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* c/10855: extern __inline__ does not compile
@ 2003-05-19 10:06 i-sys
  0 siblings, 0 replies; only message in thread
From: i-sys @ 2003-05-19 10:06 UTC (permalink / raw)
  To: gcc-gnats


>Number:         10855
>Category:       c
>Synopsis:       extern __inline__ does not compile
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 19 10:06:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     i-sys@gmx.net
>Release:        gcc-3.3
>Organization:
>Environment:
Debian GNU/Linux Sid
>Description:
Hello,

It appears that gcc-3.3 is unable to compile extern __inline__ functions, and thus the Linux kernel. I found this bug as I tried to compile Linux 2.4.21-rc2, where the linker failed to find the extern __inline__ rtnetlink_rcv_skb(struct sk_buff) funktion in /usr/src/linux/net/core/rtnetlink.c, although it was implemented in the same module. I then wrote a little test program which causes gcc to fail:

extern __inline__ void print_hello() { printf("Hello, World!\n"); }
main() { print_hello(); }

gcc then writes this to stderr:

/tmp/ccX11xji.o(.text+0x11): In function `main':
: undefined reference to `print_hello'
collect2: ld returned 1 exit status

Surprisingly it worked once I declared print_hello either extern or __inline__, only the combination did not work. 

I attached a tarball including the test.c, test.i, test.s, test.o and test.stderr.txt, the output that gcc -v --save-temps test.c wrote to stderr.

I hope this helps.

Florian Knauf
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
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