Check for fenv.h and ieeefp.h functions only if the header is there.

Makes it easier to disable these and test our own version by just
setting ac_cv_header_fenv_h=no ac_cv_header_ieeefp_h=no.

(cherry picked from commit 28ab7305af256228eaf9c65a56e7539826045fb1)

diff --git a/src/microcode/configure.ac b/src/microcode/configure.ac
index 0f7ba394357522b2c8b5106cffa66dcf709f0780..80157a43755dbef653f42cee8f7edf2c3e5d29b1 100644 (file)
--- a/src/microcode/configure.ac
+++ b/src/microcode/configure.ac
@@ -541,6 +541,14 @@ define([SCM_INC_FENV],
 if test "x$ac_cv_header_fenv_h" = "xyes"; then
   AC_CHECK_TYPES([fenv_t], [], [], [SCM_INC_FENV])
   AC_CHECK_TYPES([fexcept_t], [], [], [SCM_INC_FENV])
+  AC_CHECK_FUNCS([feclearexcept fedisableexcept feenableexcept])
+  AC_CHECK_FUNCS([fegetenv fegetexcept fegetexceptflag fegetround feholdexcept])
+  AC_CHECK_FUNCS([feraiseexcept fesetenv fesetexceptflag fesetround])
+  AC_CHECK_FUNCS([fetestexcept feupdateenv])
+fi
+
+if test "x$ac_cv_header_ieeefp_h" = "xyes"; then
+  AC_CHECK_TYPES([fpgetround fpsetround])
 fi
 
 AC_CHECK_SIZEOF([time_t])
@@ -686,11 +694,9 @@ AC_FUNC_WAIT3
 AC_CHECK_FUNCS([clock_gettime closefrom ctermid])
 AC_CHECK_FUNCS([dup2])
 AC_CHECK_FUNCS([expm1])
-AC_CHECK_FUNCS([fcntl fdatasync feclearexcept fedisableexcept feenableexcept])
-AC_CHECK_FUNCS([fegetenv fegetexcept fegetexceptflag fegetround feholdexcept])
-AC_CHECK_FUNCS([feraiseexcept fesetenv fesetexceptflag fesetround])
-AC_CHECK_FUNCS([fetestexcept feupdateenv floor fmod fpathconf fpgetround])
-AC_CHECK_FUNCS([fpsetround frexp fsync fsync_range ftruncate])
+AC_CHECK_FUNCS([fcntl fdatasync])
+AC_CHECK_FUNCS([floor fmod fpathconf])
+AC_CHECK_FUNCS([frexp fsync fsync_range ftruncate])
 AC_CHECK_FUNCS([getcwd gethostbyname gethostname getlogin getpagesize getpgrp])
 AC_CHECK_FUNCS([getpt gettimeofday getwd grantpt])
 AC_CHECK_FUNCS([kill])