When compiling SyncEvolution with the recommended developer configure settings, I get the following error: src/syncevo/Cmdline.cpp: In member function ‘void SyncEvo::CmdlineTest::testPrintFileTemplatesConfig()’: src/syncevo/Cmdline.cpp:3126:82: error: ignoring return value of ‘int symlink(const char*, const char*)’, declared with attribute warn_unused_result [-Werror=unused-result] symlink("../templates", (m_testDir + "/syncevolution-templates").c_str()); ^ (master branch, checkout from this morning, refreshed with git pull)
On which platform (Linux distro, libc, compiler) is that?
Platform: Ubuntu Trusty Configured using configure --with-synthesis-src=../libsynthesis \ --enable-warnings=fatal \ --enable-unit-tests \ --enable-libcurl \ --disable-shared \ --enable-developer-mode with libsynthesis a git clone from freedesktop; $ dpkg -l | grep libc-dev ii libc-dev-bin 2.19-0ubuntu6 i386 Embedded GNU C Library: Development binaries ii linux-libc-dev:i386 3.13.0-27.50 i386 Linux Kernel Headers for development $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.8/lto-wrapper Target: i686-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-i386 --with-arch-directory=i386 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-targets=all --enable-multiarch --disable-werror --with-arch-32=i686 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu Thread model: posix gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/4.8/lto-wrapper Target: i686-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-i386 --with-arch-directory=i386 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-targets=all --enable-multiarch --disable-werror --with-arch-32=i686 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu Thread model: posix gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) $ clang -v Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4) Target: i386-pc-linux-gnu Thread model: posix Found candidate GCC installation: /usr/bin/../lib/gcc/i486-linux-gnu/4.0.4 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.4 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.4.7 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.6 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.6.4 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.7 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.7.3 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.8 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.8.2 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.9 Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.9.0 Found candidate GCC installation: /usr/lib/gcc/i486-linux-gnu/4.0.4 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.4 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.4.7 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.6 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.6.4 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.7 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.7.3 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8.2 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9 Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.0 Selected GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/4.8 Compiling with clang instead of gcc yields: /home/emile/SE/syncevolution/../libsynthesis/src/syncml_tk/src/sml/xlt/all/xltdecxml.c:865:17: error: comparison of constant 255 with expression of type 'SmlPcdataExtension_t' is always false [-Werror,-Wtautological-constant-out-of-range-compare] if (ext == 255) {
It's not unusual that different compilers yield different warnings. Trusty is a platform where I currently compile with fatal warnings disabled (configure without the --enable-warnings=fatal). I suggest you do the same, or you prepare patches fixing the warnings.
Gotcha.
Fixed in SyncEvolution master branch, together with some other issues that I also ran into when adding compilation with tests enabled and strict warnings on Trusty.
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