Problem with including cstdlib library (No such file or directory)

[Lyokoheros]

@jsulm that didn't change anything. I still get the same error. Which was about stdlib.h, not boost libraries, as I already mentioned.

[SGaist]

@Lyokoheros said in Problem with including cstdlib library (No such file or directory):

stdlib.h

Where do you have that file exactly on your system ?

[Lyokoheros]

@SGaist i find it in a few differen locations:
usr/include
usr/include/c++/8
usr/include/c++/9
usr/include/x86_64-linux-gnu/bits
snap/gnome-3-34-1804/36/usr/include
usr/include/c++/8/tr1
usr/include/c++/9/tr1

[SGaist]

Can you share your .pro file ?

[Lyokoheros]

@SGaist I already do it. .pro file is inside the repository i linked at the very beginning.

QT += core gui widgets

TARGET = BairstowSolver
TEMPLATE = app
CONFIG += \
no_keywords

SOURCES += \
    main.cpp \
    mywidget.cpp \
    solver.cpp \
    solverinterval.cpp

HEADERS += \
    interval.h \
    mywidget.h \
    solver.h \
    solverinterval.h

LIBS +=\
    -L"/usr/local/boost/boost_1_55_0" \
    -L"/usr/include"


INCLUDEPATH +=\
    /usr/local/boost/boost_1_55_0 \
    /usr/include

And here's direct link to it.

[jsulm]

@Lyokoheros said in Problem with including cstdlib library (No such file or directory):

LIBS +=
-L"/usr/local/boost/boost_1_55_0"
-L"/usr/include"

Why did you add /usr/include to search path for libraries?! Also, it is not needed to add it to include paths (INCLUDEPATH) as it is searched by default.

[Lyokoheros]

@jsulm I hade to add it to solve problem with Qt Creator not finding the mpfr.h library (I getttti error "undefined refference to 'mpfr_init2'")

[SGaist]

mpfr.h is a header which are usually found in an include subdir.

"-L" is used to add paths to search for the linker to find additional libraries. Adding include path to it is usually wrong because if there are library files in there, then your system has an installation issue.

Can you build a default project using that header ?

[Lyokoheros]

@SGaist well it was exaclty in that folder, not in any of subfolders.
But well actually when I create new qt widget application it could be easily build with just -L"/usr/include" or just reffering to mpfr.h (simply by including it in class header) all was fine but when I tried to build it with both (-L"/usr/include" in LIBS and including mpfr.h) i got the same error: stdlib.h no such file or directory.
Well at least that's what I saw at the beginning now when I tried to repeat this tests it seems random... sometimes with both it work well, sometimes without this addition to LIBS, sometimes only with it (and not including mpfr.h), other time it's not working just with addition to LIBS(without including mpfr.h)... i don't get it...

But maybe the correct aproach to it would be solving the error, which appear when I don't add "-L"/usr/include"" to LIBS. And this is the said error:

error: main.o: in function `interval_arithmetic::Interval<long double>::IntRead(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/home/ubuntu/Desktop/MetodaBairstowa/interval.h:264: error: undefined reference to `mpfr_init2'
error: /home/ubuntu/Desktop/build-Bairstow-Desktop-Debug/../MetodaBairstowa/interval.h:265: undefined reference to `mpfr_set_str'
error: /home/ubuntu/Desktop/build-Bairstow-Desktop-Debug/../MetodaBairstowa/interval.h:268: undefined reference to `mpfr_get_ld'
error: /home/ubuntu/Desktop/build-Bairstow-Desktop-Debug/../MetodaBairstowa/interval.h:271: undefined reference to `mpfr_get_d'
[and a little bit of similar lines]

[SGaist]

Where is the .so file of that library located ?

[Lyokoheros]

@SGaist .so file of what library? (I know this may seem a stupid question, but before I didn't work much with additional external libraries in c++)

[jsulm]

@Lyokoheros said in Problem with including cstdlib library (No such file or directory):

so file of what library?

The library which defines the undefined references. I guess libmpfr.so or something like that...

[Lyokoheros]

@jsulm I find it in usr/lib/x86_64-linux-gnu, but there is also one in home/ubunutu/anaconda3/lib and a few instances with something like ".6" or ".6.0.2" after the ".so" extension (I know linux technically doesn't have extensions, but I don't know how to call it other way)

[jsulm]

@Lyokoheros

LIBS += -lmpfr

in PRO file should be enough

[Lyokoheros]

@jsulm apparently it wasn't enough.
And actually it turned out I forget implement the interval version of one function, which of course give me some errors after adding -lmpfr to LIBS, but after adding the mentioned implementation I again get just "stdlib.h: No such file or directory" - which point to cstdlib in /usr/include/c++/9/

The .pro file is now like this:

QT += core gui widgets

TARGET = BairstowSolver
TEMPLATE = app
CONFIG += \
no_keywords

SOURCES += \
    main.cpp \
    mywidget.cpp \
    solver.cpp \
    solverinterval.cpp

HEADERS += \
    interval.h \
    mywidget.h \
    solver.h \
    solverinterval.h

LIBS +=\
    -L"/usr/local/boost/boost_1_55_0" \
    -lmpfr


INCLUDEPATH +=\
    /usr/local/boost/boost_1_55_0 \
    /usr/include

For changes in intervalsolver.cpp you can look here

[SGaist]

Nothing stands out...

Do you have the same issue if you use a default project ?

[stryga42]

Could you please provide the compiler output before and after the "stdlib.h: No such file or directory"? Usually there is more information like "included from..." so that you can figure out the whole chain of includes.
As a "shot in the dark" , issues which may create problems like yours could be:

• case sensitive include paths somewhere in your include tree (especially dangerous if you use libs which where developed on Windows)

• something you you include uses absolute include paths (bad practice, should not happen in the libs you mentioned)

• something you you include uses relative include paths for standard headers (also bad practice but ...)

btw, if you need something like -L"/usr/include" to make it work, I would be very wary. Adding an include dir for the linker makes no sense at all, as SGaist and jsulm explained above.

[Lyokoheros]

It was a long time but... well many things happen and I had to abandon this project for some time but now I have to finish it.
Unfortunately I have also to set up my Linux (Ubuntu 20.0.4) anew, and installing all with terminal - I mean QT, QT creator, dev-essentials, etc. and the libraries for Interval.h to work (those according to this instruction: http://www.cs.put.poznan.pl/amarciniak/Interval_Arithmetic_CPP_instrukcja.pdf (I know it's in Polish but only the commends actually matter there)) - so this is clear installation and pretty much no other things were installed.
Firstly I got some problem with QTCreator which didn't detect QT automatically, but I manage to add it manually (it's QT 5.12.8), but now I find much more issues and communicates from QT creator, most of them... isn't exactly clear.
Just for reminder here is repository with my entire code - so far as I can see there's no case sensitive path there also it doesn't seem as any of my includes uses absolut paths or relative include path for standard headers (I don't find any of that in Interval.h and I think I can assume the other libraries I download don't have such issues) - but maybe I'm just missing something...

Also the messages I mention are the following(it is quite long I had to copy it one by one from the IDE, as it hadn't let me to just mark it all...)

/home/ubuntu/Projekty/MetodaBairstowa/mywidget.cpp:1: In file included from ../MetodaBairstowa/mywidget.cpp:1:

/home/ubuntu/Projekty/MetodaBairstowa/mywidget.h:4: In file included from ../MetodaBairstowa/mywidget.h:4:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/QWidget:1: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/QWidget:1:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qwidget.h:43: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qwidget.h:43:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qtwidgetsglobal.h:43: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qtwidgetsglobal.h:43:

/usr/include/x86_64-linux-gnu/qt5/QtGui/qtguiglobal.h:43: In file included from /usr/include/x86_64-linux-gnu/qt5/QtGui/qtguiglobal.h:43:

/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:142: In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:142:

/include/c++/9/algorithm:62: In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/algorithm:62:

/include/c++/9/bits/stl_algo.h:59: In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_algo.h:59:

/include/c++/9/cstdlib:75: error: 'stdlib.h' file not found
#include_next <stdlib.h>
              ^~~~~~

/home/ubuntu/Projekty/MetodaBairstowa/main.cpp:1: In file included from ../MetodaBairstowa/main.cpp:1:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/QApplication:1: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/QApplication:1:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qapplication.h:43: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qapplication.h:43:

/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qtwidgetsglobal.h:43: In file included from /usr/include/x86_64-linux-gnu/qt5/QtWidgets/qtwidgetsglobal.h:43:

/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:142: In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:142:
/include/c++/9/algorithm:62: In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/algorithm:62:

/include/c++/9/bits/stl_algo.h:59: In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_algo.h:59:

/include/c++/9/cstdlib:75: error: 'stdlib.h' file not found
#include_next <stdlib.h>
              ^~~~~~

In file included from ../MetodaBairstowa/solver.cpp../MetodaBairstowa/solverinterval.cpp::1: In file included from In file included from ../MetodaBairstowa/solver.cpp../MetodaBairstowa/solverinterval.cpp::1:
1In file included from :
../MetodaBairstowa/solverinterval.hIn file included from :../MetodaBairstowa/solver.h4:4:
:
In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/QString/usr/include/x86_64-linux-gnu/qt5/QtCore/QString::11: In file included from In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/QString/usr/include/x86_64-linux-gnu/qt5/QtCore/QString::11:
:

In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h::4848: In file included from In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h::4848:
:

In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qchar.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qchar.h::4343: In file included from In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qchar.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qchar.h::4343:
:

In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h::142142: In file included from In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h::142142:
:

In file included from /include/c++/9/algorithm/include/c++/9/algorithm::6262: In file included from In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/algorithm/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/algorithm::6262:
:

In file included from /include/c++/9/bits/stl_algo.h/include/c++/9/bits/stl_algo.h::5959: In file included from In file included from /bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_algo.h/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/stl_algo.h::5959:
:
/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/cstdlib:/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/cstdlib75::7515::15:  fatal errorfatal error: : 'stdlib.h' file not found'stdlib.h' file not found

#include_next <stdlib.h>
#include_next <stdlib.h>              ^~~~

              ^~~~

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:265: error: member reference base type 'const std::string' (aka 'const int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:267: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:270: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:273: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:277: error: member reference base type 'const std::string' (aka 'const int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:279: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:282: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:285: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:288: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:308: error: reference to 'std' is ambiguous

/usr/include/c++/9/ostream:41: candidate found by name lookup is 'std'

/usr/include/c++/9/bits/fstream.tcc:43: candidate found by name lookup is 'std::std'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:308: error: 'T' does not refer to a value

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:295: declared here

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:308: error: no member named 'digits10' in the global namespace

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:309: error: member reference base type 'std::stringstream' (aka 'int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:309: error: reference to 'std' is ambiguous

/usr/include/c++/9/ostream:41: candidate found by name lookup is 'std'
/usr/include/c++/9/bits/fstream.tcc:43: candidate found by name lookup is 'std::std'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:312: error: cannot initialize a variable of type 'std::string' (aka 'int') with an rvalue of type 'const char *'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:314: error: reference to 'std' is ambiguous

/usr/include/c++/9/ostream:41: candidate found by name lookup is 'std'

/usr/include/c++/9/bits/fstream.tcc:43: candidate found by name lookup is 'std::std'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:316: error: member reference base type 'std::stringstream' (aka 'int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:317: error: member reference base type 'std::stringstream' (aka 'int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:317: error: reference to 'std' is ambiguous

/usr/include/c++/9/ostream:41: candidate found by name lookup is 'std'

/usr/include/c++/9/bits/fstream.tcc:43: candidate found by name lookup is 'std::std'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:325: error: reference to 'std' is ambiguous

/usr/include/c++/9/ostream:41: candidate found by name lookup is 'std'

/usr/include/c++/9/bits/fstream.tcc:43: candidate found by name lookup is 'std::std'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:327: error: member reference base type 'std::stringstream' (aka 'int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:328: error: member reference base type 'std::stringstream' (aka 'int') is not a structure or union

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:403: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:406: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:409: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:440: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:442: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:451: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:453: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:462: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:464: error: assigning to 'std::string' (aka 'int') from incompatible type 'const char [21]'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:471: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:476: error: use of undeclared identifier 'strcmp'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:481: error: use of undeclared identifier 'strcmp' 

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:496: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:498: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:506: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:498: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:506: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:510: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:514: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:735: error: use of undeclared identifier 'FE_DOWNWARD'
/home/ubuntu/Projekty/MetodaBairstowa/interval.h:737: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:739: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:747: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:749: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:751: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:758: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:760: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:762: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:771: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:783: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:795: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:807: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:820: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:835: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:845: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:848: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:851: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:865: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:868: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:871: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:896: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:899: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:903: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:906: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:910: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:913: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:917: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:920: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:928: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:931: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:935: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:938: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:942: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:945: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:949: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:952: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:960: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:963: error: use of undeclared identifier 'FE_UPWARD'
/home/ubuntu/Projekty/MetodaBairstowa/interval.h:967: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:970: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:974: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:977: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:981: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:984: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:990: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:999: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1021: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1041: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1044: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1048: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1051: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1055: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1058: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1062: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1065: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1073: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1076: error: use of undeclared identifier 'FE_UPWARD'
/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1080: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1083: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1087: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1090: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1094: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1097: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1109: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1324: error: use of undeclared identifier 'FE_DOWNWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1326: error: use of undeclared identifier 'FE_UPWARD'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:1328: error: use of undeclared identifier 'FE_TONEAREST'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:246: warning: unused parameter 'p'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:251: warning: unused parameter 'o'

/home/ubuntu/Projekty/MetodaBairstowa/interval.h:256: warning: unused parameter 'o'

I tried to analyze it but I couldn't come up with any solution... :'(