X2Go Bug report logs - #578
nx-libs, Jpeg.cpp compilation error with jpeg-9a, with suggested patch

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Subject: Bug#578: nx-libs, Jpeg.cpp compilation error with jpeg-9a, with suggested patch
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Date: Tue, 19 Aug 2014 20:24:16 -0700
From: Gabriel Marcano <gabemarcano@yahoo.com>
To: "submit@bugs.x2go.org" <submit@bugs.x2go.org>
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[Message part 1 (text/plain, inline)]

Package: nx-libs
Version: HEAD
Tags: Patch

Found this problem while browsing:
    https://bugs.gentoo.org/show_bug.cgi?id=481360

Compiling nx-libs against jpeg-9a leads to a compilation error. Specifically:

    g++ -c -O3 -fno-rtti -fno-exceptions -I../nx-X11/exports/include
        -Wmissing-declarations -fPIC -DIN_ADDR_T=in_addr_t -DVERSION=\"3.5.0\"
        -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
        -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -Wall
        -Wpointer-arith   Jpeg.cpp
    Jpeg.cpp: In function ‘int DecompressJpeg16(unsigned char*, int,
        unsigned int, unsigned int, unsigned char*, int)’:
    Jpeg.cpp:443:29: error: invalid conversion from ‘int’ to ‘boolean’
        [-fpermissive]
    jpeg_read_header(&cinfo, 1);
                                ^
    In file included from Jpeg.cpp:29:0:
    /usr/include/jpeglib.h:1039:13: note: initializing argument 2 of ‘int
        jpeg_read_header(j_decompress_ptr, boolean)’
    EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
                ^
    Jpeg.cpp: In function ‘int DecompressJpeg24(unsigned char*, int,
        unsigned int, unsigned int, unsigned char*, int)’:
    Jpeg.cpp:584:29: error: invalid conversion from ‘int’ to ‘boolean’
        [-fpermissive]
    jpeg_read_header(&cinfo, 1);
                                ^
    In file included from Jpeg.cpp:29:0:
    /usr/include/jpeglib.h:1039:13: note: initializing argument 2 of ‘int
        jpeg_read_header(j_decompress_ptr, boolean)’
    EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
                ^
    Jpeg.cpp: In function ‘int DecompressJpeg32(unsigned char*, int, unsigned
        int, unsigned int, unsigned char*, int)’:
    Jpeg.cpp:721:29: error: invalid conversion from ‘int’ to ‘boolean’
        [-fpermissive]
    jpeg_read_header(&cinfo, 1);
                                ^
    In file included from Jpeg.cpp:29:0:
    /usr/include/jpeglib.h:1039:13: note: initializing argument 2 of ‘int
        jpeg_read_header(j_decompress_ptr, boolean)’
    EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
                ^
    Jpeg.cpp: In function ‘boolean JpegFillInputBuffer(j_decompress_ptr)’:
    Jpeg.cpp:836:10: error: invalid conversion from ‘int’ to ‘boolean’
        [-fpermissive]
    return 1;
            ^
    Makefile:82: recipe for target 'Jpeg.o' failed
    make: *** [Jpeg.o] Error 1

I am attaching a patch to address the problem. Specifically, it appears that
jpeg-9a changed the definition for its "boolean" type from an int to some other
 type (bool in C++, it seems). Using TRUE and FALSE, as provided by the jpeg
library, is what was done to address the problem. After applying the patch
to HEAD (commit 0e3b414ea6ecb6cc359d3b95f5cfeb6096066139), Jpeg.cpp compiles
fine.


Configuration:

Compiling against jpeg-9a.

$ gcc -v
    Using built-in specs.
    COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/4.9.0/gcc
    COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.9.0/lto-wrapper
    Target: x86_64-pc-linux-gnu
    Configured with: /var/tmp/portage/sys-devel/gcc-4.9.0/work/gcc-4.9.0/configure
    --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
    --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.9.0
    --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.0/include
    --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.9.0
    --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.9.0/man
    --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.9.0/info
    --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.0/include/g++-v4
    --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.9.0/python
    --enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
    --disable-werror --with-system-zlib --enable-nls --without-included-gettext
    --enable-checking=release --with-bugurl=https://bugs.gentoo.org/
    --with-pkgversion='Gentoo 4.9.0 p1.0, pie-0.6.0' --enable-libstdcxx-time
    --enable-shared --enable-threads=posix --enable-__cxa_atexit
    --enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64
    --disable-altivec --disable-fixed-point --enable-targets=all
    --disable-libgcj --enable-libgomp --disable-libmudflap --disable-libssp
    --enable-lto --without-cloog
    Thread model: posix
    gcc version 4.9.0 (Gentoo 4.9.0 p1.0, pie-0.6.0) 

$ autoreconf --version
    autoreconf (GNU Autoconf) 2.69


Steps to reproduce:

1. "git clone git://code.x2go.org/nx-libs.git" repository.
2. Change to the "nxcomp" directory.
3. Run "autoreconf" and then do "make Jpeg.o".

Expected outcome:
Successful compilation.

Actual outcome:
Compilation failure, see earlier in the report for the error messages.

[nxlibs-jpeg9a.patch (text/x-patch, attachment)]

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