On 04/06/2017 04:21 AM, Liu Zhilong wrote:
hi, I found this compiling warning, and can reproduce on my Leap42.1, Leap42.2 and SLES12 SP2 with v4.8.5 version of gcc. # gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.8/lto-wrapper Target: x86_64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.8 --enable-ssp --disable-libssp --disable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --enable-linker-build-id --enable-linux-futex --program-suffix=-4.8 --without-system-libunwind --with-arch-32=i586 --with-tune=generic --build=x86_64-suse-linux --host=x86_64-suse-linux Thread model: posix gcc version 4.8.5 (SUSE Linux) # make everything ... ... mdadm.c: In function ‘main’: mdadm.c:1974:29: error: ‘mdfd’ may be used uninitialized in this function [-Werror=maybe-uninitialized] if (dv->devname[0] == '/' || mdfd < 0) ^ mdadm.c:1914:7: note: ‘mdfd’ was declared here int mdfd; ^ cc1: all warnings being treated as errors Makefile:206: recipe for target 'mdadm.Os' failed make: *** [mdadm.Os] Error 1
Crappy compiler, you're running an old gcc. But sure, send me a patch that initializes mdfd to -1.
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