On 2020-07-22 20:38+0100 Peter Williams wrote:
Hello Plplot I am at present migrating some PlPlot programs from Windows 10 to linux (mint 64 bit), To facilitate this I have downloaded cmake and Plplot-5.15.0.tar.gz from your website. Following the instructions from your wiki I built an installation consisting of static libraries. In order to test the installation I wrote a very simple program PlPlotTest.c:#include <stdio.h> #include "plplot.h" int main() { printf("Plotting example\n"); plsdev("ps"); plsfnam("TestPlplot.ps");plinit(); plenv(-1.0 , 1.0 ,-1.0,1.0,1,2); pljoin(-0.5,-0.5,0.5,0.5); plend(); printf("Plot finished\n"); return 1; } and attempted to compile it with gcc -c -I /home/peter/plplot/install_directory/include/plplot PlPlotTest.c gcc -o PlPlotTest.exe PlPlotTest.o -L /home/peter/plplot/install_directory/lib -lplplot -lcsirocsa -lqsastime -lm -lX11 An object file PlPlotTest.o was generated with no errors, but the linking failed with [undefined pthread library references].
I am very new to linux. Can you tell me what the linking should be?
Hi Peter: If you execute "man gcc" and look for the -pthread option it says "-pthread Define additional macros required for using the POSIX threads library. You should use this option consistently for both compilation and linking." Therefore, I suggest you add the -pthread option to *both* the compile (gcc -c ....) and link (gcc -o ....) steps above to see if those changes solve solve the pthread library linking issues you have encountered. Alan __________________________ Alan W. Irwin Research affiliation with the Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada. Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
