Dear Jerome,
Thank you, our common discussing helped to know where to search answers. This L option for gcc helped to solve this task: -L/usr/local/lib /usr/bin/gcc -L/usr/lib -L/usr/local/lib ./$FirstOfile `pkg-config --cflags --libs plplot` -lgsl -lgslcblas -lm $(mysql_config --libs) -o ./$HeadOfInpFile After compiling GaussianSmoothedSignalx002c.c works without problems: [seismo@ip TESTxMySQLx005]$ ./GaussianSmoothedSignalx002c 8.824969e-01 1.110900e-02 1.928750e-22 8.911879e-01 1.580862e-02 9.720985e-21 8.996046e-01 2.217477e-02 4.175010e-19 9.077375e-01 3.065989e-02 1.527980e-17 . . . . . 2.546356563906e+01 2.644146351847e+01 2.581375543162e+01 2.518132181277e+01 2.559202826489e+01 2.643653078314e+01 2.587368864419e+01 2.561531328219e+01 2.652174880719e+01 2.642546115534e+01 2.594253765556e+01 2.601854287576e+01 2.689710500557e+01 2.639428397085e+01 2.601772128932e+01 2.634877900964e+01 [seismo@ip TESTxMySQLx005]$ Regards, Serge.
