configure.ac

math library from gnu

dnl Process this file with autoconf to produce a configure script.

AC_INIT([gsl],[1.12])
AC_CONFIG_SRCDIR(gsl_math.h)

AM_INIT_AUTOMAKE([gnu no-dependencies])
AC_CONFIG_HEADERS([config.h])
AM_MAINTAINER_MODE

dnl Library versioning (current:revision:age)
dnl See the libtool manual for an explanation of the numbers
dnl
dnl gsl-1.0    libgsl 0:0:0  libgslcblas 0:0:0
dnl gsl-1.1    libgsl 1:0:1  libgslcblas 0:0:0
dnl gsl-1.1.1  libgsl 2:0:2  libgslcblas 0:0:0
dnl gsl-1.2    libgsl 3:0:3  libgslcblas 0:0:0
dnl gsl-1.3    libgsl 4:0:4  libgslcblas 0:0:0
dnl gsl-1.4    libgsl 5:0:5  libgslcblas 0:0:0
dnl gsl-1.5    libgsl 6:0:6  libgslcblas 0:0:0
dnl gsl-1.6    libgsl 7:0:7  libgslcblas 0:0:0
dnl gsl-1.7    libgsl 8:0:8  libgslcblas 0:0:0
dnl gsl-1.8    libgsl 9:0:9  libgslcblas 0:0:0
dnl gsl-1.9    libgsl 10:0:10 libgslcblas 0:0:0 
dnl gsl-1.10   libgsl 10:0:10 (*) libgslcblas 0:0:0 
dnl gsl-1.11   libgsl 12:0:12  libgslcblas 0:0:0 
dnl gsl-1.12   libgsl 13:0:13  libgslcblas 0:0:0 
dnl 
dnl (*) There was an error on this release.  Firstly, the versioning
dnl numbers were not updated.  Secondly, 2 functions were removed, but
dnl the age not reset--this should have been 11:0:0.  However these
dnl functions were not documented and are regarded as internal, so we
dnl will assume 11:0:11.
dnl
dnl How to update library version number
dnl ====================================
dnl 
dnl C: increment if the interface has additions, changes, removals.
dnl
dnl R: increment any time the source changes; set to 0 if you
dnl incremented CURRENT
dnl
dnl A: increment if any interfaces have been added; set to 0 if any
dnl interfaces have been removed. removal has precedence over adding,
dnl so set to 0 if both happened.

dnl
GSL_CURRENT=13
GSL_REVISION=0
GSL_AGE=13
dnl
CBLAS_CURRENT=0
CBLAS_REVISION=0
CBLAS_AGE=0

GSL_LT_VERSION="${GSL_CURRENT}:${GSL_REVISION}:${GSL_AGE}"
AC_SUBST(GSL_LT_VERSION)

GSL_LT_CBLAS_VERSION="${CBLAS_CURRENT}:${CBLAS_REVISION}:${CBLAS_AGE}"
AC_SUBST(GSL_LT_CBLAS_VERSION)

case "$VERSION" in
    *+)
        ;;
    *)
        AC_DEFINE(RELEASED,[],[Defined if this is an official release])
        ;;
esac

dnl things required by automake
dnl AC_ARG_PROGRAM
AC_PROG_MAKE_SET

dnl Check for which system.
AC_CANONICAL_HOST

dnl Checks for programs.
AC_LANG(C)
AC_PROG_CC
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_LIBTOOL

dnl Check compiler features
AC_TYPE_SIZE_T
dnl AC_C_CONST
AC_C_VOLATILE
AC_C_INLINE
AC_C_CHAR_UNSIGNED

GSL_CFLAGS="-I$includedir"
GSL_LIBS="-L$libdir -lgsl"

AC_SUBST(GSL_CFLAGS)
AC_SUBST(GSL_LIBS)

dnl Check for "extern inline", using a modified version of the test
dnl for AC_C_INLINE from acspecific.mt
dnl
AC_CACHE_CHECK([for GNU-style extern inline], ac_cv_c_extern_inline,
[ac_cv_c_extern_inline=no
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[extern $ac_cv_c_inline double foo(double x);
extern $ac_cv_c_inline double foo(double x) { return x + 1.0 ; } ;
double foo (double x) { return x + 1.0 ; };]], [[  foo(1.0)  ]])],[ac_cv_c_extern_inline="yes"],[])
])

if test "$ac_cv_c_extern_inline" != no ; then
   AC_DEFINE(HAVE_INLINE,[],[Define if you have inline])
else
   AC_CACHE_CHECK([for C99-style inline], ac_cv_c_c99inline,
   [ac_cv_c_c99inline=no
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef __GNUC_STDC_INLINE__
   inline double foo(double x);
   inline double foo(double x) { return x + 1.0 ; };
   #endif]], 
   [[  foo(1.0)  ]])],[ac_cv_c_c99inline="yes"],[])
   ])

   if test "$ac_cv_c_c99inline" != no ; then
      AC_DEFINE(HAVE_INLINE,[],[Define if you have inline])
   fi
fi

dnl Checks for header files.
AC_CHECK_HEADERS(ieeefp.h)

dnl Checks for typedefs, structures, and compiler characteristics.

case "$host_os" in
     *mingw*)
	MINGW=true
	;;
esac

AM_CONDITIONAL(MINGW32_HOST, test "$MINGW" = "true")

dnl Checks for library functions.

dnl AC_FUNC_ALLOCA
AC_FUNC_VPRINTF

dnl strcasecmp, strerror, xmalloc, xrealloc, probably others should be added.
dnl removed strerror from this list, it's hardcoded in the err/ directory
dnl Any functions which appear in this list of functions should be provided
dnl in the utils/ directory
dnl xmalloc is not used, removed (bjg)
AC_REPLACE_FUNCS(memcpy memmove strdup strtol strtoul)

AC_CACHE_CHECK(for EXIT_SUCCESS and EXIT_FAILURE,
ac_cv_decl_exit_success_and_failure,
AC_EGREP_CPP(yes,
[
#include <stdlib.h>
#ifdef EXIT_SUCCESS
yes
#endif
], 
ac_cv_decl_exit_success_and_failure=yes,
ac_cv_decl_exit_success_and_failure=no)
)

if test "$ac_cv_decl_exit_success_and_failure" = yes ; then
  AC_DEFINE(HAVE_EXIT_SUCCESS_AND_FAILURE,1,[Defined if you have ansi EXIT_SUCCESS and EXIT_FAILURE in stdlib.h])
fi ;

dnl Use alternate libm if specified by user

if test "x$LIBS" = "x" ; then
  AC_CHECK_LIB(m, cos)
fi

dnl Remember to put a definition in acconfig.h for each of these
AC_CHECK_DECLS(feenableexcept,,,[#define _GNU_SOURCE 1
#include <fenv.h>]) 
AC_CHECK_DECLS(fesettrapenable,,,[#define _GNU_SOURCE 1
#include <fenv.h>]) 
AC_CHECK_DECLS(hypot,,,[#include <math.h>]) 
AC_CHECK_DECLS(expm1,,,[#include <math.h>])
AC_CHECK_DECLS(acosh,,,[#include <math.h>])
AC_CHECK_DECLS(asinh,,,[#include <math.h>])
AC_CHECK_DECLS(atanh,,,[#include <math.h>])
AC_CHECK_DECLS(ldexp,,,[#include <math.h>])
AC_CHECK_DECLS(frexp,,,[#include <math.h>])
AC_CHECK_DECLS(isinf,,,[#include <math.h>])
AC_CHECK_DECLS(isfinite,,,[#include <math.h>])
AC_CHECK_DECLS(finite,,,[#include <math.h>
#if HAVE_IEEEFP_H
#include <ieeefp.h>
#endif])
AC_CHECK_DECLS(isnan,,,[#include <math.h>])

dnl OpenBSD has a broken implementation of log1p.
case "$host" in
    *-*-*openbsd*)
       AC_MSG_RESULT([avoiding OpenBSD system log1p - using gsl version])
       ;;
    *)
        AC_CHECK_DECLS(log1p,,,[#include <math.h>])
       ;;
esac

AC_CACHE_CHECK([for long double stdio], ac_cv_func_printf_longdouble,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdlib.h>
#include <stdio.h>
int main (void) 
{ 
const char * s = "5678.25"; long double x = 1.234 ; 
fprintf(stderr,"%Lg\n",x) ; 
sscanf(s, "%Lg", &x);
if (x == 5678.25) {exit (0);} else {exit(1); };
}]])],[ac_cv_func_printf_longdouble="yes"],[ac_cv_func_printf_longdouble="no"],[ac_cv_func_printf_longdouble="no"])])

if test "$ac_cv_func_printf_longdouble" != no; then
  AC_DEFINE(HAVE_PRINTF_LONGDOUBLE,1,[Define this if printf can handle %Lf for long double])
fi

AC_CACHE_CHECK([for extended floating point registers],ac_cv_c_extended_fp,
[case "$host" in
    *sparc*-*-*)
        ac_cv_c_extended_fp=no
        ;;     
    *powerpc*-*-*)
        ac_cv_c_extended_fp=no
        ;;      
    *hppa*-*-*)
        ac_cv_c_extended_fp=no
        ;;      
    *alpha*-*-*)
        ac_cv_c_extended_fp=no
        ;;      
    *68k*-*-*)
        ac_cv_c_extended_fp=yes
        ;;      
    *86-*-*)
        ac_cv_c_extended_fp=yes
        ;;      
    x86_64-*-*)
        ac_cv_c_extended_fp=yes
        ;;      
    *) 
        ac_cv_c_extended_fp=unknown
        ;;
esac
])

if test $ac_cv_c_extended_fp != "no" ; then
    AC_DEFINE(HAVE_EXTENDED_PRECISION_REGISTERS,1,[Defined on architectures with excess floating-point precision])
fi

AC_CACHE_CHECK([for IEEE arithmetic interface type], ac_cv_c_ieee_interface,
[case "$host" in
    sparc-*-linux*) 
        ac_cv_c_ieee_interface=gnusparc
        ;;
    m68k-*-linux*) 
        ac_cv_c_ieee_interface=gnum68k
        ;;
    powerpc-*-linux*) 
        ac_cv_c_ieee_interface=gnuppc
        ;;
    *86-*-gnu | *86_64-*-gnu | *86-*-linux* | *86_64-*-linux*) 
        ac_cv_c_ieee_interface=gnux86
        ;;
    *-*-sunos4*) 
        ac_cv_c_ieee_interface=sunos4
        ;;
    *-*-solaris*) 
        ac_cv_c_ieee_interface=solaris
        ;;