Are you trying to compile current stable or current trunk with clang?
Note: current stable (Inkscape 0.48.4, <lp:inkscape/0.48.x>) does not compile with clang - basic clang support has been implemented in current trunk though (Inkscape 0.48+devel, <lp:inkscape>), as already tracked in bug #992124. AFAICT clang support is unlikely to get backported to the current stable release branch.
Are you trying to compile current stable or current trunk with clang?
Note: current stable (Inkscape 0.48.4, <lp:inkscape/0.48.x>) does not compile with clang - basic clang support has been implemented in current trunk though (Inkscape 0.48+devel, <lp:inkscape>), as already tracked in bug #992124. AFAICT clang support is unlikely to get backported to the current stable release branch.