-# acosl.m4 serial 1
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# acosl.m4 serial 4
+dnl Copyright (C) 2010-2011 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_CACHE_CHECK([whether acosl() can be used without linking with libm],
[gl_cv_func_acosl_no_libm],
[
- AC_TRY_LINK([#ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [return acosl (x) > 1;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double x;]],
+ [[return acosl (x) > 1;]])],
[gl_cv_func_acosl_no_libm=yes],
[gl_cv_func_acosl_no_libm=no])
])
[
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
- AC_TRY_LINK([#ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [return acosl (x) > 1;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double x;]],
+ [[return acosl (x) > 1;]])],
[gl_cv_func_acosl_in_libm=yes],
[gl_cv_func_acosl_in_libm=no])
LIBS="$save_LIBS"
else
HAVE_DECL_ACOSL=0
HAVE_ACOSL=0
- AC_LIBOBJ([acosl])
+ dnl Find libraries needed to link lib/acosl.c.
AC_REQUIRE([gl_FUNC_ASINL])
AC_REQUIRE([gl_FUNC_SQRTL])
- ACOSL_LIBM="$ASINL_LIBM $SQRTL_LIBM"
+ dnl Append $ASINL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
+ case " $ACOSL_LIBM " in
+ *" $ASINL_LIBM "*) ;;
+ *) ACOSL_LIBM="$ACOSL_LIBM $ASINL_LIBM" ;;
+ esac
+ dnl Append $SQRTL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
+ case " $ACOSL_LIBM " in
+ *" $SQRTL_LIBM "*) ;;
+ *) ACOSL_LIBM="$ACOSL_LIBM $SQRTL_LIBM" ;;
+ esac
fi
AC_SUBST([ACOSL_LIBM])
])