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| author | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2016-06-06 16:19:21 +0000 |
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| committer | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2016-06-06 16:19:21 +0000 |
| commit | 447f45d74a98367210e108ce7bde60c2d945c840 (patch) | |
| tree | f9147652b2d62065b889ddfb8be5b8df1f94a546 | |
| parent | c4d3cdb70230a418460101fd925a971f8e7192a0 (diff) | |
| download | mpfr-447f45d74a98367210e108ce7bde60c2d945c840.tar.gz | |
[acinclude.m4] When checking if __float128 is available, we now also
check whether C99 constants (in particular the __float128 ones, such
as 0x1.fp+16383q) are supported since this is now required with the
__float128 support.
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@10440 280ebfd0-de03-0410-8827-d642c229c3f4
| -rw-r--r-- | acinclude.m4 | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index be917becb..1fefe840e 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -592,15 +592,17 @@ Please use another compiler or build MPFR without --enable-decimal-float.]) fi]) fi -dnl Check if __float128 is available +dnl Check if __float128 is available. We also require the compiler +dnl to support C99 constants (this prevents the __float128 support +dnl with GCC's -std=c90, but who cares?). if test "$enable_float128" != no; then - AC_MSG_CHECKING(if compiler knows __float128) - AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[__float128 x;]])], + AC_MSG_CHECKING(if compiler knows __float128 with C99 constants) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[__float128 x = 0x1.fp+16383q;]])], [AC_MSG_RESULT(yes) AC_DEFINE([MPFR_WANT_FLOAT128],1,[Build float128 functions])], [AC_MSG_RESULT(no) if test "$enable_float128" = yes; then - AC_MSG_ERROR([compiler doesn't know __float128 + AC_MSG_ERROR([compiler doesn't know __float128 with C99 constants Please use another compiler or build MPFR without --enable-float128.]) fi]) fi |