Re: Building CC++ on Mac OS X

[David Sugar]

The AC_LANG_CPP and AC_LANG_RESTORE options will need to be used in the 
section that tests for this function.  This will make sure they are tested 
with the local machines C++ compiler rather than the C compiler....

On Thursday 30 January 2003 11:41, Ian Gough wrote:
> OK, found the problem.
>
> If I call the small sched_getscheduler test program test.c, then it
> compiles with no errors or warnings. If I call the same program but
> named test.cpp, then gcc complains about an undefined identifier.
>
> The autoconf test creates conftest.c when testing for sched_getscheduler
> (and probably other functions too) and so the compiler never complains
> about missing functions. Using the -std=c99 options to gcc causes
> warnings to be reported on the c files.
>
> [commoncpp2 613] cat test.c
> #include <sched.h>
>
> int main ()
> {
>   int policy;
>   policy = sched_getscheduler(0);
>   return 0;
> }
> [commoncpp2 614] cat test.cpp
> #include <sched.h>
>
> int main ()
> {
>   int policy;
>   policy = sched_getscheduler(0);
>   return 0;
> }
> [commoncpp2 615] gcc -c -g -O2 test.cpp
> test.cpp: In function `int main()':
> test.cpp:6: `sched_getscheduler' undeclared (first use this function)
> test.cpp:6: (Each undeclared identifier is reported only once for each
> function
>    it appears in.)
> [commoncpp2 616] gcc -c -g -O2 test.c
> [commoncpp2 617]
> [commoncpp2 618] gcc -c -g -O2 -std=c99 test.c
> test.c: In function `main':
> test.c:6: warning: implicit declaration of function `sched_getscheduler'
>
> > -----Original Message-----
> > From: Federico Montesino Pouzols
> > [mailto:address@hidden On Behalf Of Federico
> > Montesino Pouzols
> > Sent: Wednesday, January 29, 2003 4:18 PM
> > To: Ian Gough
> > Cc: 'bug-commoncpp'
> > Subject: Re: Building CC++ on Mac OS X
> >
> >
> >
> >     Yes, the semaphore stuff is still pending, I expect to
> > fix it soon. As for the sched_getscheduler issue, it is weird
> > that it is detected, since the test is like this:
> >
> >         AC_TRY_COMPILE(
> >                 [#include <sched.h>],
> >                 [
> >                 int policy;
> >                 policy = sched_getscheduler(0);
> >                 ],
> >                 [AC_DEFINE(HAVE_SCHED_GETSCHEDULER)])
> >
> >     Could you try to compile on your system a simple C
> > program like the one above? It should not compile, but it
> > seems that autoconf is able to succesfully compile it.
> >
> > On Mon, Jan 27, 2003 at 11:10:46AM -0500, Ian Gough wrote:
> > > Grabbed a new CVS snapshot this morning and tried to build
> >
> > after these
> >
> > > changes and I still get compilation failures:
> > >
> > > g++ -DHAVE_CONFIG_H -I. -I. -I../include -I../src
> > > g++ -DCCXX_EXPORT_LIBRARY
> > > -I/usr/local/include -D_GNU_SOURCE -Wall -ansi -pedantic
> >
> > -I../include
> >
> > > -c thread.cpp -MT thread.lo -MD -MP -MF .deps/thread.TPlo
> >
> > -fno-common
> >
> > > -DPIC -o .libs/thread.lo
> > > cc1plus: warning: changing search order for system directory
> > > "/usr/local/include"
> > > cc1plus: warning:   as it has already been specified as a non-system
> > > directory
> > > thread.cpp: In constructor `ost::Thread::Thread(int, long unsigned
> > > int)':
> > > thread.cpp:536: `sched_getscheduler' undeclared (first use this
> > > function)
> > > thread.cpp:536: (Each undeclared identifier is reported
> >
> > only once for
> >
> > > each
> > >    function it appears in.)
> > > thread.cpp:554: `sched_getparam' undeclared (first use this
> >
> > function)
> >
> > > make[1]: *** [thread.lo] Error 1
> > > make: *** [all-recursive] Error 1
> > >
> > > Checking if HAVE_SCHED_GETSCHEDULER is defined in one of the header
> > > files shows that it is defined in config.h for some reason.
> > >
> > > [/var/root/src/revgen/xGrid/ccxx 552] grep -r HAVE_SCHED *
> > > acconfig.h:#undef HAVE_SCHED_GETSCHEDULER acconfig.h:#ifdef
> > > HAVE_SCHED_H config.log:#define HAVE_SCHED_H 1
> > > config.log:#define HAVE_SCHED_GETSCHEDULER 1
> >
> > config.status:${ac_dA}HAVE_SCHED_H${ac_dB}HAVE_SCHED_H${ac_dC}
> > 1${ac_dD}
> >
> > config.status:${ac_dA}HAVE_SCHED_GETSCHEDULER${ac_dB}HAVE_SCHE
>
> D_GETSCHED
>
> > > ULER${ac_dC}1${ac_dD}
> >
> > config.status:${ac_uA}HAVE_SCHED_H${ac_uB}HAVE_SCHED_H${ac_uC}
> > 1${ac_uD}
> >
> > config.status:${ac_uA}HAVE_SCHED_GETSCHEDULER${ac_uB}HAVE_SCHE
>
> D_GETSCHED
>
> > > ULER${ac_uC}1${ac_uD}
> > > configure:#define HAVE_SCHED_GETSCHEDULER 1
> > > include/cc++/config.h:#define HAVE_SCHED_GETSCHEDULER 1
> > > include/cc++/config.h:#define HAVE_SCHED_H 1
> > > include/cc++/config.h:#ifdef HAVE_SCHED_H
> > > include/cc++/config.tmp:#define HAVE_SCHED_GETSCHEDULER 1
> > > include/cc++/config.tmp:#define HAVE_SCHED_H 1
> > > include/cc++/config.tmp:#ifdef HAVE_SCHED_H
> > > include/config.h:#define HAVE_SCHED_GETSCHEDULER 1
> > > include/config.h:#define HAVE_SCHED_H 1
> > > include/config.h:#ifdef HAVE_SCHED_H
> > > include/config.h.in:#undef HAVE_SCHED_GETSCHEDULER
> > > include/config.h.in:#undef HAVE_SCHED_H
> > > include/config.h.in:#ifdef HAVE_SCHED_H
> > > m4/ost_pthread.m4:
> >
> > [AC_DEFINE(HAVE_SCHED_GETSCHEDULER)])
> >
> > > m4/ost_pthread.m4:dnl #undef HAVE_SCHED_GETSCHEDULER
> > > m4/ost_pthread.m4:dnl #ifdef HAVE_SCHED_H
> > > src/thread.cpp:#ifdef HAVE_SCHED_GETSCHEDULER
> > > src/thread.cpp:#endif // ifdef HAVE_SCHED_GETSCHEDULER
> > >
> > > But /usr/include/sched.h shows that there is no
> >
> > sched_getscheduler()
> >
> > > function.
> > >
> > > #ifndef _SCHED_H_
> > > #define _SCHED_H_
> > >
> > > #include <pthread_impl.h>
> > >
> > > /*
> > >  * Scheduling paramters
> > >  */
> > > #ifndef __POSIX_LIB__
> > > struct sched_param { int sched_priority;  char
> > > opaque[__SCHED_PARAM_SIZE__]; }; #endif
> > >
> > > extern int sched_yield(void);
> > > extern int sched_get_priority_min(int);
> > > extern int sched_get_priority_max(int);
> > > #endif /* _SCHED_H_ */
> > >
> > > I grepped for sched_getscheduler and turned up no hits, so I am not
> > > sure why the autoconf system thinks that it exists.
> > >
> > > I then defined __FreeBSD__ to get around this problem, but ran into
> > > another compile problem.
> > >
> > > g++ -DHAVE_CONFIG_H -I. -I. -I../include -D__FreeBSD__ -I../src
> > > -DCCXX_EXPORT_LIBRARY -I/usr/local/include -D_GNU_SOURCE
> >
> > -Wall -ansi
> >
> > > -pedantic -I../include -c semaphore.cpp -MT semaphore.lo
> >
> > -MD -MP -MF
> >
> > > .deps/semaphore.TPlo  -fno-common -DPIC -o .libs/semaphore.lo
> > > cc1plus: warning: changing search order for system directory
> > > "/usr/local/include"
> > > cc1plus: warning:   as it has already been specified as a non-system
> > > directory
> > > /usr/include/sys/sem.h: In destructor `virtual
> > > ost::Semaphore::~Semaphore()':
> > > /usr/include/sys/sem.h:242: too few arguments to function `int
> > > ost::semctl(int,
> > >    int, int, ost::semun)'
> > > semaphore.cpp:100: at this point in file
> > > /usr/include/sys/sem.h: In member function `int
> > > ost::Semaphore::getValue()':
> > > /usr/include/sys/sem.h:242: too few arguments to function `int
> > > ost::semctl(int,
> > >    int, int, ost::semun)'
> > > semaphore.cpp:126: at this point in file
> > > make: *** [semaphore.lo] Error 1
> > >
> > > Mac OS X does not seem to have SYSV semaphores and an
> >
> > incomplete set
> >
> > > of POSIX semaphore functions. It does NOT have sem_init and
> > > sem_destroy, but it does have sem_open and sem_close.
> > >
> > > > -----Original Message-----
> > > > From: Federico Montesino Pouzols
> > > > [mailto:address@hidden On Behalf Of Federico
> > > > Montesino Pouzols
> > > > Sent: Wednesday, January 22, 2003 3:20 AM
> > > > To: Ian Gough
> > > > Cc: 'bug-commoncpp'
> > > > Subject: Re: Building CC++ on Mac OS X
> > > >
> > > >
> > > >
> > > >         Good, I have commited some modifications that should
> > > > fix this issue.
> > > >
> > > > On Tue, Jan 21, 2003 at 09:47:57AM -0500, Ian Gough wrote:
> > > > > >     Um, I have just looked at this and actually there is
> > > >
> > > > already some
> > > >
> > > > > > autoconf stuff. Could you confirm if, in the config.h of
> > > >
> > > > cc++, the
> > > >
> > > > > > symbol HAVE_SOCKLEN_T is undefined?
> > > > >
> > > > > It is commented out. From include/cc++/config.h
> > > > >
> > > > > #define HAVE_INET_ATON 1
> > > > > #define HAVE_INET_SOCKETS 1
> > > > > #define HAVE_UNIX_SOCKETS 1
> > > > > /* #undef HAVE_SOCKLEN_T */
> > > > > /* #undef HAVE_SYS_LIBCSYS_H */
> > > > > /* #undef HAVE_SYS_STREAM_H */
> > > > > /* #undef HAVE_SYS_POLL_H */
> > > > > /* #undef HAVE_POLL_H */
> > >
> > > _______________________________________________
> > > Bug-commoncpp mailing list
> > > address@hidden
> > > http://mail.gnu.org/mailman/listinfo/bug-commoncpp
>
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