1 | # Process this file with autoconf to produce a configure script. |
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2 | # Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc. |
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3 | # Contributed by Dave Love (d.love@dl.ac.uk). |
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4 | # |
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5 | #This file is part of GNU Fortran. |
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6 | # |
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7 | #GNU Fortran is free software; you can redistribute it and/or modify |
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8 | #it under the terms of the GNU General Public License as published by |
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9 | #the Free Software Foundation; either version 2, or (at your option) |
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10 | #any later version. |
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11 | # |
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12 | #GNU Fortran is distributed in the hope that it will be useful, |
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13 | #but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | #GNU General Public License for more details. |
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16 | # |
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17 | #You should have received a copy of the GNU General Public License |
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18 | #along with GNU Fortran; see the file COPYING. If not, write to |
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19 | #the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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20 | #02111-1307, USA. |
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21 | |
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22 | AC_PREREQ(2.12.1) |
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23 | AC_INIT(getarg_.c) |
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24 | |
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25 | dnl Checks for programs. |
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26 | |
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27 | dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may |
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28 | dnl not be able to. |
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29 | define([AC_PROG_CC_WORKS],[]) |
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30 | |
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31 | # For g77 we'll set CC to point at the built gcc, but this will get it into |
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32 | # the makefiles |
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33 | AC_PROG_CC |
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34 | |
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35 | test "$AR" || AR=ar |
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36 | AC_SUBST(AR) |
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37 | AC_PROG_MAKE_SET |
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38 | |
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39 | dnl Checks for libraries. |
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40 | |
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41 | dnl Checks for header files. |
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42 | # Sanity check for the cross-compilation case: |
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43 | AC_CHECK_HEADER(stdio.h,:, |
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44 | [AC_MSG_ERROR([Can't find stdio.h. |
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45 | You must have a usable C system for the target already installed, at least |
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46 | including headers and, preferably, the library, before you can configure |
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47 | the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c', |
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48 | then the target library, then build with \`LANGUAGES=f77'.])]) |
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49 | |
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50 | AC_HEADER_STDC |
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51 | dnl We could do this if we didn't know we were using gcc |
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52 | dnl AC_MSG_CHECKING(for prototype-savvy compiler) |
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53 | dnl AC_CACHE_VAL(g77_cv_sys_proto, |
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54 | dnl [AC_TRY_LINK(, |
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55 | dnl dnl looks screwy because TRY_LINK expects a function body |
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56 | dnl [return 0;} int foo (int * bar) {], |
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57 | dnl g77_cv_sys_proto=yes, |
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58 | dnl [g77_cv_sys_proto=no |
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59 | dnl AC_DEFINE(KR_headers)])]) |
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60 | dnl AC_MSG_RESULT($g77_cv_sys_proto) |
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61 | |
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62 | AC_MSG_CHECKING(for posix) |
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63 | AC_CACHE_VAL(g77_cv_header_posix, |
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64 | AC_EGREP_CPP(yes, |
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65 | [#include <sys/types.h> |
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66 | #include <unistd.h> |
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67 | #ifdef _POSIX_VERSION |
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68 | yes |
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69 | #endif |
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70 | ], |
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71 | g77_cv_header_posix=yes, |
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72 | g77_cv_header_posix=no)) |
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73 | AC_MSG_RESULT($g77_cv_header_posix) |
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74 | |
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75 | # We can rely on the GNU library being posix-ish. I guess checking the |
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76 | # header isn't actually like checking the functions, though... |
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77 | AC_MSG_CHECKING(for GNU library) |
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78 | AC_CACHE_VAL(g77_cv_lib_gnu, |
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79 | AC_EGREP_CPP(yes, |
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80 | [#include <stdio.h> |
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81 | #ifdef __GNU_LIBRARY__ |
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82 | yes |
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83 | #endif |
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84 | ], |
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85 | g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no)) |
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86 | AC_MSG_RESULT($g77_cv_lib_gnu) |
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87 | |
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88 | dnl Checks for library functions. |
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89 | AC_TYPE_SIGNAL |
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90 | # we'll get atexit by default |
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91 | if test $ac_cv_header_stdc != yes; then |
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92 | AC_CHECK_FUNC(atexit, |
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93 | AC_DEFINE(onexit,atexit),dnl just in case |
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94 | [AC_DEFINE(NO_ONEXIT) |
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95 | AC_CHECK_FUNC(onexit,, |
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96 | [AC_CHECK_FUNC(on_exit, |
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97 | AC_DEFINE(onexit,on_exit),)])]) |
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98 | else true |
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99 | fi |
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100 | |
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101 | dnl perhaps should check also for remainder |
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102 | dnl Unfortunately, the message implies we're just checking for -lm... |
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103 | AC_CHECK_LIB(m,drem,AC_DEFINE(IEEE_drem)) |
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104 | |
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105 | AC_DEFINE(Skip_f2c_Undefs) |
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106 | AC_DEFINE(IEEE_COMPLEX_DIVIDE) |
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107 | |
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108 | AC_OUTPUT(Makefile) |
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109 | |
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110 | dnl Local Variables: |
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111 | dnl comment-start: "dnl " |
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112 | dnl comment-end: "" |
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113 | dnl comment-start-skip: "\\bdnl\\b\\s *" |
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114 | dnl End: |
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