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| author | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 2016-03-02 15:24:12 +0000 |
|---|---|---|
| committer | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 2016-03-02 15:24:12 +0000 |
| commit | a0d6b645176301a4b6dcdfb797167be0811af749 (patch) | |
| tree | 6f021221946cd82dad7d4c2ee2ffd17f9d585c79 /acinclude.m4 | |
| parent | a84797a33288aee708a5b47c4415ddc562caa8a3 (diff) | |
| download | mpfr-a0d6b645176301a4b6dcdfb797167be0811af749.tar.gz | |
autodetect support for decimal floats (as suggested in revision 10179)
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@10185 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 26102b8c6..31277b1a3 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -518,18 +518,14 @@ then fi dnl Check if decimal floats are available -if test "$enable_decimal_float" = yes; then - AC_DEFINE([MPFR_WANT_DECIMAL_FLOATS],1, - [Build decimal float functions]) +if test "$enable_decimal_float" != no; then AC_MSG_CHECKING(if compiler knows _Decimal64) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[_Decimal64 x;]])], - [AC_MSG_RESULT(yes)], - [AC_MSG_RESULT(no) - AC_MSG_ERROR([Compiler doesn't know _Decimal64 (ISO/IEC TR 24732). - Please use another compiler or build MPFR with --disable-decimal-float.])] - ) - AC_MSG_CHECKING(decimal float format) - AC_RUN_IFELSE([AC_LANG_PROGRAM([[ + [AC_MSG_RESULT(yes) + AC_DEFINE([MPFR_WANT_DECIMAL_FLOATS],1, + [Build decimal float functions]) + AC_MSG_CHECKING(decimal float format) + AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h> ]], [[ volatile _Decimal64 x = 1; @@ -542,13 +538,21 @@ return y.d == 0.14894469406741037E-123 ? 0 : AC_DEFINE([DPD_FORMAT],1,[])], [case "$?" in 1) AC_MSG_RESULT(BID) ;; - 2) AC_MSG_FAILURE(neither DPD nor BID) ;; - 3) AC_MSG_FAILURE([_Decimal64 support is broken. -Please use another compiler or build MPFR with --disable-decimal-float.]) ;; + 2) AC_MSG_RESULT(neither DPD nor BID) + if test "$enable_decimal_float" = yes; then + AC_MSG_ERROR([unsupported decimal float format. +Please build MPFR with --disable-decimal-float.]) + fi ;; *) AC_MSG_FAILURE(internal error) ;; esac], [AC_MSG_RESULT(assuming DPD) AC_DEFINE([DPD_FORMAT],1,[])]) + ], + [AC_MSG_RESULT(no) + if test "$enable_decimal_float" = yes; then + AC_MSG_ERROR([Compiler doesn't know _Decimal64 (ISO/IEC TR 24732). +Please use another compiler or build MPFR with --disable-decimal-float.]) + fi]) fi dnl Check if Static Assertions are supported. |