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* build-aux/gendocs.sh (version): * doc/gendocs_template: * doc/gendocs_template_min: * doc/gnulib.texi: * lib/version-etc.c (COPYRIGHT_YEAR): Update copyright dates by hand in templates and the like. * all files: Run 'make update-copyright'.
85 lines
2.8 KiB
Plaintext
85 lines
2.8 KiB
Plaintext
# acosl.m4 serial 8
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dnl Copyright (C) 2010-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_ACOSL],
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[
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AC_REQUIRE([gl_MATH_H_DEFAULTS])
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AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
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dnl Persuade glibc <math.h> to declare acosl().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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ACOSL_LIBM=
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AC_CACHE_CHECK([whether acosl() can be used without linking with libm],
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[gl_cv_func_acosl_no_libm],
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[
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#ifndef __NO_MATH_INLINES
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# define __NO_MATH_INLINES 1 /* for glibc */
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#endif
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#include <math.h>
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long double (*funcptr) (long double) = acosl;
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long double x;]],
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[[return funcptr (x) > 1
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|| acosl (x) > 1;]])],
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[gl_cv_func_acosl_no_libm=yes],
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[gl_cv_func_acosl_no_libm=no])
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])
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if test $gl_cv_func_acosl_no_libm = no; then
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AC_CACHE_CHECK([whether acosl() can be used with libm],
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[gl_cv_func_acosl_in_libm],
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[
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save_LIBS="$LIBS"
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LIBS="$LIBS -lm"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[[#ifndef __NO_MATH_INLINES
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# define __NO_MATH_INLINES 1 /* for glibc */
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#endif
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#include <math.h>
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long double (*funcptr) (long double) = acosl;
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long double x;]],
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[[return funcptr (x) > 1
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|| acosl (x) > 1;]])],
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[gl_cv_func_acosl_in_libm=yes],
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[gl_cv_func_acosl_in_libm=no])
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LIBS="$save_LIBS"
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])
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if test $gl_cv_func_acosl_in_libm = yes; then
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ACOSL_LIBM=-lm
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fi
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fi
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if test $gl_cv_func_acosl_no_libm = yes \
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|| test $gl_cv_func_acosl_in_libm = yes; then
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dnl Also check whether it's declared.
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dnl Mac OS X 10.3 has acosl() in libc but doesn't declare it in <math.h>.
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AC_CHECK_DECL([acosl], , [HAVE_DECL_ACOSL=0], [[#include <math.h>]])
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else
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HAVE_DECL_ACOSL=0
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HAVE_ACOSL=0
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dnl Find libraries needed to link lib/acosl.c.
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if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
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AC_REQUIRE([gl_FUNC_ACOS])
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ACOSL_LIBM="$ACOS_LIBM"
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else
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AC_REQUIRE([gl_FUNC_ASINL])
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AC_REQUIRE([gl_FUNC_SQRTL])
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dnl Append $ASINL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
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case " $ACOSL_LIBM " in
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*" $ASINL_LIBM "*) ;;
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*) ACOSL_LIBM="$ACOSL_LIBM $ASINL_LIBM" ;;
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esac
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dnl Append $SQRTL_LIBM to ACOSL_LIBM, avoiding gratuitous duplicates.
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case " $ACOSL_LIBM " in
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*" $SQRTL_LIBM "*) ;;
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*) ACOSL_LIBM="$ACOSL_LIBM $SQRTL_LIBM" ;;
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esac
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fi
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fi
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AC_SUBST([ACOSL_LIBM])
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])
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