openSUSE Programming August 2005

programming@lists.opensuse.org

18 participants
12 discussions

Unbufferred output in bash shell
by Verdi March 31 Aug '05

31 Aug '05

Hi, when I redirect the output of a program to a file, e.g. myprog > file.txt, the shell seems to buffer the output before writing to the file. From my observation on my machine, the buffer seems to be 4K. Is there a way to let bash immediately write any output strings to file (not using buffer at all)? TIA. -- Regards, Verdi -- GMX DSL = Maximale Leistung zum minimalen Preis! 2000 MB nur 2,99, Flatrate ab 4,99 Euro/Monat: http://www.gmx.net/de/go/dsl

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Autotools Project-wide settings?
by Steven T. Hatton 30 Aug '05

30 Aug '05

Suppose I want all my source files to be placed under $(top_srcdir)/include/name/space/name, and therefore want something like the results of AM_CPPFLAGS = -I$(top_srcdir)/include in all my gcc invocations. One way I've found, which seems to work is to create a $(top_srcdir)/Makefile.project with the AM_CPPFLAGS line, then include $(top_srcdir)/Makefile.project in all the Makefile.am instances. The only drawback to this is that I need to be sure the line is in all the Makefile.ams. It's not that big of a deal if I'm maintaining by hand, but if I use a tool that manages my Autotools configuration, it may not cooperate. I've read that it's not a good idea to change the CPPFLAGS variable itself, as might be done with autoconf AC_SUBST (VARIABLE, [VALUE]). Is there a way to accomplish this without messing with each Makefile.am? -- Regards, Steven

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Fwd: "Formal" solution: parser.y:7: error: `stderr' undeclared (first use in this function)
by Steven T. Hatton 29 Aug '05

29 Aug '05

I posted this to gnu.gcc.help, but it seems worth asking on this list as well. Particularly since it was strongly suggested by participants that I read this book. This is on SuSE 9.3. --------------- Forwarded message (begin) Subject: "Formal" solution: parser.y:7: error: `stderr' undeclared (first use in this function) From: Hattuari <susudata(a)setidava.kushan.aa> Date: Sat, 27 Aug 2005 00:16:10 -0400 Newsgroup: gnu.gcc.help I'm going through the Goat Book http://sources.redhat.com/autobook/, and when I followed the instructions on how to build the first example, I received the following message: Fri Aug 26 23:47:43:> make if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT parser.o -MD -MP -MF ".deps/parser.Tpo" -c -o parser.o parser.c; \ then mv -f ".deps/parser.Tpo" ".deps/parser.Po"; else rm -f ".deps/parser.Tpo"; exit 1; fi parser.y: In function `yyerror': parser.y:7: error: `stderr' undeclared (first use in this function) parser.y:7: error: (Each undeclared identifier is reported only once parser.y:7: error: for each function it appears in.) make: *** [parser.o] Error 1 I may (probably can) get this to compile by some trial and error. But that's why I'm reading the Goat Book! I've been using the other method for years, and I decided to start doing things right. Starting from scratch in §5.2 this is exactly what I did, and what was output: $ aclocal $ automake --add-missing configure.in: installing `./install-sh' configure.in: installing `./missing' Makefile.am: installing `./INSTALL' Makefile.am: required file `./NEWS' not found Makefile.am: required file `./README' not found Makefile.am: required file `./AUTHORS' not found Makefile.am: required file `./ChangeLog' not found Makefile.am: installing `./COPYING' Makefile.am: installing `./depcomp' # Hey, they told me to do it that way! $ touch NEWS README AUTHORS ChangeLog $ automake --add-missing $ ls AUTHORS Makefile.in configure main.c COPYING NEWS configure.in missing ChangeLog README depcomp nly.c INSTALL aclocal.m4 foo.c parser.y Makefile.am autom4te.cache install-sh scanner.l $ ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for gawk... gawk checking whether make sets $(MAKE)... yes checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ANSI C... none needed checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking for flex... flex checking for yywrap in -lfl... yes checking lex output file root... lex.yy checking whether yytext is a pointer... yes checking for bison... bison -y configure: creating ./config.status config.status: creating Makefile config.status: executing depfiles commands $ make all if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT main.o -MD -MP -MF ".deps/main.Tpo" -c -o main.o main.c; \ then mv -f ".deps/main.Tpo" ".deps/main.Po"; else rm -f ".deps/main.Tpo"; exit 1; fi if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT foo.o -MD -MP -MF ".deps/foo.Tpo" -c -o foo.o foo.c; \ then mv -f ".deps/foo.Tpo" ".deps/foo.Po"; else rm -f ".deps/foo.Tpo"; exit 1; fi if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT nly.o -MD -MP -MF ".deps/nly.Tpo" -c -o nly.o nly.c; \ then mv -f ".deps/nly.Tpo" ".deps/nly.Po"; else rm -f ".deps/nly.Tpo"; exit 1; fi flex scanner.l sed '/^#/ s|lex.yy\.c|scanner.c|' lex.yy.c >scanner.c rm -f lex.yy.c if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT scanner.o -MD -MP -MF ".deps/scanner.Tpo" -c -o scanner.o scanner.c; \ then mv -f ".deps/scanner.Tpo" ".deps/scanner.Po"; else rm -f ".deps/scanner.Tpo"; exit 1; fi bison -y parser.y if test -f y.tab.h; then \ to=`echo "parser_H" | sed \ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`; \ sed -e "/^#/!b" -e "s/Y_TAB_H/$to/g" -e "s|y\.tab\.h|parser.h|" \ y.tab.h >parser.ht; \ rm -f y.tab.h; \ if cmp -s parser.ht parser.h; then \ rm -f parser.ht ;\ else \ mv parser.ht parser.h; \ fi; \ fi if test -f y.output; then \ mv y.output parser.output; \ fi sed '/^#/ s|y\.tab\.c|parser.c|' y.tab.c >parser.ct && mv parser.ct parser.c rm -f y.tab.c if gcc -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"foonly\" -DVERSION=\"1.0\" -DYYTEXT_POINTER=1 -I. -I. -g -O2 -MT parser.o -MD -MP -MF ".deps/parser.Tpo" -c -o parser.o parser.c; \ then mv -f ".deps/parser.Tpo" ".deps/parser.Po"; else rm -f ".deps/parser.Tpo"; exit 1; fi parser.y: In function `yyerror': parser.y:7: error: `stderr' undeclared (first use in this function) parser.y:7: error: (Each undeclared identifier is reported only once parser.y:7: error: for each function it appears in.) make: *** [parser.o] Error 1 I have not tried to fix this yet. The reason I'm asking is not that I want the program to compile. I don't even know what it does. I want to know the _right_ way to solve these kinds of problems. Any suggestions? -- STH --------------- Forwarded message (end) -- Regards, Steven

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C++ technicality
by John D Lamb 24 Aug '05

24 Aug '05

Here's a puzzle: I'd like to define something like typedef std::pair<int,P*> P; I can obviously do class P : public std::pair<int,P*>{}; or typedef std::pair<int,void*> P; The first gives me objects of class P where P.second is a pointer to a subclass of what I really want. The second gives me something where, with careful use of reinterpret_cast, I can create pointers to what I really want. The puzzle is can I create a standard pair where pair.second is a pointer to an element of the class I've created without using reinterpret_cast in some way? There is a real point to this: I'd like to avoid reinterpret_cast so that g++ can detect errors better in a complicated template class (a protected subclass of std::multimap that can act like a linked list) but am constrained to use std::pair and not some convenient derived class. -- JDL

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MonoDevelop: Cannot convert from `Gtk.IconTheme' to `Gtk.IconTheme'
by Steven T. Hatton 22 Aug '05

22 Aug '05

I've been trying to compile MonoDevelop from svn for several days (weeks?) and keep getting the following error: Making all in MonoDevelop.Gui.Utils make[3]: Entering directory `/download/org/go-mono/MonoDevelop/Core/src/MonoDevelop.Gui.Utils' /home/hattons/opt/org/go-mono/bin/mcs -langversion:ISO-1 -out:../../../build/bin/MonoDevelop.Gui.Utils.dll /target:library /r:System.Drawing /r:ICSharpCode.SharpZipLib -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/glib-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/pango-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/atk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/gdk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/gtk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/glib-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/pango-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/atk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/gdk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/gtk-sharp.dll -r:/home/hattons/opt/org/go-mono/lib/mono/gtk-sharp-2.0/art-sharp.dll -r:/usr/lib/mono/gtk-sharp-2.0/gnome-sharp.dll /resource:icons/gnome-fs-regular.png\ ./FileIcons/FileIconLoader.cs\ ./ReportingStream/ReportingStream.cs\ ./DirectoryArchive/Decompressor.cs\ ./DirectoryArchive/TarDecompressor.cs\ ./DirectoryArchive/ZipDecompressor.cs\ ./DirectoryArchive/Bz2Support.cs\ ./DirectoryArchive/GzSupport.cs AssemblyInfo.cs ./FileIcons/FileIconLoader.cs(41,24): error CS1502: The best overloaded method match for `Gnome.Icon.LookupSync(Gtk.IconTheme, Gnome.ThumbnailFactory, string, string, Gnome.IconLookupFlags, out Gnome.IconLookupResultFlags)' has some invalid arguments ./FileIcons/FileIconLoader.cs(41,24): error CS1503: Argument 1: Cannot convert from `Gtk.IconTheme' to `Gtk.IconTheme' Compilation failed: 2 error(s), 0 warnings make[3]: *** [../../../build/bin/MonoDevelop.Gui.Utils.dll] Error 1 make[3]: Leaving directory `/download/org/go-mono/MonoDevelop/Core/src/MonoDevelop.Gui.Utils' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/download/org/go-mono/MonoDevelop/Core/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/download/org/go-mono/MonoDevelop/Core' make: *** [all-recursive] Error 1 I'm not sure if the problem is related to the `-r:/usr/lib/mono/gtk-sharp-2.0/gnome-sharp.dll' argument or not. For some reason, I have not been able to persuade the gtk-sharp build to install gnome-sharp.dll when I do a `make install'. Does anybody have this building on their system? -- Regards, Steven

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Test
by Colin Carter 15 Aug '05

15 Aug '05

Sorry fellas, but I'm not getting any mail, so this is just a test to see if the list is active. Regards, Colin

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Compile option of readline libraries
by s_tama515 09 Aug '05

09 Aug '05

Hi I would like to know how the readline libraries included in the following packages were compiled and archived. readline-5.0-1.2.i586.rpm readline-devlevel-5.0-12.i586.rpm Is there any way to know the compile option of there libraries? Thanks ST

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RE: [suse-programming-e] Remote programming (May be OT)
by Fowler,Jerry 08 Aug '05

08 Aug '05

Adolph, I don't know how much trouble this would be but you could create symbolic links on your machine to point to the NFS mounted libraries. That way you could guarantee that you were picking them up correctly. Jerry. -----Original Message----- From: Adolph & Sharon Weidanz [mailto:timetopaws@gmail.com] Sent: Saturday, August 06, 2005 3:08 PM Cc: suse-programming-e Subject: Re: [suse-programming-e] Remote programming (May be OT) Black, Alain wrote: > telnet/ssh/rsh/rlogin > > -----Original Message----- Yep I can get in that way for text based stuff. But what I want to do is able to use MY IDE but the other systems compiler/debugger. As Jerry mentioned, I tried using NFS. I put a new project on the shared drive (physically on the desktop) and #included <mysql++>, which I know is NOT on my desktop. It compiled fine, so it was using my laptop's libraries. Not what I wanted.. -- Quis custodiet ipsos custodes "To announce that there must be no criticism of the president, or that we are to stand by the president, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public." [Theodore Roosevelt] 1918 Adolph & Sharon Weidanz SuSE 9.2 '78 43' Endeavour Ketch Folding@Home Team 45 S/V Time To Paws -- To unsubscribe, email: suse-programming-e-unsubscribe(a)suse.com For additional commands, email: suse-programming-e-help(a)suse.com Archives can be found at: http://lists.suse.com/archive/suse-programming-e CONFIDENTIALITY NOTICE This message and any included attachments are from Cerner Corporation and are intended only for the addressee. The information contained in this message is confidential and may constitute inside or non-public information under international, federal, or state securities laws. Unauthorized forwarding, printing, copying, distribution, or use of such information is strictly prohibited and may be unlawful. If you are not the addressee, please promptly delete this message and notify the sender of the delivery error by e-mail or you may call Cerner's corporate offices in Kansas City, Missouri, U.S.A at (+1) (816)221-1024. ---------------------------------------- --

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RE: [suse-programming-e] Remote programming (May be OT)
by Black, Alain 06 Aug '05

06 Aug '05

telnet/ssh/rsh/rlogin -----Original Message----- From: Adolph & Sharon Weidanz [mailto:timetopaws@gmail.com] Sent: Friday, August 05, 2005 1:30 PM To: suse-programming-e Subject: Re: [suse-programming-e] Remote programming (May be OT) Fowler,Jerry wrote: > Adolph, > > Why not NFS mount the filesystem containing the source code on the other > box to your machine? > > > Jerry Fowler | Technology Architect, Technical Architecture - Host Actually I was wondering about that. I have NFS server setup on my desktop and the client on my laptop. Currently, I just use it swap files back and forth. I'll have to try setting a kdevelop project up on. The big question is to where the gcc would run. If I do a linux/linux NFS running on my system should be a problem, but if I want to compile it ON the solaris machine.... -- Quis custodiet ipsos custodes "To announce that there must be no criticism of the president, or that we are to stand by the president, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public." [Theodore Roosevelt] 1918 Adolph & Sharon Weidanz SuSE 9.2 '78 43' Endeavour Ketch Folding@Home Team 45 S/V Time To Paws -- To unsubscribe, email: suse-programming-e-unsubscribe(a)suse.com For additional commands, email: suse-programming-e-help(a)suse.com Archives can be found at: http://lists.suse.com/archive/suse-programming-e

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Which endian is up?
by Steven T. Hatton 06 Aug '05

06 Aug '05

I'm trying to parse an ELF file to build a human readable representation. I know it's been done before, and there are tools such as objdump, nm, readelf, c++filt, etc. I can look at the source to see how they are implemented. In most cases, that means reading C, not C++. I do have an example of C++ code that works. I thought it might be a good idea to take a different approach than that code takes. Rather than processing the data from in std::ifstream as ELFIO does, I wanted to read it into a buffer, and work on it from there. One option is to use a std::stringstream, and treat it like and do basically the same thing ELFIO does with the std::ifstream. What I currently have is a std::vector<char>, which I thought would be a good thing to use. But if I try to do that, I have to find a different way to do things such as m_pStream->read( reinterpret_cast<char*>( &m_header ), sizeof( m_header ) ); My intent was to work on the file from the point of view of it just being data, rather than a stream. Is that simply "not the way it's done"? Another question I have is this: The ELF file starts with an identification tag which carries such information as encoding type (big endian, little endian), the class of the machine(32 or 64-bit), etc. That's all in specifically ordered bytes. That leaves a question opened. Doesn't the host encoding determine which byte is treated as 0? IOW, the first four bytes are specified as '0x7f', 'E', 'L', 'F'. If that were read by a machine that uses the opposite endian, would that not come across as 'F','L','E','0x7f'? Even more perplexing is this: the rest of the ELF header is formed of heterogeneous data types. See below. Does that mean some of the data might be put into the wrong location by the reinterpret_cast<> above? // Platform specific definitions. typedef unsigned long Elf32_Addr; typedef unsigned short Elf32_Half; typedef unsigned long Elf32_Off; typedef signed long Elf32_Sword; typedef unsigned long Elf32_Word; // ELF file header struct Elf32_Ehdr { unsigned char e_ident[EI_NIDENT]; Elf32_Half e_type; Elf32_Half e_machine; Elf32_Word e_version; Elf32_Addr e_entry; Elf32_Off e_phoff; Elf32_Off e_shoff; Elf32_Word e_flags; Elf32_Half e_ehsize; Elf32_Half e_phentsize; Elf32_Half e_phnum; Elf32_Half e_shentsize; Elf32_Half e_shnum; Elf32_Half e_shstrndx; }; -- Regards, Steven

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openSUSE Programming August 2005