libc and header file problems

I discovered some problems with the Minix C library and header files while
porting curl to Minix 3.1.2 using ACK on a 32-bit x86 system. A few
functions found in libc were missing prototypes in header files,
namely recv, send, and strtok_r. A few network functions were found
in the header file <net/gen/inet.h>, which is a bit of an odd place;
the "standard" location on other systems (Linux, FreeBSD, Solaris)
is <arpa/inet.h>.

Finally, sigsetjmp is broken. Any attempt to use it will fail to link
with an undefined symbol __longjmp. Looking through the source shows
that, sure enough, _longjmp is called from siglongjmp but it's never
defined. Here is a test program to demonstrate this problem:

/*
* This program fails to link on Minix 3.1.2 when compiled with ACK with:
* cc -D_POSIX_SOURCE=1 -o jmptst jmptst.c
* Undefined:
* __longjmp
*/
#include <setjmp.h>
#include <stdio.h>
int main(void)
{
sigjmp_buf j;
if (sigsetjmp(j, 0)) {
printf("Got jump\n");
return 0;
}
siglongjmp(j,1);
printf("Error!\n");
return 1;
}

The current daily builds of curl will now compile with gcc on Minix (as
should 7.16.0 when it's released), but until the _longjmp problem is
fixed, it won't on ACK.
[color=blue][color=green][color=darkred]
>>> Dan[/color][/color][/color]
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In article <efd24p$qe9@ponderosa.fch.wimsey.bc.ca>,
Dan Fandrich <dan@coneharvesters.com> wrote:[color=blue]
>I discovered some problems with the Minix C library and header files while
>porting curl to Minix 3.1.2 using ACK on a 32-bit x86 system. A few
>functions found in libc were missing prototypes in header files,
>namely recv, send, and strtok_r. A few network functions were found
>in the header file <net/gen/inet.h>, which is a bit of an odd place;
>the "standard" location on other systems (Linux, FreeBSD, Solaris)
>is <arpa/inet.h>.[/color]

The Open Group claims that the prototypes for send() and recv() have to be
in <sys/socket.h>

The current version of Minix 3 (in CVS) has the prototypes and some fixes
for send.

There are many functions missing, and strtok_r is probably one of them.
Port a BSD version and submit it as patch.
[color=blue]
>Finally, sigsetjmp is broken. Any attempt to use it will fail to link
>with an undefined symbol __longjmp. Looking through the source shows
>that, sure enough, _longjmp is called from siglongjmp but it's never
>defined. Here is a test program to demonstrate this problem:[/color]

I think this is also supposed to be fixed in the current version of Minix 3.
For now, just define a function _longjmp somewhere that calls longjmp.
[color=blue]
>The current daily builds of curl will now compile with gcc on Minix (as
>should 7.16.0 when it's released), but until the _longjmp problem is
>fixed, it won't on ACK.[/color]

Setjmp for gcc is broken in 3.1.2a.


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