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Thread: compilation errors "gcc: all: No such file or directory"

  1. #1
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    Default compilation errors "gcc: all: No such file or directory"

    Qt Code:
    1. #include <QApplication>
    2. #include <QDebug>
    3.  
    4. int main(int argc,char*argv[]){
    5.  
    6. QApplication a(argc,argv);
    7. qDebug()<<"Helloworld";
    8.  
    9. return 0;
    10. }
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    sample_pr_commandline.pro file:

    TEMPLATE = app
    TARGET =
    DEPENDPATH += .
    INCLUDEPATH += .

    # Input
    SOURCES += first.cpp


    namus@namus-desktop:~/Sample_Qt_progs/sample_pr_commandline$ ls
    first.cpp sample_pr_commandline.pro
    namus@namus-desktop:~/Sample_Qt_progs/sample_pr_commandline$ qmake
    namus@namus-desktop:~/Sample_Qt_progs/sample_pr_commandline$ ls
    first.cpp Makefile sample_pr_commandline.pro

    namus@namus-desktop:~/Sample_Qt_progs/sample_pr_commandline$ make
    g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -o first.o first.cpp
    g++ -Wl,-O1 -o sample_pr_commandline first.o -L/usr/lib -lQtGui -lQtCore -lpthread
    gcc first.o all -o first
    gcc: all: No such file or directory
    make: *** [first] Error 1

    Makefile is attached to this thread.
    I am not getting why this error is coming & other programs are running fine.
    Attached Files Attached Files

  2. #2
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    Default Re: compilation errors "gcc: all: No such file or directory"

    It looks like it can't find first.o

    Can you do an ls in the build directory after the compilation error?

  3. #3
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    Default Re: compilation errors "gcc: all: No such file or directory"

    Make is confusing a target "first" generated by qmake in the Makefile with the file "first" and related targets. Rename your source file.

  4. The following user says thank you to ChrisW67 for this useful post:

    lunac (22nd November 2013)

  5. #4
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    Default Re: compilation errors "gcc: all: No such file or directory"

    Thanks Chris,
    After renaming the first.cpp to myprog.cpp, works fine .
    but i didnt clearly understood the reason , can u explain in detail !!!

  6. #5
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    Default Re: compilation errors "gcc: all: No such file or directory"

    The Makefile contains a generated (fake) target called "first" and it also contains a set of explicit and implied rules related to the source file "first.cpp". The make command builds your TARGET (which is named after the directory if not specified) and then decides that because "first.o" changed it must rebuild the "first" target: at this point it gets confused.
    Qt Code:
    1. $ make
    2. /usr/bin/moc -DQT_NO_DEBUG -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSql -I/usr/include/qt4 -I. -I. first.cpp -o first.moc
    3. g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSql -I/usr/include/qt4 -I. -I. -o first.o first.cpp
    4. g++ -Wl,-O1 -Wl,-rpath,/usr/lib/qt4 -o simple_example first.o -L/usr/lib/qt4 -lQtSql -L/usr/lib/mysql -L/usr/lib/qt4 -lQtGui -L/usr/X11R6/lib -lQtCore -lgthread-2.0 -lrt -lglib-2.0 -lpthread
    5. gcc first.o all -o first // <<<<< confused, decides to rebuild "first" target using a file called "all"
    6. gcc: all: No such file or directory
    7. make: *** [first] Error 1
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    You get similar confusion (that make recovers from) if "TARGET = first" even with no files called "first.cpp".
    Qt Code:
    1. $ make
    2. /usr/bin/moc -DQT_NO_DEBUG -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSql -I/usr/include/qt4 -I. -I. main.cpp -o main.moc
    3. g++ -c -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_SQL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSql -I/usr/include/qt4 -I. -I. -o main.o main.cpp
    4. make: Circular all <- first dependency dropped. // <<<< confused but recognises the situation
    5. g++ -Wl,-O1 -Wl,-rpath,/usr/lib/qt4 -o first main.o -L/usr/lib/qt4 -lQtSql -L/usr/lib/mysql -L/usr/lib/qt4 -lQtGui -L/usr/X11R6/lib -lQtCore -lgthread-2.0 -lrt -lglib-2.0 -lpthread
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    Adding
    Qt Code:
    1. .PHONY = first
    To copy to clipboard, switch view to plain text mode 
    to Makefile fixes this problem but probably generates another if the TARGET = first. The change would be overwritten by qmake anyway. Easier to just avoid it.

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