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Add "--broken-undeftoken-init" option. This makes Bison 1.28 bug compatable

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with version 1.25.

Bison 1.28 fixed a bug in the initialization of the `undefined' symbol
table entry.  Unfortunately something about the way we are compiling
egcs-1.1.2's cc1plus breaks with this bugfix.

"--broken-undeftoken-init" is needed when compiling cc1plus.  Otherwise
/usr/libexec/cc1plus cannot compile libgcc.
This commit is contained in:
David E. O'Brien 1999-08-14 22:15:21 +00:00
parent a98373454d
commit a9aea92dee
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=49801
2 changed files with 7 additions and 1 deletions
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2
contrib/bison/getargs.c
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@ -31,6 +31,7 @@ int nolinesflag;
int noparserflag = 0;
int toknumflag = 0;
int rawtoknumflag = 0;
int broken_undeftoken_init;
char *spec_name_prefix; /* for -p. */
char *spec_file_prefix; /* for -b. */
extern int fixed_outfiles;/* for -y */
@ -44,6 +45,7 @@ extern void warns PARAMS((char *, char *)); /* main.c */
struct option longopts[] =
{
{"broken-undeftoken-init", 0, &broken_undeftoken_init, 1},
{"debug", 0, &debugflag, 1},
{"defines", 0, &definesflag, 1},
{"file-prefix", 1, 0, 'b'},

6
contrib/bison/reader.c
View file

@ -44,6 +44,7 @@ The entry point is reader(). */
int rline_allocated;
extern char *program_name;
extern int broken_undeftoken_init;
extern int definesflag;
extern int nolinesflag;
extern int noparserflag;
@ -199,7 +200,10 @@ reader (void)
/* it is always token number 2. */
undeftoken = getsym("$undefined.");
undeftoken->class = STOKEN;
undeftoken->user_token_number = 2;
/* XXX ``broken_undeftoken_init'' makes Bison 1.28 bug-compatable
with Bison 1.25. FreeBSD depends on this behavior when compiling
EGCS-1.1.2's cc1plus. */
undeftoken->user_token_number = broken_undeftoken_init ? 0 : 2;
/* Read the declaration section. Copy %{ ... %} groups to ftable and fdefines file.
Also notice any %token, %left, etc. found there. */
if (noparserflag)