openSUSE Programming July 2003

programming@lists.opensuse.org

26 participants
39 discussions

by oguz eren

Hi, I'm trying to learn glade. autogen.sh failed on my first try; giving the error below: ./configure: line 4068: syntax error near unexpected token `PACKAGE,' ./configure: line 4068: `PKG_CHECK_MODULES(PACKAGE, $pkg_modules)' Then i learned that i had to install pkgconfig; i did so; but this time autogen gave the following error: checking for gtk+-2.0 >= 2.0.0... Package gtk+-2.0 was not found in the pkg-config search path. Perhaps you should add the directory containing `gtk+-2.0.pc' to the PKG_CONFIG_PATH environment variable No package 'gtk+-2.0' found configure: error: Library requirements (gtk+-2.0 >= 2.0.0) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them. How do i have to set PKG_CONFIG_PATH environment variable? Thanks in advance.

17 years, 9 months

RE: [suse-programming-e] pthread and max. number of threads

by Jonathan Cowherd

The maximum number of pthreads per user is 1024. This is set in the pthread libraries. The maximum number of pthreads for the entire system can be set in proc, but it's unlikely you'd need to change this value. The way they seem to get that number is that pthread's stack space is allocated on the heap and each thread takes 2 megs of heap by default. Linux has a maximum of 2 gig heap per user, so 2meg @ 1024 give you 2 gigs of heap. If you need to increase the maximum number of threads per user, you'll need to recompile the pthread library and decrease the amount of heap per thread. This could have system wide effects, so I don't recommend it except for finely tuned application servers. It's better to re-architect your software around it or move to a different environment. Check out : http://www.jlinux.org/server.html http://www.xde.net/forum/xq/forum.56/thread.24291/qx/thread.htm Jonathan Paul Cowherd Linux and Java Administrator Genscape, Inc. Email: jonathan.cowherd(a)genscape.com Office: (502) 583-3730 Mobile: (502) 314-0444 > -----Original Message----- > From: Verdi March [mailto:cincaipatron@gmx.net] > Sent: Monday, July 28, 2003 2:56 AM > To: suse-programming-e(a)suse.com > Subject: [suse-programming-e] pthread and max. number of threads > > > Hi, > > I want to find out the maximum number of threads allowed on > my machine. > I repeatedly created a thread in a loop, and the result of > running this > small program is: > thread 0 created. > ... > ... > pthread_create error on thread 255, error code = 11 > > Does this error code indicate that the maximum number of threads has > been reached? > > How can I increase this maximum number? Does it involve ulimit? Or > perhaps I need to modify the _POSIX_THREAD_THREADS_MAX and > PTHREAD_THREADS_MAX definitions in /usr/include/bits/local_lim.h? > Currently, they're 64 and 16384 respectively. > > -- > > -- Verdi March -- > > > -- > 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 >

18 years, 2 months

pthread and max. number of threads

by Verdi March

Hi, I want to find out the maximum number of threads allowed on my machine. I repeatedly created a thread in a loop, and the result of running this small program is: thread 0 created. ... ... pthread_create error on thread 255, error code = 11 Does this error code indicate that the maximum number of threads has been reached? How can I increase this maximum number? Does it involve ulimit? Or perhaps I need to modify the _POSIX_THREAD_THREADS_MAX and PTHREAD_THREADS_MAX definitions in /usr/include/bits/local_lim.h? Currently, they're 64 and 16384 respectively. -- -- Verdi March --

18 years, 2 months

Re: [suse-programming-e] pthread and max. number of threads

by Verdi March

On Tuesday 29 July 2003 11:07, keo(a)home.martnet.com wrote: > The reason why you can't create the 3967, is because > /proc/sys/kernel/threads-max refers to the maximum number of KERNEL > level threads, threads created with the clone() system call. beyond cmiiw, but isn't it the case when I create a thread via pthread_create(), and compile my program with "gcc -lpthread"? It's not pth though... -- -- Verdi March --

18 years, 2 months

Which compiler was used

by Derek Fountain

How do I find out which version of GCC a shared object library was compiled with? For example, what did Real use to compile /usr/lib/RealPlayer8/rpnp.so? -- > eatapple core dump

18 years, 3 months

compile problem with template class.

by Cincai Patron

Hi, why this simple codes fail to compile (error during linking)? /************************ Kelas.h **********************/ template<typename T> class Kelas { public: Kelas(); int getInt() const; }; /************************ Kelas.cpp **********************/ #include "Kelas.h" template<typename T> Kelas<T>::Kelas() { } template<typename T> int Kelas<T>::getInt() const { return 100; } /*********************** coba.cpp ***************************/ #include <iostream> #include "Kelas.h" using namespace::std; int main() { Kelas<int> k; cout << k.getInt() << endl; } /*********************** end of coba.cpp ***************************/ Compilation: 1. "g++ -c Kelas.cpp" success. 2. "g++ -c coba.cpp" success. 3. "g++ -o haha coba.o Kelas.o -L." failed: coba.o(.text+0x18): In function `main': : undefined reference to `Kelas<int>::Kelas[in-charge]()' coba.o(.text+0x32): In function `main': : undefined reference to `Kelas<int>::getInt() const' collect2: ld returned 1 exit status TIA. -- -- Verdi March --

18 years, 3 months

LibNcFTP question

by Mohamad Hirwan M S

Hi, I've written an application that uses LibNcFTP libraries to mirror a directory on ftp://ftp.ncbi.nih.gov/blast/ on my local site. However after successfully downloading a few files, the application just exits without giving any errors. Looking at the library debug logs, it shows that the last cmd it issued before it crashes was MDTM (see below). debug.logs Cmd: TYPE I 200: Type set to I Cmd: PASV 227: Entering Passive Mode (130,14,29,30,196,160). Cmd: RETR blast/db/nt.01.tar.gz 150: Opening BINARY mode data connection for blast/db/nt.01.tar.gz (30041781 bytes) 226: Transfer complete. Cmd: MDTM blast/db/other_genomic.tar.gz 213: 20030720075025 Cmd: PASV 227: Entering Passive Mode (130,14,29,30,195,246). Cmd: RETR blast/db/other_genomic.tar.gz 150: Opening BINARY mode data connection for blast/db/other_genomic.tar.gz (258755309 bytes) 226: Transfer complete. Cmd: MDTM blast/db/pataa.tar.gz (crashes after this) Does anybody have any experiance with LibNcFTP or know the problem/solutions? Thanks.

18 years, 3 months

Problems booting standard kernels - SuSE 8.2

by Sid Boyce

I recompiled the SuSE 8.2 kernel (AMD XP2200+) to include my Yoke and Rudder for Flightgear, that runs fine. Using the updated SuSE gcc-3.3. Downloaded 2.4.22-pre + -ac patches. The config is the same as I used on such kernels on SuSE 8.1 and it builds fine, mkinitrd also does the business, but on bootup, it says it can't find the modules for aic7xxx or reiserfs (it does just fine for the modded SuSE 8.2 kernel). I next built aic7xxx and reiserfs into the kernel, no mkinitrd as those are the only two modules that need preload. It now tells me that it can't mount root 03:02. I've only ever seen this when reiserfs wasn't in the kernel or as a module. It says boot with options noapic or acpi=off (I think), then the non-descript "can't mount" message. With 2.6.0-test1-ac2 I at least get root to mount, the generate-modprobe.conf from 8.2 doesn't work, so I pulled over one I had compiled for 8.1. It goes a fair way before it just does nothing -- never gets to the login prompt. Any clues as to why the problems on 2.4.22-pre, but not on 2.6.0-test ? Regards Sid. -- Sid Boyce ... hamradio G3VBV ... Cessna/Warrior Pilot Linux only shop

18 years, 3 months

Problem with "no matching function for call"

by Cincai Patron

I have problem with compilation of multiple source files, g++ reports that it can't found matched methods in constructor of Pool.cpp (see below). /******************* BinaryHeap.h **********************/ template<typename K, typename D> //K = key, D = data. class BinaryHeap { public: typedef int (*compareTo)(const K src, const K dst); BinaryHeap(int size, compareTo ct); }; /********************** Pool.h ************************/ #include "BinaryHeap.h" class Pool { public: Pool(int size); private: typedef struct { ...} Key; typedef BinaryHeap<Key*, GSTask*> tpool; static int compareKey(const Key* src, const Key* dst); tpool* e_pool; }; /******************* Pool.cpp ***********************/ Pool::Pool(int size) { e_pool = new tpool(size, &RRTPool::compareKey); //<---- error here } int Pool::compareKey(const Pool::Key* src, const Pool::Key* dst) { return ...; } /**************** end of Pool.cpp ********************/ The error message is: error: no matching function for call to ` BinaryHeap<Pool::Key*, GSTask*>::BinaryHeap(int&, int (*)(const Pool::Key*, const Pool::Key*))' BinaryHeap.h:19: error: candidates are: BinaryHeap<Pool::Key*, GSTask*>::BinaryHeap(const BinaryHeap<Pool::Key*, GSTask*>&) BinaryHeap.h:34: error: BinaryHeap<K, D>::BinaryHeap(int, int (*)(K, K)) [with K = Pool::Key*, D = GSTask*] <near match> I've make sure that every thing is matched with the template. What am I missing? What I don't understand is, why g++ assumed that I pass an int& to BinaryHeap ctor, while I clearly used an int (the size variable)? And also, I defined compareTo as a typedef to int(*)(const K, const K), but g++ reported (*)(K, K) instead (at line BinaryHeap.h:34) ? -- -- Verdi March --

18 years, 3 months

Help with "error: non-lvalue in unary `&'"

by Verdi March

Hi, here's the situation: I have a template class, one of its method returns the type specified in the template (see Entry<T>::getData()). Problem is, I can't convert its return type to pointer. In method "cetak", the lines: "T* ptr = &(v[0]->getData())" produces compile error: "error: non-lvalue in unary `&'". If, I change the line to: "T* ptr = &(v[0]->data), I got no error. =========================================== #include <iostream> #include <vector> using namespace::std; template<typename T> class Entry { public: T getData() const; T data; }; template<typename T> T Entry<T>::getData() const { return data; } typedef Entry<int> ei; template<typename T> void cetak(int i, const vector<ei*>& v) { T* ptr = &(v[0]->getData()); //<------- Error here. //T* ptr = &(v[0]->data) //<-------- This one success. cout << ptr << endl; cout << *ptr << endl; } int main() { vector<ei*> v; ei* ONE = new ei(); ONE->data = 1; v.push_back(ONE); cetak<int>(0, v); return 0; } =========================================== -- -- Verdi March --

18 years, 3 months

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openSUSE Programming July 2003