Re: [HACKERS] Off-topic: autoconf guru
От | Patrick van Kleef |
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Тема | Re: [HACKERS] Off-topic: autoconf guru |
Дата | |
Msg-id | 199907291459.QAA10044@roadrunner.pvk.openlinksw.com обсуждение исходный текст |
Ответ на | Off-topic: autoconf guru (Dmitry Samersoff <dms@wplus.net>) |
Ответы |
Re: [HACKERS] Off-topic: autoconf guru
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Список | 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
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