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Assume that we have isinf().

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Windows has this, and so do all other live platforms according to the
buildfarm, so remove the configure probe and src/port/ substitution.

This also lets us get rid of some configure probes that existed only
to support src/port/isinf.c.  I kept the port.h hack to force using
__builtin_isinf() on clang, though.

This is part of a series of commits to get rid of no-longer-relevant
configure checks and dead src/port/ code.  I'm committing them separately
to make it easier to back out individual changes if they prove less
portable than I expect.

Discussion: https://postgr.es/m/15379.1582221614@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2020-02-21 13:18:27 -05:00
parent 799d22461a
commit 7fde892bc1
6 changed files with 1 additions and 192 deletions
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21
configure.in
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@ -1280,9 +1280,7 @@ AC_CHECK_HEADERS(m4_normalize([
atomic.h
copyfile.h
execinfo.h
fp_class.h
getopt.h
ieeefp.h
ifaddrs.h
langinfo.h
mbarrier.h
@ -1699,25 +1697,6 @@ if test "$pgac_cv_var_PS_STRINGS" = yes ; then
AC_DEFINE([HAVE_PS_STRINGS], 1, [Define to 1 if the PS_STRINGS thing exists.])
fi
dnl Cannot use AC_CHECK_FUNC because isinf may be a macro
AC_CACHE_CHECK([for isinf], ac_cv_func_isinf,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <math.h>
double glob_double;
],
[return isinf(glob_double) ? 0 : 1;])],
[ac_cv_func_isinf=yes],
[ac_cv_func_isinf=no])])
if test $ac_cv_func_isinf = yes ; then
AC_DEFINE(HAVE_ISINF, 1, [Define to 1 if you have isinf().])
else
AC_LIBOBJ(isinf)
# Look for a way to implement a substitute for isinf()
AC_CHECK_FUNCS([fpclass fp_class fp_class_d class], [break])
fi
AC_REPLACE_FUNCS(m4_normalize([
dlopen
explicit_bzero