diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/configure.in b/configure.in index 1026c855bf2..e788419eb4f 100644 --- a/configure.in +++ b/configure.in @@ -2006,12 +2006,20 @@ case "$target" in ;; esac -# isinf() could be a function or a macro (HPUX) -AC_MSG_CHECKING(for isinf with <math.h>) +# Check that isinf() is available in math.h and can be used in both C and C++ +# code +AC_MSG_CHECKING(for isinf in <math.h>) AC_TRY_LINK([#include <math.h>], [float f = 0.0; int r = isinf(f); return r], - AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_ISINF, [1], [isinf() macro or function]), - AC_MSG_RESULT(no)) + AC_MSG_RESULT(yes) + AC_MSG_CHECKING(whether isinf() can be used in C++ code) + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_LINK([#include <math.h>], [float f = 0.0; int r = isinf(f); return r], + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_ISINF, [1], [isinf() macro or function]), + AC_MSG_RESULT(no)) + AC_LANG_RESTORE, + AC_MSG_RESULT(no)) CFLAGS="$ORG_CFLAGS" |