Hello, I want to use GCOV to measure how many statement/functions of GNU Scientific Library (GSL) have been reached by a user-defined program. The user-defined program is an example from GSL’s manual: https://www.gnu.org/software/gsl/manual/html_node/Example-statistical-programs.html. Something llke *#include <stdio.h> * *#include <gsl/gsl_statistics.h> * *int * *main(void) * *{ * * double data[5] = {17.2, 18.1, 16.5, 18.3, 12.6}; * *... * * smallest = gsl_stats_min(data, 1, 5); * *… * *return 0; * *} * First, I compiled GSL with relevant flags: ./configure CFLAGS="-fprofile-arcs -ftest-coverage -g -O0” Then, I compiled and linked the example program to GSL: gcc -fprofile-arcs -ftest-coverage -g -O0 example.c -lgsl -lgslcblas -lm At last I ran the example program: LD_LIBRARY_PATH=/usr/local/lib ./a.out But, I could only see example.gcov, namely, only coverage info for the example seems to be produced. Where did it go wrong? How can I also get coverage for the code in GSL part? Thanks. Zhoulai