointer -o
"test_[gcc-3.3]_[-fomit-frame-pointer]"
gcc-3.3 -c libmd5crc.c -fno-omit-frame-pointer -o
"test_[gcc-3.3]_[-fno-omit-frame-pointer]"
gcc-3.3 -c libmd5crc.c -fomit-frame-pointer -fno-omit-frame-pointer -o
"test_[gcc-3.3]_[-fomit-frame-pointer -fno-omit-frame-pointer]"
gcc-3.3 -c libmd5crc.c -fno-omit-frame-pointer -fomit-frame-pointer -o
"test_[gcc-3.3]_[-fno-omit-frame-pointer -fomit-frame-pointer]"
gcc-3.4 -c libmd5crc.c -o "test_[gcc-3.4]"
gcc-3.4 -c libmd5crc.c -fomit-frame-pointer -o
"test_[gcc-3.4]_[-fomit-frame-pointer]"
gcc-3.4 -c libmd5crc.c -fno-omit-frame-pointer -o
"test_[gcc-3.4]_[-fno-omit-frame-pointer]"
gcc-3.4 -c libmd5crc.c -fomit-frame-pointer -fno-omit-frame-pointer -o
"test_[gcc-3.4]_[-fomit-frame-pointer -fno-omit-frame-pointer]"
gcc-3.4 -c libmd5crc.c -fno-omit-frame-pointer -fomit-frame-pointer -o
"test_[gcc-3.4]_[-fno-omit-frame-pointer -fomit-frame-pointer]"
ronin [local/src/void]% md5sum test_\[gcc-3.* 
eb106b45ea8f58d31dd50166c1effaf6  test_[gcc-3.3]
eb106b45ea8f58d31dd50166c1effaf6  test_[gcc-3.3]_[-fno-omit-frame-pointer]
76eee4a8de696b520325b3a2328654f0  test_[gcc-3.3]_[-fno-omit-frame-pointer
-fomit-frame-pointer]
76eee4a8de696b520325b3a2328654f0  test_[gcc-3.3]_[-fomit-frame-pointer]
eb106b45ea8f58d31dd50166c1effaf6  test_[gcc-3.3]_[-fomit-frame-pointer
-fno-omit-frame-pointer]
ea6665c77e03fc224e1945d86c886281  test_[gcc-3.4]
ea6665c77e03fc224e1945d86c886281  test_[gcc-3.4]_[-fno-omit-frame-pointer]
3bf55a0846ee15bcbc29123dc456e36b  test_[gcc-3.4]_[-fno-omit-frame-pointer
-fomit-frame-pointer]
3bf55a0846ee15bcbc29123dc456e36b  test_[gcc-3.4]_[-fomit-frame-pointer]
ea6665c77e03fc224e1945d86c886281  test_[gcc-3.4]_[-fomit-frame-pointer
-fno-omit-frame-pointer]








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