Re: [HACKERS] Off-topic: autoconf guru - Mailing list pgsql-hackers

From Patrick van Kleef
Subject Re: [HACKERS] Off-topic: autoconf guru
Date
Msg-id 199907291459.QAA10044@roadrunner.pvk.openlinksw.com
Whole thread Raw
In response to Off-topic: autoconf guru  (Dmitry Samersoff <dms@wplus.net>)
Responses Re: [HACKERS] Off-topic: autoconf guru
List pgsql-hackers
Hi Dmitry,

Autoconf can do this out of the box. With the macros AC_LANG_C and 
AC_LANG_CPLUSPLUS you can switch between C and C++ compiler mode. Here 
is a small example based on the snippet you provided:

AC_PREREQ(2.12)AC_INIT(configure.in)
##  Check which C and C++ compiler to use#AC_PROG_CCAC_PROG_CXX
##  The following checks are done with the C compiler#AC_LANG_C
AC_CHECK_FUNC(accept)

##  Now switch over to the C++ compiler for the next test#AC_LANG_CPLUSPLUS
AC_MSG_CHECKING(socket size type)AC_TRY_COMPILE([#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>],[int
a= accept(1, (struct sockaddr *) 0, (int *) 0);],[AC_DEFINE(SOCKET_SIZE_TYPE, int)
AC_MSG_RESULT(int)],[AC_DEFINE(SOCKET_SIZE_TYPE,size_t) AC_MSG_RESULT(size_t)])
 
##  Switch back to C mode again#AC_LANG_C
AC_OUTPUT()    


Best regards,

Patrick
-- 
Patrick van Kleef          
pkleef@roady.xs4all.nl




pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: [HACKERS] Max Query length string
Next
From: Tom Lane
Date:
Subject: Re: [HACKERS] Off-topic: autoconf guru