gmake errors: IN /src/opengl/qglbuffer.h for Qt5.5 open source on centos

[depak]

Hi i am getting following errors during gmake of QT5.5 on centos-7.7 with gcc-4.8.5; while building open source5.5.0:

/include/QtOpenGL/../../src/opengl/qglbuffer.h:45:23: error: variable ‘Q_OPENGL_EXPORT QGLBuffer’ has initializer but incomplete type
class Q_OPENGL_EXPORT QGLBuffer
^
../../../../include/QtOpenGL/../../src/opengl/qglbuffer.h:45:23: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [enabled by default]
../../../../include/QtOpenGL/../../src/opengl/qglbuffer.h:47:1: error: expected primary-expression before ‘public’
public:
^
../../../../include/QtOpenGL/../../src/opengl/qglbuffer.h:47:1: error: expected ‘}’ before ‘public’
../../../../include/QtOpenGL/../../src/opengl/qglbuffer.h:47:1: error: expected ‘,’ or ‘;’ before ‘public’
../../../../include/QtOpenGL/../../src/opengl/qglbuffer.h:56:16: error: expected constructor, destructor, or type conversion before ‘;’ token
QGLBuffer();

[SGaist]

Hi and welcome to devnet,

What exact configure command did you use ?
Did you install all required dependencies ?
Why such an outdated version ?

[depak]

1. configure command used:
   ./configure --prefix=/usr/local/Trolltech/Qt-5.5 -opensource -qt-zlib -qt-xcb
2. i have installed all required dependencies, perl-version, openjdk,gcc-4.8.5, libpng, bzip2, xz-devel, libarchive-devel, xz-lzma-compat. Also cmake-3.6.1 and curl-7.50
3. i need to install some product software for that this is the prerequisites.

[SGaist]

1. Please use out of source builds so that if you need to restart you can simply delete the build folder. By the way, Trolltech is not more since 2008.
2. Unless you plan on doing Android development, OpenJDK is not a dependency. In your list there's at least the OpenGL development package that is missing. Please go through the documentation to get a list of all the development packages you need to install.

[depak]

@SGaist Thanks for the reply, but plz provide some explanation about point-1, " use out of source builds" , as i am new to Qt

[SGaist]

This in unrelated to Qt itself.

Just do not build in the source tree.

mkdir build_qt
cd build_qt
/path/to/Qt_sources/configure <list all arguments>

[depak]

@SGaist ok, but can i do like:
cd qt-everywhere-opensource-src-%VERSION%
./configure <list all arguments>

[SGaist]

@depak said in gmake errors: IN /src/opengl/qglbuffer.h for Qt5.5 open source on centos:

@SGaist ok, but can i do like:
cd qt-everywhere-opensource-src-%VERSION%
./configure <list all arguments>

This is an "in source" build so the opposite of what I am suggesting you to do.

[depak]

This post is deleted!

[depak]

@SGaist i tried it on another machine for same source(as the source code is inside a share folder), like:
mkdir build_qt
cd build_qt
/path/to/Qt_sources/configure <list all arguments>

but got following error: " you can not make a shadow build from a source tree containing a previous build"

[jsulm]

@depak said in gmake errors: IN /src/opengl/qglbuffer.h for Qt5.5 open source on centos:

" you can not make a shadow build from a source tree containing a previous build"

You should extract Qt source code again to get a clean state without any build artefacts from your previous builds.

[depak]

@jsulm i tried it, got the following error in gmake:

project error unknown module(s) in qt: openglextensions

[SGaist]

Did you install the OpenGL development libraries ?