Re: fenv-*: Port to Minix

[Bruno Haible]

I wrote:
>   which clearly indicates a problem with the feclearexcept() function.

But when feclearexcept() is buggy, the configure test

  checking whether fesetexceptflag is guaranteed non-trapping...

is not conclusive: It may fail
  - because feclearexcept is buggy,
  - or because fesetexceptflag is trapping,
  - or both.

The way to find out is to configure with gl_cv_func_fesetexceptflag_works1=yes
and look at the unit test results.

In this case, we see a test failure of test-fenv-except-state-2 (it crashes
due to SIGFPE). This proves that on this platform, the answer is: "both".


2023-11-06  Bruno Haible  <bruno@clisp.org>

        fenv-exceptions-state-c99: Update doc regarding Minix.
        * doc/posix-functions/fesetexceptflag.texi: Mention the Minix bug.

diff --git a/doc/posix-functions/fesetexceptflag.texi 
b/doc/posix-functions/fesetexceptflag.texi
index 3523dbb8f8..7a3971a3a5 100644
--- a/doc/posix-functions/fesetexceptflag.texi
+++ b/doc/posix-functions/fesetexceptflag.texi
@@ -17,7 +17,7 @@
 glibc 2.37/i386, glibc 2.37/x86_64,
 @c https://sourceware.org/bugzilla/show_bug.cgi?id=30988
 glibc 2.37/powerpc,
-musl libc, Mac OS X 10.5, mingw, Haiku.
+musl libc, Mac OS X 10.5, Minix 3.3, mingw, Haiku.
 @item
 This function clears too many floating-point exception flags on
 @c https://sourceware.org/bugzilla/show_bug.cgi?id=30998