gprof产生空的输出

我正在运行Ubuntu 16.10并尝试使用gprof来分析程序。 我用标志-pg编译，程序是单线程的。 实际的编译命令是：

g++ -I. -std=c++11 -Wall -Wextra -O3 -pg -fPIC -Wno-unused-parameter -c -o build/obj/performance/stencil_application.o test/performance/stencil_application.cpp g++ -I. -std=c++11 -Wall -Wextra -O3 -pg -Wno-unused-parameter build/obj/performance/stencil_application.o -o build/test/performance/stencil_application

我运行程序需要几秒钟才能完成，并生成一个名为gmon.out的文件。 但是，当我运行gprof ./build/test/performance/stencil_application ，我得到的输出不包含数字。 我只是得到表格标题和不同领域的解释，像这样：

Flat profile: Each sample counts as 0.01 seconds. % cumulative self self total time seconds seconds calls Ts/call Ts/call name % the percentage of the total running time of the time program used by this function. cumulative a running sum of the number of seconds accounted seconds for by this function and those listed above it. self the number of seconds accounted for by this seconds function alone. This is the major sort for this listing. calls the number of times this function was invoked,if this function is profiled,else blank. self the average number of milliseconds spent in this ms/call function per call,else blank. total the average number of milliseconds spent in this ms/call function and its descendents per call,else blank. name the name of the function. This is the minor sort for this listing. The index shows the location of the function in the gprof listing. If the index is in parenthesis it shows where it would appear in the gprof listing if it were to be printed. copyright (C) 2012-2016 Free Software Foundation,Inc. copying and distribution of this file,with or without modification,are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Call graph (explanation follows) granularity: each sample hit covers 2 byte(s) no time propagated index % time self children called name This table describes the call tree of the program,and was sorted by the total amount of time spent in each function and its children.

等等。

我也试着编译没有-O3和-g ，但结果相同。 有人知道什么是错的吗？

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