Bug 81482

Summary: gcc won't compile system headers without warnings
Product: [Retired] Red Hat Linux Reporter: Pat Gunn <pgunn>
Component: gccAssignee: Jakub Jelinek <jakub>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: low Docs Contact:
Priority: medium    
Version: 8.0   
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2003-01-10 14:30:09 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Pat Gunn 2003-01-09 20:41:44 UTC
From Bugzilla Helper:
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Description of problem:
When I use the following gcc flags:
gcc -g -pedantic-errors  -Wall -O -pedantic -Wunused-parameter -Wunused-variable
-Wuninitialized -W -Wshadow -Wpointer-arith -Wbad-function-cast -Wconversion
-Wsign-compare -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations
-Wmissing-format-attribute -Wpadded -Wredundant-decls -Wunreachable-code
-Winline -Wdisabled-optimization

On code that includes math.h on redhat8,
it gives the following error:

In file included from /usr/include/math.h:362,
                 from standard.h:107,
                 from ambs.h:27,
                 from amma.h:15,
                 from amvpv.h:14,
                 from amvpv.c:1:
/usr/include/bits/mathinline.h: In function `fabsf':
/usr/include/bits/mathinline.h:446: passing arg 1 of `__builtin_fabsf' as
`float' rather than `double' due to prototype
make[1]: *** [Linux_x86_glibc-2.2.93_gcc.debug/amvpv.o] Error 1


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


How reproducible:
Always

Steps to Reproduce:
See above

Additional info:

Comment 1 Pat Gunn 2003-01-10 14:19:50 UTC
*** Bug 81483 has been marked as a duplicate of this bug. ***

Comment 2 Jakub Jelinek 2003-01-10 14:30:09 UTC
Either remove -Wconversion, or get rid of -pedantic-errors, you cannot have both.
<math.h> has to declare functions required by the standard to use float
arguments. -Wconversion is there to help playing together with code without
prototypes, but you really cannot use any of the *f or *l functions in them
anyway.