[Bug c/34697] New: gcc -std=gnu99 emits global symbol for extern inline function declarations

[Bug c/34697] New: gcc -std=gnu99 emits global symbol for extern inline function declarations

[dan at math dot uiuc dot edu]

Here's the source code:

   extern inline void f() {}
   int main () {}

Compile with

    gcc -c -std=gnu99 filename.c

Use nm filename.o to see that a global symbol f has been declared, but it
shouldn't be.

This prevents libgmp from being usable under Mac OS 10.5.

% uname -a
Darwin indigo.local 9.1.0 Darwin Kernel Version 9.1.0: Wed Oct 31 17:46:22 PDT
2007; root:xnu-1228.0.2~1/RELEASE_I386 i386


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           Summary: gcc -std=gnu99 emits global symbol for extern inline
                    function declarations
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dan at math dot uiuc 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=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2008-01-06 23:25 -------
Well extern inline for 4.3.0 and before in C99 mode was the GNU 89 extern
inline and not the C99 extern inline.  This was fixed for 4.3.0.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[dan at math dot uiuc dot edu]

------- Comment #2 from dan at math dot uiuc dot edu  2008-01-07 00:20 -------
Well, if you were right, then gnu99 and gnu89 would have the same behavior, but
they don't:

indigo% gcc -c -std=gnu99 foo.c
indigo% nm foo.o
00000000 T _f
00000008 T _main
indigo% gcc -c -std=gnu89 foo.c
indigo% nm foo.o
00000000 T _main
indigo% gcc -v
Using built-in specs.
Target: i686-apple-darwin9
Configured with: /var/tmp/gcc/gcc-5465~16/src/configure --disable-checking
-enable-werror --prefix=/usr --mandir=/share/man
--enable-languages=c,objc,c++,obj-c++
--program-transform-name=/^[cg][^.-]*$/s/$/-4.0/
--with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib
--build=i686-apple-darwin9 --with-arch=apple --with-tune=generic
--host=i686-apple-darwin9 --target=i686-apple-darwin9
Thread model: posix
gcc version 4.0.1 (Apple Inc. build 5465)


-- 

dan at math dot uiuc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|FIXED                       |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[dan at math dot uiuc dot edu]

------- Comment #3 from dan at math dot uiuc dot edu  2008-01-07 00:21 -------
PS: it could be a bug inserted by Apple...


-- 

dan at math dot uiuc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dan at math dot uiuc dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2008-01-07 00:28 -------
> Use nm filename.o to see that a global symbol f has been declared, but it
>shouldn't be.

Yes it should, that is what it should do for C99/GNU99. 

>PS: it could be a bug inserted by Apple...

Well no, Apple just fixed extern inline for C99 mode for their 4.0.x compiler.

So GMP has issues with its source not being C99 compatible even though it uses
-std=gnu99 .


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[dan at math dot uiuc dot edu]

------- Comment #5 from dan at math dot uiuc dot edu  2008-01-07 01:43 -------
Thank you!


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697

[Bug c/34697] gcc -std=gnu99 emits global symbol for extern inline function declarations

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2008-01-07 10:04 -------
Update your gmp, this was fixed in 4.2.2.

> Well, if you were right, then gnu99 and gnu89 would have the same behavior, but
> they don't:

gnu99 behaves like c99.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34697