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(read_makefile): Check for a shell command first, and then strip leading

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tabs before further checking if it's not a shell command line.
This commit is contained in:
Roland McGrath 1994-06-24 10:34:03 +00:00
parent 6348923799
commit 4a8a7637f3
1 changed files with 53 additions and 42 deletions
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95
read.c
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@ -360,6 +360,47 @@ read_makefile (filename, flags)
lineno += nlines;
nlines = readline (&lb, infile, filename, lineno);
/* Check for a shell command line first.
If it is not one, we can stop treating tab specially. */
if (lb.buffer[0] == '\t')
{
/* This line is a probably shell command. */
unsigned int len;
if (no_targets)
/* Ignore the commands in a rule with no targets. */
continue;
/* If there is no preceding rule line, don't treat this line
as a command, even though it begins with a tab character.
SunOS 4 make appears to behave this way. */
if (filenames != 0)
{
if (ignoring)
/* Yep, this is a shell command, and we don't care. */
continue;
/* Append this command line to the line being accumulated. */
p = lb.buffer;
if (commands_idx == 0)
commands_started = lineno;
len = strlen (p);
if (len + 1 + commands_idx > commands_len)
{
commands_len = (len + 1 + commands_idx) * 2;
commands = (char *) xrealloc (commands, commands_len);
}
bcopy (p, &commands[commands_idx], len);
commands_idx += len;
commands[commands_idx++] = '\n';
continue;
}
}
/* This line is not a shell command line. Don't worry about tabs. */
if (collapsed_length < lb.size)
{
collapsed_length = lb.size;
@ -372,17 +413,20 @@ read_makefile (filename, flags)
collapse_continuations (collapsed);
remove_comments (collapsed);
p = collapsed;
while (isspace (*p) && *p != '\t')
++p;
/* We cannot consider a line containing just a tab to be empty
because it might constitute an empty command for a target. */
if (*p == '\0' && lb.buffer[0] != '\t')
continue;
/* strncmp is first to avoid dereferencing out into space. */
#define word1eq(s, l) (!strncmp (s, p, l) \
&& (p[l] == '\0' || isblank (p[l])))
p = collapsed;
while (isspace (*p))
++p;
if (*p == '\0')
/* This line is completely empty. */
continue;
/* We must first check for conditional and `define' directives before
ignoring anything, since they control what we will do with
following lines. */
if (!in_ignored_define
&& (word1eq ("ifdef", 5) || word1eq ("ifndef", 6)
|| word1eq ("ifeq", 4) || word1eq ("ifneq", 5)
@ -458,40 +502,7 @@ read_makefile (filename, flags)
/* Ignore the line. We continue here so conditionals
can appear in the middle of a rule. */
continue;
else if (lb.buffer[0] == '\t')
{
/* This line is a shell command. */
unsigned int len;
if (no_targets)
/* Ignore the commands in a rule with no targets. */
continue;
/* If there is no preceding rule line, don't treat this line
as a command, even though it begins with a tab character.
SunOS 4 make appears to behave this way. */
if (filenames != 0)
{
/* Append this command line to the line being accumulated. */
p = lb.buffer;
if (commands_idx == 0)
commands_started = lineno;
len = strlen (p);
if (len + 1 + commands_idx > commands_len)
{
commands_len = (len + 1 + commands_idx) * 2;
commands = (char *) xrealloc (commands, commands_len);
}
bcopy (p, &commands[commands_idx], len);
commands_idx += len;
commands[commands_idx++] = '\n';
continue;
}
}
if (word1eq ("export", 6))
else if (word1eq ("export", 6))
{
struct variable *v;
p2 = next_token (p + 6);