PDFhummus error: PDFWriter.h: No such file or directory. I need help to use PDFhummus with QT Creator

SGaist

Build the library properly and use it rather than trying to do it by hand like you do.

ronaldon

@SGaist
How can i made that? In the begin i try compile and import the files .lib but not work for me.

ronaldon

@SGaist
I receive this error now:

C:\Users\Usuario\Documents\QTProjects\build-TestPDFhummus-Desktop_Qt_5_15_2_MinGW_64_bit-Debug..\TestPDFhummus\main.cpp:16: error: undefined reference to PDFWriter::PDFWriter()' debug/main.o: In function qMain(int, char**)':
C:\Users\Usuario\Documents\QTProjects\build-TestPDFhummus-Desktop_Qt_5_15_2_MinGW_64_bit-Debug/../TestPDFhummus/main.cpp:16: undefined reference to `PDFWriter::PDFWriter()'

Now, my .pro is:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    testpdfhummus.cpp

HEADERS += \
    testpdfhummus.h

FORMS += \
    testpdfhummus.ui

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/PDFWriter/ -lPDFWriter

INCLUDEPATH += $$PWD/./pdf_hummus/PDFWriter
DEPENDPATH += $$PWD/./pdf_hummus/PDFWriter

unix:!macx: PRE_TARGETDEPS += $$PWD/./pdf_hummus/Build/PDFWriter/libPDFWriter.a

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/FreeType/ -lFreeType

INCLUDEPATH += $$PWD/./pdf_hummus/FreeType/include
DEPENDPATH += $$PWD/./pdf_hummus/FreeType/include

unix:!macx: PRE_TARGETDEPS += $$PWD/./pdf_hummus/Build/FreeType/libFreeType.a

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/LibJpeg/ -lLibJpeg

INCLUDEPATH += $$PWD/./pdf_hummus/LibJpeg
DEPENDPATH += $$PWD/./pdf_hummus/LibJpeg

unix:!macx: PRE_TARGETDEPS += $$PWD/./pdf_hummus/Build/LibJpeg/libLibJpeg.a

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/LibTiff/ -lLibTiff

INCLUDEPATH += $$PWD/./pdf_hummus/LibTiff
DEPENDPATH += $$PWD/./pdf_hummus/LibTiff

unix:!macx: PRE_TARGETDEPS += $$PWD/./pdf_hummus/Build/LibTiff/libLibTiff.a

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/ZLib/ -lZlib

INCLUDEPATH += $$PWD/./pdf_hummus/ZLib
DEPENDPATH += $$PWD/./pdf_hummus/ZLib

unix:!macx: PRE_TARGETDEPS += $$PWD/./pdf_hummus/Build/ZLib/libZlib.a

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

DISTFILES += \

JonB

@ronaldon

Please when pasting globs of code/.pro file like this learn to use the forum's Code tag to enclose the literal stuff and make it readable by others.
In the text you show, which line are you claiming is the one your MinGW will use to add the necessary options for linking with your PDFWriter library? (You might also look at the link line generated which causes the error you quote.)

ronaldon

@JonB
I'm sorry for the missing code tag, i made the correction. I don't know what MinGW will use. I started my first QT project theses days, i just need learn how configure the external library for develop my routine.

JonB

@ronaldon
It's much better with the code tag! :)

I'm afarid this is not my area so you'll have to wait for someone else to comment, but: I do not think you are linking against the PDFWriter library.

unix:!macx: LIBS += -L$$PWD/./pdf_hummus/Build/PDFWriter/ -lPDFWriter

I think you need that line, or similar, for your MinGW. And I assume that line is only applied if you are compiling for unix (and not macx), whereas as you are Windows.

ronaldon

This post is deleted!

ronaldon

@JonB
My .pro now:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    testpdfhummus.cpp

HEADERS += \
    testpdfhummus.h

FORMS += \
    testpdfhummus.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

#win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/PDFWriter/release/ -lPDFWriter
#else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/PDFWriter/debug/ -lPDFWriter

#INCLUDEPATH += $$PWD/pdf_hummus/PDFWriter
#DEPENDPATH += $$PWD/pdf_hummus/PDFWriter

#win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/pdf_hummus/PDFWriter/release/libPDFWriter.a
#else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/pdf_hummus/PDFWriter/debug/libPDFWriter.a
#else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/pdf_hummus/PDFWriter/release/PDFWriter.lib
#else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/pdf_hummus/PDFWriter/debug/PDFWriter.lib

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/PDFWriter/release/ -lPDFWriter
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/PDFWriter/debug/ -lPDFWriter
else:macx: LIBS += -L$$PWD/pdf_hummus/PDFWriter/ -lPDFWriter

INCLUDEPATH += $$PWD/pdf_hummus/PDFWriter
DEPENDPATH += $$PWD/pdf_hummus/PDFWriter

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/FreeType/release/ -lFreeType
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/FreeType/debug/ -lFreeType
else:macx: LIBS += -L$$PWD/pdf_hummus/FreeType/ -lFreeType

INCLUDEPATH += $$PWD/pdf_hummus/FreeType/Release
DEPENDPATH += $$PWD/pdf_hummus/FreeType/Release

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/LibJpeg/release/ -lLibJpeg
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/LibJpeg/debug/ -lLibJpeg
else:macx: LIBS += -L$$PWD/pdf_hummus/LibJpeg/ -lLibJpeg

INCLUDEPATH += $$PWD/pdf_hummus/LibJpeg/Release
DEPENDPATH += $$PWD/pdf_hummus/LibJpeg/Release

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/LibTiff/release/ -lLibTiff
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/LibTiff/debug/ -lLibTiff
else:macx: LIBS += -L$$PWD/pdf_hummus/LibTiff/ -lLibTiff

INCLUDEPATH += $$PWD/pdf_hummus/LibTiff/Release
DEPENDPATH += $$PWD/pdf_hummus/LibTiff/Release

win32:CONFIG(release, debug|release): LIBS += -L$$PWD/pdf_hummus/ZLib/release/ -lZlib
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/pdf_hummus/ZLib/debug/ -lZlib
else:macx: LIBS += -L$$PWD/pdf_hummus/ZLib/ -lZlib

INCLUDEPATH += $$PWD/pdf_hummus/ZLib/Release
DEPENDPATH += $$PWD/pdf_hummus/ZLib/Release

And the image of error:
alt text

JonB

@ronaldon
I would start by looking at the actual linker command line being executed during the build. All you show is the errors, without showing the command line.

ronaldon

@JonB
This is my compile output:

19:35:50: Running steps for project TestPDFhummus...
19:35:50: Configuration unchanged, skipping qmake step.
19:35:50: Starting: "C:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" -j6
C:/Qt/Tools/mingw810_64/bin/mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory 'C:/Users/Usuario/Documents/QTProjects/build-TestPDFhummus-Desktop_Qt_5_15_2_MinGW_64_bit-Debug'
g++ -c -fno-keep-inline-dllexport -g -std=gnu++11 -Wall -Wextra -Wextra -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NEEDS_QMAIN -I..\TestPDFhummus -I. -I..\TestPDFhummus\pdf_hummus\PDFWriter -I..\TestPDFhummus\pdf_hummus\FreeType\Release -I..\TestPDFhummus\pdf_hummus\LibJpeg\Release -I..\TestPDFhummus\pdf_hummus\LibTiff\Release -I..\TestPDFhummus\pdf_hummus\ZLib\Release -IC:\Qt\5.15.2\mingw81_64\include -IC:\Qt\5.15.2\mingw81_64\include\QtWidgets -IC:\Qt\5.15.2\mingw81_64\include\QtGui -IC:\Qt\5.15.2\mingw81_64\include\QtANGLE -IC:\Qt\5.15.2\mingw81_64\include\QtCore -Idebug -I. -I/include -IC:\Qt\5.15.2\mingw81_64\mkspecs\win32-g++  -o debug\main.o ..\TestPDFhummus\main.cpp
g++ -Wl,-subsystem,windows -mthreads -o debug\TestPDFhummus.exe debug/main.o debug/testpdfhummus.o debug/moc_testpdfhummus.o  -L"C:\Users\Usuario\Documents\QTProjects\TestPDFhummus\pdf_hummus\PDFWriter\debug\PDFWriter.lib" -lPDFWriter -L"C:\Users\Usuario\Documents\QTProjects\TestPDFhummus\pdf_hummus\FreeType\debug" -lFreeType -L"C:\Users\Usuario\Documents\QTProjects\TestPDFhummus\pdf_hummus\LibJpeg\debug" -lLibJpeg -L"C:\Users\Usuario\Documents\QTProjects\TestPDFhummus\pdf_hummus\LibTiff\debug" -lLibTiff -L"C:\Users\Usuario\Documents\QTProjects\TestPDFhummus\pdf_hummus\ZLib\debug" -lZlib C:\Qt\5.15.2\mingw81_64\lib\libQt5Widgets.a C:\Qt\5.15.2\mingw81_64\lib\libQt5Gui.a C:\Qt\5.15.2\mingw81_64\lib\libQt5Core.a  -lmingw32 C:\Qt\5.15.2\mingw81_64\lib\libqtmain.a -LC:\openssl\lib -LC:\Utils\my_sql\mysql-5.7.25-winx64\lib -LC:\Utils\postgresql\pgsql\lib -lshell32 
C:/Qt/Tools/mingw810_64/bin/../lib/gcc/x86_64-w64-mingw32/8.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lPDFWriter
collect2.exe: error: ld returned 1 exit status
mingw32-make[1]: *** [Makefile.Debug:72: debug/TestPDFhummus.exe] Error 1
mingw32-make: *** [Makefile:45: debug] Error 2
mingw32-make[1]: Leaving directory 'C:/Users/Usuario/Documents/QTProjects/build-TestPDFhummus-Desktop_Qt_5_15_2_MinGW_64_bit-Debug'
19:35:57: The process "C:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project TestPDFhummus (kit: Desktop Qt 5.15.2 MinGW 64-bit)
When executing step "Make"
19:35:57: Elapsed time: 00:06.

JonB

@ronaldon said in PDFhummus error: PDFWriter.h: No such file or directory. I need help to use PDFhummus with QT Creator:

-L"C:\Users\Ronaldo Fernandes\Documents\QTProjects\TestPDFhummus\pdf_hummus\PDFWriter\debug\PDFWriter.lib" -lPDFWriter

ld.exe: cannot find -lPDFWriter

There is something wrong here. You have debug\PDFWriter.lib at the end of the -L argument. That is a file, and that is wrong. It should be a directory where -lPDFWriter is to find the PDFWriter library file.

Compare against what else you have in the llinker line, like

-L"C:\Users\Ronaldo Fernandes\Documents\QTProjects\TestPDFhummus\pdf_hummus\FreeType\debug" -lFreeType

See how that -L only names the debug directory for the -lFreeType to search for it? That's how it should be.

Additional to that you have PDFWriter.lib mentioned. But (so far as I know) .lib files are only used as library files for the MSVC compiler. You are using MinGW, its libraries should only be .a files, I believe.

Go look at how the path ending in debug\PDFWriter.lib is being generated, and correct. And make sure what you have for PDFWriter is for MinGW, not for MSVC.

ronaldon

@JonB, Is there a possibility of having a version of the Hummus PDF for MinGW, or do I have to somehow change the output of the compilation to the ".a" file? The PDF project Hummus was developed in the visual studio as far as I could see. What I need is to compile it and add it to my QT Creator project.

JonB

@ronaldon
You cannot link mixing compilers.

MinGW produces .a libraries. MSVC produces .lib libraries. You need to pick one of the two compilers and compile both your own code and third-party code with the same compiler toolchain.