Mercurial > gnulib
view m4/cbrtl.m4 @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
line wrap: on
line source
# cbrtl.m4 serial 5 dnl Copyright (C) 2012-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_CBRTL], [ m4_divert_text([DEFAULTS], [gl_cbrtl_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) AC_REQUIRE([gl_FUNC_CBRT]) dnl Persuade glibc <math.h> to declare cbrtl(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether cbrtl() exists. Assume that cbrtl(), if it exists, is dnl defined in the same library as cbrt(). save_LIBS="$LIBS" LIBS="$LIBS $CBRT_LIBM" AC_CHECK_FUNCS([cbrtl]) LIBS="$save_LIBS" if test $ac_cv_func_cbrtl = yes; then CBRTL_LIBM="$CBRT_LIBM" dnl Also check whether it's declared. dnl IRIX 6.5 has cbrtl() in libm but doesn't declare it in <math.h>. AC_CHECK_DECL([cbrtl], , [HAVE_DECL_CBRTL=0], [[#include <math.h>]]) save_LIBS="$LIBS" LIBS="$LIBS $CBRTL_LIBM" gl_FUNC_CBRTL_WORKS LIBS="$save_LIBS" case "$gl_cv_func_cbrtl_works" in *yes) ;; *) REPLACE_CBRTL=1 ;; esac m4_ifdef([gl_FUNC_CBRTL_IEEE], [ if test $gl_cbrtl_required = ieee && test $REPLACE_CBRTL = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether cbrtl works according to ISO C 99 with IEC 60559], [gl_cv_func_cbrtl_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $CBRTL_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> ]gl_LONG_DOUBLE_MINUS_ZERO_CODE[ ]gl_LONG_DOUBLE_SIGNBIT_CODE[ static long double dummy (long double x) { return 0; } int main (int argc, char *argv[]) { extern #ifdef __cplusplus "C" #endif long double cbrtl (long double); long double (*my_cbrtl) (long double) = argc ? cbrtl : dummy; long double f; /* Test cbrtl(-0.0). This test fails on IRIX 6.5. */ f = my_cbrtl (minus_zerol); if (!(f == 0.0L) || (signbitl (minus_zerol) && !signbitl (f))) return 1; return 0; } ]])], [gl_cv_func_cbrtl_ieee=yes], [gl_cv_func_cbrtl_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_cbrtl_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_cbrtl_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_cbrtl_ieee" in *yes) ;; *) REPLACE_CBRTL=1 ;; esac fi ]) else HAVE_CBRTL=0 HAVE_DECL_CBRTL=0 fi if test $HAVE_CBRTL = 0 || test $REPLACE_CBRTL = 1; then dnl Find libraries needed to link lib/cbrtl.c. if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then CBRTL_LIBM="$CBRT_LIBM" else AC_REQUIRE([gl_FUNC_FREXPL]) AC_REQUIRE([gl_FUNC_LDEXPL]) CBRTL_LIBM= dnl Append $FREXPL_LIBM to CBRTL_LIBM, avoiding gratuitous duplicates. case " $CBRTL_LIBM " in *" $FREXPL_LIBM "*) ;; *) CBRTL_LIBM="$CBRTL_LIBM $FREXPL_LIBM" ;; esac dnl Append $LDEXPL_LIBM to CBRTL_LIBM, avoiding gratuitous duplicates. case " $CBRTL_LIBM " in *" $LDEXPL_LIBM "*) ;; *) CBRTL_LIBM="$CBRTL_LIBM $LDEXPL_LIBM" ;; esac fi fi AC_SUBST([CBRTL_LIBM]) ]) dnl Test whether cbrtl() works. dnl On OpenBSD 5.1/SPARC, cbrtl(16.0L) is = 1.2599... AC_DEFUN([gl_FUNC_CBRTL_WORKS], [ AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether cbrtl works], [gl_cv_func_cbrtl_works], [ AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #include <math.h> extern #ifdef __cplusplus "C" #endif long double cbrtl (long double); volatile long double x; long double y; int main () { x = 16.0L; y = cbrtl (x); if (y < 2.0L) return 1; return 0; } ]])], [gl_cv_func_cbrtl_works=yes], [gl_cv_func_cbrtl_works=no], [case "$host_os" in openbsd*) gl_cv_func_cbrtl_works="guessing no";; *) gl_cv_func_cbrtl_works="guessing yes";; esac ]) ]) ])