In stddef.h, __GNUG__ appears to be undefined while size_t is defined so that this will fail:
#if !(defined (__GNUG__) && defined (size_t)) typedef __SIZE_TYPE__ size_t; Compiler invocation: gcc -DHAVE_CONFIG_H -I. -I. -I. -Iinclude -m32 -O2 -Wall -MT antlr3basetree.lo -MD -MP -MF ".deps/antlr3basetree.Tpo" -c -o antlr3basetree.lo `test -f 'src/antlr3basetree.c' || echo './'`src/antlr3basetree.c; Compiler output: In file included from /usr/include/stdio.h:34, from include/antlr3defs.h:219, from include/antlr3basetree.h:37, from src/antlr3basetree.c:1: /usr/lib/gcc/x86_64-linux-gnu/4.4.4/include/stddef.h:211: error: duplicate ‘unsigned’ /usr/lib/gcc/x86_64-linux-gnu/4.4.4/include/stddef.h:211: error: two or more data types in declaration specifiers Preprocessor output: # 211 "/usr/lib/gcc/x86_64-linux-gnu/4.4.4/include/stddef.h" 3 4 typedef unsigned int unsigned int; Output of gcc -v: Using built-in specs. Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.4.4-6' --with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --with-arch-32=i586 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.4.4 (Debian 4.4.4-6) -- Summary: size_t typedef failure Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: aj at member dot fsf dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44961