Avoid compiler warning. diff -ur dvisvgm-0.8.7.orig/potracelib/potracelib.c dvisvgm-0.8.7/potracelib/potracelib.c --- dvisvgm-0.8.7.orig/potracelib/potracelib.c 2009-08-29 22:06:31.000000000 +0200 +++ dvisvgm-0.8.7/potracelib/potracelib.c 2009-11-13 13:33:11.000000000 +0100 @@ -108,6 +108,6 @@ free(p); } -char *potrace_version(void) { +const char *potrace_version(void) { return "potracelib "VERSION""; } diff -ur dvisvgm-0.8.7.orig/potracelib/potracelib.h dvisvgm-0.8.7/potracelib/potracelib.h --- dvisvgm-0.8.7.orig/potracelib/potracelib.h 2009-08-29 22:06:31.000000000 +0200 +++ dvisvgm-0.8.7/potracelib/potracelib.h 2009-11-13 13:33:12.000000000 +0100 @@ -126,6 +126,6 @@ /* return a static plain text version string identifying this version of potracelib */ -char *potrace_version(void); +const char *potrace_version(void); #endif /* POTRACELIB_H */