Hi All, I apologize if this has been reported before, but I couldn't find it after a long search. I encountered problems building bjam on a standard Linux distribution (uname -a: Linux 2.4.21-32.0.1.EL #1 Wed May 25 14:34:59 EDT 2005 i686 i686 i386 GNU/Linux) with gcc. (same problem with gcc 3.2.2 or 4.0.1). The executable seg faulted every time. I tracked it to the function var_defines() in variable.c which had a logic error at lines 124-130. I didn't investigate far enough to determine why the function was receiving strings consisting of a single quote, and I do not know if this is irregular or not, but in any case the attached patch (output from diff -c) corrects the issue. -Lewis *** boost-jam-3.1.11/variable.c 2005-05-29 23:42:38.000000000 -0400 --- variable.c 2005-09-25 22:27:31.000000000 -0400 *************** *** 121,127 **** # endif size_t len = strlen(val + 1); ! int quoted = val[1] == '"' && val[len] == '"'; if ( quoted && preprocess ) { --- 121,127 ---- # endif size_t len = strlen(val + 1); ! int quoted = val[1] == '"' && val[len] == '"' && len>1; if ( quoted && preprocess ) {