GCC 4.3 prints an unsuppressable warning about any use of a static inline
function or static const data in a non-static inline function.
While this is useful for non-const static data, and possibly for non-inlined
static functions, it is extremely annoying for static inline functions or
static const objects.
On MacOS X Leopard (Darwin 9), the following program prints warnings. (Note
that htons() has a static inline declaration in the system header files. This
problem makes extern inline functions essentially useless, since they cannot
use system inline functions without warnings.)
#include <arpa/inet.h>
#include <stdbool.h>
extern inline short ntohs_wrapper(short x)
{
return ntohs(x);
}
extern inline bool less_than_threshhold(int val)
{
static const int threshhold = 100;
return val < threshhold;
}
[EMAIL PROTECTED] ~]$ ~/FSF-GCC/bin/gcc -c inline-test.c
inline-test.c: In function 'ntohs_wrapper':
inline-test.c:6: warning: '_OSSwapInt16' is static but used in inline function
'ntohs_wrapper' which is not static
inline-test.c: In function 'less_than_threshhold':
inline-test.c:12: warning: 'threshhold' is static but declared in inline
function 'less_than_threshhold' which is not static
inline-test.c:13: warning: 'threshhold' is static but used in inline function
'less_than_threshhold' which is not static
[EMAIL PROTECTED] ~]$ ~/FSF-GCC/bin/gcc -c -v inline-test.c
Using built-in specs.
Target: i386-apple-darwin9.0.0
Configured with: ../gcc/configure --prefix=/Users/jonathan/FSF-GCC/
--with-gmp=/Users/jonathan/FSF-GCC/ --with-mpfr=/Users/jonathan/FSF-GCC/
--enable-lanaguages=c,c++,fortran,objc,obj-c++ --enable-checking=release
--with-tune=generic
Thread model: posix
gcc version 4.3.0 20071105 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.0' '-c' '-v' '-mtune=generic'
/Users/jonathan/FSF-GCC/bin/../libexec/gcc/i386-apple-darwin9.0.0/4.3.0/cc1
-quiet -v -iprefix
/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/
-D__DYNAMIC__ inline-test.c -fPIC -quiet -dumpbase inline-test.c
-mmacosx-version-min=10.5.0 -mtune=generic -auxbase inline-test -version -o
/var/tmp//ccJzAq19.s
ignoring nonexistent directory
"/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/../../../../i386-apple-darwin9.0.0/include"
ignoring nonexistent directory "/usr/local/include"
ignoring duplicate directory
"/Users/jonathan/FSF-GCC/bin/../lib/gcc/../../lib/gcc/i386-apple-darwin9.0.0/4.3.0/include"
ignoring duplicate directory
"/Users/jonathan/FSF-GCC/bin/../lib/gcc/../../lib/gcc/i386-apple-darwin9.0.0/4.3.0/include-fixed"
ignoring nonexistent directory
"/Users/jonathan/FSF-GCC/bin/../lib/gcc/../../lib/gcc/i386-apple-darwin9.0.0/4.3.0/../../../../i386-apple-darwin9.0.0/include"
#include "..." search starts here:
#include <...> search starts here:
/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/include
/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/include-fixed
/Users/jonathan/FSF-GCC/bin/../lib/gcc/../../include
/usr/include
/System/Library/Frameworks
/Library/Frameworks
End of search list.
GNU C (GCC) version 4.3.0 20071105 (experimental) (i386-apple-darwin9.0.0)
compiled by GNU C version 4.3.0 20071105 (experimental), GMP version
4.2.2, MPFR version 2.3.0.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4eaa8600939e59258d37cac385804206
inline-test.c: In function 'ntohs_wrapper':
inline-test.c:6: warning: '_OSSwapInt16' is static but used in inline function
'ntohs_wrapper' which is not static
inline-test.c: In function 'less_than_threshhold':
inline-test.c:12: warning: 'threshhold' is static but declared in inline
function 'less_than_threshhold' which is not static
inline-test.c:13: warning: 'threshhold' is static but used in inline function
'less_than_threshhold' which is not static
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.0' '-c' '-v' '-mtune=generic'
as -arch i386 -force_cpusubtype_ALL -o inline-test.o /var/tmp//ccJzAq19.s
COMPILER_PATH=/Users/jonathan/FSF-GCC/bin/../libexec/gcc/i386-apple-darwin9.0.0/4.3.0/:/Users/jonathan/FSF-GCC/bin/../libexec/gcc/
LIBRARY_PATH=/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/:/Users/jonathan/FSF-GCC/bin/../lib/gcc/:/Users/jonathan/FSF-GCC/bin/../lib/gcc/i386-apple-darwin9.0.0/4.3.0/../../../:/usr/lib/
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.0' '-c' '-v' '-mtune=generic'
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.0' '-c' '-v' '-mtune=generic'
This problem appears to have been introduced by Geoffrey Keating in Subversion
Revision 118356, a fix for PR 11377.
GCC 4.2 does not have this problem.
--
Summary: GCC pedwarns about use of static inline functions or
static const data in extern inline functions
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: lennox at cs dot columbia dot edu
GCC build triplet: i686-apple-darwin9
GCC host triplet: i686-apple-darwin9
GCC target triplet: i686-apple-darwin9
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34000
