diff options
| -rw-r--r-- | acinclude.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 8653e9cce..91131273a 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -164,6 +164,25 @@ if test "$ac_cv_type_intmax_t" = yes; then if test "$mpfr_cv_have_intmax_max" = "yes"; then AC_DEFINE(MPFR_HAVE_INTMAX_MAX,1,[Define if you have a working INTMAX_MAX.]) fi + AC_CACHE_CHECK([for working 'j' printf length modifier], + mpfr_cv_have_printf_j, [ + saved_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="$CPPFLAGS -I$srcdir/src" + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <string.h> +#include "mpfr-intmax.h" +]],[[ + char s[64]; + sprintf (s, "%jd %ju", (intmax_t) -17, (uintmax_t) 42); + return strcmp (s, "-17 42") != 0; +]])], + mpfr_cv_have_printf_j=yes, mpfr_cv_have_printf_j=no) + CPPFLAGS="$saved_CPPFLAGS" + ]) + if test "$mpfr_cv_have_printf_j" = "yes"; then + AC_DEFINE(MPFR_HAVE_PRINTF_J,1, + [Define if you have a working 'j' printf length modifier]) + fi fi AC_CHECK_TYPE( [union fpc_csr], |