Re: Various problems

Steve Youngs <youngs(a)xemacs.org&gt; wrote: I can finally reproduce this on my box, after watching the build process on Steve's box. (Thanks, Steve!) Two elements must be present to produce this behavior: 1) Configure with --error-checking=all 2) Compile with no optimization This is taking place on Linux x86 boxes with gcc 2.95.3 in Steve's case, and RedHat's so-called gcc 2.96 (RedHat 7.3) in my case. This all arises from lrecord.h. The name error_check_pgconn is declared in DECLARE_LRECORD, and used in XRECORD. In the case where the misbehavior manifests itself, the preprocessed source (using the same compiler flags used by the Makefile, except with -E replacing -c) contains this before any use of error_check_pgconn (with white space changes for clarity, coupled with removal of redundant parentheses and a little constant folding): extern const struct lrecord_implementation lrecord_pgconn; inline extern Lisp_PGconn * error_check_pgconn (Lisp_Object obj, const char *file, int line); inline extern Lisp_PGconn * error_check_pgconn (Lisp_Object obj, const char *file, int line) { ((enum Lisp_Type)((unsigned long)obj & ~((1UL << 30 - 1UL) << 2)) == Lisp_Type_Record && ((struct lrecord_header *)obj)->type == (unsigned int)lrecord_type_pgconn) ? (void)0 : assert_failed(file, line, "RECORD_TYPEP (obj, lrecord_type_pgconn)")); return (Lisp_PGconn *)((void *)obj); } Doing "objdump -t postgresql.ell" on the offending postgresql.ell says (in part): postgresql.ell: file format elf32-i386 SYMBOL TABLE: 00000094 l d .hash 00000000 0000070c l d .dynsym 00000000 ... 00000000 *UND* 00000000 error_check_pgconn ... On the other hand, using *any* optimization makes the error_check_pgconn entry disappear altogether; the inlining is complete. Furthermore, a disassembly shows that error_check_pgconn is not called anywhere, so it was compiled away even without optimization ... but an undefined entry for it was inserted into the object file! Can anyone with a gcc 3 handy see if this behavior persists? Thanks, -- Jerry James http://www.ittc.ku.edu/~james/