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Bug 154084 - gcc -E -o silently stops output when line exceeds 4k
Summary: gcc -E -o silently stops output when line exceeds 4k
Alias: None
Product: Fedora
Classification: Fedora
Component: gcc
Version: 3
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Jakub Jelinek
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-04-07 05:51 UTC by D. Hugh Redelmeier
Modified: 2007-11-30 22:11 UTC (History)
0 users

Fixed In Version: gcc-3.4.3-22.fc3
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-04-07 13:09:01 UTC

Attachments (Terms of Use)
source for gcc-E-truncation.c (deleted)
2005-04-07 05:54 UTC, D. Hugh Redelmeier
no flags Details

Description D. Hugh Redelmeier 2005-04-07 05:51:05 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050323 Firefox/1.0.2 Fedora/1.0.2-1.3.1

Description of problem:
-E tells gcc to output the result of preprocessing, without compiling it.

When gcc -E -o generates a line longer than 4k, it stops output in the middle.  No other lines are produced.  The exit code is 0 (happy).

Truncation is bad.
Truncation without diagnostic is worse.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. gcc -E -o gcc-E-truncation.E gcc-E-truncation.c 
2. echo $?
3. examine the last line of output.
(see attached file gcc-E-truncation.c)

Actual Results:  Exit code was 0.
The output stopped at 4k into the long line
No diagnostic

Expected Results:  proper output produced

Additional info:

Comment 1 D. Hugh Redelmeier 2005-04-07 05:54:51 UTC
Created attachment 112800 [details]
source for gcc-E-truncation.c

the file contains comments describing how to preprocess the program.  This step
fails with truncation.

Comment 2 Jakub Jelinek 2005-04-07 13:09:01 UTC
Can't reproduce with current FC3 testing update.
gcc -E -o gcc-E-truncation.E gcc-E-truncation.c; gcc -E gcc-E-truncation.c | wc;
wc gcc-E-truncation.E
     18    1368   12279
   18  1368 12279 gcc-E-truncation.E

Comment 3 D. Hugh Redelmeier 2005-04-07 15:29:16 UTC
Appology: it turns out that a tool I was using to examine the output had this
bad behaviour.  gcc itself seems to be fine.

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