On Tue, Feb 3, 2015 at 2:28 AM, Matt Turner <matts...@gmail.com> wrote: > Unclear circumstances lead to undefined symbols on x86. > > Bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=536916
A comment[1] on the gentoo bug-tracker suggest doing something along these lines instead (untested)... [1]: https://bugs.gentoo.org/show_bug.cgi?id=536916#c5 diff --git a/configure.ac b/configure.ac index c2d775e..e6daf40 100644 --- a/configure.ac +++ b/configure.ac @@ -175,6 +175,7 @@ fi dnl Check for compiler builtins AX_GCC_BUILTIN([__builtin_bswap32]) AX_GCC_BUILTIN([__builtin_bswap64]) +AX_GCC_BUILTIN([__builtin_clrsb]) AX_GCC_BUILTIN([__builtin_clz]) AX_GCC_BUILTIN([__builtin_clzll]) AX_GCC_BUILTIN([__builtin_ctz]) diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 19c7343..4591830 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -561,7 +561,7 @@ util_last_bit(unsigned u) static INLINE unsigned util_last_bit_signed(int i) { -#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407) && !defined(__INTEL_COMPILER) +#if defined(HAVE___BUILTIN_CLRSB) return 31 - __builtin_clrsb(i); #else if (i >= 0) _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev