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Make proper autoconf test for availability of posix nan function instead of fudging with the NAN macro.

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darcs-hash:20090202232049-ac50b-0176955677ff39fdd05eeefa20dca883863c34e6.gz
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axel 2009-02-03 09:20:49 +10:00
parent 72025a6a38
commit 35258bf1fb
4 changed files with 13 additions and 4 deletions
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2
common.c
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@ -1815,7 +1815,7 @@ double timef()
if( time_res )
{
return NAN;
return nan(0);
}
return (double)tv.tv_sec + 0.000001*tv.tv_usec;

1
configure.ac
View file

@ -505,6 +505,7 @@ LIBS=""
AC_SEARCH_LIBS( connect, socket, , [AC_MSG_ERROR([Cannot find the socket library, needed to build this package.] )] )
AC_SEARCH_LIBS( nanosleep, rt, , [AC_MSG_ERROR([Cannot find the rt library, needed to build this package.] )] )
AC_SEARCH_LIBS( setupterm, [ncurses curses], , [AC_MSG_ERROR([Could not find a curses implementation, needed to build fish])] )
AC_SEARCH_LIBS( [nan], [m], [AC_DEFINE( [HAVE_NAN], [1], [Define to 1 if you have the nan function])] )
LIBS_SHARED=$LIBS
LIBS=$LIBS_COMMON

9
fallback.c
View file

@ -1183,5 +1183,12 @@ long sysconf(int name)
return -1;
}
#endif
#ifndef HAVE_NAN
double nan(char *tagp)
{
return 0.0/0.0;
}
#endif

5
fallback.h
View file

@ -469,8 +469,9 @@ long sysconf(int name);
#endif
#ifndef NAN
#define NAN (0.0/0.0)
#ifndef HAVE_NAN
double nan(char *tagp);
#endif
#endif