Bug 154084 - gcc -E -o silently stops output when line exceeds 4k
gcc -E -o silently stops output when line exceeds 4k
Product: Fedora
Classification: Fedora
Component: gcc (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Jakub Jelinek
Depends On:
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Reported: 2005-04-07 01:51 EDT by D. Hugh Redelmeier
Modified: 2007-11-30 17:11 EST (History)
0 users

See Also:
Fixed In Version: gcc-3.4.3-22.fc3
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-04-07 09:09:01 EDT
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Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
source for gcc-E-truncation.c (1.09 KB, text/plain)
2005-04-07 01:54 EDT, D. Hugh Redelmeier
no flags Details

  None (edit)
Description D. Hugh Redelmeier 2005-04-07 01:51:05 EDT
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 01:54:51 EDT
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 09:09:01 EDT
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 11:29:16 EDT
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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