Bug 61316 - possible bug in math.h when using __USE_ISOC99
possible bug in math.h when using __USE_ISOC99
Status: CLOSED NOTABUG
Product: Red Hat Linux
Classification: Retired
Component: glibc (Show other bugs)
7.2
i686 Linux
medium Severity medium
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Assigned To: Jakub Jelinek
Brian Brock
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Depends On:
Blocks:
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Reported: 2002-03-17 12:32 EST by Need Real Name
Modified: 2016-11-24 10:12 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2002-03-17 12:33:19 EST
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Attachments (Terms of Use)
patch for math.h (906 bytes, patch)
2002-03-17 12:33 EST, Need Real Name
no flags Details | Diff

  None (edit)
Description Need Real Name 2002-03-17 12:32:02 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020311

Description of problem:
When using the __USE_ISOC99 macro with math.h the compiler throws an error.

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


How reproducible:
Always

Steps to Reproduce:
1.write c-program with

#define __USE_ISOC99
#include <math.h>

and compile.

2.compiler complains that

/usr/include/math.h:118:17: #if with no expression
/usr/include/math.h:354:17: #if with no expression
Comment 1 Need Real Name 2002-03-17 12:33:15 EST
Created attachment 48804 [details]
patch for math.h
Comment 2 Jakub Jelinek 2002-03-17 14:10:51 EST
That's no bug. You shouldn't define glibc's internal macros.
If you want ISO C99 functions, use either:
-std=c99
-D_ISOC99_SOURCE
-D__STDC_VERSION__=199901L
(in order of preference).
This is all documented in info libc and /usr/include/features.h too.

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