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* configure.in (isinf, isnan): Detect macro versions as well as
	functions, since C99 specifies them as macros and that's all HP-UX
	has.  Reported by Andreas Voegele.
This commit is contained in:
Kevin Ryde 2004-08-02 00:22:02 +00:00
parent 58f2898942
commit c80bab35fb
1 changed files with 5 additions and 3 deletions
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8
configure.in
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@ -851,10 +851,12 @@ AC_CHECK_FUNCS(asinh acosh atanh copysign finite sincos trunc)
# C99 specifies isinf and isnan as macros.
# HP-UX provides only macros, no functions.
# Glibc 2.3.2 provides both macros and functions.
# glibc 2.3.2 provides both macros and functions.
# IRIX 6.5 and Solaris 8 only provide functions.
#
# We're concerned that some systems may have only functions, the following
# tests are designed to detect both functions and macros.
# The following tests detect isinf and isnan either as functions or as
# macros from <math.h>. Plain AC_CHECK_FUNCS is insufficient, it doesn't
# use <math.h> so doesn't detect on macro-only systems like HP-UX.
#
AC_MSG_CHECKING([for isinf])
AC_LINK_IFELSE(