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(ftell_.c) |
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24 | |
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25 | dnl Checks for programs. |
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26 | # For g77 we'll set CC to point at the built gcc, but this will get it into |
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27 | # the makefiles |
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28 | AC_PROG_CC |
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29 | |
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30 | test "$AR" || AR=ar |
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31 | AC_SUBST(AR) |
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32 | AC_PROG_MAKE_SET |
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33 | |
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34 | dnl Checks for libraries. |
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35 | |
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36 | dnl Checks for header files. |
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37 | # Sanity check for the cross-compilation case: |
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38 | AC_CHECK_HEADER(stdio.h,:, |
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39 | [AC_MSG_ERROR([Can't find stdio.h. |
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40 | You must have a usable C system for the target already installed, at least |
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41 | including headers and, preferably, the library, before you can configure |
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42 | the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c', |
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43 | then the target library, then build with \`LANGUAGES=f77'.])]) |
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44 | |
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45 | AC_HEADER_STDC |
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46 | dnl We could do this if we didn't know we were using gcc |
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47 | dnl AC_MSG_CHECKING(for prototype-savvy compiler) |
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48 | dnl AC_CACHE_VAL(g77_cv_sys_proto, |
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49 | dnl [AC_TRY_LINK(, |
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50 | dnl dnl looks screwy because TRY_LINK expects a function body |
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51 | dnl [return 0;} int foo (int * bar) {], |
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52 | dnl g77_cv_sys_proto=yes, |
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53 | dnl [g77_cv_sys_proto=no |
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54 | dnl AC_DEFINE(KR_headers)])]) |
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55 | dnl AC_MSG_RESULT($g77_cv_sys_proto) |
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56 | |
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57 | AC_MSG_CHECKING(for posix) |
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58 | AC_CACHE_VAL(g77_cv_header_posix, |
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59 | AC_EGREP_CPP(yes, |
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60 | [#include <sys/types.h> |
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61 | #include <unistd.h> |
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62 | #ifdef _POSIX_VERSION |
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63 | yes |
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64 | #endif |
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65 | ], |
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66 | g77_cv_header_posix=yes, |
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67 | g77_cv_header_posix=no)) |
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68 | AC_MSG_RESULT($g77_cv_header_posix) |
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69 | |
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70 | # We can rely on the GNU library being posix-ish. I guess checking the |
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71 | # header isn't actually like checking the functions, though... |
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72 | AC_MSG_CHECKING(for GNU library) |
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73 | AC_CACHE_VAL(g77_cv_lib_gnu, |
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74 | AC_EGREP_CPP(yes, |
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75 | [#include <stdio.h> |
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76 | #ifdef __GNU_LIBRARY__ |
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77 | yes |
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78 | #endif |
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79 | ], |
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80 | g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no)) |
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81 | AC_MSG_RESULT($g77_cv_lib_gnu) |
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82 | |
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83 | # Apparently cygwin needs to be special-cased. |
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84 | AC_MSG_CHECKING([for cyg\`win'32]) |
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85 | AC_CACHE_VAL(g77_cv_sys_cygwin32, |
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86 | AC_EGREP_CPP(yes, |
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87 | [#ifdef __CYGWIN32__ |
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88 | yes |
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89 | #endif |
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90 | ], |
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91 | g77_cv_sys_cygwin32=yes, |
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92 | g77_cv_sys_cygwin32=no)) |
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93 | AC_MSG_RESULT($g77_cv_sys_cygwin32) |
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94 | |
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95 | # ditto for mingw32. |
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96 | AC_MSG_CHECKING([for mingw32]) |
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97 | AC_CACHE_VAL(g77_cv_sys_mingw32, |
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98 | AC_EGREP_CPP(yes, |
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99 | [#ifdef __MINGW32__ |
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100 | yes |
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101 | #endif |
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102 | ], |
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103 | g77_cv_sys_mingw32=yes, |
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104 | g77_cv_sys_mingw32=no)) |
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105 | AC_MSG_RESULT($g77_cv_sys_mingw32) |
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106 | |
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107 | |
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108 | AC_CHECK_HEADER(fcntl.h, |
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109 | test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE), |
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110 | AC_DEFINE(NO_FCNTL) AC_DEFINE(OPEN_DECL)) |
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111 | |
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112 | dnl Checks for typedefs, structures, and compiler characteristics. |
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113 | AC_C_CONST |
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114 | AC_TYPE_SIZE_T |
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115 | |
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116 | dnl Checks for library functions. |
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117 | |
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118 | # This should always succeed on unix. |
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119 | # Apparently positive result on cygwin loses re. NON_UNIX_STDIO |
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120 | # (as of cygwin b18). Likewise on mingw. |
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121 | AC_CHECK_FUNC(fstat) |
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122 | AC_MSG_CHECKING([need for NON_UNIX_STDIO]) |
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123 | if test $g77_cv_sys_cygwin32 = yes \ |
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124 | || test $g77_cv_sys_mingw32 = yes \ |
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125 | || test $ac_cv_func_fstat = no; then |
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126 | AC_MSG_RESULT(yes) |
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127 | AC_DEFINE(NON_UNIX_STDIO) |
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128 | else |
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129 | AC_MSG_RESULT(no) |
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130 | fi |
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131 | |
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132 | AC_CHECK_FUNCS(tempnam) |
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133 | |
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134 | # posix will guarantee the right behaviour for sprintf, else we can't be |
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135 | # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance. |
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136 | # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe |
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137 | # we're posix-conformant, so always do the test. |
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138 | AC_MSG_CHECKING(for ansi/posix sprintf result) |
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139 | dnl This loses if included as an argument to AC_CACHE_VAL because the |
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140 | dnl changequote doesn't take effect and the [] vanish. |
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141 | dnl fixme: use cached value |
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142 | AC_TRY_RUN(changequote(<<, >>)dnl |
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143 | <<#include <stdio.h> |
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144 | /* does sprintf return the number of chars transferred? */ |
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145 | main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);} |
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146 | >>changequote([, ]), |
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147 | g77_cv_sys_sprintf_ansi=yes, |
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148 | g77_cv_sys_sprintf_ansi=no, |
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149 | g77_cv_sys_sprintf_ansi=no) |
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150 | AC_CACHE_VAL(g77_cv_sys_sprintf_ansi, |
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151 | g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi) |
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152 | dnl We get a misleading `(cached)' message... |
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153 | AC_MSG_RESULT($g77_cv_sys_sprintf_ansi) |
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154 | |
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155 | # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't |
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156 | # understand why. |
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157 | if test $g77_cv_sys_sprintf_ansi != yes; then |
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158 | AC_DEFINE(USE_STRLEN) |
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159 | fi |
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160 | |
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161 | # define NON_ANSI_RW_MODES on unix (can't hurt) |
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162 | AC_MSG_CHECKING(NON_ANSI_RW_MODES) |
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163 | AC_EGREP_CPP(yes, |
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164 | [#ifdef unix |
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165 | yes |
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166 | #endif |
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167 | #ifdef __unix |
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168 | yes |
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169 | #endif |
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170 | #ifdef __unix__ |
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171 | yes |
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172 | #endif |
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173 | ], is_unix=yes, is_unix=no) |
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174 | # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts. |
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175 | if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then |
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176 | AC_MSG_RESULT(no) |
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177 | else |
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178 | if test $is_unix = yes; then |
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179 | AC_DEFINE(NON_ANSI_RW_MODES) |
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180 | AC_MSG_RESULT(yes) |
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181 | else |
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182 | AC_MSG_RESULT(no) |
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183 | fi |
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184 | fi |
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185 | |
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186 | # This EOF_CHAR is a misfeature on unix. |
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187 | AC_DEFINE(NO_EOF_CHAR_CHECK) |
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188 | |
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189 | AC_DEFINE(Skip_f2c_Undefs) |
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190 | |
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191 | AC_OUTPUT(Makefile) |
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192 | |
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193 | dnl We might have configuration options to: |
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194 | dnl * change unit preconnexion in err.c (f_init.c) |
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195 | dnl * -DALWAYS_FLUSH |
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196 | dnl * -DOMIT_BLANK_CC |
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197 | |
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198 | dnl Local Variables: |
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199 | dnl comment-start: "dnl " |
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200 | dnl comment-end: "" |
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201 | dnl comment-start-skip: "\\bdnl\\b\\s *" |
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202 | dnl End: |
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