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configure.ac: detect feenableexcept with AC_CHECK_DECL

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On Android feenableexcept is only declared as a macro, but not
    present as a function.
This commit is contained in:
Marius Gerbershagen 2019-01-12 22:49:13 +01:00
parent d0cf3c86e4
commit ca4eabea15
2 changed files with 54 additions and 6 deletions
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55
src/configure vendored
View file

@ -2198,6 +2198,52 @@ $as_echo "$ac_res" >&6; }
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
} # ac_fn_c_find_uintX_t
# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
# ---------------------------------------------
# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
# accordingly.
ac_fn_c_check_decl ()
{
as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
as_decl_name=`echo $2|sed 's/ *(.*//'`
as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5
$as_echo_n "checking whether $as_decl_name is declared... " >&6; }
if eval \${$3+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
$4
int
main ()
{
#ifndef $as_decl_name
#ifdef __cplusplus
(void) $as_decl_use;
#else
(void) $as_decl_name;
#endif
#endif
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
eval "$3=yes"
else
eval "$3=no"
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
eval ac_res=\$$3
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
$as_echo "$ac_res" >&6; }
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
} # ac_fn_c_check_decl
cat >config.log <<_ACEOF
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.
@ -9319,14 +9365,15 @@ _ACEOF
fi
done
ac_fn_c_check_func "$LINENO" "feenableexcept" "ac_cv_func_feenableexcept"
if test "x$ac_cv_func_feenableexcept" = xyes; then :
ac_fn_c_check_decl "$LINENO" "feenableexcept" "ac_cv_have_decl_feenableexcept" "#include <fenv.h>
"
if test "x$ac_cv_have_decl_feenableexcept" = xyes; then :
$as_echo "#define HAVE_FEENABLEEXCEPT /**/" >>confdefs.h
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: feenableexcept not provided: disabling floating point exceptions" >&5
$as_echo "$as_me: WARNING: feenableexcept not provided: disabling floating point exceptions" >&2;}
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: feenableexcept not declared: disabling floating point exceptions" >&5
$as_echo "$as_me: WARNING: feenableexcept not declared: disabling floating point exceptions" >&2;}
fi

5
src/configure.ac
View file

@ -720,9 +720,10 @@ dnl !!! end autoscan
AC_CHECK_FUNCS( [nanosleep alarm times select setenv putenv] \
[lstat mkstemp sigprocmask isatty tzset] \
[gettimeofday getrusage] )
AC_CHECK_FUNC([feenableexcept],
AC_CHECK_DECL([feenableexcept],
[AC_DEFINE(HAVE_FEENABLEEXCEPT,[],[feenableexcept is available])],
[AC_MSG_WARN(feenableexcept not provided: disabling floating point exceptions)])
[AC_MSG_WARN(feenableexcept not declared: disabling floating point exceptions)],
[#include <fenv.h>])
AC_CHECK_FUNCS( [expf logf sqrtf cosf sinf tanf sinhf coshf tanhf] \
[floorf ceilf fabsf frexpf ldexpf log1p log1pf log1pl] \