CODEWITHSUNDEEP
c++fmt
Alexander Vachenko
Alexander Vachenko

Reputation: 21

problem with including fmt library in several cpp files

Good day!
I installed the fmt library in Ubuntu. Added it in my project

#include "fmt/core.h"
#include "fmt/format.h"
#include "fmt/format-inl.h"

to use fmt::format_int и fmt::format. I added library headers in several cpp files of my project. During linkage I got the mistake "multiple definition":

obj/container.o: In function fmt::v7::format_error::~format_error()': container.cpp:(.text+0x40e): multiple definition of fmt::v7::format_error::~format_error()' obj/line.o:line.cpp:(.text+0x40e): first defined here

I've read something about this mistake. It is recommended to divide declaration and implementation in h and cpp files, to set some status to objects that causes mistake and so on. But all this recommendations imply editing of library (not my!) code!
What is wrong?

I do the following
compilation of files - one by one
g++ -std=c++11 -Wall -o obj/line.o -c /home/...//line.cpp
g++ -std=c++11 -Wall -o obj/container.o -c /home/...//container.cpp
g++ -std=c++11 -Wall -o obj/geometryObject.o -c /...//geometryObject.cpp
g++ -std=c++11 -Wall -o obj/model.o -c /home/...//model.cpp
g++ -std=c++11 -Wall -o obj/point.o -c /home/...//point.cpp
g++ -std=c++11 -Wall -o obj/main.o -c /home/...//main.cpp
Linking - error here
g++ -std=c++11 -Wall -o myapp obj/line.o obj/container.o obj/geometryObject.o obj/model.o obj/point.o obj/main.o

Upvotes: 0

Views: 1567

Answers (1)

vitaut
vitaut

Reputation: 55605

You shouldn't be including fmt/format-inl.h because it's an internal header. Please see the documentation for the list of public headers and what they provide.

Upvotes: 4

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