Hi all, My platform is: uname -a Linux suse-11-sp3 3.0.77-0.11-xen #1 SMP Tue Mar 11 16:48:56 CST 2014 x86_64 x86_64 x86_64 GNU/Linux
gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.5/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++/4.5 --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 --program-suffix=-4.5 --enable-linux-futex --without-system-libunwind --enable-gold --with-plugin-ld=/usr/bin/gold --with-arch-32=i586 --with-tune=generic --build=x86_64-suse-linux Thread model: posix gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux) When I try to compile the source code to x86_64 linuxapp, I got this error message: lib/librte_pmd_enic/enic_main.c: In function ?enic_set_rsskey?: lib/librte_pmd_enic/enic_main.c:862:2: error: value computed is not used I dig out that, it was ome issue of the macros rte_memcpy() #define rte_memcpy(dst, src, n) \ ((__builtin_constant_p(n)) ? \ memcpy((dst), (src), (n)) : \ rte_memcpy_func((dst), (src), (n))) When I use only (n) instead of (__builtin_constant_p(n), it will pass( I know that it was incorrect, just a experiment). But I try to use inline function instead of macros: static inline void * rte_memcpy(void *dst, const void *src, size_t n) { return __builtin_constant_p(n) ? memcpy(dst, src, n) : rte_memcpy_func(dst, src, n); } It will pass:), and works, this could be one potential workaround fix. Who knows why? The root cause is what? I've no idea about this. Thanks, Michael
